Publish camera frame

camera/camera.go

@@ -0,0 +1,174 @@
+package camera
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"github.com/avast/retry-go"
+	"github.com/cyrilix/robocar-protobuf/go/events"
+	"github.com/cyrilix/robocar-simulator/simulator"
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes/timestamp"
+	log "github.com/sirupsen/logrus"
+	"io"
+	"net"
+	"time"
+)
+
+func New(publisher Publisher, addressSimulator string) *Gateway {
+	log.Info("run camera camera")
+
+	return &Gateway{
+		address:          addressSimulator,
+		publisher:        publisher,
+	}
+}
+
+/* Simulator interface to publish camera frames into mqtt topic */
+type Gateway struct {
+	cancel           chan interface{}
+
+	address string
+	conn    io.ReadCloser
+
+	publisher Publisher
+}
+
+func (p *Gateway) Start() error {
+	log.Info("connect to simulator")
+	p.cancel = make(chan interface{})
+	msgChan := make(chan *simulator.SimulatorMsg)
+
+	go p.run(msgChan)
+
+	for {
+		select {
+		case msg := <-msgChan:
+			go p.publishFrame(msg)
+		case <-p.cancel:
+			return nil
+		}
+	}
+}
+
+func (p *Gateway) Stop() {
+	log.Info("close simulator gateway")
+	close(p.cancel)
+
+	if err := p.Close(); err != nil {
+		log.Printf("unexpected error while simulator connection is closed: %v", err)
+	}
+}
+
+func (p *Gateway) Close() error {
+	if p.conn == nil {
+		log.Warnln("no connection to close")
+		return nil
+	}
+	if err := p.conn.Close(); err != nil {
+		return fmt.Errorf("unable to close connection to simulator: %v", err)
+	}
+	return nil
+}
+
+func (p *Gateway) run(msgChan chan<- *simulator.SimulatorMsg) {
+	err := retry.Do(func() error {
+		conn, err := connect(p.address)
+		if err != nil {
+			return fmt.Errorf("unable to connect to simulator at %v", p.address)
+		}
+		p.conn = conn
+		return nil
+	},
+		retry.Delay(1*time.Second),
+	)
+	if err != nil {
+		log.Panicf("unable to connect to simulator: %v", err)
+	}
+
+	reader := bufio.NewReader(p.conn)
+
+	err = retry.Do(
+		func() error { return p.listen(msgChan, reader) },
+	)
+	if err != nil {
+		log.Errorf("unable to connect to server: %v", err)
+	}
+}
+
+func (p *Gateway) listen(msgChan chan<- *simulator.SimulatorMsg, reader *bufio.Reader) error {
+	for {
+		rawLine, err := reader.ReadBytes('\n')
+		if err == io.EOF {
+			log.Info("Connection closed")
+			return err
+		}
+		if err != nil {
+			return fmt.Errorf("unable to read response: %v", err)
+		}
+
+		var msg simulator.SimulatorMsg
+		err = json.Unmarshal(rawLine, &msg)
+		if err != nil {
+			log.Errorf("unable to unmarshal simulator msg: %v", err)
+		}
+		if "telemetry" != msg.MsgType {
+			continue
+		}
+		msgChan <- &msg
+	}
+}
+
+func (p *Gateway) publishFrame(msgSim *simulator.SimulatorMsg) {
+	now := time.Now()
+	msg := &events.FrameMessage{
+		Id: &events.FrameRef{
+			Name: "camera",
+			Id:   fmt.Sprintf("%d%03d", now.Unix(), now.Nanosecond()/1000/1000),
+			CreatedAt: &timestamp.Timestamp{
+				Seconds: now.Unix(),
+				Nanos:   int32(now.Nanosecond()),
+			},
+		},
+		Frame: msgSim.Image,
+	}
+
+	payload, err := proto.Marshal(msg)
+	if err != nil {
+		log.Errorf("unable to marshal protobuf message: %v", err)
+	}
+	p.publisher.Publish(&payload)
+}
+
+var connect = func(address string) (io.ReadWriteCloser, error) {
+	conn, err := net.Dial("tcp", address)
+	if err != nil {
+		return nil, fmt.Errorf("unable to connect to %v", address)
+	}
+	return conn, nil
+}
+
+type Publisher interface {
+	Publish(payload *[]byte)
+}
+
+func NewMqttPublisher(client mqtt.Client, topic string) Publisher {
+	return &MqttPublisher{
+		client: client,
+		topic: topic,
+	}
+}
+
+type MqttPublisher struct {
+	client mqtt.Client
+	topic string
+}
+
+func (m *MqttPublisher) Publish(payload *[]byte) {
+	token := m.client.Publish(m.topic, 0, false, *payload)
+	token.WaitTimeout(10 * time.Millisecond)
+	if err := token.Error(); err != nil {
+		log.Errorf("unable to publish frame: %v", err)
+	}
+}

camera/camera_test.go

@@ -0,0 +1,153 @@
+package camera
+
+import (
+	"bufio"
+	"fmt"
+	"github.com/cyrilix/robocar-protobuf/go/events"
+	"github.com/golang/protobuf/proto"
+	log "github.com/sirupsen/logrus"
+	"io"
+	"io/ioutil"
+	"net"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+)
+
+type MockPublisher struct {
+	muPubEvents     sync.Mutex
+	publishedEvents []*[]byte
+}
+
+func (p *MockPublisher) Publish(payload *[]byte) {
+	p.muPubEvents.Lock()
+	defer p.muPubEvents.Unlock()
+	p.publishedEvents = append(p.publishedEvents, payload)
+}
+
+func (p *MockPublisher) Events() []*[]byte {
+	p.muPubEvents.Lock()
+	defer p.muPubEvents.Unlock()
+	eventsMsg := make([]*[]byte, len(p.publishedEvents), len(p.publishedEvents))
+	copy(eventsMsg, p.publishedEvents)
+	return eventsMsg
+}
+
+func TestPart_ListenEvents(t *testing.T) {
+	connMock := ConnMock{}
+	err := connMock.Listen()
+	if err != nil {
+		t.Errorf("unable to start mock server: %v", err)
+	}
+	defer func() {
+		if err := connMock.Close(); err != nil {
+			t.Errorf("unable to close mock server: %v", err)
+		}
+	}()
+
+
+	publisher := MockPublisher{publishedEvents: make([]*[]byte, 0)}
+
+	part := New(&publisher, connMock.Addr())
+	go func() {
+		err := part.Start()
+		if err != nil {
+			t.Fatalf("unable to start camera simulator: %v", err)
+		}
+	}()
+	defer func() {
+		if err := part.Close(); err != nil {
+			t.Errorf("unable to close camera simulator: %v", err)
+		}
+	}()
+
+	testContent, err := ioutil.ReadFile("testdata/msg.json")
+	lines := strings.Split(string(testContent), "\n")
+
+	for idx, line := range lines {
+		time.Sleep(5 * time.Millisecond)
+		err = connMock.WriteMsg(line)
+		if err != nil {
+			t.Errorf("[line %v/%v] unable to write line: %v", idx+1, len(lines), err)
+		}
+	}
+
+	time.Sleep(10 * time.Millisecond)
+	expectedFrames := 16
+	if len(publisher.Events()) != expectedFrames {
+		t.Errorf("invalid number of frame emmitted: %v, wants %v", len(publisher.Events()), expectedFrames)
+	}
+	for _, byteMsg := range publisher.Events() {
+		var msg events.FrameMessage
+		err = proto.Unmarshal(*byteMsg, &msg)
+		if err != nil {
+			t.Errorf("unable to unmarshal frame msg: %v", err)
+			continue
+		}
+		if msg.GetId() == nil {
+			t.Error("frame msg has not Id")
+		}
+		if len(msg.Frame) < 10 {
+			t.Errorf("[%v] invalid frame image: %v", msg.Id, msg.GetFrame())
+		}
+	}
+}
+
+type ConnMock struct {
+	ln     net.Listener
+	conn   net.Conn
+	muWriter sync.Mutex
+	writer *bufio.Writer
+}
+
+func (c *ConnMock) WriteMsg(p string) (err error) {
+	c.muWriter.Lock()
+	defer c.muWriter.Unlock()
+	_, err = c.writer.WriteString(p + "\n")
+	if err != nil {
+		log.Errorf("unable to write response: %v", err)
+	}
+	if err == io.EOF {
+		log.Info("Connection closed")
+		return err
+	}
+	err = c.writer.Flush()
+	return err
+}
+
+func (c *ConnMock) Listen() error {
+	c.muWriter.Lock()
+	defer c.muWriter.Unlock()
+	ln, err := net.Listen("tcp", "127.0.0.1:")
+	c.ln = ln
+	if err != nil {
+
+		return fmt.Errorf("unable to listen on port: %v", err)
+	}
+
+	go func() {
+		for {
+			c.conn, err = c.ln.Accept()
+			if err != nil && err == io.EOF {
+				log.Infof("connection close: %v", err)
+				break
+			}
+			c.writer = bufio.NewWriter(c.conn)
+		}
+	}()
+	return nil
+}
+
+func (c *ConnMock) Addr() string {
+	return c.ln.Addr().String()
+}
+
+func (c *ConnMock) Close() error {
+	log.Infof("close mock server")
+	err := c.ln.Close()
+	if err != nil {
+		return fmt.Errorf("unable to close mock server: %v", err)
+	}
+	return nil
+}

cmd/rc-simulator/rc-simultator.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"flag"
+	"github.com/cyrilix/robocar-base/cli"
+	"github.com/cyrilix/robocar-simulator/camera"
+	"log"
+	"os"
+)
+
+const DefaultClientId = "robocar-camera"
+
+func main() {
+	var mqttBroker, username, password, clientId, topicBase string
+	var address string
+
+	mqttQos := cli.InitIntFlag("MQTT_QOS", 0)
+	_, mqttRetain := os.LookupEnv("MQTT_RETAIN")
+
+	cli.InitMqttFlags(DefaultClientId, &mqttBroker, &username, &password, &clientId, &mqttQos, &mqttRetain)
+
+	flag.StringVar(&topicBase, "mqtt-topic", os.Getenv("MQTT_TOPIC"), "Mqtt topic to publish camera frames, use MQTT_TOPIC if args not set")
+	flag.StringVar(&address, "simulator-address", "127.0.0.1:9091", "Simulator address")
+
+	flag.Parse()
+	if len(os.Args) <= 1 {
+		flag.PrintDefaults()
+		os.Exit(1)
+	}
+
+	client, err := cli.Connect(mqttBroker, username, password, clientId)
+	if err != nil {
+		log.Fatalf("unable to connect to mqtt broker: %v", err)
+	}
+	defer client.Disconnect(10)
+
+
+	c := camera.New(camera.NewMqttPublisher(client, topicBase), address)
+	defer c.Stop()
+
+	cli.HandleExit(c)
+
+	err = c.Start()
+	if err != nil {
+		log.Fatalf("unable to start service: %v", err)
+	}
+}

go.mod

@@ -0,0 +1,12 @@
+module github.com/cyrilix/robocar-simulator
+
+go 1.15
+
+require (
+	github.com/avast/retry-go v2.6.0+incompatible
+	github.com/cyrilix/robocar-base v0.1.1
+	github.com/cyrilix/robocar-protobuf/go v1.0.1
+	github.com/eclipse/paho.mqtt.golang v1.2.0
+	github.com/golang/protobuf v1.4.2
+	github.com/sirupsen/logrus v1.6.0
+)

go.sum

@@ -0,0 +1,145 @@
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simulator/simulator.go.go

@@ -0,0 +1,15 @@
+package simulator
+
+type SimulatorMsg struct {
+	MsgType       string  `json:"msg_type"`
+	SteeringAngle float64 `json:"steering_angle"`
+	Throttle      float64 `json:"throttle"`
+	Speed         float64 `json:"speed"`
+	Image         []byte  `json:"image"`
+	Hit           string  `json:"hit"`
+	PosX          float64 `json:"pos_x"`
+	PosY          float64 `json:"posy"`
+	PosZ          float64 `json:"pos_z"`
+	Time          float64 `json:"time"`
+	Cte           float64 `json:"cte"`
+}

vendor/github.com/avast/retry-go/.gitignore

@@ -0,0 +1,21 @@
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+
+# dep
+vendor/
+Gopkg.lock
+
+# cover
+coverage.txt

vendor/github.com/avast/retry-go/.godocdown.tmpl

@@ -0,0 +1,37 @@
+# {{ .Name }}
+
+[![Release](https://img.shields.io/github/release/avast/retry-go.svg?style=flat-square)](https://github.com/avast/retry-go/releases/latest)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
+[![Travis](https://img.shields.io/travis/avast/retry-go.svg?style=flat-square)](https://travis-ci.org/avast/retry-go)
+[![AppVeyor](https://ci.appveyor.com/api/projects/status/fieg9gon3qlq0a9a?svg=true)](https://ci.appveyor.com/project/JaSei/retry-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/avast/retry-go?style=flat-square)](https://goreportcard.com/report/github.com/avast/retry-go)
+[![GoDoc](https://godoc.org/github.com/avast/retry-go?status.svg&style=flat-square)](http://godoc.org/github.com/avast/retry-go)
+[![codecov.io](https://codecov.io/github/avast/retry-go/coverage.svg?branch=master)](https://codecov.io/github/avast/retry-go?branch=master)
+[![Sourcegraph](https://sourcegraph.com/github.com/avast/retry-go/-/badge.svg)](https://sourcegraph.com/github.com/avast/retry-go?badge)
+
+{{ .EmitSynopsis }}
+
+{{ .EmitUsage }}
+
+## Contributing
+
+Contributions are very much welcome.
+
+### Makefile
+
+Makefile provides several handy rules, like README.md `generator` , `setup` for prepare build/dev environment, `test`, `cover`, etc...
+
+Try `make help` for more information.
+
+### Before pull request
+
+please try:
+* run tests (`make test`)
+* run linter (`make lint`)
+* if your IDE don't automaticaly do `go fmt`, run `go fmt` (`make fmt`)
+
+### README
+
+README.md are generate from template [.godocdown.tmpl](.godocdown.tmpl) and code documentation via [godocdown](https://github.com/robertkrimen/godocdown).
+
+Never edit README.md direct, because your change will be lost.

vendor/github.com/avast/retry-go/.travis.yml

@@ -0,0 +1,19 @@
+language: go
+
+go:
+  - 1.6
+  - 1.7
+  - 1.8
+  - 1.9
+  - "1.10"
+  - 1.11
+  - 1.12
+
+install:
+  - make setup
+
+script:
+  - make ci
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/avast/retry-go/Gopkg.toml

@@ -0,0 +1,3 @@
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"

vendor/github.com/avast/retry-go/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Avast
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/avast/retry-go/Makefile

@@ -0,0 +1,65 @@
+SOURCE_FILES?=$$(go list ./... | grep -v /vendor/)
+TEST_PATTERN?=.
+TEST_OPTIONS?=
+DEP?=$$(which dep)
+VERSION?=$$(cat VERSION)
+LINTER?=$$(which golangci-lint)
+LINTER_VERSION=1.15.0
+
+ifeq ($(OS),Windows_NT)
+	DEP_VERS=dep-windows-amd64
+	LINTER_FILE=golangci-lint-$(LINTER_VERSION)-windows-amd64.zip
+	LINTER_UNPACK= >| app.zip; unzip -j app.zip -d $$GOPATH/bin; rm app.zip
+else ifeq ($(OS), Darwin)
+	LINTER_FILE=golangci-lint-$(LINTER_VERSION)-darwin-amd64.tar.gz
+	LINTER_UNPACK= | tar xzf - -C $$GOPATH/bin --wildcards --strip 1 "**/golangci-lint"
+else
+	DEP_VERS=dep-linux-amd64
+	LINTER_FILE=golangci-lint-$(LINTER_VERSION)-linux-amd64.tar.gz
+	LINTER_UNPACK= | tar xzf - -C $$GOPATH/bin --wildcards --strip 1 "**/golangci-lint"
+endif
+
+setup:
+	go get -u github.com/pierrre/gotestcover
+	go get -u golang.org/x/tools/cmd/cover
+	go get -u github.com/robertkrimen/godocdown/godocdown
+	@if [ "$(LINTER)" = "" ]; then\
+		curl -L https://github.com/golangci/golangci-lint/releases/download/v$(LINTER_VERSION)/$(LINTER_FILE) $(LINTER_UNPACK) ;\
+		chmod +x $$GOPATH/bin/golangci-lint;\
+	fi
+	@if [ "$(DEP)" = "" ]; then\
+		curl -L https://github.com/golang/dep/releases/download/v0.3.1/$(DEP_VERS) >| $$GOPATH/bin/dep;\
+		chmod +x $$GOPATH/bin/dep;\
+	fi
+	dep ensure
+
+generate: ## Generate README.md
+	godocdown >| README.md
+
+test: generate test_and_cover_report lint
+
+test_and_cover_report:
+	gotestcover $(TEST_OPTIONS) -covermode=atomic -coverprofile=coverage.txt $(SOURCE_FILES) -run $(TEST_PATTERN) -timeout=2m
+
+cover: test ## Run all the tests and opens the coverage report
+	go tool cover -html=coverage.txt
+
+fmt: ## gofmt and goimports all go files
+	find . -name '*.go' -not -wholename './vendor/*' | while read -r file; do gofmt -w -s "$$file"; goimports -w "$$file"; done
+
+lint: ## Run all the linters
+	golangci-lint run
+
+ci: test_and_cover_report ## Run all the tests but no linters - use https://golangci.com integration instead
+
+build:
+	go build
+
+release: ## Release new version
+	git tag | grep -q $(VERSION) && echo This version was released! Increase VERSION! || git tag $(VERSION) && git push origin $(VERSION) && git tag v$(VERSION) && git push origin v$(VERSION)
+
+# Absolutely awesome: http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+help:
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.DEFAULT_GOAL := build

vendor/github.com/avast/retry-go/README.md

@@ -0,0 +1,332 @@
+# retry
+
+[![Release](https://img.shields.io/github/release/avast/retry-go.svg?style=flat-square)](https://github.com/avast/retry-go/releases/latest)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
+[![Travis](https://img.shields.io/travis/avast/retry-go.svg?style=flat-square)](https://travis-ci.org/avast/retry-go)
+[![AppVeyor](https://ci.appveyor.com/api/projects/status/fieg9gon3qlq0a9a?svg=true)](https://ci.appveyor.com/project/JaSei/retry-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/avast/retry-go?style=flat-square)](https://goreportcard.com/report/github.com/avast/retry-go)
+[![GoDoc](https://godoc.org/github.com/avast/retry-go?status.svg&style=flat-square)](http://godoc.org/github.com/avast/retry-go)
+[![codecov.io](https://codecov.io/github/avast/retry-go/coverage.svg?branch=master)](https://codecov.io/github/avast/retry-go?branch=master)
+[![Sourcegraph](https://sourcegraph.com/github.com/avast/retry-go/-/badge.svg)](https://sourcegraph.com/github.com/avast/retry-go?badge)
+
+Simple library for retry mechanism
+
+slightly inspired by
+[Try::Tiny::Retry](https://metacpan.org/pod/Try::Tiny::Retry)
+
+
+### SYNOPSIS
+
+http get with retry:
+
+    url := "http://example.com"
+    var body []byte
+
+    err := retry.Do(
+    	func() error {
+    		resp, err := http.Get(url)
+    		if err != nil {
+    			return err
+    		}
+    		defer resp.Body.Close()
+    		body, err = ioutil.ReadAll(resp.Body)
+    		if err != nil {
+    			return err
+    		}
+
+    		return nil
+    	},
+    )
+
+    fmt.Println(body)
+
+[next examples](https://github.com/avast/retry-go/tree/master/examples)
+
+
+### SEE ALSO
+
+* [giantswarm/retry-go](https://github.com/giantswarm/retry-go) - slightly
+complicated interface.
+
+* [sethgrid/pester](https://github.com/sethgrid/pester) - only http retry for
+http calls with retries and backoff
+
+* [cenkalti/backoff](https://github.com/cenkalti/backoff) - Go port of the
+exponential backoff algorithm from Google's HTTP Client Library for Java. Really
+complicated interface.
+
+* [rafaeljesus/retry-go](https://github.com/rafaeljesus/retry-go) - looks good,
+slightly similar as this package, don't have 'simple' `Retry` method
+
+* [matryer/try](https://github.com/matryer/try) - very popular package,
+nonintuitive interface (for me)
+
+
+### BREAKING CHANGES
+
+1.0.2 -> 2.0.0
+
+* argument of `retry.Delay` is final delay (no multiplication by `retry.Units`
+anymore)
+
+* function `retry.Units` are removed
+
+* [more about this breaking change](https://github.com/avast/retry-go/issues/7)
+
+0.3.0 -> 1.0.0
+
+* `retry.Retry` function are changed to `retry.Do` function
+
+* `retry.RetryCustom` (OnRetry) and `retry.RetryCustomWithOpts` functions are
+now implement via functions produces Options (aka `retry.OnRetry`)
+
+## Usage
+
+```go
+var (
+	DefaultAttempts      = uint(10)
+	DefaultDelay         = 100 * time.Millisecond
+	DefaultMaxJitter     = 100 * time.Millisecond
+	DefaultOnRetry       = func(n uint, err error) {}
+	DefaultRetryIf       = IsRecoverable
+	DefaultDelayType     = CombineDelay(BackOffDelay, RandomDelay)
+	DefaultLastErrorOnly = false
+)
+```
+
+#### func  BackOffDelay
+
+```go
+func BackOffDelay(n uint, config *Config) time.Duration
+```
+BackOffDelay is a DelayType which increases delay between consecutive retries
+
+#### func  Do
+
+```go
+func Do(retryableFunc RetryableFunc, opts ...Option) error
+```
+
+#### func  FixedDelay
+
+```go
+func FixedDelay(_ uint, config *Config) time.Duration
+```
+FixedDelay is a DelayType which keeps delay the same through all iterations
+
+#### func  IsRecoverable
+
+```go
+func IsRecoverable(err error) bool
+```
+IsRecoverable checks if error is an instance of `unrecoverableError`
+
+#### func  RandomDelay
+
+```go
+func RandomDelay(_ uint, config *Config) time.Duration
+```
+RandomDelay is a DelayType which picks a random delay up to config.maxJitter
+
+#### func  Unrecoverable
+
+```go
+func Unrecoverable(err error) error
+```
+Unrecoverable wraps an error in `unrecoverableError` struct
+
+#### type Config
+
+```go
+type Config struct {
+}
+```
+
+
+#### type DelayTypeFunc
+
+```go
+type DelayTypeFunc func(n uint, config *Config) time.Duration
+```
+
+
+#### func  CombineDelay
+
+```go
+func CombineDelay(delays ...DelayTypeFunc) DelayTypeFunc
+```
+CombineDelay is a DelayType the combines all of the specified delays into a new
+DelayTypeFunc
+
+#### type Error
+
+```go
+type Error []error
+```
+
+Error type represents list of errors in retry
+
+#### func (Error) Error
+
+```go
+func (e Error) Error() string
+```
+Error method return string representation of Error It is an implementation of
+error interface
+
+#### func (Error) WrappedErrors
+
+```go
+func (e Error) WrappedErrors() []error
+```
+WrappedErrors returns the list of errors that this Error is wrapping. It is an
+implementation of the `errwrap.Wrapper` interface in package
+[errwrap](https://github.com/hashicorp/errwrap) so that `retry.Error` can be
+used with that library.
+
+#### type OnRetryFunc
+
+```go
+type OnRetryFunc func(n uint, err error)
+```
+
+Function signature of OnRetry function n = count of attempts
+
+#### type Option
+
+```go
+type Option func(*Config)
+```
+
+Option represents an option for retry.
+
+#### func  Attempts
+
+```go
+func Attempts(attempts uint) Option
+```
+Attempts set count of retry default is 10
+
+#### func  Delay
+
+```go
+func Delay(delay time.Duration) Option
+```
+Delay set delay between retry default is 100ms
+
+#### func  DelayType
+
+```go
+func DelayType(delayType DelayTypeFunc) Option
+```
+DelayType set type of the delay between retries default is BackOff
+
+#### func  LastErrorOnly
+
+```go
+func LastErrorOnly(lastErrorOnly bool) Option
+```
+return the direct last error that came from the retried function default is
+false (return wrapped errors with everything)
+
+#### func  MaxDelay
+
+```go
+func MaxDelay(maxDelay time.Duration) Option
+```
+MaxDelay set maximum delay between retry does not apply by default
+
+#### func  MaxJitter
+
+```go
+func MaxJitter(maxJitter time.Duration) Option
+```
+MaxJitter sets the maximum random Jitter between retries for RandomDelay
+
+#### func  OnRetry
+
+```go
+func OnRetry(onRetry OnRetryFunc) Option
+```
+OnRetry function callback are called each retry
+
+log each retry example:
+
+    retry.Do(
+    	func() error {
+    		return errors.New("some error")
+    	},
+    	retry.OnRetry(func(n uint, err error) {
+    		log.Printf("#%d: %s\n", n, err)
+    	}),
+    )
+
+#### func  RetryIf
+
+```go
+func RetryIf(retryIf RetryIfFunc) Option
+```
+RetryIf controls whether a retry should be attempted after an error (assuming
+there are any retry attempts remaining)
+
+skip retry if special error example:
+
+    retry.Do(
+    	func() error {
+    		return errors.New("special error")
+    	},
+    	retry.RetryIf(func(err error) bool {
+    		if err.Error() == "special error" {
+    			return false
+    		}
+    		return true
+    	})
+    )
+
+By default RetryIf stops execution if the error is wrapped using
+`retry.Unrecoverable`, so above example may also be shortened to:
+
+    retry.Do(
+    	func() error {
+    		return retry.Unrecoverable(errors.New("special error"))
+    	}
+    )
+
+#### type RetryIfFunc
+
+```go
+type RetryIfFunc func(error) bool
+```
+
+Function signature of retry if function
+
+#### type RetryableFunc
+
+```go
+type RetryableFunc func() error
+```
+
+Function signature of retryable function
+
+## Contributing
+
+Contributions are very much welcome.
+
+### Makefile
+
+Makefile provides several handy rules, like README.md `generator` , `setup` for prepare build/dev environment, `test`, `cover`, etc...
+
+Try `make help` for more information.
+
+### Before pull request
+
+please try:
+* run tests (`make test`)
+* run linter (`make lint`)
+* if your IDE don't automaticaly do `go fmt`, run `go fmt` (`make fmt`)
+
+### README
+
+README.md are generate from template [.godocdown.tmpl](.godocdown.tmpl) and code documentation via [godocdown](https://github.com/robertkrimen/godocdown).
+
+Never edit README.md direct, because your change will be lost.

vendor/github.com/avast/retry-go/VERSION

@@ -0,0 +1 @@
+2.6.0

vendor/github.com/avast/retry-go/appveyor.yml

@@ -0,0 +1,19 @@
+version: "{build}"
+
+clone_folder: c:\Users\appveyor\go\src\github.com\avast\retry-go
+
+#os: Windows Server 2012 R2
+platform: x64
+
+install:
+  - copy c:\MinGW\bin\mingw32-make.exe c:\MinGW\bin\make.exe
+  - set GOPATH=C:\Users\appveyor\go
+  - set PATH=%PATH%;c:\MinGW\bin
+  - set PATH=%PATH%;%GOPATH%\bin;c:\go\bin
+  - set GOBIN=%GOPATH%\bin
+  - go version
+  - go env
+  - make setup
+
+build_script:
+  - make ci

vendor/github.com/avast/retry-go/options.go

@@ -0,0 +1,151 @@
+package retry
+
+import (
+	"math/rand"
+	"time"
+)
+
+// Function signature of retry if function
+type RetryIfFunc func(error) bool
+
+// Function signature of OnRetry function
+// n = count of attempts
+type OnRetryFunc func(n uint, err error)
+
+type DelayTypeFunc func(n uint, config *Config) time.Duration
+
+type Config struct {
+	attempts      uint
+	delay         time.Duration
+	maxDelay      time.Duration
+	maxJitter     time.Duration
+	onRetry       OnRetryFunc
+	retryIf       RetryIfFunc
+	delayType     DelayTypeFunc
+	lastErrorOnly bool
+}
+
+// Option represents an option for retry.
+type Option func(*Config)
+
+// return the direct last error that came from the retried function
+// default is false (return wrapped errors with everything)
+func LastErrorOnly(lastErrorOnly bool) Option {
+	return func(c *Config) {
+		c.lastErrorOnly = lastErrorOnly
+	}
+}
+
+// Attempts set count of retry
+// default is 10
+func Attempts(attempts uint) Option {
+	return func(c *Config) {
+		c.attempts = attempts
+	}
+}
+
+// Delay set delay between retry
+// default is 100ms
+func Delay(delay time.Duration) Option {
+	return func(c *Config) {
+		c.delay = delay
+	}
+}
+
+// MaxDelay set maximum delay between retry
+// does not apply by default
+func MaxDelay(maxDelay time.Duration) Option {
+	return func(c *Config) {
+		c.maxDelay = maxDelay
+	}
+}
+
+// MaxJitter sets the maximum random Jitter between retries for RandomDelay
+func MaxJitter(maxJitter time.Duration) Option {
+	return func(c *Config) {
+		c.maxJitter = maxJitter
+	}
+}
+
+// DelayType set type of the delay between retries
+// default is BackOff
+func DelayType(delayType DelayTypeFunc) Option {
+	return func(c *Config) {
+		c.delayType = delayType
+	}
+}
+
+// BackOffDelay is a DelayType which increases delay between consecutive retries
+func BackOffDelay(n uint, config *Config) time.Duration {
+	return config.delay * (1 << n)
+}
+
+// FixedDelay is a DelayType which keeps delay the same through all iterations
+func FixedDelay(_ uint, config *Config) time.Duration {
+	return config.delay
+}
+
+// RandomDelay is a DelayType which picks a random delay up to config.maxJitter
+func RandomDelay(_ uint, config *Config) time.Duration {
+	return time.Duration(rand.Int63n(int64(config.maxJitter)))
+}
+
+// CombineDelay is a DelayType the combines all of the specified delays into a new DelayTypeFunc
+func CombineDelay(delays ...DelayTypeFunc) DelayTypeFunc {
+	return func(n uint, config *Config) time.Duration {
+		var total time.Duration
+		for _, delay := range delays {
+			total += delay(n, config)
+		}
+		return total
+	}
+}
+
+// OnRetry function callback are called each retry
+//
+// log each retry example:
+//
+//	retry.Do(
+//		func() error {
+//			return errors.New("some error")
+//		},
+//		retry.OnRetry(func(n uint, err error) {
+//			log.Printf("#%d: %s\n", n, err)
+//		}),
+//	)
+func OnRetry(onRetry OnRetryFunc) Option {
+	return func(c *Config) {
+		c.onRetry = onRetry
+	}
+}
+
+// RetryIf controls whether a retry should be attempted after an error
+// (assuming there are any retry attempts remaining)
+//
+// skip retry if special error example:
+//
+//	retry.Do(
+//		func() error {
+//			return errors.New("special error")
+//		},
+//		retry.RetryIf(func(err error) bool {
+//			if err.Error() == "special error" {
+//				return false
+//			}
+//			return true
+//		})
+//	)
+//
+// By default RetryIf stops execution if the error is wrapped using `retry.Unrecoverable`,
+// so above example may also be shortened to:
+//
+//	retry.Do(
+//		func() error {
+//			return retry.Unrecoverable(errors.New("special error"))
+//		}
+//	)
+func RetryIf(retryIf RetryIfFunc) Option {
+	return func(c *Config) {
+		c.retryIf = retryIf
+	}
+}

vendor/github.com/avast/retry-go/retry.go

@@ -0,0 +1,206 @@
+/*
+Simple library for retry mechanism
+
+slightly inspired by [Try::Tiny::Retry](https://metacpan.org/pod/Try::Tiny::Retry)
+
+SYNOPSIS
+
+http get with retry:
+
+	url := "http://example.com"
+	var body []byte
+
+	err := retry.Do(
+		func() error {
+			resp, err := http.Get(url)
+			if err != nil {
+				return err
+			}
+			defer resp.Body.Close()
+			body, err = ioutil.ReadAll(resp.Body)
+			if err != nil {
+				return err
+			}
+
+			return nil
+		},
+	)
+
+	fmt.Println(body)
+
+[next examples](https://github.com/avast/retry-go/tree/master/examples)
+
+
+SEE ALSO
+
+* [giantswarm/retry-go](https://github.com/giantswarm/retry-go) - slightly complicated interface.
+
+* [sethgrid/pester](https://github.com/sethgrid/pester) - only http retry for http calls with retries and backoff
+
+* [cenkalti/backoff](https://github.com/cenkalti/backoff) - Go port of the exponential backoff algorithm from Google's HTTP Client Library for Java. Really complicated interface.
+
+* [rafaeljesus/retry-go](https://github.com/rafaeljesus/retry-go) - looks good, slightly similar as this package, don't have 'simple' `Retry` method
+
+* [matryer/try](https://github.com/matryer/try) - very popular package, nonintuitive interface (for me)
+
+BREAKING CHANGES
+
+1.0.2 -> 2.0.0
+
+* argument of `retry.Delay` is final delay (no multiplication by `retry.Units` anymore)
+
+* function `retry.Units` are removed
+
+* [more about this breaking change](https://github.com/avast/retry-go/issues/7)
+
+
+0.3.0 -> 1.0.0
+
+* `retry.Retry` function are changed to `retry.Do` function
+
+* `retry.RetryCustom` (OnRetry) and `retry.RetryCustomWithOpts` functions are now implement via functions produces Options (aka `retry.OnRetry`)
+
+
+*/
+package retry
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// Function signature of retryable function
+type RetryableFunc func() error
+
+var (
+	DefaultAttempts      = uint(10)
+	DefaultDelay         = 100 * time.Millisecond
+	DefaultMaxJitter     = 100 * time.Millisecond
+	DefaultOnRetry       = func(n uint, err error) {}
+	DefaultRetryIf       = IsRecoverable
+	DefaultDelayType     = CombineDelay(BackOffDelay, RandomDelay)
+	DefaultLastErrorOnly = false
+)
+
+func Do(retryableFunc RetryableFunc, opts ...Option) error {
+	var n uint
+
+	//default
+	config := &Config{
+		attempts:      DefaultAttempts,
+		delay:         DefaultDelay,
+		maxJitter:     DefaultMaxJitter,
+		onRetry:       DefaultOnRetry,
+		retryIf:       DefaultRetryIf,
+		delayType:     DefaultDelayType,
+		lastErrorOnly: DefaultLastErrorOnly,
+	}
+
+	//apply opts
+	for _, opt := range opts {
+		opt(config)
+	}
+
+	var errorLog Error
+	if !config.lastErrorOnly {
+		errorLog = make(Error, config.attempts)
+	} else {
+		errorLog = make(Error, 1)
+	}
+
+	lastErrIndex := n
+	for n < config.attempts {
+		err := retryableFunc()
+
+		if err != nil {
+			errorLog[lastErrIndex] = unpackUnrecoverable(err)
+
+			if !config.retryIf(err) {
+				break
+			}
+
+			config.onRetry(n, err)
+
+			// if this is last attempt - don't wait
+			if n == config.attempts-1 {
+				break
+			}
+
+			delayTime := config.delayType(n, config)
+			if config.maxDelay > 0 && delayTime > config.maxDelay {
+				delayTime = config.maxDelay
+			}
+			time.Sleep(delayTime)
+		} else {
+			return nil
+		}
+
+		n++
+		if !config.lastErrorOnly {
+			lastErrIndex = n
+		}
+	}
+
+	if config.lastErrorOnly {
+		return errorLog[lastErrIndex]
+	}
+	return errorLog
+}
+
+// Error type represents list of errors in retry
+type Error []error
+
+// Error method return string representation of Error
+// It is an implementation of error interface
+func (e Error) Error() string {
+	logWithNumber := make([]string, lenWithoutNil(e))
+	for i, l := range e {
+		if l != nil {
+			logWithNumber[i] = fmt.Sprintf("#%d: %s", i+1, l.Error())
+		}
+	}
+
+	return fmt.Sprintf("All attempts fail:\n%s", strings.Join(logWithNumber, "\n"))
+}
+
+func lenWithoutNil(e Error) (count int) {
+	for _, v := range e {
+		if v != nil {
+			count++
+		}
+	}
+
+	return
+}
+
+// WrappedErrors returns the list of errors that this Error is wrapping.
+// It is an implementation of the `errwrap.Wrapper` interface
+// in package [errwrap](https://github.com/hashicorp/errwrap) so that
+// `retry.Error` can be used with that library.
+func (e Error) WrappedErrors() []error {
+	return e
+}
+
+type unrecoverableError struct {
+	error
+}
+
+// Unrecoverable wraps an error in `unrecoverableError` struct
+func Unrecoverable(err error) error {
+	return unrecoverableError{err}
+}
+
+// IsRecoverable checks if error is an instance of `unrecoverableError`
+func IsRecoverable(err error) bool {
+	_, isUnrecoverable := err.(unrecoverableError)
+	return !isUnrecoverable
+}
+
+func unpackUnrecoverable(err error) error {
+	if unrecoverable, isUnrecoverable := err.(unrecoverableError); isUnrecoverable {
+		return unrecoverable.error
+	}
+
+	return err
+}

vendor/github.com/cyrilix/robocar-base/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/cyrilix/robocar-base/cli/cli.go

@@ -0,0 +1,119 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"github.com/cyrilix/robocar-base/service"
+	MQTT "github.com/eclipse/paho.mqtt.golang"
+	"log"
+	"os"
+	"os/signal"
+	"strconv"
+	"syscall"
+)
+
+func SetDefaultValueFromEnv(value *string, key string, defaultValue string) {
+	if os.Getenv(key) != "" {
+		*value = os.Getenv(key)
+	} else {
+		*value = defaultValue
+	}
+}
+func SetIntDefaultValueFromEnv(value *int, key string, defaultValue int) error {
+	var sVal string
+	if os.Getenv(key) != "" {
+		sVal = os.Getenv(key)
+		val, err := strconv.Atoi(sVal)
+		if err != nil {
+			log.Printf("unable to convert string to int: %v", err)
+			return err
+		}
+		*value = val
+	} else {
+		*value = defaultValue
+	}
+	return nil
+}
+func SetFloat64DefaultValueFromEnv(value *float64, key string, defaultValue float64) error {
+	var sVal string
+	if os.Getenv(key) != "" {
+		sVal = os.Getenv(key)
+		val, err := strconv.ParseFloat(sVal, 64)
+		if err != nil {
+			log.Printf("unable to convert string to float: %v", err)
+			return err
+		}
+		*value = val
+	} else {
+		*value = defaultValue
+	}
+	return nil
+}
+
+func HandleExit(p service.Part) {
+	signals := make(chan os.Signal, 1)
+	signal.Notify(signals, os.Kill, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		<-signals
+		p.Stop()
+		os.Exit(0)
+	}()
+}
+
+func InitMqttFlagSet(flagSet *flag.FlagSet, defaultClientId string, mqttBroker, username, password, clientId *string, mqttQos *int, mqttRetain *bool) {
+	SetDefaultValueFromEnv(clientId, "MQTT_CLIENT_ID", defaultClientId)
+	SetDefaultValueFromEnv(mqttBroker, "MQTT_BROKER", "tcp://127.0.0.1:1883")
+
+	flagSet.StringVar(mqttBroker, "mqtt-broker", *mqttBroker, "Broker Uri, use MQTT_BROKER env if arg not set")
+	flagSet.StringVar(username, "mqtt-username", os.Getenv("MQTT_USERNAME"), "Broker Username, use MQTT_USERNAME env if arg not set")
+	flagSet.StringVar(password, "mqtt-password", os.Getenv("MQTT_PASSWORD"), "Broker Password, MQTT_PASSWORD env if args not set")
+	flagSet.StringVar(clientId, "mqtt-client-id", *clientId, "Mqtt client id, use MQTT_CLIENT_ID env if args not set")
+	flagSet.IntVar(mqttQos, "mqtt-qos", *mqttQos, "Qos to pusblish message, use MQTT_QOS env if arg not set")
+	flagSet.BoolVar(mqttRetain, "mqtt-retain", *mqttRetain, "Retain mqtt message, if not set, true if MQTT_RETAIN env variable is set")
+}
+
+func InitMqttFlags(defaultClientId string, mqttBroker, username, password, clientId *string, mqttQos *int, mqttRetain *bool) {
+	InitMqttFlagSet(flag.CommandLine, defaultClientId, mqttBroker, username, password, clientId, mqttQos, mqttRetain)
+}
+
+func InitIntFlag(key string, defValue int) int {
+	var value int
+	err := SetIntDefaultValueFromEnv(&value, key, defValue)
+	if err != nil {
+		log.Panicf("invalid int value: %v", err)
+	}
+	return value
+}
+
+func InitFloat64Flag(key string, defValue float64) float64 {
+	var value float64
+	err := SetFloat64DefaultValueFromEnv(&value, key, defValue)
+	if err != nil {
+		log.Panicf("invalid value: %v", err)
+	}
+	return value
+}
+
+func Connect(uri, username, password, clientId string) (MQTT.Client, error) {
+	//create a ClientOptions struct setting the broker address, clientid, turn
+	//off trace output and set the default message handler
+	opts := MQTT.NewClientOptions().AddBroker(uri)
+	opts.SetUsername(username)
+	opts.SetPassword(password)
+	opts.SetClientID(clientId)
+	opts.SetAutoReconnect(true)
+	opts.SetDefaultPublishHandler(
+		//define a function for the default message handler
+		func(client MQTT.Client, msg MQTT.Message) {
+			fmt.Printf("TOPIC: %s\n", msg.Topic())
+			fmt.Printf("MSG: %s\n", msg.Payload())
+		})
+
+	//create and start a client using the above ClientOptions
+	client := MQTT.NewClient(opts)
+	if token := client.Connect(); token.Wait() && token.Error() != nil {
+		return nil, fmt.Errorf("unable to connect to mqtt bus: %v", token.Error())
+	}
+	return client, nil
+}

vendor/github.com/cyrilix/robocar-base/service/part.go

@@ -0,0 +1,33 @@
+package service
+
+import (
+	"fmt"
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"log"
+)
+
+func StopService(name string, client mqtt.Client, topics ...string) {
+	log.Printf("Stop %s service", name)
+	token := client.Unsubscribe(topics...)
+	token.Wait()
+	if token.Error() != nil {
+		log.Printf("unable to unsubscribe service: %v", token.Error())
+	}
+	client.Disconnect(50)
+}
+
+func RegisterCallback(client mqtt.Client, topic string, callback mqtt.MessageHandler) error {
+	log.Printf("Register callback on topic %v", topic)
+	token := client.Subscribe(topic, 0, callback)
+	token.Wait()
+	if token.Error() != nil {
+		return fmt.Errorf("unable to register callback on topic %s: %v", topic, token.Error())
+	}
+	return nil
+}
+
+type Part interface {
+	Start() error
+	Stop()
+}
+

vendor/github.com/cyrilix/robocar-protobuf/go/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/eclipse/paho.mqtt.golang/.gitignore

@@ -0,0 +1,36 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+
+*.msg
+*.lok
+
+samples/trivial
+samples/trivial2
+samples/sample
+samples/reconnect
+samples/ssl
+samples/custom_store
+samples/simple
+samples/stdinpub
+samples/stdoutsub
+samples/routing

vendor/github.com/eclipse/paho.mqtt.golang/CONTRIBUTING.md

@@ -0,0 +1,56 @@
+Contributing to Paho
+====================
+
+Thanks for your interest in this project.
+
+Project description:
+--------------------
+
+The Paho project has been created to provide scalable open-source implementations of open and standard messaging protocols aimed at new, existing, and emerging applications for Machine-to-Machine (M2M) and Internet of Things (IoT).
+Paho reflects the inherent physical and cost constraints of device connectivity. Its objectives include effective levels of decoupling between devices and applications, designed to keep markets open and encourage the rapid growth of scalable Web and Enterprise middleware and applications. Paho is being kicked off with MQTT publish/subscribe client implementations for use on embedded platforms, along with corresponding server support as determined by the community.
+
+- https://projects.eclipse.org/projects/technology.paho
+
+Developer resources:
+--------------------
+
+Information regarding source code management, builds, coding standards, and more.
+
+- https://projects.eclipse.org/projects/technology.paho/developer
+
+Contributor License Agreement:
+------------------------------
+
+Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (CLA).
+
+- http://www.eclipse.org/legal/CLA.php
+
+Contributing Code:
+------------------
+
+The Go client is developed in Github, see their documentation on the process of forking and pull requests; https://help.github.com/categories/collaborating-on-projects-using-pull-requests/
+
+Git commit messages should follow the style described here;
+
+http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
+
+Contact:
+--------
+
+Contact the project developers via the project's "dev" list.
+
+- https://dev.eclipse.org/mailman/listinfo/paho-dev
+
+Search for bugs:
+----------------
+
+This project uses Github issues to track ongoing development and issues.
+
+- https://github.com/eclipse/paho.mqtt.golang/issues
+
+Create a new bug:
+-----------------
+
+Be sure to search for existing bugs before you create another one. Remember that contributions are always welcome!
+
+- https://github.com/eclipse/paho.mqtt.golang/issues

vendor/github.com/eclipse/paho.mqtt.golang/DISTRIBUTION

@@ -0,0 +1,15 @@
+
+
+Eclipse Distribution License - v 1.0
+
+Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors.
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    Neither the name of the Eclipse Foundation, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/eclipse/paho.mqtt.golang/LICENSE

@@ -0,0 +1,87 @@
+Eclipse Public License - v 1.0
+
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+1. DEFINITIONS
+
+"Contribution" means:
+
+a) in the case of the initial Contributor, the initial code and documentation distributed under this Agreement, and
+
+b) in the case of each subsequent Contributor:
+
+i) changes to the Program, and
+
+ii) additions to the Program;
+
+where such changes and/or additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or anyone acting on such Contributor's behalf. Contributions do not include additions to the Program which: (i) are separate modules of software distributed in conjunction with the Program under their own license agreement, and (ii) are not derivative works of the Program.
+
+"Contributor" means any person or entity that distributes the Program.
+
+"Licensed Patents" mean patent claims licensable by a Contributor which are necessarily infringed by the use or sale of its Contribution alone or when combined with the Program.
+
+"Program" means the Contributions distributed in accordance with this Agreement.
+
+"Recipient" means anyone who receives the Program under this Agreement, including all Contributors.
+
+2. GRANT OF RIGHTS
+
+a) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, distribute and sublicense the Contribution of such Contributor, if any, and such derivative works, in source code and object code form.
+
+b) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free patent license under Licensed Patents to make, use, sell, offer to sell, import and otherwise transfer the Contribution of such Contributor, if any, in source code and object code form. This patent license shall apply to the combination of the Contribution and the Program if, at the time the Contribution is added by the Contributor, such addition of the Contribution causes such combination to be covered by the Licensed Patents. The patent license shall not apply to any other combinations which include the Contribution. No hardware per se is licensed hereunder.
+
+c) Recipient understands that although each Contributor grants the licenses to its Contributions set forth herein, no assurances are provided by any Contributor that the Program does not infringe the patent or other intellectual property rights of any other entity. Each Contributor disclaims any liability to Recipient for claims brought by any other entity based on infringement of intellectual property rights or otherwise. As a condition to exercising the rights and licenses granted hereunder, each Recipient hereby assumes sole responsibility to secure any other intellectual property rights needed, if any. For example, if a third party patent license is required to allow Recipient to distribute the Program, it is Recipient's responsibility to acquire that license before distributing the Program.
+
+d) Each Contributor represents that to its knowledge it has sufficient copyright rights in its Contribution, if any, to grant the copyright license set forth in this Agreement.
+
+3. REQUIREMENTS
+
+A Contributor may choose to distribute the Program in object code form under its own license agreement, provided that:
+
+a) it complies with the terms and conditions of this Agreement; and
+
+b) its license agreement:
+
+i) effectively disclaims on behalf of all Contributors all warranties and conditions, express and implied, including warranties or conditions of title and non-infringement, and implied warranties or conditions of merchantability and fitness for a particular purpose;
+
+ii) effectively excludes on behalf of all Contributors all liability for damages, including direct, indirect, special, incidental and consequential damages, such as lost profits;
+
+iii) states that any provisions which differ from this Agreement are offered by that Contributor alone and not by any other party; and
+
+iv) states that source code for the Program is available from such Contributor, and informs licensees how to obtain it in a reasonable manner on or through a medium customarily used for software exchange.
+
+When the Program is made available in source code form:
+
+a) it must be made available under this Agreement; and
+
+b) a copy of this Agreement must be included with each copy of the Program.
+
+Contributors may not remove or alter any copyright notices contained within the Program.
+
+Each Contributor must identify itself as the originator of its Contribution, if any, in a manner that reasonably allows subsequent Recipients to identify the originator of the Contribution.
+
+4. COMMERCIAL DISTRIBUTION
+
+Commercial distributors of software may accept certain responsibilities with respect to end users, business partners and the like. While this license is intended to facilitate the commercial use of the Program, the Contributor who includes the Program in a commercial product offering should do so in a manner which does not create potential liability for other Contributors. Therefore, if a Contributor includes the Program in a commercial product offering, such Contributor ("Commercial Contributor") hereby agrees to defend and indemnify every other Contributor ("Indemnified Contributor") against any losses, damages and costs (collectively "Losses") arising from claims, lawsuits and other legal actions brought by a third party against the Indemnified Contributor to the extent caused by the acts or omissions of such Commercial Contributor in connection with its distribution of the Program in a commercial product offering. The obligations in this section do not apply to any claims or Losses relating to any actual or alleged intellectual property infringement. In order to qualify, an Indemnified Contributor must: a) promptly notify the Commercial Contributor in writing of such claim, and b) allow the Commercial Contributor to control, and cooperate with the Commercial Contributor in, the defense and any related settlement negotiations. The Indemnified Contributor may participate in any such claim at its own expense.
+
+For example, a Contributor might include the Program in a commercial product offering, Product X. That Contributor is then a Commercial Contributor. If that Commercial Contributor then makes performance claims, or offers warranties related to Product X, those performance claims and warranties are such Commercial Contributor's responsibility alone. Under this section, the Commercial Contributor would have to defend claims against the other Contributors related to those performance claims and warranties, and if a court requires any other Contributor to pay any damages as a result, the Commercial Contributor must pay those damages.
+
+5. NO WARRANTY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is solely responsible for determining the appropriateness of using and distributing the Program and assumes all risks associated with its exercise of rights under this Agreement , including but not limited to the risks and costs of program errors, compliance with applicable laws, damage to or loss of data, programs or equipment, and unavailability or interruption of operations.
+
+6. DISCLAIMER OF LIABILITY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+7. GENERAL
+
+If any provision of this Agreement is invalid or unenforceable under applicable law, it shall not affect the validity or enforceability of the remainder of the terms of this Agreement, and without further action by the parties hereto, such provision shall be reformed to the minimum extent necessary to make such provision valid and enforceable.
+
+If Recipient institutes patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Program itself (excluding combinations of the Program with other software or hardware) infringes such Recipient's patent(s), then such Recipient's rights granted under Section 2(b) shall terminate as of the date such litigation is filed.
+
+All Recipient's rights under this Agreement shall terminate if it fails to comply with any of the material terms or conditions of this Agreement and does not cure such failure in a reasonable period of time after becoming aware of such noncompliance. If all Recipient's rights under this Agreement terminate, Recipient agrees to cease use and distribution of the Program as soon as reasonably practicable. However, Recipient's obligations under this Agreement and any licenses granted by Recipient relating to the Program shall continue and survive.
+
+Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation is the initial Agreement Steward. The Eclipse Foundation may assign the responsibility to serve as the Agreement Steward to a suitable separate entity. Each new version of the Agreement will be given a distinguishing version number. The Program (including Contributions) may always be distributed subject to the version of the Agreement under which it was received. In addition, after a new version of the Agreement is published, Contributor may elect to distribute the Program (including its Contributions) under the new version. Except as expressly stated in Sections 2(a) and 2(b) above, Recipient receives no rights or licenses to the intellectual property of any Contributor under this Agreement, whether expressly, by implication, estoppel or otherwise. All rights in the Program not expressly granted under this Agreement are reserved.
+
+This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.

vendor/github.com/eclipse/paho.mqtt.golang/README.md

@@ -0,0 +1,67 @@
+
+[![GoDoc](https://godoc.org/github.com/eclipse/paho.mqtt.golang?status.svg)](https://godoc.org/github.com/eclipse/paho.mqtt.golang)
+[![Go Report Card](https://goreportcard.com/badge/github.com/eclipse/paho.mqtt.golang)](https://goreportcard.com/report/github.com/eclipse/paho.mqtt.golang)
+
+Eclipse Paho MQTT Go client
+===========================
+
+
+This repository contains the source code for the [Eclipse Paho](http://eclipse.org/paho) MQTT Go client library. 
+
+This code builds a library which enable applications to connect to an [MQTT](http://mqtt.org) broker to publish messages, and to subscribe to topics and receive published messages.
+
+This library supports a fully asynchronous mode of operation.
+
+
+Installation and Build
+----------------------
+
+This client is designed to work with the standard Go tools, so installation is as easy as:
+
+```
+go get github.com/eclipse/paho.mqtt.golang
+```
+
+The client depends on Google's [websockets](https://godoc.org/golang.org/x/net/websocket) and [proxy](https://godoc.org/golang.org/x/net/proxy) package, 
+also easily installed with the commands:
+
+```
+go get golang.org/x/net/websocket
+go get golang.org/x/net/proxy
+```
+
+
+Usage and API
+-------------
+
+Detailed API documentation is available by using to godoc tool, or can be browsed online
+using the [godoc.org](http://godoc.org/github.com/eclipse/paho.mqtt.golang) service.
+
+Make use of the library by importing it in your Go client source code. For example,
+```
+import "github.com/eclipse/paho.mqtt.golang"
+```
+
+Samples are available in the `cmd` directory for reference.
+
+
+Runtime tracing
+---------------
+
+Tracing is enabled by assigning logs (from the Go log package) to the logging endpoints, ERROR, CRITICAL, WARN and DEBUG
+
+
+Reporting bugs
+--------------
+
+Please report bugs by raising issues for this project in github https://github.com/eclipse/paho.mqtt.golang/issues 
+
+
+More information
+----------------
+
+Discussion of the Paho clients takes place on the [Eclipse paho-dev mailing list](https://dev.eclipse.org/mailman/listinfo/paho-dev).
+
+General questions about the MQTT protocol are discussed in the [MQTT Google Group](https://groups.google.com/forum/?hl=en-US&fromgroups#!forum/mqtt).
+
+There is much more information available via the [MQTT community site](http://mqtt.org).

vendor/github.com/eclipse/paho.mqtt.golang/about.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"><head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>About</title>
+</head>
+<body lang="EN-US">
+<h2>About This Content</h2>
+ 
+<p><em>December 9, 2013</em></p>	
+<h3>License</h3>
+
+<p>The Eclipse Foundation makes available all content in this plug-in ("Content").  Unless otherwise 
+indicated below, the Content is provided to you under the terms and conditions of the
+Eclipse Public License Version 1.0 ("EPL") and Eclipse Distribution License Version 1.0 ("EDL").
+A copy of the EPL is available at 
+<a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a> 
+and a copy of the EDL is available at 
+<a href="http://www.eclipse.org/org/documents/edl-v10.php">http://www.eclipse.org/org/documents/edl-v10.php</a>. 
+For purposes of the EPL, "Program" will mean the Content.</p>
+
+<p>If you did not receive this Content directly from the Eclipse Foundation, the Content is 
+being redistributed by another party ("Redistributor") and different terms and conditions may
+apply to your use of any object code in the Content.  Check the Redistributor's license that was 
+provided with the Content.  If no such license exists, contact the Redistributor.  Unless otherwise
+indicated below, the terms and conditions of the EPL still apply to any source code in the Content
+and such source code may be obtained at <a href="http://www.eclipse.org/">http://www.eclipse.org</a>.</p>
+
+		
+		<h3>Third Party Content</h3>
+		<p>The Content includes items that have been sourced from third parties as set out below. If you 
+		did not receive this Content directly from the Eclipse Foundation, the following is provided 
+		for informational purposes only, and you should look to the Redistributor's license for 
+		terms and conditions of use.</p>
+		<p><em>
+		<strong>None</strong> <br><br>
+		<br><br> 
+		</em></p>
+
+
+
+</body></html>

vendor/github.com/eclipse/paho.mqtt.golang/client.go

@@ -0,0 +1,759 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+// Portions copyright © 2018 TIBCO Software Inc.
+
+// Package mqtt provides an MQTT v3.1.1 client library.
+package mqtt
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+const (
+	disconnected uint32 = iota
+	connecting
+	reconnecting
+	connected
+)
+
+// Client is the interface definition for a Client as used by this
+// library, the interface is primarily to allow mocking tests.
+//
+// It is an MQTT v3.1.1 client for communicating
+// with an MQTT server using non-blocking methods that allow work
+// to be done in the background.
+// An application may connect to an MQTT server using:
+//   A plain TCP socket
+//   A secure SSL/TLS socket
+//   A websocket
+// To enable ensured message delivery at Quality of Service (QoS) levels
+// described in the MQTT spec, a message persistence mechanism must be
+// used. This is done by providing a type which implements the Store
+// interface. For convenience, FileStore and MemoryStore are provided
+// implementations that should be sufficient for most use cases. More
+// information can be found in their respective documentation.
+// Numerous connection options may be specified by configuring a
+// and then supplying a ClientOptions type.
+type Client interface {
+	// IsConnected returns a bool signifying whether
+	// the client is connected or not.
+	IsConnected() bool
+	// IsConnectionOpen return a bool signifying wether the client has an active
+	// connection to mqtt broker, i.e not in disconnected or reconnect mode
+	IsConnectionOpen() bool
+	// Connect will create a connection to the message broker, by default
+	// it will attempt to connect at v3.1.1 and auto retry at v3.1 if that
+	// fails
+	Connect() Token
+	// Disconnect will end the connection with the server, but not before waiting
+	// the specified number of milliseconds to wait for existing work to be
+	// completed.
+	Disconnect(quiesce uint)
+	// Publish will publish a message with the specified QoS and content
+	// to the specified topic.
+	// Returns a token to track delivery of the message to the broker
+	Publish(topic string, qos byte, retained bool, payload interface{}) Token
+	// Subscribe starts a new subscription. Provide a MessageHandler to be executed when
+	// a message is published on the topic provided, or nil for the default handler
+	Subscribe(topic string, qos byte, callback MessageHandler) Token
+	// SubscribeMultiple starts a new subscription for multiple topics. Provide a MessageHandler to
+	// be executed when a message is published on one of the topics provided, or nil for the
+	// default handler
+	SubscribeMultiple(filters map[string]byte, callback MessageHandler) Token
+	// Unsubscribe will end the subscription from each of the topics provided.
+	// Messages published to those topics from other clients will no longer be
+	// received.
+	Unsubscribe(topics ...string) Token
+	// AddRoute allows you to add a handler for messages on a specific topic
+	// without making a subscription. For example having a different handler
+	// for parts of a wildcard subscription
+	AddRoute(topic string, callback MessageHandler)
+	// OptionsReader returns a ClientOptionsReader which is a copy of the clientoptions
+	// in use by the client.
+	OptionsReader() ClientOptionsReader
+}
+
+// client implements the Client interface
+type client struct {
+	lastSent        atomic.Value
+	lastReceived    atomic.Value
+	pingOutstanding int32
+	status          uint32
+	sync.RWMutex
+	messageIds
+	conn            net.Conn
+	ibound          chan packets.ControlPacket
+	obound          chan *PacketAndToken
+	oboundP         chan *PacketAndToken
+	msgRouter       *router
+	stopRouter      chan bool
+	incomingPubChan chan *packets.PublishPacket
+	errors          chan error
+	stop            chan struct{}
+	persist         Store
+	options         ClientOptions
+	workers         sync.WaitGroup
+}
+
+// NewClient will create an MQTT v3.1.1 client with all of the options specified
+// in the provided ClientOptions. The client must have the Connect method called
+// on it before it may be used. This is to make sure resources (such as a net
+// connection) are created before the application is actually ready.
+func NewClient(o *ClientOptions) Client {
+	c := &client{}
+	c.options = *o
+
+	if c.options.Store == nil {
+		c.options.Store = NewMemoryStore()
+	}
+	switch c.options.ProtocolVersion {
+	case 3, 4:
+		c.options.protocolVersionExplicit = true
+	case 0x83, 0x84:
+		c.options.protocolVersionExplicit = true
+	default:
+		c.options.ProtocolVersion = 4
+		c.options.protocolVersionExplicit = false
+	}
+	c.persist = c.options.Store
+	c.status = disconnected
+	c.messageIds = messageIds{index: make(map[uint16]tokenCompletor)}
+	c.msgRouter, c.stopRouter = newRouter()
+	c.msgRouter.setDefaultHandler(c.options.DefaultPublishHandler)
+	if !c.options.AutoReconnect {
+		c.options.MessageChannelDepth = 0
+	}
+	return c
+}
+
+// AddRoute allows you to add a handler for messages on a specific topic
+// without making a subscription. For example having a different handler
+// for parts of a wildcard subscription
+func (c *client) AddRoute(topic string, callback MessageHandler) {
+	if callback != nil {
+		c.msgRouter.addRoute(topic, callback)
+	}
+}
+
+// IsConnected returns a bool signifying whether
+// the client is connected or not.
+func (c *client) IsConnected() bool {
+	c.RLock()
+	defer c.RUnlock()
+	status := atomic.LoadUint32(&c.status)
+	switch {
+	case status == connected:
+		return true
+	case c.options.AutoReconnect && status > connecting:
+		return true
+	default:
+		return false
+	}
+}
+
+// IsConnectionOpen return a bool signifying whether the client has an active
+// connection to mqtt broker, i.e not in disconnected or reconnect mode
+func (c *client) IsConnectionOpen() bool {
+	c.RLock()
+	defer c.RUnlock()
+	status := atomic.LoadUint32(&c.status)
+	switch {
+	case status == connected:
+		return true
+	default:
+		return false
+	}
+}
+
+func (c *client) connectionStatus() uint32 {
+	c.RLock()
+	defer c.RUnlock()
+	status := atomic.LoadUint32(&c.status)
+	return status
+}
+
+func (c *client) setConnected(status uint32) {
+	c.Lock()
+	defer c.Unlock()
+	atomic.StoreUint32(&c.status, uint32(status))
+}
+
+//ErrNotConnected is the error returned from function calls that are
+//made when the client is not connected to a broker
+var ErrNotConnected = errors.New("Not Connected")
+
+// Connect will create a connection to the message broker, by default
+// it will attempt to connect at v3.1.1 and auto retry at v3.1 if that
+// fails
+func (c *client) Connect() Token {
+	var err error
+	t := newToken(packets.Connect).(*ConnectToken)
+	DEBUG.Println(CLI, "Connect()")
+
+	c.obound = make(chan *PacketAndToken, c.options.MessageChannelDepth)
+	c.oboundP = make(chan *PacketAndToken, c.options.MessageChannelDepth)
+	c.ibound = make(chan packets.ControlPacket)
+
+	go func() {
+		c.persist.Open()
+
+		c.setConnected(connecting)
+		c.errors = make(chan error, 1)
+		c.stop = make(chan struct{})
+
+		var rc byte
+		protocolVersion := c.options.ProtocolVersion
+
+		if len(c.options.Servers) == 0 {
+			t.setError(fmt.Errorf("No servers defined to connect to"))
+			return
+		}
+
+		for _, broker := range c.options.Servers {
+			cm := newConnectMsgFromOptions(&c.options, broker)
+			c.options.ProtocolVersion = protocolVersion
+		CONN:
+			DEBUG.Println(CLI, "about to write new connect msg")
+			c.conn, err = openConnection(broker, c.options.TLSConfig, c.options.ConnectTimeout, c.options.HTTPHeaders)
+			if err == nil {
+				DEBUG.Println(CLI, "socket connected to broker")
+				switch c.options.ProtocolVersion {
+				case 3:
+					DEBUG.Println(CLI, "Using MQTT 3.1 protocol")
+					cm.ProtocolName = "MQIsdp"
+					cm.ProtocolVersion = 3
+				case 0x83:
+					DEBUG.Println(CLI, "Using MQTT 3.1b protocol")
+					cm.ProtocolName = "MQIsdp"
+					cm.ProtocolVersion = 0x83
+				case 0x84:
+					DEBUG.Println(CLI, "Using MQTT 3.1.1b protocol")
+					cm.ProtocolName = "MQTT"
+					cm.ProtocolVersion = 0x84
+				default:
+					DEBUG.Println(CLI, "Using MQTT 3.1.1 protocol")
+					c.options.ProtocolVersion = 4
+					cm.ProtocolName = "MQTT"
+					cm.ProtocolVersion = 4
+				}
+				cm.Write(c.conn)
+
+				rc, t.sessionPresent = c.connect()
+				if rc != packets.Accepted {
+					if c.conn != nil {
+						c.conn.Close()
+						c.conn = nil
+					}
+					//if the protocol version was explicitly set don't do any fallback
+					if c.options.protocolVersionExplicit {
+						ERROR.Println(CLI, "Connecting to", broker, "CONNACK was not CONN_ACCEPTED, but rather", packets.ConnackReturnCodes[rc])
+						continue
+					}
+					if c.options.ProtocolVersion == 4 {
+						DEBUG.Println(CLI, "Trying reconnect using MQTT 3.1 protocol")
+						c.options.ProtocolVersion = 3
+						goto CONN
+					}
+				}
+				break
+			} else {
+				ERROR.Println(CLI, err.Error())
+				WARN.Println(CLI, "failed to connect to broker, trying next")
+				rc = packets.ErrNetworkError
+			}
+		}
+
+		if c.conn == nil {
+			ERROR.Println(CLI, "Failed to connect to a broker")
+			c.setConnected(disconnected)
+			c.persist.Close()
+			t.returnCode = rc
+			if rc != packets.ErrNetworkError {
+				t.setError(packets.ConnErrors[rc])
+			} else {
+				t.setError(fmt.Errorf("%s : %s", packets.ConnErrors[rc], err))
+			}
+			return
+		}
+
+		c.options.protocolVersionExplicit = true
+
+		if c.options.KeepAlive != 0 {
+			atomic.StoreInt32(&c.pingOutstanding, 0)
+			c.lastReceived.Store(time.Now())
+			c.lastSent.Store(time.Now())
+			c.workers.Add(1)
+			go keepalive(c)
+		}
+
+		c.incomingPubChan = make(chan *packets.PublishPacket, c.options.MessageChannelDepth)
+		c.msgRouter.matchAndDispatch(c.incomingPubChan, c.options.Order, c)
+
+		c.setConnected(connected)
+		DEBUG.Println(CLI, "client is connected")
+		if c.options.OnConnect != nil {
+			go c.options.OnConnect(c)
+		}
+
+		c.workers.Add(4)
+		go errorWatch(c)
+		go alllogic(c)
+		go outgoing(c)
+		go incoming(c)
+
+		// Take care of any messages in the store
+		if c.options.CleanSession == false {
+			c.resume(c.options.ResumeSubs)
+		} else {
+			c.persist.Reset()
+		}
+
+		DEBUG.Println(CLI, "exit startClient")
+		t.flowComplete()
+	}()
+	return t
+}
+
+// internal function used to reconnect the client when it loses its connection
+func (c *client) reconnect() {
+	DEBUG.Println(CLI, "enter reconnect")
+	var (
+		err error
+
+		rc    = byte(1)
+		sleep = time.Duration(1 * time.Second)
+	)
+
+	for rc != 0 && atomic.LoadUint32(&c.status) != disconnected {
+		for _, broker := range c.options.Servers {
+			cm := newConnectMsgFromOptions(&c.options, broker)
+			DEBUG.Println(CLI, "about to write new connect msg")
+			c.Lock()
+			c.conn, err = openConnection(broker, c.options.TLSConfig, c.options.ConnectTimeout, c.options.HTTPHeaders)
+			c.Unlock()
+			if err == nil {
+				DEBUG.Println(CLI, "socket connected to broker")
+				switch c.options.ProtocolVersion {
+				case 0x83:
+					DEBUG.Println(CLI, "Using MQTT 3.1b protocol")
+					cm.ProtocolName = "MQIsdp"
+					cm.ProtocolVersion = 0x83
+				case 0x84:
+					DEBUG.Println(CLI, "Using MQTT 3.1.1b protocol")
+					cm.ProtocolName = "MQTT"
+					cm.ProtocolVersion = 0x84
+				case 3:
+					DEBUG.Println(CLI, "Using MQTT 3.1 protocol")
+					cm.ProtocolName = "MQIsdp"
+					cm.ProtocolVersion = 3
+				default:
+					DEBUG.Println(CLI, "Using MQTT 3.1.1 protocol")
+					cm.ProtocolName = "MQTT"
+					cm.ProtocolVersion = 4
+				}
+				cm.Write(c.conn)
+
+				rc, _ = c.connect()
+				if rc != packets.Accepted {
+					c.conn.Close()
+					c.conn = nil
+					//if the protocol version was explicitly set don't do any fallback
+					if c.options.protocolVersionExplicit {
+						ERROR.Println(CLI, "Connecting to", broker, "CONNACK was not Accepted, but rather", packets.ConnackReturnCodes[rc])
+						continue
+					}
+				}
+				break
+			} else {
+				ERROR.Println(CLI, err.Error())
+				WARN.Println(CLI, "failed to connect to broker, trying next")
+				rc = packets.ErrNetworkError
+			}
+		}
+		if rc != 0 {
+			DEBUG.Println(CLI, "Reconnect failed, sleeping for", int(sleep.Seconds()), "seconds")
+			time.Sleep(sleep)
+			if sleep < c.options.MaxReconnectInterval {
+				sleep *= 2
+			}
+
+			if sleep > c.options.MaxReconnectInterval {
+				sleep = c.options.MaxReconnectInterval
+			}
+		}
+	}
+	// Disconnect() must have been called while we were trying to reconnect.
+	if c.connectionStatus() == disconnected {
+		DEBUG.Println(CLI, "Client moved to disconnected state while reconnecting, abandoning reconnect")
+		return
+	}
+
+	c.stop = make(chan struct{})
+
+	if c.options.KeepAlive != 0 {
+		atomic.StoreInt32(&c.pingOutstanding, 0)
+		c.lastReceived.Store(time.Now())
+		c.lastSent.Store(time.Now())
+		c.workers.Add(1)
+		go keepalive(c)
+	}
+
+	c.setConnected(connected)
+	DEBUG.Println(CLI, "client is reconnected")
+	if c.options.OnConnect != nil {
+		go c.options.OnConnect(c)
+	}
+
+	c.workers.Add(4)
+	go errorWatch(c)
+	go alllogic(c)
+	go outgoing(c)
+	go incoming(c)
+
+	c.resume(false)
+}
+
+// This function is only used for receiving a connack
+// when the connection is first started.
+// This prevents receiving incoming data while resume
+// is in progress if clean session is false.
+func (c *client) connect() (byte, bool) {
+	DEBUG.Println(NET, "connect started")
+
+	ca, err := packets.ReadPacket(c.conn)
+	if err != nil {
+		ERROR.Println(NET, "connect got error", err)
+		return packets.ErrNetworkError, false
+	}
+	if ca == nil {
+		ERROR.Println(NET, "received nil packet")
+		return packets.ErrNetworkError, false
+	}
+
+	msg, ok := ca.(*packets.ConnackPacket)
+	if !ok {
+		ERROR.Println(NET, "received msg that was not CONNACK")
+		return packets.ErrNetworkError, false
+	}
+
+	DEBUG.Println(NET, "received connack")
+	return msg.ReturnCode, msg.SessionPresent
+}
+
+// Disconnect will end the connection with the server, but not before waiting
+// the specified number of milliseconds to wait for existing work to be
+// completed.
+func (c *client) Disconnect(quiesce uint) {
+	status := atomic.LoadUint32(&c.status)
+	if status == connected {
+		DEBUG.Println(CLI, "disconnecting")
+		c.setConnected(disconnected)
+
+		dm := packets.NewControlPacket(packets.Disconnect).(*packets.DisconnectPacket)
+		dt := newToken(packets.Disconnect)
+		c.oboundP <- &PacketAndToken{p: dm, t: dt}
+
+		// wait for work to finish, or quiesce time consumed
+		dt.WaitTimeout(time.Duration(quiesce) * time.Millisecond)
+	} else {
+		WARN.Println(CLI, "Disconnect() called but not connected (disconnected/reconnecting)")
+		c.setConnected(disconnected)
+	}
+
+	c.disconnect()
+}
+
+// ForceDisconnect will end the connection with the mqtt broker immediately.
+func (c *client) forceDisconnect() {
+	if !c.IsConnected() {
+		WARN.Println(CLI, "already disconnected")
+		return
+	}
+	c.setConnected(disconnected)
+	c.conn.Close()
+	DEBUG.Println(CLI, "forcefully disconnecting")
+	c.disconnect()
+}
+
+func (c *client) internalConnLost(err error) {
+	// Only do anything if this was called and we are still "connected"
+	// forceDisconnect can cause incoming/outgoing/alllogic to end with
+	// error from closing the socket but state will be "disconnected"
+	if c.IsConnected() {
+		c.closeStop()
+		c.conn.Close()
+		c.workers.Wait()
+		if c.options.CleanSession && !c.options.AutoReconnect {
+			c.messageIds.cleanUp()
+		}
+		if c.options.AutoReconnect {
+			c.setConnected(reconnecting)
+			go c.reconnect()
+		} else {
+			c.setConnected(disconnected)
+		}
+		if c.options.OnConnectionLost != nil {
+			go c.options.OnConnectionLost(c, err)
+		}
+	}
+}
+
+func (c *client) closeStop() {
+	c.Lock()
+	defer c.Unlock()
+	select {
+	case <-c.stop:
+		DEBUG.Println("In disconnect and stop channel is already closed")
+	default:
+		if c.stop != nil {
+			close(c.stop)
+		}
+	}
+}
+
+func (c *client) closeStopRouter() {
+	c.Lock()
+	defer c.Unlock()
+	select {
+	case <-c.stopRouter:
+		DEBUG.Println("In disconnect and stop channel is already closed")
+	default:
+		if c.stopRouter != nil {
+			close(c.stopRouter)
+		}
+	}
+}
+
+func (c *client) closeConn() {
+	c.Lock()
+	defer c.Unlock()
+	if c.conn != nil {
+		c.conn.Close()
+	}
+}
+
+func (c *client) disconnect() {
+	c.closeStop()
+	c.closeConn()
+	c.workers.Wait()
+	c.messageIds.cleanUp()
+	c.closeStopRouter()
+	DEBUG.Println(CLI, "disconnected")
+	c.persist.Close()
+}
+
+// Publish will publish a message with the specified QoS and content
+// to the specified topic.
+// Returns a token to track delivery of the message to the broker
+func (c *client) Publish(topic string, qos byte, retained bool, payload interface{}) Token {
+	token := newToken(packets.Publish).(*PublishToken)
+	DEBUG.Println(CLI, "enter Publish")
+	switch {
+	case !c.IsConnected():
+		token.setError(ErrNotConnected)
+		return token
+	case c.connectionStatus() == reconnecting && qos == 0:
+		token.flowComplete()
+		return token
+	}
+	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
+	pub.Qos = qos
+	pub.TopicName = topic
+	pub.Retain = retained
+	switch payload.(type) {
+	case string:
+		pub.Payload = []byte(payload.(string))
+	case []byte:
+		pub.Payload = payload.([]byte)
+	default:
+		token.setError(fmt.Errorf("Unknown payload type"))
+		return token
+	}
+
+	if pub.Qos != 0 && pub.MessageID == 0 {
+		pub.MessageID = c.getID(token)
+		token.messageID = pub.MessageID
+	}
+	persistOutbound(c.persist, pub)
+	if c.connectionStatus() == reconnecting {
+		DEBUG.Println(CLI, "storing publish message (reconnecting), topic:", topic)
+	} else {
+		DEBUG.Println(CLI, "sending publish message, topic:", topic)
+		c.obound <- &PacketAndToken{p: pub, t: token}
+	}
+	return token
+}
+
+// Subscribe starts a new subscription. Provide a MessageHandler to be executed when
+// a message is published on the topic provided.
+func (c *client) Subscribe(topic string, qos byte, callback MessageHandler) Token {
+	token := newToken(packets.Subscribe).(*SubscribeToken)
+	DEBUG.Println(CLI, "enter Subscribe")
+	if !c.IsConnected() {
+		token.setError(ErrNotConnected)
+		return token
+	}
+	sub := packets.NewControlPacket(packets.Subscribe).(*packets.SubscribePacket)
+	if err := validateTopicAndQos(topic, qos); err != nil {
+		token.setError(err)
+		return token
+	}
+	sub.Topics = append(sub.Topics, topic)
+	sub.Qoss = append(sub.Qoss, qos)
+	DEBUG.Println(CLI, sub.String())
+
+	if strings.HasPrefix(topic, "$share") {
+		topic = strings.Join(strings.Split(topic, "/")[2:], "/")
+	}
+
+	if callback != nil {
+		c.msgRouter.addRoute(topic, callback)
+	}
+
+	token.subs = append(token.subs, topic)
+	c.oboundP <- &PacketAndToken{p: sub, t: token}
+	DEBUG.Println(CLI, "exit Subscribe")
+	return token
+}
+
+// SubscribeMultiple starts a new subscription for multiple topics. Provide a MessageHandler to
+// be executed when a message is published on one of the topics provided.
+func (c *client) SubscribeMultiple(filters map[string]byte, callback MessageHandler) Token {
+	var err error
+	token := newToken(packets.Subscribe).(*SubscribeToken)
+	DEBUG.Println(CLI, "enter SubscribeMultiple")
+	if !c.IsConnected() {
+		token.setError(ErrNotConnected)
+		return token
+	}
+	sub := packets.NewControlPacket(packets.Subscribe).(*packets.SubscribePacket)
+	if sub.Topics, sub.Qoss, err = validateSubscribeMap(filters); err != nil {
+		token.setError(err)
+		return token
+	}
+
+	if callback != nil {
+		for topic := range filters {
+			c.msgRouter.addRoute(topic, callback)
+		}
+	}
+	token.subs = make([]string, len(sub.Topics))
+	copy(token.subs, sub.Topics)
+	c.oboundP <- &PacketAndToken{p: sub, t: token}
+	DEBUG.Println(CLI, "exit SubscribeMultiple")
+	return token
+}
+
+// Load all stored messages and resend them
+// Call this to ensure QOS > 1,2 even after an application crash
+func (c *client) resume(subscription bool) {
+
+	storedKeys := c.persist.All()
+	for _, key := range storedKeys {
+		packet := c.persist.Get(key)
+		if packet == nil {
+			continue
+		}
+		details := packet.Details()
+		if isKeyOutbound(key) {
+			switch packet.(type) {
+			case *packets.SubscribePacket:
+				if subscription {
+					DEBUG.Println(STR, fmt.Sprintf("loaded pending subscribe (%d)", details.MessageID))
+					token := newToken(packets.Subscribe).(*SubscribeToken)
+					c.oboundP <- &PacketAndToken{p: packet, t: token}
+				}
+			case *packets.UnsubscribePacket:
+				if subscription {
+					DEBUG.Println(STR, fmt.Sprintf("loaded pending unsubscribe (%d)", details.MessageID))
+					token := newToken(packets.Unsubscribe).(*UnsubscribeToken)
+					c.oboundP <- &PacketAndToken{p: packet, t: token}
+				}
+			case *packets.PubrelPacket:
+				DEBUG.Println(STR, fmt.Sprintf("loaded pending pubrel (%d)", details.MessageID))
+				select {
+				case c.oboundP <- &PacketAndToken{p: packet, t: nil}:
+				case <-c.stop:
+				}
+			case *packets.PublishPacket:
+				token := newToken(packets.Publish).(*PublishToken)
+				token.messageID = details.MessageID
+				c.claimID(token, details.MessageID)
+				DEBUG.Println(STR, fmt.Sprintf("loaded pending publish (%d)", details.MessageID))
+				DEBUG.Println(STR, details)
+				c.obound <- &PacketAndToken{p: packet, t: token}
+			default:
+				ERROR.Println(STR, "invalid message type in store (discarded)")
+				c.persist.Del(key)
+			}
+		} else {
+			switch packet.(type) {
+			case *packets.PubrelPacket, *packets.PublishPacket:
+				DEBUG.Println(STR, fmt.Sprintf("loaded pending incomming (%d)", details.MessageID))
+				select {
+				case c.ibound <- packet:
+				case <-c.stop:
+				}
+			default:
+				ERROR.Println(STR, "invalid message type in store (discarded)")
+				c.persist.Del(key)
+			}
+		}
+	}
+}
+
+// Unsubscribe will end the subscription from each of the topics provided.
+// Messages published to those topics from other clients will no longer be
+// received.
+func (c *client) Unsubscribe(topics ...string) Token {
+	token := newToken(packets.Unsubscribe).(*UnsubscribeToken)
+	DEBUG.Println(CLI, "enter Unsubscribe")
+	if !c.IsConnected() {
+		token.setError(ErrNotConnected)
+		return token
+	}
+	unsub := packets.NewControlPacket(packets.Unsubscribe).(*packets.UnsubscribePacket)
+	unsub.Topics = make([]string, len(topics))
+	copy(unsub.Topics, topics)
+
+	c.oboundP <- &PacketAndToken{p: unsub, t: token}
+	for _, topic := range topics {
+		c.msgRouter.deleteRoute(topic)
+	}
+
+	DEBUG.Println(CLI, "exit Unsubscribe")
+	return token
+}
+
+// OptionsReader returns a ClientOptionsReader which is a copy of the clientoptions
+// in use by the client.
+func (c *client) OptionsReader() ClientOptionsReader {
+	r := ClientOptionsReader{options: &c.options}
+	return r
+}
+
+//DefaultConnectionLostHandler is a definition of a function that simply
+//reports to the DEBUG log the reason for the client losing a connection.
+func DefaultConnectionLostHandler(client Client, reason error) {
+	DEBUG.Println("Connection lost:", reason.Error())
+}

vendor/github.com/eclipse/paho.mqtt.golang/components.go

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+type component string
+
+// Component names for debug output
+const (
+	NET component = "[net]     "
+	PNG component = "[pinger]  "
+	CLI component = "[client]  "
+	DEC component = "[decode]  "
+	MES component = "[message] "
+	STR component = "[store]   "
+	MID component = "[msgids]  "
+	TST component = "[test]    "
+	STA component = "[state]   "
+	ERR component = "[error]   "
+)

vendor/github.com/eclipse/paho.mqtt.golang/edl-v10

@@ -0,0 +1,15 @@
+
+Eclipse Distribution License - v 1.0
+
+Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors.
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    Neither the name of the Eclipse Foundation, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

vendor/github.com/eclipse/paho.mqtt.golang/epl-v10

@@ -0,0 +1,70 @@
+Eclipse Public License - v 1.0
+
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+1. DEFINITIONS
+
+"Contribution" means:
+
+a) in the case of the initial Contributor, the initial code and documentation distributed under this Agreement, and
+b) in the case of each subsequent Contributor:
+i) changes to the Program, and
+ii) additions to the Program;
+where such changes and/or additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or anyone acting on such Contributor's behalf. Contributions do not include additions to the Program which: (i) are separate modules of software distributed in conjunction with the Program under their own license agreement, and (ii) are not derivative works of the Program.
+"Contributor" means any person or entity that distributes the Program.
+
+"Licensed Patents" mean patent claims licensable by a Contributor which are necessarily infringed by the use or sale of its Contribution alone or when combined with the Program.
+
+"Program" means the Contributions distributed in accordance with this Agreement.
+
+"Recipient" means anyone who receives the Program under this Agreement, including all Contributors.
+
+2. GRANT OF RIGHTS
+
+a) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, distribute and sublicense the Contribution of such Contributor, if any, and such derivative works, in source code and object code form.
+b) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free patent license under Licensed Patents to make, use, sell, offer to sell, import and otherwise transfer the Contribution of such Contributor, if any, in source code and object code form. This patent license shall apply to the combination of the Contribution and the Program if, at the time the Contribution is added by the Contributor, such addition of the Contribution causes such combination to be covered by the Licensed Patents. The patent license shall not apply to any other combinations which include the Contribution. No hardware per se is licensed hereunder.
+c) Recipient understands that although each Contributor grants the licenses to its Contributions set forth herein, no assurances are provided by any Contributor that the Program does not infringe the patent or other intellectual property rights of any other entity. Each Contributor disclaims any liability to Recipient for claims brought by any other entity based on infringement of intellectual property rights or otherwise. As a condition to exercising the rights and licenses granted hereunder, each Recipient hereby assumes sole responsibility to secure any other intellectual property rights needed, if any. For example, if a third party patent license is required to allow Recipient to distribute the Program, it is Recipient's responsibility to acquire that license before distributing the Program.
+d) Each Contributor represents that to its knowledge it has sufficient copyright rights in its Contribution, if any, to grant the copyright license set forth in this Agreement.
+3. REQUIREMENTS
+
+A Contributor may choose to distribute the Program in object code form under its own license agreement, provided that:
+
+a) it complies with the terms and conditions of this Agreement; and
+b) its license agreement:
+i) effectively disclaims on behalf of all Contributors all warranties and conditions, express and implied, including warranties or conditions of title and non-infringement, and implied warranties or conditions of merchantability and fitness for a particular purpose;
+ii) effectively excludes on behalf of all Contributors all liability for damages, including direct, indirect, special, incidental and consequential damages, such as lost profits;
+iii) states that any provisions which differ from this Agreement are offered by that Contributor alone and not by any other party; and
+iv) states that source code for the Program is available from such Contributor, and informs licensees how to obtain it in a reasonable manner on or through a medium customarily used for software exchange.
+When the Program is made available in source code form:
+
+a) it must be made available under this Agreement; and
+b) a copy of this Agreement must be included with each copy of the Program.
+Contributors may not remove or alter any copyright notices contained within the Program.
+
+Each Contributor must identify itself as the originator of its Contribution, if any, in a manner that reasonably allows subsequent Recipients to identify the originator of the Contribution.
+
+4. COMMERCIAL DISTRIBUTION
+
+Commercial distributors of software may accept certain responsibilities with respect to end users, business partners and the like. While this license is intended to facilitate the commercial use of the Program, the Contributor who includes the Program in a commercial product offering should do so in a manner which does not create potential liability for other Contributors. Therefore, if a Contributor includes the Program in a commercial product offering, such Contributor ("Commercial Contributor") hereby agrees to defend and indemnify every other Contributor ("Indemnified Contributor") against any losses, damages and costs (collectively "Losses") arising from claims, lawsuits and other legal actions brought by a third party against the Indemnified Contributor to the extent caused by the acts or omissions of such Commercial Contributor in connection with its distribution of the Program in a commercial product offering. The obligations in this section do not apply to any claims or Losses relating to any actual or alleged intellectual property infringement. In order to qualify, an Indemnified Contributor must: a) promptly notify the Commercial Contributor in writing of such claim, and b) allow the Commercial Contributor to control, and cooperate with the Commercial Contributor in, the defense and any related settlement negotiations. The Indemnified Contributor may participate in any such claim at its own expense.
+
+For example, a Contributor might include the Program in a commercial product offering, Product X. That Contributor is then a Commercial Contributor. If that Commercial Contributor then makes performance claims, or offers warranties related to Product X, those performance claims and warranties are such Commercial Contributor's responsibility alone. Under this section, the Commercial Contributor would have to defend claims against the other Contributors related to those performance claims and warranties, and if a court requires any other Contributor to pay any damages as a result, the Commercial Contributor must pay those damages.
+
+5. NO WARRANTY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is solely responsible for determining the appropriateness of using and distributing the Program and assumes all risks associated with its exercise of rights under this Agreement , including but not limited to the risks and costs of program errors, compliance with applicable laws, damage to or loss of data, programs or equipment, and unavailability or interruption of operations.
+
+6. DISCLAIMER OF LIABILITY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+7. GENERAL
+
+If any provision of this Agreement is invalid or unenforceable under applicable law, it shall not affect the validity or enforceability of the remainder of the terms of this Agreement, and without further action by the parties hereto, such provision shall be reformed to the minimum extent necessary to make such provision valid and enforceable.
+
+If Recipient institutes patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Program itself (excluding combinations of the Program with other software or hardware) infringes such Recipient's patent(s), then such Recipient's rights granted under Section 2(b) shall terminate as of the date such litigation is filed.
+
+All Recipient's rights under this Agreement shall terminate if it fails to comply with any of the material terms or conditions of this Agreement and does not cure such failure in a reasonable period of time after becoming aware of such noncompliance. If all Recipient's rights under this Agreement terminate, Recipient agrees to cease use and distribution of the Program as soon as reasonably practicable. However, Recipient's obligations under this Agreement and any licenses granted by Recipient relating to the Program shall continue and survive.
+
+Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation is the initial Agreement Steward. The Eclipse Foundation may assign the responsibility to serve as the Agreement Steward to a suitable separate entity. Each new version of the Agreement will be given a distinguishing version number. The Program (including Contributions) may always be distributed subject to the version of the Agreement under which it was received. In addition, after a new version of the Agreement is published, Contributor may elect to distribute the Program (including its Contributions) under the new version. Except as expressly stated in Sections 2(a) and 2(b) above, Recipient receives no rights or licenses to the intellectual property of any Contributor under this Agreement, whether expressly, by implication, estoppel or otherwise. All rights in the Program not expressly granted under this Agreement are reserved.
+
+This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.

vendor/github.com/eclipse/paho.mqtt.golang/filestore.go

@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"sort"
+	"sync"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+const (
+	msgExt     = ".msg"
+	tmpExt     = ".tmp"
+	corruptExt = ".CORRUPT"
+)
+
+// FileStore implements the store interface using the filesystem to provide
+// true persistence, even across client failure. This is designed to use a
+// single directory per running client. If you are running multiple clients
+// on the same filesystem, you will need to be careful to specify unique
+// store directories for each.
+type FileStore struct {
+	sync.RWMutex
+	directory string
+	opened    bool
+}
+
+// NewFileStore will create a new FileStore which stores its messages in the
+// directory provided.
+func NewFileStore(directory string) *FileStore {
+	store := &FileStore{
+		directory: directory,
+		opened:    false,
+	}
+	return store
+}
+
+// Open will allow the FileStore to be used.
+func (store *FileStore) Open() {
+	store.Lock()
+	defer store.Unlock()
+	// if no store directory was specified in ClientOpts, by default use the
+	// current working directory
+	if store.directory == "" {
+		store.directory, _ = os.Getwd()
+	}
+
+	// if store dir exists, great, otherwise, create it
+	if !exists(store.directory) {
+		perms := os.FileMode(0770)
+		merr := os.MkdirAll(store.directory, perms)
+		chkerr(merr)
+	}
+	store.opened = true
+	DEBUG.Println(STR, "store is opened at", store.directory)
+}
+
+// Close will disallow the FileStore from being used.
+func (store *FileStore) Close() {
+	store.Lock()
+	defer store.Unlock()
+	store.opened = false
+	DEBUG.Println(STR, "store is closed")
+}
+
+// Put will put a message into the store, associated with the provided
+// key value.
+func (store *FileStore) Put(key string, m packets.ControlPacket) {
+	store.Lock()
+	defer store.Unlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use file store, but not open")
+		return
+	}
+	full := fullpath(store.directory, key)
+	write(store.directory, key, m)
+	if !exists(full) {
+		ERROR.Println(STR, "file not created:", full)
+	}
+}
+
+// Get will retrieve a message from the store, the one associated with
+// the provided key value.
+func (store *FileStore) Get(key string) packets.ControlPacket {
+	store.RLock()
+	defer store.RUnlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use file store, but not open")
+		return nil
+	}
+	filepath := fullpath(store.directory, key)
+	if !exists(filepath) {
+		return nil
+	}
+	mfile, oerr := os.Open(filepath)
+	chkerr(oerr)
+	msg, rerr := packets.ReadPacket(mfile)
+	chkerr(mfile.Close())
+
+	// Message was unreadable, return nil
+	if rerr != nil {
+		newpath := corruptpath(store.directory, key)
+		WARN.Println(STR, "corrupted file detected:", rerr.Error(), "archived at:", newpath)
+		os.Rename(filepath, newpath)
+		return nil
+	}
+	return msg
+}
+
+// All will provide a list of all of the keys associated with messages
+// currenly residing in the FileStore.
+func (store *FileStore) All() []string {
+	store.RLock()
+	defer store.RUnlock()
+	return store.all()
+}
+
+// Del will remove the persisted message associated with the provided
+// key from the FileStore.
+func (store *FileStore) Del(key string) {
+	store.Lock()
+	defer store.Unlock()
+	store.del(key)
+}
+
+// Reset will remove all persisted messages from the FileStore.
+func (store *FileStore) Reset() {
+	store.Lock()
+	defer store.Unlock()
+	WARN.Println(STR, "FileStore Reset")
+	for _, key := range store.all() {
+		store.del(key)
+	}
+}
+
+// lockless
+func (store *FileStore) all() []string {
+	var err error
+	var keys []string
+	var files fileInfos
+
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use file store, but not open")
+		return nil
+	}
+
+	files, err = ioutil.ReadDir(store.directory)
+	chkerr(err)
+	sort.Sort(files)
+	for _, f := range files {
+		DEBUG.Println(STR, "file in All():", f.Name())
+		name := f.Name()
+		if name[len(name)-4:len(name)] != msgExt {
+			DEBUG.Println(STR, "skipping file, doesn't have right extension: ", name)
+			continue
+		}
+		key := name[0 : len(name)-4] // remove file extension
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+// lockless
+func (store *FileStore) del(key string) {
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use file store, but not open")
+		return
+	}
+	DEBUG.Println(STR, "store del filepath:", store.directory)
+	DEBUG.Println(STR, "store delete key:", key)
+	filepath := fullpath(store.directory, key)
+	DEBUG.Println(STR, "path of deletion:", filepath)
+	if !exists(filepath) {
+		WARN.Println(STR, "store could not delete key:", key)
+		return
+	}
+	rerr := os.Remove(filepath)
+	chkerr(rerr)
+	DEBUG.Println(STR, "del msg:", key)
+	if exists(filepath) {
+		ERROR.Println(STR, "file not deleted:", filepath)
+	}
+}
+
+func fullpath(store string, key string) string {
+	p := path.Join(store, key+msgExt)
+	return p
+}
+
+func tmppath(store string, key string) string {
+	p := path.Join(store, key+tmpExt)
+	return p
+}
+
+func corruptpath(store string, key string) string {
+	p := path.Join(store, key+corruptExt)
+	return p
+}
+
+// create file called "X.[messageid].tmp" located in the store
+// the contents of the file is the bytes of the message, then
+// rename it to "X.[messageid].msg", overwriting any existing
+// message with the same id
+// X will be 'i' for inbound messages, and O for outbound messages
+func write(store, key string, m packets.ControlPacket) {
+	temppath := tmppath(store, key)
+	f, err := os.Create(temppath)
+	chkerr(err)
+	werr := m.Write(f)
+	chkerr(werr)
+	cerr := f.Close()
+	chkerr(cerr)
+	rerr := os.Rename(temppath, fullpath(store, key))
+	chkerr(rerr)
+}
+
+func exists(file string) bool {
+	if _, err := os.Stat(file); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+		chkerr(err)
+	}
+	return true
+}
+
+type fileInfos []os.FileInfo
+
+func (f fileInfos) Len() int {
+	return len(f)
+}
+
+func (f fileInfos) Swap(i, j int) {
+	f[i], f[j] = f[j], f[i]
+}
+
+func (f fileInfos) Less(i, j int) bool {
+	return f[i].ModTime().Before(f[j].ModTime())
+}

vendor/github.com/eclipse/paho.mqtt.golang/memstore.go

@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"sync"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+// MemoryStore implements the store interface to provide a "persistence"
+// mechanism wholly stored in memory. This is only useful for
+// as long as the client instance exists.
+type MemoryStore struct {
+	sync.RWMutex
+	messages map[string]packets.ControlPacket
+	opened   bool
+}
+
+// NewMemoryStore returns a pointer to a new instance of
+// MemoryStore, the instance is not initialized and ready to
+// use until Open() has been called on it.
+func NewMemoryStore() *MemoryStore {
+	store := &MemoryStore{
+		messages: make(map[string]packets.ControlPacket),
+		opened:   false,
+	}
+	return store
+}
+
+// Open initializes a MemoryStore instance.
+func (store *MemoryStore) Open() {
+	store.Lock()
+	defer store.Unlock()
+	store.opened = true
+	DEBUG.Println(STR, "memorystore initialized")
+}
+
+// Put takes a key and a pointer to a Message and stores the
+// message.
+func (store *MemoryStore) Put(key string, message packets.ControlPacket) {
+	store.Lock()
+	defer store.Unlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use memory store, but not open")
+		return
+	}
+	store.messages[key] = message
+}
+
+// Get takes a key and looks in the store for a matching Message
+// returning either the Message pointer or nil.
+func (store *MemoryStore) Get(key string) packets.ControlPacket {
+	store.RLock()
+	defer store.RUnlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use memory store, but not open")
+		return nil
+	}
+	mid := mIDFromKey(key)
+	m := store.messages[key]
+	if m == nil {
+		CRITICAL.Println(STR, "memorystore get: message", mid, "not found")
+	} else {
+		DEBUG.Println(STR, "memorystore get: message", mid, "found")
+	}
+	return m
+}
+
+// All returns a slice of strings containing all the keys currently
+// in the MemoryStore.
+func (store *MemoryStore) All() []string {
+	store.RLock()
+	defer store.RUnlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use memory store, but not open")
+		return nil
+	}
+	keys := []string{}
+	for k := range store.messages {
+		keys = append(keys, k)
+	}
+	return keys
+}
+
+// Del takes a key, searches the MemoryStore and if the key is found
+// deletes the Message pointer associated with it.
+func (store *MemoryStore) Del(key string) {
+	store.Lock()
+	defer store.Unlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to use memory store, but not open")
+		return
+	}
+	mid := mIDFromKey(key)
+	m := store.messages[key]
+	if m == nil {
+		WARN.Println(STR, "memorystore del: message", mid, "not found")
+	} else {
+		delete(store.messages, key)
+		DEBUG.Println(STR, "memorystore del: message", mid, "was deleted")
+	}
+}
+
+// Close will disallow modifications to the state of the store.
+func (store *MemoryStore) Close() {
+	store.Lock()
+	defer store.Unlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to close memory store, but not open")
+		return
+	}
+	store.opened = false
+	DEBUG.Println(STR, "memorystore closed")
+}
+
+// Reset eliminates all persisted message data in the store.
+func (store *MemoryStore) Reset() {
+	store.Lock()
+	defer store.Unlock()
+	if !store.opened {
+		ERROR.Println(STR, "Trying to reset memory store, but not open")
+	}
+	store.messages = make(map[string]packets.ControlPacket)
+	WARN.Println(STR, "memorystore wiped")
+}

vendor/github.com/eclipse/paho.mqtt.golang/message.go

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"net/url"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+	"sync"
+)
+
+// Message defines the externals that a message implementation must support
+// these are received messages that are passed to the callbacks, not internal
+// messages
+type Message interface {
+	Duplicate() bool
+	Qos() byte
+	Retained() bool
+	Topic() string
+	MessageID() uint16
+	Payload() []byte
+	Ack()
+}
+
+type message struct {
+	duplicate bool
+	qos       byte
+	retained  bool
+	topic     string
+	messageID uint16
+	payload   []byte
+	once      sync.Once
+	ack       func()
+}
+
+func (m *message) Duplicate() bool {
+	return m.duplicate
+}
+
+func (m *message) Qos() byte {
+	return m.qos
+}
+
+func (m *message) Retained() bool {
+	return m.retained
+}
+
+func (m *message) Topic() string {
+	return m.topic
+}
+
+func (m *message) MessageID() uint16 {
+	return m.messageID
+}
+
+func (m *message) Payload() []byte {
+	return m.payload
+}
+
+func (m *message) Ack() {
+	m.once.Do(m.ack)
+}
+
+func messageFromPublish(p *packets.PublishPacket, ack func()) Message {
+	return &message{
+		duplicate: p.Dup,
+		qos:       p.Qos,
+		retained:  p.Retain,
+		topic:     p.TopicName,
+		messageID: p.MessageID,
+		payload:   p.Payload,
+		ack:       ack,
+	}
+}
+
+func newConnectMsgFromOptions(options *ClientOptions, broker *url.URL) *packets.ConnectPacket {
+	m := packets.NewControlPacket(packets.Connect).(*packets.ConnectPacket)
+
+	m.CleanSession = options.CleanSession
+	m.WillFlag = options.WillEnabled
+	m.WillRetain = options.WillRetained
+	m.ClientIdentifier = options.ClientID
+
+	if options.WillEnabled {
+		m.WillQos = options.WillQos
+		m.WillTopic = options.WillTopic
+		m.WillMessage = options.WillPayload
+	}
+
+	username := options.Username
+	password := options.Password
+	if broker.User != nil {
+		username = broker.User.Username()
+		if pwd, ok := broker.User.Password(); ok {
+			password = pwd
+		}
+	}
+	if options.CredentialsProvider != nil {
+		username, password = options.CredentialsProvider()
+	}
+
+	if username != "" {
+		m.UsernameFlag = true
+		m.Username = username
+		//mustn't have password without user as well
+		if password != "" {
+			m.PasswordFlag = true
+			m.Password = []byte(password)
+		}
+	}
+
+	m.Keepalive = uint16(options.KeepAlive)
+
+	return m
+}

vendor/github.com/eclipse/paho.mqtt.golang/messageids.go

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+// MId is 16 bit message id as specified by the MQTT spec.
+// In general, these values should not be depended upon by
+// the client application.
+type MId uint16
+
+type messageIds struct {
+	sync.RWMutex
+	index map[uint16]tokenCompletor
+}
+
+const (
+	midMin uint16 = 1
+	midMax uint16 = 65535
+)
+
+func (mids *messageIds) cleanUp() {
+	mids.Lock()
+	for _, token := range mids.index {
+		switch token.(type) {
+		case *PublishToken:
+			token.setError(fmt.Errorf("Connection lost before Publish completed"))
+		case *SubscribeToken:
+			token.setError(fmt.Errorf("Connection lost before Subscribe completed"))
+		case *UnsubscribeToken:
+			token.setError(fmt.Errorf("Connection lost before Unsubscribe completed"))
+		case nil:
+			continue
+		}
+		token.flowComplete()
+	}
+	mids.index = make(map[uint16]tokenCompletor)
+	mids.Unlock()
+	DEBUG.Println(MID, "cleaned up")
+}
+
+func (mids *messageIds) freeID(id uint16) {
+	mids.Lock()
+	delete(mids.index, id)
+	mids.Unlock()
+}
+
+func (mids *messageIds) claimID(token tokenCompletor, id uint16) {
+	mids.Lock()
+	defer mids.Unlock()
+	if _, ok := mids.index[id]; !ok {
+		mids.index[id] = token
+	} else {
+		old := mids.index[id]
+		old.flowComplete()
+		mids.index[id] = token
+	}
+}
+
+func (mids *messageIds) getID(t tokenCompletor) uint16 {
+	mids.Lock()
+	defer mids.Unlock()
+	for i := midMin; i < midMax; i++ {
+		if _, ok := mids.index[i]; !ok {
+			mids.index[i] = t
+			return i
+		}
+	}
+	return 0
+}
+
+func (mids *messageIds) getToken(id uint16) tokenCompletor {
+	mids.RLock()
+	defer mids.RUnlock()
+	if token, ok := mids.index[id]; ok {
+		return token
+	}
+	return &DummyToken{id: id}
+}
+
+type DummyToken struct {
+	id uint16
+}
+
+func (d *DummyToken) Wait() bool {
+	return true
+}
+
+func (d *DummyToken) WaitTimeout(t time.Duration) bool {
+	return true
+}
+
+func (d *DummyToken) flowComplete() {
+	ERROR.Printf("A lookup for token %d returned nil\n", d.id)
+}
+
+func (d *DummyToken) Error() error {
+	return nil
+}
+
+func (d *DummyToken) setError(e error) {}

vendor/github.com/eclipse/paho.mqtt.golang/net.go

@@ -0,0 +1,355 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"reflect"
+	"sync/atomic"
+	"time"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+	"golang.org/x/net/proxy"
+	"golang.org/x/net/websocket"
+)
+
+func signalError(c chan<- error, err error) {
+	select {
+	case c <- err:
+	default:
+	}
+}
+
+func openConnection(uri *url.URL, tlsc *tls.Config, timeout time.Duration, headers http.Header) (net.Conn, error) {
+	switch uri.Scheme {
+	case "ws":
+		config, _ := websocket.NewConfig(uri.String(), fmt.Sprintf("http://%s", uri.Host))
+		config.Protocol = []string{"mqtt"}
+		config.Header = headers
+		config.Dialer = &net.Dialer{Timeout: timeout}
+		conn, err := websocket.DialConfig(config)
+		if err != nil {
+			return nil, err
+		}
+		conn.PayloadType = websocket.BinaryFrame
+		return conn, err
+	case "wss":
+		config, _ := websocket.NewConfig(uri.String(), fmt.Sprintf("https://%s", uri.Host))
+		config.Protocol = []string{"mqtt"}
+		config.TlsConfig = tlsc
+		config.Header = headers
+		config.Dialer = &net.Dialer{Timeout: timeout}
+		conn, err := websocket.DialConfig(config)
+		if err != nil {
+			return nil, err
+		}
+		conn.PayloadType = websocket.BinaryFrame
+		return conn, err
+	case "tcp":
+		allProxy := os.Getenv("all_proxy")
+		if len(allProxy) == 0 {
+			conn, err := net.DialTimeout("tcp", uri.Host, timeout)
+			if err != nil {
+				return nil, err
+			}
+			return conn, nil
+		}
+		proxyDialer := proxy.FromEnvironment()
+
+		conn, err := proxyDialer.Dial("tcp", uri.Host)
+		if err != nil {
+			return nil, err
+		}
+		return conn, nil
+	case "unix":
+		conn, err := net.DialTimeout("unix", uri.Host, timeout)
+		if err != nil {
+			return nil, err
+		}
+		return conn, nil
+	case "ssl":
+		fallthrough
+	case "tls":
+		fallthrough
+	case "tcps":
+		allProxy := os.Getenv("all_proxy")
+		if len(allProxy) == 0 {
+			conn, err := tls.DialWithDialer(&net.Dialer{Timeout: timeout}, "tcp", uri.Host, tlsc)
+			if err != nil {
+				return nil, err
+			}
+			return conn, nil
+		}
+		proxyDialer := proxy.FromEnvironment()
+
+		conn, err := proxyDialer.Dial("tcp", uri.Host)
+		if err != nil {
+			return nil, err
+		}
+
+		tlsConn := tls.Client(conn, tlsc)
+
+		err = tlsConn.Handshake()
+		if err != nil {
+			conn.Close()
+			return nil, err
+		}
+
+		return tlsConn, nil
+	}
+	return nil, errors.New("Unknown protocol")
+}
+
+// actually read incoming messages off the wire
+// send Message object into ibound channel
+func incoming(c *client) {
+	var err error
+	var cp packets.ControlPacket
+
+	defer c.workers.Done()
+
+	DEBUG.Println(NET, "incoming started")
+
+	for {
+		if cp, err = packets.ReadPacket(c.conn); err != nil {
+			break
+		}
+		DEBUG.Println(NET, "Received Message")
+		select {
+		case c.ibound <- cp:
+			// Notify keepalive logic that we recently received a packet
+			if c.options.KeepAlive != 0 {
+				c.lastReceived.Store(time.Now())
+			}
+		case <-c.stop:
+			// This avoids a deadlock should a message arrive while shutting down.
+			// In that case the "reader" of c.ibound might already be gone
+			WARN.Println(NET, "incoming dropped a received message during shutdown")
+			break
+		}
+	}
+	// We received an error on read.
+	// If disconnect is in progress, swallow error and return
+	select {
+	case <-c.stop:
+		DEBUG.Println(NET, "incoming stopped")
+		return
+	// Not trying to disconnect, send the error to the errors channel
+	default:
+		ERROR.Println(NET, "incoming stopped with error", err)
+		signalError(c.errors, err)
+		return
+	}
+}
+
+// receive a Message object on obound, and then
+// actually send outgoing message to the wire
+func outgoing(c *client) {
+	defer c.workers.Done()
+	DEBUG.Println(NET, "outgoing started")
+
+	for {
+		DEBUG.Println(NET, "outgoing waiting for an outbound message")
+		select {
+		case <-c.stop:
+			DEBUG.Println(NET, "outgoing stopped")
+			return
+		case pub := <-c.obound:
+			msg := pub.p.(*packets.PublishPacket)
+
+			if c.options.WriteTimeout > 0 {
+				c.conn.SetWriteDeadline(time.Now().Add(c.options.WriteTimeout))
+			}
+
+			if err := msg.Write(c.conn); err != nil {
+				ERROR.Println(NET, "outgoing stopped with error", err)
+				pub.t.setError(err)
+				signalError(c.errors, err)
+				return
+			}
+
+			if c.options.WriteTimeout > 0 {
+				// If we successfully wrote, we don't want the timeout to happen during an idle period
+				// so we reset it to infinite.
+				c.conn.SetWriteDeadline(time.Time{})
+			}
+
+			if msg.Qos == 0 {
+				pub.t.flowComplete()
+			}
+			DEBUG.Println(NET, "obound wrote msg, id:", msg.MessageID)
+		case msg := <-c.oboundP:
+			switch msg.p.(type) {
+			case *packets.SubscribePacket:
+				msg.p.(*packets.SubscribePacket).MessageID = c.getID(msg.t)
+			case *packets.UnsubscribePacket:
+				msg.p.(*packets.UnsubscribePacket).MessageID = c.getID(msg.t)
+			}
+			DEBUG.Println(NET, "obound priority msg to write, type", reflect.TypeOf(msg.p))
+			if err := msg.p.Write(c.conn); err != nil {
+				ERROR.Println(NET, "outgoing stopped with error", err)
+				if msg.t != nil {
+					msg.t.setError(err)
+				}
+				signalError(c.errors, err)
+				return
+			}
+			switch msg.p.(type) {
+			case *packets.DisconnectPacket:
+				msg.t.(*DisconnectToken).flowComplete()
+				DEBUG.Println(NET, "outbound wrote disconnect, stopping")
+				return
+			}
+		}
+		// Reset ping timer after sending control packet.
+		if c.options.KeepAlive != 0 {
+			c.lastSent.Store(time.Now())
+		}
+	}
+}
+
+// receive Message objects on ibound
+// store messages if necessary
+// send replies on obound
+// delete messages from store if necessary
+func alllogic(c *client) {
+	defer c.workers.Done()
+	DEBUG.Println(NET, "logic started")
+
+	for {
+		DEBUG.Println(NET, "logic waiting for msg on ibound")
+
+		select {
+		case msg := <-c.ibound:
+			DEBUG.Println(NET, "logic got msg on ibound")
+			persistInbound(c.persist, msg)
+			switch m := msg.(type) {
+			case *packets.PingrespPacket:
+				DEBUG.Println(NET, "received pingresp")
+				atomic.StoreInt32(&c.pingOutstanding, 0)
+			case *packets.SubackPacket:
+				DEBUG.Println(NET, "received suback, id:", m.MessageID)
+				token := c.getToken(m.MessageID)
+				switch t := token.(type) {
+				case *SubscribeToken:
+					DEBUG.Println(NET, "granted qoss", m.ReturnCodes)
+					for i, qos := range m.ReturnCodes {
+						t.subResult[t.subs[i]] = qos
+					}
+				}
+				token.flowComplete()
+				c.freeID(m.MessageID)
+			case *packets.UnsubackPacket:
+				DEBUG.Println(NET, "received unsuback, id:", m.MessageID)
+				c.getToken(m.MessageID).flowComplete()
+				c.freeID(m.MessageID)
+			case *packets.PublishPacket:
+				DEBUG.Println(NET, "received publish, msgId:", m.MessageID)
+				DEBUG.Println(NET, "putting msg on onPubChan")
+				switch m.Qos {
+				case 2:
+					c.incomingPubChan <- m
+					DEBUG.Println(NET, "done putting msg on incomingPubChan")
+				case 1:
+					c.incomingPubChan <- m
+					DEBUG.Println(NET, "done putting msg on incomingPubChan")
+				case 0:
+					select {
+					case c.incomingPubChan <- m:
+					case <-c.stop:
+					}
+					DEBUG.Println(NET, "done putting msg on incomingPubChan")
+				}
+			case *packets.PubackPacket:
+				DEBUG.Println(NET, "received puback, id:", m.MessageID)
+				// c.receipts.get(msg.MsgId()) <- Receipt{}
+				// c.receipts.end(msg.MsgId())
+				c.getToken(m.MessageID).flowComplete()
+				c.freeID(m.MessageID)
+			case *packets.PubrecPacket:
+				DEBUG.Println(NET, "received pubrec, id:", m.MessageID)
+				prel := packets.NewControlPacket(packets.Pubrel).(*packets.PubrelPacket)
+				prel.MessageID = m.MessageID
+				select {
+				case c.oboundP <- &PacketAndToken{p: prel, t: nil}:
+				case <-c.stop:
+				}
+			case *packets.PubrelPacket:
+				DEBUG.Println(NET, "received pubrel, id:", m.MessageID)
+				pc := packets.NewControlPacket(packets.Pubcomp).(*packets.PubcompPacket)
+				pc.MessageID = m.MessageID
+				persistOutbound(c.persist, pc)
+				select {
+				case c.oboundP <- &PacketAndToken{p: pc, t: nil}:
+				case <-c.stop:
+				}
+			case *packets.PubcompPacket:
+				DEBUG.Println(NET, "received pubcomp, id:", m.MessageID)
+				c.getToken(m.MessageID).flowComplete()
+				c.freeID(m.MessageID)
+			}
+		case <-c.stop:
+			WARN.Println(NET, "logic stopped")
+			return
+		}
+	}
+}
+
+func (c *client) ackFunc(packet *packets.PublishPacket) func() {
+	return func() {
+		switch packet.Qos {
+		case 2:
+			pr := packets.NewControlPacket(packets.Pubrec).(*packets.PubrecPacket)
+			pr.MessageID = packet.MessageID
+			DEBUG.Println(NET, "putting pubrec msg on obound")
+			select {
+			case c.oboundP <- &PacketAndToken{p: pr, t: nil}:
+			case <-c.stop:
+			}
+			DEBUG.Println(NET, "done putting pubrec msg on obound")
+		case 1:
+			pa := packets.NewControlPacket(packets.Puback).(*packets.PubackPacket)
+			pa.MessageID = packet.MessageID
+			DEBUG.Println(NET, "putting puback msg on obound")
+			persistOutbound(c.persist, pa)
+			select {
+			case c.oboundP <- &PacketAndToken{p: pa, t: nil}:
+			case <-c.stop:
+			}
+			DEBUG.Println(NET, "done putting puback msg on obound")
+		case 0:
+			// do nothing, since there is no need to send an ack packet back
+		}
+	}
+}
+
+func errorWatch(c *client) {
+	defer c.workers.Done()
+	select {
+	case <-c.stop:
+		WARN.Println(NET, "errorWatch stopped")
+		return
+	case err := <-c.errors:
+		ERROR.Println(NET, "error triggered, stopping")
+		go c.internalConnLost(err)
+		return
+	}
+}

vendor/github.com/eclipse/paho.mqtt.golang/notice.html

@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="ISO-8859-1" ?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
+<title>Eclipse Foundation Software User Agreement</title>
+</head>
+
+<body lang="EN-US">
+<h2>Eclipse Foundation Software User Agreement</h2>
+<p>February 1, 2011</p>
+
+<h3>Usage Of Content</h3>
+
+<p>THE ECLIPSE FOUNDATION MAKES AVAILABLE SOFTWARE, DOCUMENTATION, INFORMATION AND/OR OTHER MATERIALS FOR OPEN SOURCE PROJECTS
+   (COLLECTIVELY &quot;CONTENT&quot;).  USE OF THE CONTENT IS GOVERNED BY THE TERMS AND CONDITIONS OF THIS AGREEMENT AND/OR THE TERMS AND
+   CONDITIONS OF LICENSE AGREEMENTS OR NOTICES INDICATED OR REFERENCED BELOW.  BY USING THE CONTENT, YOU AGREE THAT YOUR USE
+   OF THE CONTENT IS GOVERNED BY THIS AGREEMENT AND/OR THE TERMS AND CONDITIONS OF ANY APPLICABLE LICENSE AGREEMENTS OR
+   NOTICES INDICATED OR REFERENCED BELOW.  IF YOU DO NOT AGREE TO THE TERMS AND CONDITIONS OF THIS AGREEMENT AND THE TERMS AND
+   CONDITIONS OF ANY APPLICABLE LICENSE AGREEMENTS OR NOTICES INDICATED OR REFERENCED BELOW, THEN YOU MAY NOT USE THE CONTENT.</p>
+
+<h3>Applicable Licenses</h3>
+
+<p>Unless otherwise indicated, all Content made available by the Eclipse Foundation is provided to you under the terms and conditions of the Eclipse Public License Version 1.0
+   (&quot;EPL&quot;).  A copy of the EPL is provided with this Content and is also available at <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a>.
+   For purposes of the EPL, &quot;Program&quot; will mean the Content.</p>
+
+<p>Content includes, but is not limited to, source code, object code, documentation and other files maintained in the Eclipse Foundation source code
+   repository (&quot;Repository&quot;) in software modules (&quot;Modules&quot;) and made available as downloadable archives (&quot;Downloads&quot;).</p>
+
+<ul>
+       <li>Content may be structured and packaged into modules to facilitate delivering, extending, and upgrading the Content.  Typical modules may include plug-ins (&quot;Plug-ins&quot;), plug-in fragments (&quot;Fragments&quot;), and features (&quot;Features&quot;).</li>
+       <li>Each Plug-in or Fragment may be packaged as a sub-directory or JAR (Java&trade; ARchive) in a directory named &quot;plugins&quot;.</li>
+       <li>A Feature is a bundle of one or more Plug-ins and/or Fragments and associated material.  Each Feature may be packaged as a sub-directory in a directory named &quot;features&quot;.  Within a Feature, files named &quot;feature.xml&quot; may contain a list of the names and version numbers of the Plug-ins
+      and/or Fragments associated with that Feature.</li>
+       <li>Features may also include other Features (&quot;Included Features&quot;). Within a Feature, files named &quot;feature.xml&quot; may contain a list of the names and version numbers of Included Features.</li>
+</ul>
+
+<p>The terms and conditions governing Plug-ins and Fragments should be contained in files named &quot;about.html&quot; (&quot;Abouts&quot;). The terms and conditions governing Features and
+Included Features should be contained in files named &quot;license.html&quot; (&quot;Feature Licenses&quot;).  Abouts and Feature Licenses may be located in any directory of a Download or Module
+including, but not limited to the following locations:</p>
+
+<ul>
+       <li>The top-level (root) directory</li>
+       <li>Plug-in and Fragment directories</li>
+       <li>Inside Plug-ins and Fragments packaged as JARs</li>
+       <li>Sub-directories of the directory named &quot;src&quot; of certain Plug-ins</li>
+       <li>Feature directories</li>
+</ul>
+
+<p>Note: if a Feature made available by the Eclipse Foundation is installed using the Provisioning Technology (as defined below), you must agree to a license (&quot;Feature Update License&quot;) during the
+installation process.  If the Feature contains Included Features, the Feature Update License should either provide you with the terms and conditions governing the Included Features or
+inform you where you can locate them.  Feature Update Licenses may be found in the &quot;license&quot; property of files named &quot;feature.properties&quot; found within a Feature.
+Such Abouts, Feature Licenses, and Feature Update Licenses contain the terms and conditions (or references to such terms and conditions) that govern your use of the associated Content in
+that directory.</p>
+
+<p>THE ABOUTS, FEATURE LICENSES, AND FEATURE UPDATE LICENSES MAY REFER TO THE EPL OR OTHER LICENSE AGREEMENTS, NOTICES OR TERMS AND CONDITIONS.  SOME OF THESE
+OTHER LICENSE AGREEMENTS MAY INCLUDE (BUT ARE NOT LIMITED TO):</p>
+
+<ul>
+       <li>Eclipse Distribution License Version 1.0 (available at <a href="http://www.eclipse.org/licenses/edl-v10.html">http://www.eclipse.org/licenses/edl-v1.0.html</a>)</li>
+       <li>Common Public License Version 1.0 (available at <a href="http://www.eclipse.org/legal/cpl-v10.html">http://www.eclipse.org/legal/cpl-v10.html</a>)</li>
+       <li>Apache Software License 1.1 (available at <a href="http://www.apache.org/licenses/LICENSE">http://www.apache.org/licenses/LICENSE</a>)</li>
+       <li>Apache Software License 2.0 (available at <a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a>)</li>
+       <li>Metro Link Public License 1.00 (available at <a href="http://www.opengroup.org/openmotif/supporters/metrolink/license.html">http://www.opengroup.org/openmotif/supporters/metrolink/license.html</a>)</li>
+       <li>Mozilla Public License Version 1.1 (available at <a href="http://www.mozilla.org/MPL/MPL-1.1.html">http://www.mozilla.org/MPL/MPL-1.1.html</a>)</li>
+</ul>
+
+<p>IT IS YOUR OBLIGATION TO READ AND ACCEPT ALL SUCH TERMS AND CONDITIONS PRIOR TO USE OF THE CONTENT.  If no About, Feature License, or Feature Update License is provided, please
+contact the Eclipse Foundation to determine what terms and conditions govern that particular Content.</p>
+
+
+<h3>Use of Provisioning Technology</h3>
+
+<p>The Eclipse Foundation makes available provisioning software, examples of which include, but are not limited to, p2 and the Eclipse
+   Update Manager (&quot;Provisioning Technology&quot;) for the purpose of allowing users to install software, documentation, information and/or
+   other materials (collectively &quot;Installable Software&quot;). This capability is provided with the intent of allowing such users to
+   install, extend and update Eclipse-based products. Information about packaging Installable Software is available at <a
+       href="http://eclipse.org/equinox/p2/repository_packaging.html">http://eclipse.org/equinox/p2/repository_packaging.html</a>
+   (&quot;Specification&quot;).</p>
+
+<p>You may use Provisioning Technology to allow other parties to install Installable Software. You shall be responsible for enabling the
+   applicable license agreements relating to the Installable Software to be presented to, and accepted by, the users of the Provisioning Technology
+   in accordance with the Specification. By using Provisioning Technology in such a manner and making it available in accordance with the
+   Specification, you further acknowledge your agreement to, and the acquisition of all necessary rights to permit the following:</p>
+
+<ol>
+       <li>A series of actions may occur (&quot;Provisioning Process&quot;) in which a user may execute the Provisioning Technology
+       on a machine (&quot;Target Machine&quot;) with the intent of installing, extending or updating the functionality of an Eclipse-based
+       product.</li>
+       <li>During the Provisioning Process, the Provisioning Technology may cause third party Installable Software or a portion thereof to be
+       accessed and copied to the Target Machine.</li>
+       <li>Pursuant to the Specification, you will provide to the user the terms and conditions that govern the use of the Installable
+       Software (&quot;Installable Software Agreement&quot;) and such Installable Software Agreement shall be accessed from the Target
+       Machine in accordance with the Specification. Such Installable Software Agreement must inform the user of the terms and conditions that govern
+       the Installable Software and must solicit acceptance by the end user in the manner prescribed in such Installable Software Agreement. Upon such
+       indication of agreement by the user, the provisioning Technology will complete installation of the Installable Software.</li>
+</ol>
+
+<h3>Cryptography</h3>
+
+<p>Content may contain encryption software. The country in which you are currently may have restrictions on the import, possession, and use, and/or re-export to
+   another country, of encryption software. BEFORE using any encryption software, please check the country's laws, regulations and policies concerning the import,
+   possession, or use, and re-export of encryption software, to see if this is permitted.</p>
+
+<p><small>Java and all Java-based trademarks are trademarks of Oracle Corporation in the United States, other countries, or both.</small></p>
+</body>
+</html>

vendor/github.com/eclipse/paho.mqtt.golang/oops.go

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+func chkerr(e error) {
+	if e != nil {
+		panic(e)
+	}
+}

vendor/github.com/eclipse/paho.mqtt.golang/options.go

@@ -0,0 +1,340 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+// Portions copyright © 2018 TIBCO Software Inc.
+
+package mqtt
+
+import (
+	"crypto/tls"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+)
+
+// CredentialsProvider allows the username and password to be updated
+// before reconnecting. It should return the current username and password.
+type CredentialsProvider func() (username string, password string)
+
+// MessageHandler is a callback type which can be set to be
+// executed upon the arrival of messages published to topics
+// to which the client is subscribed.
+type MessageHandler func(Client, Message)
+
+// ConnectionLostHandler is a callback type which can be set to be
+// executed upon an unintended disconnection from the MQTT broker.
+// Disconnects caused by calling Disconnect or ForceDisconnect will
+// not cause an OnConnectionLost callback to execute.
+type ConnectionLostHandler func(Client, error)
+
+// OnConnectHandler is a callback that is called when the client
+// state changes from unconnected/disconnected to connected. Both
+// at initial connection and on reconnection
+type OnConnectHandler func(Client)
+
+// ClientOptions contains configurable options for an Client.
+type ClientOptions struct {
+	Servers                 []*url.URL
+	ClientID                string
+	Username                string
+	Password                string
+	CredentialsProvider     CredentialsProvider
+	CleanSession            bool
+	Order                   bool
+	WillEnabled             bool
+	WillTopic               string
+	WillPayload             []byte
+	WillQos                 byte
+	WillRetained            bool
+	ProtocolVersion         uint
+	protocolVersionExplicit bool
+	TLSConfig               *tls.Config
+	KeepAlive               int64
+	PingTimeout             time.Duration
+	ConnectTimeout          time.Duration
+	MaxReconnectInterval    time.Duration
+	AutoReconnect           bool
+	Store                   Store
+	DefaultPublishHandler   MessageHandler
+	OnConnect               OnConnectHandler
+	OnConnectionLost        ConnectionLostHandler
+	WriteTimeout            time.Duration
+	MessageChannelDepth     uint
+	ResumeSubs              bool
+	HTTPHeaders             http.Header
+}
+
+// NewClientOptions will create a new ClientClientOptions type with some
+// default values.
+//   Port: 1883
+//   CleanSession: True
+//   Order: True
+//   KeepAlive: 30 (seconds)
+//   ConnectTimeout: 30 (seconds)
+//   MaxReconnectInterval 10 (minutes)
+//   AutoReconnect: True
+func NewClientOptions() *ClientOptions {
+	o := &ClientOptions{
+		Servers:                 nil,
+		ClientID:                "",
+		Username:                "",
+		Password:                "",
+		CleanSession:            true,
+		Order:                   true,
+		WillEnabled:             false,
+		WillTopic:               "",
+		WillPayload:             nil,
+		WillQos:                 0,
+		WillRetained:            false,
+		ProtocolVersion:         0,
+		protocolVersionExplicit: false,
+		KeepAlive:               30,
+		PingTimeout:             10 * time.Second,
+		ConnectTimeout:          30 * time.Second,
+		MaxReconnectInterval:    10 * time.Minute,
+		AutoReconnect:           true,
+		Store:                   nil,
+		OnConnect:               nil,
+		OnConnectionLost:        DefaultConnectionLostHandler,
+		WriteTimeout:            0, // 0 represents timeout disabled
+		MessageChannelDepth:     100,
+		ResumeSubs:              false,
+		HTTPHeaders:             make(map[string][]string),
+	}
+	return o
+}
+
+// AddBroker adds a broker URI to the list of brokers to be used. The format should be
+// scheme://host:port
+// Where "scheme" is one of "tcp", "ssl", or "ws", "host" is the ip-address (or hostname)
+// and "port" is the port on which the broker is accepting connections.
+//
+// Default values for hostname is "127.0.0.1", for schema is "tcp://".
+//
+// An example broker URI would look like: tcp://foobar.com:1883
+func (o *ClientOptions) AddBroker(server string) *ClientOptions {
+	if len(server) > 0 && server[0] == ':' {
+		server = "127.0.0.1" + server
+	}
+	if !strings.Contains(server, "://") {
+		server = "tcp://" + server
+	}
+	brokerURI, err := url.Parse(server)
+	if err != nil {
+		ERROR.Println(CLI, "Failed to parse %q broker address: %s", server, err)
+		return o
+	}
+	o.Servers = append(o.Servers, brokerURI)
+	return o
+}
+
+// SetResumeSubs will enable resuming of stored (un)subscribe messages when connecting
+// but not reconnecting if CleanSession is false. Otherwise these messages are discarded.
+func (o *ClientOptions) SetResumeSubs(resume bool) *ClientOptions {
+	o.ResumeSubs = resume
+	return o
+}
+
+// SetClientID will set the client id to be used by this client when
+// connecting to the MQTT broker. According to the MQTT v3.1 specification,
+// a client id mus be no longer than 23 characters.
+func (o *ClientOptions) SetClientID(id string) *ClientOptions {
+	o.ClientID = id
+	return o
+}
+
+// SetUsername will set the username to be used by this client when connecting
+// to the MQTT broker. Note: without the use of SSL/TLS, this information will
+// be sent in plaintext accross the wire.
+func (o *ClientOptions) SetUsername(u string) *ClientOptions {
+	o.Username = u
+	return o
+}
+
+// SetPassword will set the password to be used by this client when connecting
+// to the MQTT broker. Note: without the use of SSL/TLS, this information will
+// be sent in plaintext accross the wire.
+func (o *ClientOptions) SetPassword(p string) *ClientOptions {
+	o.Password = p
+	return o
+}
+
+// SetCredentialsProvider will set a method to be called by this client when
+// connecting to the MQTT broker that provide the current username and password.
+// Note: without the use of SSL/TLS, this information will be sent
+// in plaintext accross the wire.
+func (o *ClientOptions) SetCredentialsProvider(p CredentialsProvider) *ClientOptions {
+	o.CredentialsProvider = p
+	return o
+}
+
+// SetCleanSession will set the "clean session" flag in the connect message
+// when this client connects to an MQTT broker. By setting this flag, you are
+// indicating that no messages saved by the broker for this client should be
+// delivered. Any messages that were going to be sent by this client before
+// diconnecting previously but didn't will not be sent upon connecting to the
+// broker.
+func (o *ClientOptions) SetCleanSession(clean bool) *ClientOptions {
+	o.CleanSession = clean
+	return o
+}
+
+// SetOrderMatters will set the message routing to guarantee order within
+// each QoS level. By default, this value is true. If set to false,
+// this flag indicates that messages can be delivered asynchronously
+// from the client to the application and possibly arrive out of order.
+func (o *ClientOptions) SetOrderMatters(order bool) *ClientOptions {
+	o.Order = order
+	return o
+}
+
+// SetTLSConfig will set an SSL/TLS configuration to be used when connecting
+// to an MQTT broker. Please read the official Go documentation for more
+// information.
+func (o *ClientOptions) SetTLSConfig(t *tls.Config) *ClientOptions {
+	o.TLSConfig = t
+	return o
+}
+
+// SetStore will set the implementation of the Store interface
+// used to provide message persistence in cases where QoS levels
+// QoS_ONE or QoS_TWO are used. If no store is provided, then the
+// client will use MemoryStore by default.
+func (o *ClientOptions) SetStore(s Store) *ClientOptions {
+	o.Store = s
+	return o
+}
+
+// SetKeepAlive will set the amount of time (in seconds) that the client
+// should wait before sending a PING request to the broker. This will
+// allow the client to know that a connection has not been lost with the
+// server.
+func (o *ClientOptions) SetKeepAlive(k time.Duration) *ClientOptions {
+	o.KeepAlive = int64(k / time.Second)
+	return o
+}
+
+// SetPingTimeout will set the amount of time (in seconds) that the client
+// will wait after sending a PING request to the broker, before deciding
+// that the connection has been lost. Default is 10 seconds.
+func (o *ClientOptions) SetPingTimeout(k time.Duration) *ClientOptions {
+	o.PingTimeout = k
+	return o
+}
+
+// SetProtocolVersion sets the MQTT version to be used to connect to the
+// broker. Legitimate values are currently 3 - MQTT 3.1 or 4 - MQTT 3.1.1
+func (o *ClientOptions) SetProtocolVersion(pv uint) *ClientOptions {
+	if (pv >= 3 && pv <= 4) || (pv > 0x80) {
+		o.ProtocolVersion = pv
+		o.protocolVersionExplicit = true
+	}
+	return o
+}
+
+// UnsetWill will cause any set will message to be disregarded.
+func (o *ClientOptions) UnsetWill() *ClientOptions {
+	o.WillEnabled = false
+	return o
+}
+
+// SetWill accepts a string will message to be set. When the client connects,
+// it will give this will message to the broker, which will then publish the
+// provided payload (the will) to any clients that are subscribed to the provided
+// topic.
+func (o *ClientOptions) SetWill(topic string, payload string, qos byte, retained bool) *ClientOptions {
+	o.SetBinaryWill(topic, []byte(payload), qos, retained)
+	return o
+}
+
+// SetBinaryWill accepts a []byte will message to be set. When the client connects,
+// it will give this will message to the broker, which will then publish the
+// provided payload (the will) to any clients that are subscribed to the provided
+// topic.
+func (o *ClientOptions) SetBinaryWill(topic string, payload []byte, qos byte, retained bool) *ClientOptions {
+	o.WillEnabled = true
+	o.WillTopic = topic
+	o.WillPayload = payload
+	o.WillQos = qos
+	o.WillRetained = retained
+	return o
+}
+
+// SetDefaultPublishHandler sets the MessageHandler that will be called when a message
+// is received that does not match any known subscriptions.
+func (o *ClientOptions) SetDefaultPublishHandler(defaultHandler MessageHandler) *ClientOptions {
+	o.DefaultPublishHandler = defaultHandler
+	return o
+}
+
+// SetOnConnectHandler sets the function to be called when the client is connected. Both
+// at initial connection time and upon automatic reconnect.
+func (o *ClientOptions) SetOnConnectHandler(onConn OnConnectHandler) *ClientOptions {
+	o.OnConnect = onConn
+	return o
+}
+
+// SetConnectionLostHandler will set the OnConnectionLost callback to be executed
+// in the case where the client unexpectedly loses connection with the MQTT broker.
+func (o *ClientOptions) SetConnectionLostHandler(onLost ConnectionLostHandler) *ClientOptions {
+	o.OnConnectionLost = onLost
+	return o
+}
+
+// SetWriteTimeout puts a limit on how long a mqtt publish should block until it unblocks with a
+// timeout error. A duration of 0 never times out. Default 30 seconds
+func (o *ClientOptions) SetWriteTimeout(t time.Duration) *ClientOptions {
+	o.WriteTimeout = t
+	return o
+}
+
+// SetConnectTimeout limits how long the client will wait when trying to open a connection
+// to an MQTT server before timeing out and erroring the attempt. A duration of 0 never times out.
+// Default 30 seconds. Currently only operational on TCP/TLS connections.
+func (o *ClientOptions) SetConnectTimeout(t time.Duration) *ClientOptions {
+	o.ConnectTimeout = t
+	return o
+}
+
+// SetMaxReconnectInterval sets the maximum time that will be waited between reconnection attempts
+// when connection is lost
+func (o *ClientOptions) SetMaxReconnectInterval(t time.Duration) *ClientOptions {
+	o.MaxReconnectInterval = t
+	return o
+}
+
+// SetAutoReconnect sets whether the automatic reconnection logic should be used
+// when the connection is lost, even if disabled the ConnectionLostHandler is still
+// called
+func (o *ClientOptions) SetAutoReconnect(a bool) *ClientOptions {
+	o.AutoReconnect = a
+	return o
+}
+
+// SetMessageChannelDepth sets the size of the internal queue that holds messages while the
+// client is temporairily offline, allowing the application to publish when the client is
+// reconnecting. This setting is only valid if AutoReconnect is set to true, it is otherwise
+// ignored.
+func (o *ClientOptions) SetMessageChannelDepth(s uint) *ClientOptions {
+	o.MessageChannelDepth = s
+	return o
+}
+
+// SetHTTPHeaders sets the additional HTTP headers that will be sent in the WebSocket
+// opening handshake.
+func (o *ClientOptions) SetHTTPHeaders(h http.Header) *ClientOptions {
+	o.HTTPHeaders = h
+	return o
+}

vendor/github.com/eclipse/paho.mqtt.golang/options_reader.go

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"crypto/tls"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+// ClientOptionsReader provides an interface for reading ClientOptions after the client has been initialized.
+type ClientOptionsReader struct {
+	options *ClientOptions
+}
+
+//Servers returns a slice of the servers defined in the clientoptions
+func (r *ClientOptionsReader) Servers() []*url.URL {
+	s := make([]*url.URL, len(r.options.Servers))
+
+	for i, u := range r.options.Servers {
+		nu := *u
+		s[i] = &nu
+	}
+
+	return s
+}
+
+//ResumeSubs returns true if resuming stored (un)sub is enabled
+func (r *ClientOptionsReader) ResumeSubs() bool {
+	s := r.options.ResumeSubs
+	return s
+}
+
+//ClientID returns the set client id
+func (r *ClientOptionsReader) ClientID() string {
+	s := r.options.ClientID
+	return s
+}
+
+//Username returns the set username
+func (r *ClientOptionsReader) Username() string {
+	s := r.options.Username
+	return s
+}
+
+//Password returns the set password
+func (r *ClientOptionsReader) Password() string {
+	s := r.options.Password
+	return s
+}
+
+//CleanSession returns whether Cleansession is set
+func (r *ClientOptionsReader) CleanSession() bool {
+	s := r.options.CleanSession
+	return s
+}
+
+func (r *ClientOptionsReader) Order() bool {
+	s := r.options.Order
+	return s
+}
+
+func (r *ClientOptionsReader) WillEnabled() bool {
+	s := r.options.WillEnabled
+	return s
+}
+
+func (r *ClientOptionsReader) WillTopic() string {
+	s := r.options.WillTopic
+	return s
+}
+
+func (r *ClientOptionsReader) WillPayload() []byte {
+	s := r.options.WillPayload
+	return s
+}
+
+func (r *ClientOptionsReader) WillQos() byte {
+	s := r.options.WillQos
+	return s
+}
+
+func (r *ClientOptionsReader) WillRetained() bool {
+	s := r.options.WillRetained
+	return s
+}
+
+func (r *ClientOptionsReader) ProtocolVersion() uint {
+	s := r.options.ProtocolVersion
+	return s
+}
+
+func (r *ClientOptionsReader) TLSConfig() *tls.Config {
+	s := r.options.TLSConfig
+	return s
+}
+
+func (r *ClientOptionsReader) KeepAlive() time.Duration {
+	s := time.Duration(r.options.KeepAlive * int64(time.Second))
+	return s
+}
+
+func (r *ClientOptionsReader) PingTimeout() time.Duration {
+	s := r.options.PingTimeout
+	return s
+}
+
+func (r *ClientOptionsReader) ConnectTimeout() time.Duration {
+	s := r.options.ConnectTimeout
+	return s
+}
+
+func (r *ClientOptionsReader) MaxReconnectInterval() time.Duration {
+	s := r.options.MaxReconnectInterval
+	return s
+}
+
+func (r *ClientOptionsReader) AutoReconnect() bool {
+	s := r.options.AutoReconnect
+	return s
+}
+
+func (r *ClientOptionsReader) WriteTimeout() time.Duration {
+	s := r.options.WriteTimeout
+	return s
+}
+
+func (r *ClientOptionsReader) MessageChannelDepth() uint {
+	s := r.options.MessageChannelDepth
+	return s
+}
+
+func (r *ClientOptionsReader) HTTPHeaders() http.Header {
+	h := r.options.HTTPHeaders
+	return h
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/connack.go

@@ -0,0 +1,55 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//ConnackPacket is an internal representation of the fields of the
+//Connack MQTT packet
+type ConnackPacket struct {
+	FixedHeader
+	SessionPresent bool
+	ReturnCode     byte
+}
+
+func (ca *ConnackPacket) String() string {
+	str := fmt.Sprintf("%s", ca.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("sessionpresent: %t returncode: %d", ca.SessionPresent, ca.ReturnCode)
+	return str
+}
+
+func (ca *ConnackPacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+
+	body.WriteByte(boolToByte(ca.SessionPresent))
+	body.WriteByte(ca.ReturnCode)
+	ca.FixedHeader.RemainingLength = 2
+	packet := ca.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (ca *ConnackPacket) Unpack(b io.Reader) error {
+	flags, err := decodeByte(b)
+	if err != nil {
+		return err
+	}
+	ca.SessionPresent = 1&flags > 0
+	ca.ReturnCode, err = decodeByte(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (ca *ConnackPacket) Details() Details {
+	return Details{Qos: 0, MessageID: 0}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/connect.go

@@ -0,0 +1,154 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//ConnectPacket is an internal representation of the fields of the
+//Connect MQTT packet
+type ConnectPacket struct {
+	FixedHeader
+	ProtocolName    string
+	ProtocolVersion byte
+	CleanSession    bool
+	WillFlag        bool
+	WillQos         byte
+	WillRetain      bool
+	UsernameFlag    bool
+	PasswordFlag    bool
+	ReservedBit     byte
+	Keepalive       uint16
+
+	ClientIdentifier string
+	WillTopic        string
+	WillMessage      []byte
+	Username         string
+	Password         []byte
+}
+
+func (c *ConnectPacket) String() string {
+	str := fmt.Sprintf("%s", c.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("protocolversion: %d protocolname: %s cleansession: %t willflag: %t WillQos: %d WillRetain: %t Usernameflag: %t Passwordflag: %t keepalive: %d clientId: %s willtopic: %s willmessage: %s Username: %s Password: %s", c.ProtocolVersion, c.ProtocolName, c.CleanSession, c.WillFlag, c.WillQos, c.WillRetain, c.UsernameFlag, c.PasswordFlag, c.Keepalive, c.ClientIdentifier, c.WillTopic, c.WillMessage, c.Username, c.Password)
+	return str
+}
+
+func (c *ConnectPacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+
+	body.Write(encodeString(c.ProtocolName))
+	body.WriteByte(c.ProtocolVersion)
+	body.WriteByte(boolToByte(c.CleanSession)<<1 | boolToByte(c.WillFlag)<<2 | c.WillQos<<3 | boolToByte(c.WillRetain)<<5 | boolToByte(c.PasswordFlag)<<6 | boolToByte(c.UsernameFlag)<<7)
+	body.Write(encodeUint16(c.Keepalive))
+	body.Write(encodeString(c.ClientIdentifier))
+	if c.WillFlag {
+		body.Write(encodeString(c.WillTopic))
+		body.Write(encodeBytes(c.WillMessage))
+	}
+	if c.UsernameFlag {
+		body.Write(encodeString(c.Username))
+	}
+	if c.PasswordFlag {
+		body.Write(encodeBytes(c.Password))
+	}
+	c.FixedHeader.RemainingLength = body.Len()
+	packet := c.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (c *ConnectPacket) Unpack(b io.Reader) error {
+	var err error
+	c.ProtocolName, err = decodeString(b)
+	if err != nil {
+		return err
+	}
+	c.ProtocolVersion, err = decodeByte(b)
+	if err != nil {
+		return err
+	}
+	options, err := decodeByte(b)
+	if err != nil {
+		return err
+	}
+	c.ReservedBit = 1 & options
+	c.CleanSession = 1&(options>>1) > 0
+	c.WillFlag = 1&(options>>2) > 0
+	c.WillQos = 3 & (options >> 3)
+	c.WillRetain = 1&(options>>5) > 0
+	c.PasswordFlag = 1&(options>>6) > 0
+	c.UsernameFlag = 1&(options>>7) > 0
+	c.Keepalive, err = decodeUint16(b)
+	if err != nil {
+		return err
+	}
+	c.ClientIdentifier, err = decodeString(b)
+	if err != nil {
+		return err
+	}
+	if c.WillFlag {
+		c.WillTopic, err = decodeString(b)
+		if err != nil {
+			return err
+		}
+		c.WillMessage, err = decodeBytes(b)
+		if err != nil {
+			return err
+		}
+	}
+	if c.UsernameFlag {
+		c.Username, err = decodeString(b)
+		if err != nil {
+			return err
+		}
+	}
+	if c.PasswordFlag {
+		c.Password, err = decodeBytes(b)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+//Validate performs validation of the fields of a Connect packet
+func (c *ConnectPacket) Validate() byte {
+	if c.PasswordFlag && !c.UsernameFlag {
+		return ErrRefusedBadUsernameOrPassword
+	}
+	if c.ReservedBit != 0 {
+		//Bad reserved bit
+		return ErrProtocolViolation
+	}
+	if (c.ProtocolName == "MQIsdp" && c.ProtocolVersion != 3) || (c.ProtocolName == "MQTT" && c.ProtocolVersion != 4) {
+		//Mismatched or unsupported protocol version
+		return ErrRefusedBadProtocolVersion
+	}
+	if c.ProtocolName != "MQIsdp" && c.ProtocolName != "MQTT" {
+		//Bad protocol name
+		return ErrProtocolViolation
+	}
+	if len(c.ClientIdentifier) > 65535 || len(c.Username) > 65535 || len(c.Password) > 65535 {
+		//Bad size field
+		return ErrProtocolViolation
+	}
+	if len(c.ClientIdentifier) == 0 && !c.CleanSession {
+		//Bad client identifier
+		return ErrRefusedIDRejected
+	}
+	return Accepted
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (c *ConnectPacket) Details() Details {
+	return Details{Qos: 0, MessageID: 0}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/disconnect.go

@@ -0,0 +1,36 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//DisconnectPacket is an internal representation of the fields of the
+//Disconnect MQTT packet
+type DisconnectPacket struct {
+	FixedHeader
+}
+
+func (d *DisconnectPacket) String() string {
+	str := fmt.Sprintf("%s", d.FixedHeader)
+	return str
+}
+
+func (d *DisconnectPacket) Write(w io.Writer) error {
+	packet := d.FixedHeader.pack()
+	_, err := packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (d *DisconnectPacket) Unpack(b io.Reader) error {
+	return nil
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (d *DisconnectPacket) Details() Details {
+	return Details{Qos: 0, MessageID: 0}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/packets.go

@@ -0,0 +1,346 @@
+package packets
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+)
+
+//ControlPacket defines the interface for structs intended to hold
+//decoded MQTT packets, either from being read or before being
+//written
+type ControlPacket interface {
+	Write(io.Writer) error
+	Unpack(io.Reader) error
+	String() string
+	Details() Details
+}
+
+//PacketNames maps the constants for each of the MQTT packet types
+//to a string representation of their name.
+var PacketNames = map[uint8]string{
+	1:  "CONNECT",
+	2:  "CONNACK",
+	3:  "PUBLISH",
+	4:  "PUBACK",
+	5:  "PUBREC",
+	6:  "PUBREL",
+	7:  "PUBCOMP",
+	8:  "SUBSCRIBE",
+	9:  "SUBACK",
+	10: "UNSUBSCRIBE",
+	11: "UNSUBACK",
+	12: "PINGREQ",
+	13: "PINGRESP",
+	14: "DISCONNECT",
+}
+
+//Below are the constants assigned to each of the MQTT packet types
+const (
+	Connect     = 1
+	Connack     = 2
+	Publish     = 3
+	Puback      = 4
+	Pubrec      = 5
+	Pubrel      = 6
+	Pubcomp     = 7
+	Subscribe   = 8
+	Suback      = 9
+	Unsubscribe = 10
+	Unsuback    = 11
+	Pingreq     = 12
+	Pingresp    = 13
+	Disconnect  = 14
+)
+
+//Below are the const definitions for error codes returned by
+//Connect()
+const (
+	Accepted                        = 0x00
+	ErrRefusedBadProtocolVersion    = 0x01
+	ErrRefusedIDRejected            = 0x02
+	ErrRefusedServerUnavailable     = 0x03
+	ErrRefusedBadUsernameOrPassword = 0x04
+	ErrRefusedNotAuthorised         = 0x05
+	ErrNetworkError                 = 0xFE
+	ErrProtocolViolation            = 0xFF
+)
+
+//ConnackReturnCodes is a map of the error codes constants for Connect()
+//to a string representation of the error
+var ConnackReturnCodes = map[uint8]string{
+	0:   "Connection Accepted",
+	1:   "Connection Refused: Bad Protocol Version",
+	2:   "Connection Refused: Client Identifier Rejected",
+	3:   "Connection Refused: Server Unavailable",
+	4:   "Connection Refused: Username or Password in unknown format",
+	5:   "Connection Refused: Not Authorised",
+	254: "Connection Error",
+	255: "Connection Refused: Protocol Violation",
+}
+
+//ConnErrors is a map of the errors codes constants for Connect()
+//to a Go error
+var ConnErrors = map[byte]error{
+	Accepted:                        nil,
+	ErrRefusedBadProtocolVersion:    errors.New("Unnacceptable protocol version"),
+	ErrRefusedIDRejected:            errors.New("Identifier rejected"),
+	ErrRefusedServerUnavailable:     errors.New("Server Unavailable"),
+	ErrRefusedBadUsernameOrPassword: errors.New("Bad user name or password"),
+	ErrRefusedNotAuthorised:         errors.New("Not Authorized"),
+	ErrNetworkError:                 errors.New("Network Error"),
+	ErrProtocolViolation:            errors.New("Protocol Violation"),
+}
+
+//ReadPacket takes an instance of an io.Reader (such as net.Conn) and attempts
+//to read an MQTT packet from the stream. It returns a ControlPacket
+//representing the decoded MQTT packet and an error. One of these returns will
+//always be nil, a nil ControlPacket indicating an error occurred.
+func ReadPacket(r io.Reader) (ControlPacket, error) {
+	var fh FixedHeader
+	b := make([]byte, 1)
+
+	_, err := io.ReadFull(r, b)
+	if err != nil {
+		return nil, err
+	}
+
+	err = fh.unpack(b[0], r)
+	if err != nil {
+		return nil, err
+	}
+
+	cp, err := NewControlPacketWithHeader(fh)
+	if err != nil {
+		return nil, err
+	}
+
+	packetBytes := make([]byte, fh.RemainingLength)
+	n, err := io.ReadFull(r, packetBytes)
+	if err != nil {
+		return nil, err
+	}
+	if n != fh.RemainingLength {
+		return nil, errors.New("Failed to read expected data")
+	}
+
+	err = cp.Unpack(bytes.NewBuffer(packetBytes))
+	return cp, err
+}
+
+//NewControlPacket is used to create a new ControlPacket of the type specified
+//by packetType, this is usually done by reference to the packet type constants
+//defined in packets.go. The newly created ControlPacket is empty and a pointer
+//is returned.
+func NewControlPacket(packetType byte) ControlPacket {
+	switch packetType {
+	case Connect:
+		return &ConnectPacket{FixedHeader: FixedHeader{MessageType: Connect}}
+	case Connack:
+		return &ConnackPacket{FixedHeader: FixedHeader{MessageType: Connack}}
+	case Disconnect:
+		return &DisconnectPacket{FixedHeader: FixedHeader{MessageType: Disconnect}}
+	case Publish:
+		return &PublishPacket{FixedHeader: FixedHeader{MessageType: Publish}}
+	case Puback:
+		return &PubackPacket{FixedHeader: FixedHeader{MessageType: Puback}}
+	case Pubrec:
+		return &PubrecPacket{FixedHeader: FixedHeader{MessageType: Pubrec}}
+	case Pubrel:
+		return &PubrelPacket{FixedHeader: FixedHeader{MessageType: Pubrel, Qos: 1}}
+	case Pubcomp:
+		return &PubcompPacket{FixedHeader: FixedHeader{MessageType: Pubcomp}}
+	case Subscribe:
+		return &SubscribePacket{FixedHeader: FixedHeader{MessageType: Subscribe, Qos: 1}}
+	case Suback:
+		return &SubackPacket{FixedHeader: FixedHeader{MessageType: Suback}}
+	case Unsubscribe:
+		return &UnsubscribePacket{FixedHeader: FixedHeader{MessageType: Unsubscribe, Qos: 1}}
+	case Unsuback:
+		return &UnsubackPacket{FixedHeader: FixedHeader{MessageType: Unsuback}}
+	case Pingreq:
+		return &PingreqPacket{FixedHeader: FixedHeader{MessageType: Pingreq}}
+	case Pingresp:
+		return &PingrespPacket{FixedHeader: FixedHeader{MessageType: Pingresp}}
+	}
+	return nil
+}
+
+//NewControlPacketWithHeader is used to create a new ControlPacket of the type
+//specified within the FixedHeader that is passed to the function.
+//The newly created ControlPacket is empty and a pointer is returned.
+func NewControlPacketWithHeader(fh FixedHeader) (ControlPacket, error) {
+	switch fh.MessageType {
+	case Connect:
+		return &ConnectPacket{FixedHeader: fh}, nil
+	case Connack:
+		return &ConnackPacket{FixedHeader: fh}, nil
+	case Disconnect:
+		return &DisconnectPacket{FixedHeader: fh}, nil
+	case Publish:
+		return &PublishPacket{FixedHeader: fh}, nil
+	case Puback:
+		return &PubackPacket{FixedHeader: fh}, nil
+	case Pubrec:
+		return &PubrecPacket{FixedHeader: fh}, nil
+	case Pubrel:
+		return &PubrelPacket{FixedHeader: fh}, nil
+	case Pubcomp:
+		return &PubcompPacket{FixedHeader: fh}, nil
+	case Subscribe:
+		return &SubscribePacket{FixedHeader: fh}, nil
+	case Suback:
+		return &SubackPacket{FixedHeader: fh}, nil
+	case Unsubscribe:
+		return &UnsubscribePacket{FixedHeader: fh}, nil
+	case Unsuback:
+		return &UnsubackPacket{FixedHeader: fh}, nil
+	case Pingreq:
+		return &PingreqPacket{FixedHeader: fh}, nil
+	case Pingresp:
+		return &PingrespPacket{FixedHeader: fh}, nil
+	}
+	return nil, fmt.Errorf("unsupported packet type 0x%x", fh.MessageType)
+}
+
+//Details struct returned by the Details() function called on
+//ControlPackets to present details of the Qos and MessageID
+//of the ControlPacket
+type Details struct {
+	Qos       byte
+	MessageID uint16
+}
+
+//FixedHeader is a struct to hold the decoded information from
+//the fixed header of an MQTT ControlPacket
+type FixedHeader struct {
+	MessageType     byte
+	Dup             bool
+	Qos             byte
+	Retain          bool
+	RemainingLength int
+}
+
+func (fh FixedHeader) String() string {
+	return fmt.Sprintf("%s: dup: %t qos: %d retain: %t rLength: %d", PacketNames[fh.MessageType], fh.Dup, fh.Qos, fh.Retain, fh.RemainingLength)
+}
+
+func boolToByte(b bool) byte {
+	switch b {
+	case true:
+		return 1
+	default:
+		return 0
+	}
+}
+
+func (fh *FixedHeader) pack() bytes.Buffer {
+	var header bytes.Buffer
+	header.WriteByte(fh.MessageType<<4 | boolToByte(fh.Dup)<<3 | fh.Qos<<1 | boolToByte(fh.Retain))
+	header.Write(encodeLength(fh.RemainingLength))
+	return header
+}
+
+func (fh *FixedHeader) unpack(typeAndFlags byte, r io.Reader) error {
+	fh.MessageType = typeAndFlags >> 4
+	fh.Dup = (typeAndFlags>>3)&0x01 > 0
+	fh.Qos = (typeAndFlags >> 1) & 0x03
+	fh.Retain = typeAndFlags&0x01 > 0
+
+	var err error
+	fh.RemainingLength, err = decodeLength(r)
+	return err
+}
+
+func decodeByte(b io.Reader) (byte, error) {
+	num := make([]byte, 1)
+	_, err := b.Read(num)
+	if err != nil {
+		return 0, err
+	}
+
+	return num[0], nil
+}
+
+func decodeUint16(b io.Reader) (uint16, error) {
+	num := make([]byte, 2)
+	_, err := b.Read(num)
+	if err != nil {
+		return 0, err
+	}
+	return binary.BigEndian.Uint16(num), nil
+}
+
+func encodeUint16(num uint16) []byte {
+	bytes := make([]byte, 2)
+	binary.BigEndian.PutUint16(bytes, num)
+	return bytes
+}
+
+func encodeString(field string) []byte {
+	return encodeBytes([]byte(field))
+}
+
+func decodeString(b io.Reader) (string, error) {
+	buf, err := decodeBytes(b)
+	return string(buf), err
+}
+
+func decodeBytes(b io.Reader) ([]byte, error) {
+	fieldLength, err := decodeUint16(b)
+	if err != nil {
+		return nil, err
+	}
+
+	field := make([]byte, fieldLength)
+	_, err = b.Read(field)
+	if err != nil {
+		return nil, err
+	}
+
+	return field, nil
+}
+
+func encodeBytes(field []byte) []byte {
+	fieldLength := make([]byte, 2)
+	binary.BigEndian.PutUint16(fieldLength, uint16(len(field)))
+	return append(fieldLength, field...)
+}
+
+func encodeLength(length int) []byte {
+	var encLength []byte
+	for {
+		digit := byte(length % 128)
+		length /= 128
+		if length > 0 {
+			digit |= 0x80
+		}
+		encLength = append(encLength, digit)
+		if length == 0 {
+			break
+		}
+	}
+	return encLength
+}
+
+func decodeLength(r io.Reader) (int, error) {
+	var rLength uint32
+	var multiplier uint32
+	b := make([]byte, 1)
+	for multiplier < 27 { //fix: Infinite '(digit & 128) == 1' will cause the dead loop
+		_, err := io.ReadFull(r, b)
+		if err != nil {
+			return 0, err
+		}
+
+		digit := b[0]
+		rLength |= uint32(digit&127) << multiplier
+		if (digit & 128) == 0 {
+			break
+		}
+		multiplier += 7
+	}
+	return int(rLength), nil
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/pingreq.go

@@ -0,0 +1,36 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PingreqPacket is an internal representation of the fields of the
+//Pingreq MQTT packet
+type PingreqPacket struct {
+	FixedHeader
+}
+
+func (pr *PingreqPacket) String() string {
+	str := fmt.Sprintf("%s", pr.FixedHeader)
+	return str
+}
+
+func (pr *PingreqPacket) Write(w io.Writer) error {
+	packet := pr.FixedHeader.pack()
+	_, err := packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pr *PingreqPacket) Unpack(b io.Reader) error {
+	return nil
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pr *PingreqPacket) Details() Details {
+	return Details{Qos: 0, MessageID: 0}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/pingresp.go

@@ -0,0 +1,36 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PingrespPacket is an internal representation of the fields of the
+//Pingresp MQTT packet
+type PingrespPacket struct {
+	FixedHeader
+}
+
+func (pr *PingrespPacket) String() string {
+	str := fmt.Sprintf("%s", pr.FixedHeader)
+	return str
+}
+
+func (pr *PingrespPacket) Write(w io.Writer) error {
+	packet := pr.FixedHeader.pack()
+	_, err := packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pr *PingrespPacket) Unpack(b io.Reader) error {
+	return nil
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pr *PingrespPacket) Details() Details {
+	return Details{Qos: 0, MessageID: 0}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/puback.go

@@ -0,0 +1,45 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PubackPacket is an internal representation of the fields of the
+//Puback MQTT packet
+type PubackPacket struct {
+	FixedHeader
+	MessageID uint16
+}
+
+func (pa *PubackPacket) String() string {
+	str := fmt.Sprintf("%s", pa.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", pa.MessageID)
+	return str
+}
+
+func (pa *PubackPacket) Write(w io.Writer) error {
+	var err error
+	pa.FixedHeader.RemainingLength = 2
+	packet := pa.FixedHeader.pack()
+	packet.Write(encodeUint16(pa.MessageID))
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pa *PubackPacket) Unpack(b io.Reader) error {
+	var err error
+	pa.MessageID, err = decodeUint16(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pa *PubackPacket) Details() Details {
+	return Details{Qos: pa.Qos, MessageID: pa.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/pubcomp.go

@@ -0,0 +1,45 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PubcompPacket is an internal representation of the fields of the
+//Pubcomp MQTT packet
+type PubcompPacket struct {
+	FixedHeader
+	MessageID uint16
+}
+
+func (pc *PubcompPacket) String() string {
+	str := fmt.Sprintf("%s", pc.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", pc.MessageID)
+	return str
+}
+
+func (pc *PubcompPacket) Write(w io.Writer) error {
+	var err error
+	pc.FixedHeader.RemainingLength = 2
+	packet := pc.FixedHeader.pack()
+	packet.Write(encodeUint16(pc.MessageID))
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pc *PubcompPacket) Unpack(b io.Reader) error {
+	var err error
+	pc.MessageID, err = decodeUint16(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pc *PubcompPacket) Details() Details {
+	return Details{Qos: pc.Qos, MessageID: pc.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/publish.go

@@ -0,0 +1,88 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//PublishPacket is an internal representation of the fields of the
+//Publish MQTT packet
+type PublishPacket struct {
+	FixedHeader
+	TopicName string
+	MessageID uint16
+	Payload   []byte
+}
+
+func (p *PublishPacket) String() string {
+	str := fmt.Sprintf("%s", p.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("topicName: %s MessageID: %d", p.TopicName, p.MessageID)
+	str += " "
+	str += fmt.Sprintf("payload: %s", string(p.Payload))
+	return str
+}
+
+func (p *PublishPacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+
+	body.Write(encodeString(p.TopicName))
+	if p.Qos > 0 {
+		body.Write(encodeUint16(p.MessageID))
+	}
+	p.FixedHeader.RemainingLength = body.Len() + len(p.Payload)
+	packet := p.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	packet.Write(p.Payload)
+	_, err = w.Write(packet.Bytes())
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (p *PublishPacket) Unpack(b io.Reader) error {
+	var payloadLength = p.FixedHeader.RemainingLength
+	var err error
+	p.TopicName, err = decodeString(b)
+	if err != nil {
+		return err
+	}
+
+	if p.Qos > 0 {
+		p.MessageID, err = decodeUint16(b)
+		if err != nil {
+			return err
+		}
+		payloadLength -= len(p.TopicName) + 4
+	} else {
+		payloadLength -= len(p.TopicName) + 2
+	}
+	if payloadLength < 0 {
+		return fmt.Errorf("Error unpacking publish, payload length < 0")
+	}
+	p.Payload = make([]byte, payloadLength)
+	_, err = b.Read(p.Payload)
+
+	return err
+}
+
+//Copy creates a new PublishPacket with the same topic and payload
+//but an empty fixed header, useful for when you want to deliver
+//a message with different properties such as Qos but the same
+//content
+func (p *PublishPacket) Copy() *PublishPacket {
+	newP := NewControlPacket(Publish).(*PublishPacket)
+	newP.TopicName = p.TopicName
+	newP.Payload = p.Payload
+
+	return newP
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (p *PublishPacket) Details() Details {
+	return Details{Qos: p.Qos, MessageID: p.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/pubrec.go

@@ -0,0 +1,45 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PubrecPacket is an internal representation of the fields of the
+//Pubrec MQTT packet
+type PubrecPacket struct {
+	FixedHeader
+	MessageID uint16
+}
+
+func (pr *PubrecPacket) String() string {
+	str := fmt.Sprintf("%s", pr.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", pr.MessageID)
+	return str
+}
+
+func (pr *PubrecPacket) Write(w io.Writer) error {
+	var err error
+	pr.FixedHeader.RemainingLength = 2
+	packet := pr.FixedHeader.pack()
+	packet.Write(encodeUint16(pr.MessageID))
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pr *PubrecPacket) Unpack(b io.Reader) error {
+	var err error
+	pr.MessageID, err = decodeUint16(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pr *PubrecPacket) Details() Details {
+	return Details{Qos: pr.Qos, MessageID: pr.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/pubrel.go

@@ -0,0 +1,45 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//PubrelPacket is an internal representation of the fields of the
+//Pubrel MQTT packet
+type PubrelPacket struct {
+	FixedHeader
+	MessageID uint16
+}
+
+func (pr *PubrelPacket) String() string {
+	str := fmt.Sprintf("%s", pr.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", pr.MessageID)
+	return str
+}
+
+func (pr *PubrelPacket) Write(w io.Writer) error {
+	var err error
+	pr.FixedHeader.RemainingLength = 2
+	packet := pr.FixedHeader.pack()
+	packet.Write(encodeUint16(pr.MessageID))
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (pr *PubrelPacket) Unpack(b io.Reader) error {
+	var err error
+	pr.MessageID, err = decodeUint16(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (pr *PubrelPacket) Details() Details {
+	return Details{Qos: pr.Qos, MessageID: pr.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/suback.go

@@ -0,0 +1,60 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//SubackPacket is an internal representation of the fields of the
+//Suback MQTT packet
+type SubackPacket struct {
+	FixedHeader
+	MessageID   uint16
+	ReturnCodes []byte
+}
+
+func (sa *SubackPacket) String() string {
+	str := fmt.Sprintf("%s", sa.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", sa.MessageID)
+	return str
+}
+
+func (sa *SubackPacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+	body.Write(encodeUint16(sa.MessageID))
+	body.Write(sa.ReturnCodes)
+	sa.FixedHeader.RemainingLength = body.Len()
+	packet := sa.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (sa *SubackPacket) Unpack(b io.Reader) error {
+	var qosBuffer bytes.Buffer
+	var err error
+	sa.MessageID, err = decodeUint16(b)
+	if err != nil {
+		return err
+	}
+
+	_, err = qosBuffer.ReadFrom(b)
+	if err != nil {
+		return err
+	}
+	sa.ReturnCodes = qosBuffer.Bytes()
+
+	return nil
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (sa *SubackPacket) Details() Details {
+	return Details{Qos: 0, MessageID: sa.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/subscribe.go

@@ -0,0 +1,72 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//SubscribePacket is an internal representation of the fields of the
+//Subscribe MQTT packet
+type SubscribePacket struct {
+	FixedHeader
+	MessageID uint16
+	Topics    []string
+	Qoss      []byte
+}
+
+func (s *SubscribePacket) String() string {
+	str := fmt.Sprintf("%s", s.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d topics: %s", s.MessageID, s.Topics)
+	return str
+}
+
+func (s *SubscribePacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+
+	body.Write(encodeUint16(s.MessageID))
+	for i, topic := range s.Topics {
+		body.Write(encodeString(topic))
+		body.WriteByte(s.Qoss[i])
+	}
+	s.FixedHeader.RemainingLength = body.Len()
+	packet := s.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (s *SubscribePacket) Unpack(b io.Reader) error {
+	var err error
+	s.MessageID, err = decodeUint16(b)
+	if err != nil {
+		return err
+	}
+	payloadLength := s.FixedHeader.RemainingLength - 2
+	for payloadLength > 0 {
+		topic, err := decodeString(b)
+		if err != nil {
+			return err
+		}
+		s.Topics = append(s.Topics, topic)
+		qos, err := decodeByte(b)
+		if err != nil {
+			return err
+		}
+		s.Qoss = append(s.Qoss, qos)
+		payloadLength -= 2 + len(topic) + 1 //2 bytes of string length, plus string, plus 1 byte for Qos
+	}
+
+	return nil
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (s *SubscribePacket) Details() Details {
+	return Details{Qos: 1, MessageID: s.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/unsuback.go

@@ -0,0 +1,45 @@
+package packets
+
+import (
+	"fmt"
+	"io"
+)
+
+//UnsubackPacket is an internal representation of the fields of the
+//Unsuback MQTT packet
+type UnsubackPacket struct {
+	FixedHeader
+	MessageID uint16
+}
+
+func (ua *UnsubackPacket) String() string {
+	str := fmt.Sprintf("%s", ua.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", ua.MessageID)
+	return str
+}
+
+func (ua *UnsubackPacket) Write(w io.Writer) error {
+	var err error
+	ua.FixedHeader.RemainingLength = 2
+	packet := ua.FixedHeader.pack()
+	packet.Write(encodeUint16(ua.MessageID))
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (ua *UnsubackPacket) Unpack(b io.Reader) error {
+	var err error
+	ua.MessageID, err = decodeUint16(b)
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (ua *UnsubackPacket) Details() Details {
+	return Details{Qos: 0, MessageID: ua.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/packets/unsubscribe.go

@@ -0,0 +1,59 @@
+package packets
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+//UnsubscribePacket is an internal representation of the fields of the
+//Unsubscribe MQTT packet
+type UnsubscribePacket struct {
+	FixedHeader
+	MessageID uint16
+	Topics    []string
+}
+
+func (u *UnsubscribePacket) String() string {
+	str := fmt.Sprintf("%s", u.FixedHeader)
+	str += " "
+	str += fmt.Sprintf("MessageID: %d", u.MessageID)
+	return str
+}
+
+func (u *UnsubscribePacket) Write(w io.Writer) error {
+	var body bytes.Buffer
+	var err error
+	body.Write(encodeUint16(u.MessageID))
+	for _, topic := range u.Topics {
+		body.Write(encodeString(topic))
+	}
+	u.FixedHeader.RemainingLength = body.Len()
+	packet := u.FixedHeader.pack()
+	packet.Write(body.Bytes())
+	_, err = packet.WriteTo(w)
+
+	return err
+}
+
+//Unpack decodes the details of a ControlPacket after the fixed
+//header has been read
+func (u *UnsubscribePacket) Unpack(b io.Reader) error {
+	var err error
+	u.MessageID, err = decodeUint16(b)
+	if err != nil {
+		return err
+	}
+
+	for topic, err := decodeString(b); err == nil && topic != ""; topic, err = decodeString(b) {
+		u.Topics = append(u.Topics, topic)
+	}
+
+	return err
+}
+
+//Details returns a Details struct containing the Qos and
+//MessageID of this ControlPacket
+func (u *UnsubscribePacket) Details() Details {
+	return Details{Qos: 1, MessageID: u.MessageID}
+}

vendor/github.com/eclipse/paho.mqtt.golang/ping.go

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"errors"
+	"sync/atomic"
+	"time"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+func keepalive(c *client) {
+	defer c.workers.Done()
+	DEBUG.Println(PNG, "keepalive starting")
+	var checkInterval int64
+	var pingSent time.Time
+
+	if c.options.KeepAlive > 10 {
+		checkInterval = 5
+	} else {
+		checkInterval = c.options.KeepAlive / 2
+	}
+
+	intervalTicker := time.NewTicker(time.Duration(checkInterval * int64(time.Second)))
+	defer intervalTicker.Stop()
+
+	for {
+		select {
+		case <-c.stop:
+			DEBUG.Println(PNG, "keepalive stopped")
+			return
+		case <-intervalTicker.C:
+			lastSent := c.lastSent.Load().(time.Time)
+			lastReceived := c.lastReceived.Load().(time.Time)
+
+			DEBUG.Println(PNG, "ping check", time.Since(lastSent).Seconds())
+			if time.Since(lastSent) >= time.Duration(c.options.KeepAlive*int64(time.Second)) || time.Since(lastReceived) >= time.Duration(c.options.KeepAlive*int64(time.Second)) {
+				if atomic.LoadInt32(&c.pingOutstanding) == 0 {
+					DEBUG.Println(PNG, "keepalive sending ping")
+					ping := packets.NewControlPacket(packets.Pingreq).(*packets.PingreqPacket)
+					//We don't want to wait behind large messages being sent, the Write call
+					//will block until it it able to send the packet.
+					atomic.StoreInt32(&c.pingOutstanding, 1)
+					ping.Write(c.conn)
+					c.lastSent.Store(time.Now())
+					pingSent = time.Now()
+				}
+			}
+			if atomic.LoadInt32(&c.pingOutstanding) > 0 && time.Now().Sub(pingSent) >= c.options.PingTimeout {
+				CRITICAL.Println(PNG, "pingresp not received, disconnecting")
+				c.errors <- errors.New("pingresp not received, disconnecting")
+				return
+			}
+		}
+	}
+}

vendor/github.com/eclipse/paho.mqtt.golang/router.go

@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"container/list"
+	"strings"
+	"sync"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+// route is a type which associates MQTT Topic strings with a
+// callback to be executed upon the arrival of a message associated
+// with a subscription to that topic.
+type route struct {
+	topic    string
+	callback MessageHandler
+}
+
+// match takes a slice of strings which represent the route being tested having been split on '/'
+// separators, and a slice of strings representing the topic string in the published message, similarly
+// split.
+// The function determines if the topic string matches the route according to the MQTT topic rules
+// and returns a boolean of the outcome
+func match(route []string, topic []string) bool {
+	if len(route) == 0 {
+		if len(topic) == 0 {
+			return true
+		}
+		return false
+	}
+
+	if len(topic) == 0 {
+		if route[0] == "#" {
+			return true
+		}
+		return false
+	}
+
+	if route[0] == "#" {
+		return true
+	}
+
+	if (route[0] == "+") || (route[0] == topic[0]) {
+		return match(route[1:], topic[1:])
+	}
+	return false
+}
+
+func routeIncludesTopic(route, topic string) bool {
+	return match(routeSplit(route), strings.Split(topic, "/"))
+}
+
+// removes $share and sharename when splitting the route to allow
+// shared subscription routes to correctly match the topic
+func routeSplit(route string) []string {
+	var result []string
+	if strings.HasPrefix(route, "$share") {
+		result = strings.Split(route, "/")[2:]
+	} else {
+		result = strings.Split(route, "/")
+	}
+	return result
+}
+
+// match takes the topic string of the published message and does a basic compare to the
+// string of the current Route, if they match it returns true
+func (r *route) match(topic string) bool {
+	return r.topic == topic || routeIncludesTopic(r.topic, topic)
+}
+
+type router struct {
+	sync.RWMutex
+	routes         *list.List
+	defaultHandler MessageHandler
+	messages       chan *packets.PublishPacket
+	stop           chan bool
+}
+
+// newRouter returns a new instance of a Router and channel which can be used to tell the Router
+// to stop
+func newRouter() (*router, chan bool) {
+	router := &router{routes: list.New(), messages: make(chan *packets.PublishPacket), stop: make(chan bool)}
+	stop := router.stop
+	return router, stop
+}
+
+// addRoute takes a topic string and MessageHandler callback. It looks in the current list of
+// routes to see if there is already a matching Route. If there is it replaces the current
+// callback with the new one. If not it add a new entry to the list of Routes.
+func (r *router) addRoute(topic string, callback MessageHandler) {
+	r.Lock()
+	defer r.Unlock()
+	for e := r.routes.Front(); e != nil; e = e.Next() {
+		if e.Value.(*route).match(topic) {
+			r := e.Value.(*route)
+			r.callback = callback
+			return
+		}
+	}
+	r.routes.PushBack(&route{topic: topic, callback: callback})
+}
+
+// deleteRoute takes a route string, looks for a matching Route in the list of Routes. If
+// found it removes the Route from the list.
+func (r *router) deleteRoute(topic string) {
+	r.Lock()
+	defer r.Unlock()
+	for e := r.routes.Front(); e != nil; e = e.Next() {
+		if e.Value.(*route).match(topic) {
+			r.routes.Remove(e)
+			return
+		}
+	}
+}
+
+// setDefaultHandler assigns a default callback that will be called if no matching Route
+// is found for an incoming Publish.
+func (r *router) setDefaultHandler(handler MessageHandler) {
+	r.Lock()
+	defer r.Unlock()
+	r.defaultHandler = handler
+}
+
+// matchAndDispatch takes a channel of Message pointers as input and starts a go routine that
+// takes messages off the channel, matches them against the internal route list and calls the
+// associated callback (or the defaultHandler, if one exists and no other route matched). If
+// anything is sent down the stop channel the function will end.
+func (r *router) matchAndDispatch(messages <-chan *packets.PublishPacket, order bool, client *client) {
+	go func() {
+		for {
+			select {
+			case message := <-messages:
+				sent := false
+				r.RLock()
+				m := messageFromPublish(message, client.ackFunc(message))
+				handlers := []MessageHandler{}
+				for e := r.routes.Front(); e != nil; e = e.Next() {
+					if e.Value.(*route).match(message.TopicName) {
+						if order {
+							handlers = append(handlers, e.Value.(*route).callback)
+						} else {
+							hd := e.Value.(*route).callback
+							go func() {
+								hd(client, m)
+								m.Ack()
+							}()
+						}
+						sent = true
+					}
+				}
+				if !sent && r.defaultHandler != nil {
+					if order {
+						handlers = append(handlers, r.defaultHandler)
+					} else {
+						go func() {
+							r.defaultHandler(client, m)
+							m.Ack()
+						}()
+					}
+				}
+				r.RUnlock()
+				for _, handler := range handlers {
+					func() {
+						handler(client, m)
+						m.Ack()
+					}()
+				}
+			case <-r.stop:
+				return
+			}
+		}
+	}()
+}

vendor/github.com/eclipse/paho.mqtt.golang/store.go

@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+const (
+	inboundPrefix  = "i."
+	outboundPrefix = "o."
+)
+
+// Store is an interface which can be used to provide implementations
+// for message persistence.
+// Because we may have to store distinct messages with the same
+// message ID, we need a unique key for each message. This is
+// possible by prepending "i." or "o." to each message id
+type Store interface {
+	Open()
+	Put(key string, message packets.ControlPacket)
+	Get(key string) packets.ControlPacket
+	All() []string
+	Del(key string)
+	Close()
+	Reset()
+}
+
+// A key MUST have the form "X.[messageid]"
+// where X is 'i' or 'o'
+func mIDFromKey(key string) uint16 {
+	s := key[2:]
+	i, err := strconv.Atoi(s)
+	chkerr(err)
+	return uint16(i)
+}
+
+// Return true if key prefix is outbound
+func isKeyOutbound(key string) bool {
+	return key[:2] == outboundPrefix
+}
+
+// Return true if key prefix is inbound
+func isKeyInbound(key string) bool {
+	return key[:2] == inboundPrefix
+}
+
+// Return a string of the form "i.[id]"
+func inboundKeyFromMID(id uint16) string {
+	return fmt.Sprintf("%s%d", inboundPrefix, id)
+}
+
+// Return a string of the form "o.[id]"
+func outboundKeyFromMID(id uint16) string {
+	return fmt.Sprintf("%s%d", outboundPrefix, id)
+}
+
+// govern which outgoing messages are persisted
+func persistOutbound(s Store, m packets.ControlPacket) {
+	switch m.Details().Qos {
+	case 0:
+		switch m.(type) {
+		case *packets.PubackPacket, *packets.PubcompPacket:
+			// Sending puback. delete matching publish
+			// from ibound
+			s.Del(inboundKeyFromMID(m.Details().MessageID))
+		}
+	case 1:
+		switch m.(type) {
+		case *packets.PublishPacket, *packets.PubrelPacket, *packets.SubscribePacket, *packets.UnsubscribePacket:
+			// Sending publish. store in obound
+			// until puback received
+			s.Put(outboundKeyFromMID(m.Details().MessageID), m)
+		default:
+			ERROR.Println(STR, "Asked to persist an invalid message type")
+		}
+	case 2:
+		switch m.(type) {
+		case *packets.PublishPacket:
+			// Sending publish. store in obound
+			// until pubrel received
+			s.Put(outboundKeyFromMID(m.Details().MessageID), m)
+		default:
+			ERROR.Println(STR, "Asked to persist an invalid message type")
+		}
+	}
+}
+
+// govern which incoming messages are persisted
+func persistInbound(s Store, m packets.ControlPacket) {
+	switch m.Details().Qos {
+	case 0:
+		switch m.(type) {
+		case *packets.PubackPacket, *packets.SubackPacket, *packets.UnsubackPacket, *packets.PubcompPacket:
+			// Received a puback. delete matching publish
+			// from obound
+			s.Del(outboundKeyFromMID(m.Details().MessageID))
+		case *packets.PublishPacket, *packets.PubrecPacket, *packets.PingrespPacket, *packets.ConnackPacket:
+		default:
+			ERROR.Println(STR, "Asked to persist an invalid messages type")
+		}
+	case 1:
+		switch m.(type) {
+		case *packets.PublishPacket, *packets.PubrelPacket:
+			// Received a publish. store it in ibound
+			// until puback sent
+			s.Put(inboundKeyFromMID(m.Details().MessageID), m)
+		default:
+			ERROR.Println(STR, "Asked to persist an invalid messages type")
+		}
+	case 2:
+		switch m.(type) {
+		case *packets.PublishPacket:
+			// Received a publish. store it in ibound
+			// until pubrel received
+			s.Put(inboundKeyFromMID(m.Details().MessageID), m)
+		default:
+			ERROR.Println(STR, "Asked to persist an invalid messages type")
+		}
+	}
+}

vendor/github.com/eclipse/paho.mqtt.golang/token.go

@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2014 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Allan Stockdill-Mander
+ */
+
+package mqtt
+
+import (
+	"sync"
+	"time"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
+)
+
+// PacketAndToken is a struct that contains both a ControlPacket and a
+// Token. This struct is passed via channels between the client interface
+// code and the underlying code responsible for sending and receiving
+// MQTT messages.
+type PacketAndToken struct {
+	p packets.ControlPacket
+	t tokenCompletor
+}
+
+// Token defines the interface for the tokens used to indicate when
+// actions have completed.
+type Token interface {
+	Wait() bool
+	WaitTimeout(time.Duration) bool
+	Error() error
+}
+
+type TokenErrorSetter interface {
+	setError(error)
+}
+
+type tokenCompletor interface {
+	Token
+	TokenErrorSetter
+	flowComplete()
+}
+
+type baseToken struct {
+	m        sync.RWMutex
+	complete chan struct{}
+	err      error
+}
+
+// Wait will wait indefinitely for the Token to complete, ie the Publish
+// to be sent and confirmed receipt from the broker
+func (b *baseToken) Wait() bool {
+	<-b.complete
+	return true
+}
+
+// WaitTimeout takes a time.Duration to wait for the flow associated with the
+// Token to complete, returns true if it returned before the timeout or
+// returns false if the timeout occurred. In the case of a timeout the Token
+// does not have an error set in case the caller wishes to wait again
+func (b *baseToken) WaitTimeout(d time.Duration) bool {
+	b.m.Lock()
+	defer b.m.Unlock()
+
+	timer := time.NewTimer(d)
+	select {
+	case <-b.complete:
+		if !timer.Stop() {
+			<-timer.C
+		}
+		return true
+	case <-timer.C:
+	}
+
+	return false
+}
+
+func (b *baseToken) flowComplete() {
+	select {
+	case <-b.complete:
+	default:
+		close(b.complete)
+	}
+}
+
+func (b *baseToken) Error() error {
+	b.m.RLock()
+	defer b.m.RUnlock()
+	return b.err
+}
+
+func (b *baseToken) setError(e error) {
+	b.m.Lock()
+	b.err = e
+	b.flowComplete()
+	b.m.Unlock()
+}
+
+func newToken(tType byte) tokenCompletor {
+	switch tType {
+	case packets.Connect:
+		return &ConnectToken{baseToken: baseToken{complete: make(chan struct{})}}
+	case packets.Subscribe:
+		return &SubscribeToken{baseToken: baseToken{complete: make(chan struct{})}, subResult: make(map[string]byte)}
+	case packets.Publish:
+		return &PublishToken{baseToken: baseToken{complete: make(chan struct{})}}
+	case packets.Unsubscribe:
+		return &UnsubscribeToken{baseToken: baseToken{complete: make(chan struct{})}}
+	case packets.Disconnect:
+		return &DisconnectToken{baseToken: baseToken{complete: make(chan struct{})}}
+	}
+	return nil
+}
+
+// ConnectToken is an extension of Token containing the extra fields
+// required to provide information about calls to Connect()
+type ConnectToken struct {
+	baseToken
+	returnCode     byte
+	sessionPresent bool
+}
+
+// ReturnCode returns the acknowlegement code in the connack sent
+// in response to a Connect()
+func (c *ConnectToken) ReturnCode() byte {
+	c.m.RLock()
+	defer c.m.RUnlock()
+	return c.returnCode
+}
+
+// SessionPresent returns a bool representing the value of the
+// session present field in the connack sent in response to a Connect()
+func (c *ConnectToken) SessionPresent() bool {
+	c.m.RLock()
+	defer c.m.RUnlock()
+	return c.sessionPresent
+}
+
+// PublishToken is an extension of Token containing the extra fields
+// required to provide information about calls to Publish()
+type PublishToken struct {
+	baseToken
+	messageID uint16
+}
+
+// MessageID returns the MQTT message ID that was assigned to the
+// Publish packet when it was sent to the broker
+func (p *PublishToken) MessageID() uint16 {
+	return p.messageID
+}
+
+// SubscribeToken is an extension of Token containing the extra fields
+// required to provide information about calls to Subscribe()
+type SubscribeToken struct {
+	baseToken
+	subs      []string
+	subResult map[string]byte
+}
+
+// Result returns a map of topics that were subscribed to along with
+// the matching return code from the broker. This is either the Qos
+// value of the subscription or an error code.
+func (s *SubscribeToken) Result() map[string]byte {
+	s.m.RLock()
+	defer s.m.RUnlock()
+	return s.subResult
+}
+
+// UnsubscribeToken is an extension of Token containing the extra fields
+// required to provide information about calls to Unsubscribe()
+type UnsubscribeToken struct {
+	baseToken
+}
+
+// DisconnectToken is an extension of Token containing the extra fields
+// required to provide information about calls to Disconnect()
+type DisconnectToken struct {
+	baseToken
+}

vendor/github.com/eclipse/paho.mqtt.golang/topic.go

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2014 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+import (
+	"errors"
+	"strings"
+)
+
+//ErrInvalidQos is the error returned when an packet is to be sent
+//with an invalid Qos value
+var ErrInvalidQos = errors.New("Invalid QoS")
+
+//ErrInvalidTopicEmptyString is the error returned when a topic string
+//is passed in that is 0 length
+var ErrInvalidTopicEmptyString = errors.New("Invalid Topic; empty string")
+
+//ErrInvalidTopicMultilevel is the error returned when a topic string
+//is passed in that has the multi level wildcard in any position but
+//the last
+var ErrInvalidTopicMultilevel = errors.New("Invalid Topic; multi-level wildcard must be last level")
+
+// Topic Names and Topic Filters
+// The MQTT v3.1.1 spec clarifies a number of ambiguities with regard
+// to the validity of Topic strings.
+// - A Topic must be between 1 and 65535 bytes.
+// - A Topic is case sensitive.
+// - A Topic may contain whitespace.
+// - A Topic containing a leading forward slash is different than a Topic without.
+// - A Topic may be "/" (two levels, both empty string).
+// - A Topic must be UTF-8 encoded.
+// - A Topic may contain any number of levels.
+// - A Topic may contain an empty level (two forward slashes in a row).
+// - A TopicName may not contain a wildcard.
+// - A TopicFilter may only have a # (multi-level) wildcard as the last level.
+// - A TopicFilter may contain any number of + (single-level) wildcards.
+// - A TopicFilter with a # will match the absense of a level
+//     Example:  a subscription to "foo/#" will match messages published to "foo".
+
+func validateSubscribeMap(subs map[string]byte) ([]string, []byte, error) {
+	var topics []string
+	var qoss []byte
+	for topic, qos := range subs {
+		if err := validateTopicAndQos(topic, qos); err != nil {
+			return nil, nil, err
+		}
+		topics = append(topics, topic)
+		qoss = append(qoss, qos)
+	}
+
+	return topics, qoss, nil
+}
+
+func validateTopicAndQos(topic string, qos byte) error {
+	if len(topic) == 0 {
+		return ErrInvalidTopicEmptyString
+	}
+
+	levels := strings.Split(topic, "/")
+	for i, level := range levels {
+		if level == "#" && i != len(levels)-1 {
+			return ErrInvalidTopicMultilevel
+		}
+	}
+
+	if qos < 0 || qos > 2 {
+		return ErrInvalidQos
+	}
+	return nil
+}

vendor/github.com/eclipse/paho.mqtt.golang/trace.go

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2013 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Seth Hoenig
+ *    Allan Stockdill-Mander
+ *    Mike Robertson
+ */
+
+package mqtt
+
+type (
+	// Logger interface allows implementations to provide to this package any
+	// object that implements the methods defined in it.
+	Logger interface {
+		Println(v ...interface{})
+		Printf(format string, v ...interface{})
+	}
+
+	// NOOPLogger implements the logger that does not perform any operation
+	// by default. This allows us to efficiently discard the unwanted messages.
+	NOOPLogger struct{}
+)
+
+func (NOOPLogger) Println(v ...interface{}) {}
+func (NOOPLogger) Printf(format string, v ...interface{}) {}
+
+// Internal levels of library output that are initialised to not print
+// anything but can be overridden by programmer
+var (
+	ERROR    Logger = NOOPLogger{}
+	CRITICAL Logger = NOOPLogger{}
+	WARN     Logger = NOOPLogger{}
+	DEBUG    Logger = NOOPLogger{}
+)

vendor/github.com/golang/protobuf/AUTHORS

@@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at http://tip.golang.org/AUTHORS.

vendor/github.com/golang/protobuf/CONTRIBUTORS

@@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at http://tip.golang.org/CONTRIBUTORS.

vendor/github.com/golang/protobuf/LICENSE

@@ -0,0 +1,28 @@
+Copyright 2010 The Go Authors.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

vendor/github.com/golang/protobuf/proto/buffer.go

@@ -0,0 +1,324 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"errors"
+	"fmt"
+
+	"google.golang.org/protobuf/encoding/prototext"
+	"google.golang.org/protobuf/encoding/protowire"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	WireVarint     = 0
+	WireFixed32    = 5
+	WireFixed64    = 1
+	WireBytes      = 2
+	WireStartGroup = 3
+	WireEndGroup   = 4
+)
+
+// EncodeVarint returns the varint encoded bytes of v.
+func EncodeVarint(v uint64) []byte {
+	return protowire.AppendVarint(nil, v)
+}
+
+// SizeVarint returns the length of the varint encoded bytes of v.
+// This is equal to len(EncodeVarint(v)).
+func SizeVarint(v uint64) int {
+	return protowire.SizeVarint(v)
+}
+
+// DecodeVarint parses a varint encoded integer from b,
+// returning the integer value and the length of the varint.
+// It returns (0, 0) if there is a parse error.
+func DecodeVarint(b []byte) (uint64, int) {
+	v, n := protowire.ConsumeVarint(b)
+	if n < 0 {
+		return 0, 0
+	}
+	return v, n
+}
+
+// Buffer is a buffer for encoding and decoding the protobuf wire format.
+// It may be reused between invocations to reduce memory usage.
+type Buffer struct {
+	buf           []byte
+	idx           int
+	deterministic bool
+}
+
+// NewBuffer allocates a new Buffer initialized with buf,
+// where the contents of buf are considered the unread portion of the buffer.
+func NewBuffer(buf []byte) *Buffer {
+	return &Buffer{buf: buf}
+}
+
+// SetDeterministic specifies whether to use deterministic serialization.
+//
+// Deterministic serialization guarantees that for a given binary, equal
+// messages will always be serialized to the same bytes. This implies:
+//
+//   - Repeated serialization of a message will return the same bytes.
+//   - Different processes of the same binary (which may be executing on
+//     different machines) will serialize equal messages to the same bytes.
+//
+// Note that the deterministic serialization is NOT canonical across
+// languages. It is not guaranteed to remain stable over time. It is unstable
+// across different builds with schema changes due to unknown fields.
+// Users who need canonical serialization (e.g., persistent storage in a
+// canonical form, fingerprinting, etc.) should define their own
+// canonicalization specification and implement their own serializer rather
+// than relying on this API.
+//
+// If deterministic serialization is requested, map entries will be sorted
+// by keys in lexographical order. This is an implementation detail and
+// subject to change.
+func (b *Buffer) SetDeterministic(deterministic bool) {
+	b.deterministic = deterministic
+}
+
+// SetBuf sets buf as the internal buffer,
+// where the contents of buf are considered the unread portion of the buffer.
+func (b *Buffer) SetBuf(buf []byte) {
+	b.buf = buf
+	b.idx = 0
+}
+
+// Reset clears the internal buffer of all written and unread data.
+func (b *Buffer) Reset() {
+	b.buf = b.buf[:0]
+	b.idx = 0
+}
+
+// Bytes returns the internal buffer.
+func (b *Buffer) Bytes() []byte {
+	return b.buf
+}
+
+// Unread returns the unread portion of the buffer.
+func (b *Buffer) Unread() []byte {
+	return b.buf[b.idx:]
+}
+
+// Marshal appends the wire-format encoding of m to the buffer.
+func (b *Buffer) Marshal(m Message) error {
+	var err error
+	b.buf, err = marshalAppend(b.buf, m, b.deterministic)
+	return err
+}
+
+// Unmarshal parses the wire-format message in the buffer and
+// places the decoded results in m.
+// It does not reset m before unmarshaling.
+func (b *Buffer) Unmarshal(m Message) error {
+	err := UnmarshalMerge(b.Unread(), m)
+	b.idx = len(b.buf)
+	return err
+}
+
+type unknownFields struct{ XXX_unrecognized protoimpl.UnknownFields }
+
+func (m *unknownFields) String() string { panic("not implemented") }
+func (m *unknownFields) Reset()         { panic("not implemented") }
+func (m *unknownFields) ProtoMessage()  { panic("not implemented") }
+
+// DebugPrint dumps the encoded bytes of b with a header and footer including s
+// to stdout. This is only intended for debugging.
+func (*Buffer) DebugPrint(s string, b []byte) {
+	m := MessageReflect(new(unknownFields))
+	m.SetUnknown(b)
+	b, _ = prototext.MarshalOptions{AllowPartial: true, Indent: "\t"}.Marshal(m.Interface())
+	fmt.Printf("==== %s ====\n%s==== %s ====\n", s, b, s)
+}
+
+// EncodeVarint appends an unsigned varint encoding to the buffer.
+func (b *Buffer) EncodeVarint(v uint64) error {
+	b.buf = protowire.AppendVarint(b.buf, v)
+	return nil
+}
+
+// EncodeZigzag32 appends a 32-bit zig-zag varint encoding to the buffer.
+func (b *Buffer) EncodeZigzag32(v uint64) error {
+	return b.EncodeVarint(uint64((uint32(v) << 1) ^ uint32((int32(v) >> 31))))
+}
+
+// EncodeZigzag64 appends a 64-bit zig-zag varint encoding to the buffer.
+func (b *Buffer) EncodeZigzag64(v uint64) error {
+	return b.EncodeVarint(uint64((uint64(v) << 1) ^ uint64((int64(v) >> 63))))
+}
+
+// EncodeFixed32 appends a 32-bit little-endian integer to the buffer.
+func (b *Buffer) EncodeFixed32(v uint64) error {
+	b.buf = protowire.AppendFixed32(b.buf, uint32(v))
+	return nil
+}
+
+// EncodeFixed64 appends a 64-bit little-endian integer to the buffer.
+func (b *Buffer) EncodeFixed64(v uint64) error {
+	b.buf = protowire.AppendFixed64(b.buf, uint64(v))
+	return nil
+}
+
+// EncodeRawBytes appends a length-prefixed raw bytes to the buffer.
+func (b *Buffer) EncodeRawBytes(v []byte) error {
+	b.buf = protowire.AppendBytes(b.buf, v)
+	return nil
+}
+
+// EncodeStringBytes appends a length-prefixed raw bytes to the buffer.
+// It does not validate whether v contains valid UTF-8.
+func (b *Buffer) EncodeStringBytes(v string) error {
+	b.buf = protowire.AppendString(b.buf, v)
+	return nil
+}
+
+// EncodeMessage appends a length-prefixed encoded message to the buffer.
+func (b *Buffer) EncodeMessage(m Message) error {
+	var err error
+	b.buf = protowire.AppendVarint(b.buf, uint64(Size(m)))
+	b.buf, err = marshalAppend(b.buf, m, b.deterministic)
+	return err
+}
+
+// DecodeVarint consumes an encoded unsigned varint from the buffer.
+func (b *Buffer) DecodeVarint() (uint64, error) {
+	v, n := protowire.ConsumeVarint(b.buf[b.idx:])
+	if n < 0 {
+		return 0, protowire.ParseError(n)
+	}
+	b.idx += n
+	return uint64(v), nil
+}
+
+// DecodeZigzag32 consumes an encoded 32-bit zig-zag varint from the buffer.
+func (b *Buffer) DecodeZigzag32() (uint64, error) {
+	v, err := b.DecodeVarint()
+	if err != nil {
+		return 0, err
+	}
+	return uint64((uint32(v) >> 1) ^ uint32((int32(v&1)<<31)>>31)), nil
+}
+
+// DecodeZigzag64 consumes an encoded 64-bit zig-zag varint from the buffer.
+func (b *Buffer) DecodeZigzag64() (uint64, error) {
+	v, err := b.DecodeVarint()
+	if err != nil {
+		return 0, err
+	}
+	return uint64((uint64(v) >> 1) ^ uint64((int64(v&1)<<63)>>63)), nil
+}
+
+// DecodeFixed32 consumes a 32-bit little-endian integer from the buffer.
+func (b *Buffer) DecodeFixed32() (uint64, error) {
+	v, n := protowire.ConsumeFixed32(b.buf[b.idx:])
+	if n < 0 {
+		return 0, protowire.ParseError(n)
+	}
+	b.idx += n
+	return uint64(v), nil
+}
+
+// DecodeFixed64 consumes a 64-bit little-endian integer from the buffer.
+func (b *Buffer) DecodeFixed64() (uint64, error) {
+	v, n := protowire.ConsumeFixed64(b.buf[b.idx:])
+	if n < 0 {
+		return 0, protowire.ParseError(n)
+	}
+	b.idx += n
+	return uint64(v), nil
+}
+
+// DecodeRawBytes consumes a length-prefixed raw bytes from the buffer.
+// If alloc is specified, it returns a copy the raw bytes
+// rather than a sub-slice of the buffer.
+func (b *Buffer) DecodeRawBytes(alloc bool) ([]byte, error) {
+	v, n := protowire.ConsumeBytes(b.buf[b.idx:])
+	if n < 0 {
+		return nil, protowire.ParseError(n)
+	}
+	b.idx += n
+	if alloc {
+		v = append([]byte(nil), v...)
+	}
+	return v, nil
+}
+
+// DecodeStringBytes consumes a length-prefixed raw bytes from the buffer.
+// It does not validate whether the raw bytes contain valid UTF-8.
+func (b *Buffer) DecodeStringBytes() (string, error) {
+	v, n := protowire.ConsumeString(b.buf[b.idx:])
+	if n < 0 {
+		return "", protowire.ParseError(n)
+	}
+	b.idx += n
+	return v, nil
+}
+
+// DecodeMessage consumes a length-prefixed message from the buffer.
+// It does not reset m before unmarshaling.
+func (b *Buffer) DecodeMessage(m Message) error {
+	v, err := b.DecodeRawBytes(false)
+	if err != nil {
+		return err
+	}
+	return UnmarshalMerge(v, m)
+}
+
+// DecodeGroup consumes a message group from the buffer.
+// It assumes that the start group marker has already been consumed and
+// consumes all bytes until (and including the end group marker).
+// It does not reset m before unmarshaling.
+func (b *Buffer) DecodeGroup(m Message) error {
+	v, n, err := consumeGroup(b.buf[b.idx:])
+	if err != nil {
+		return err
+	}
+	b.idx += n
+	return UnmarshalMerge(v, m)
+}
+
+// consumeGroup parses b until it finds an end group marker, returning
+// the raw bytes of the message (excluding the end group marker) and the
+// the total length of the message (including the end group marker).
+func consumeGroup(b []byte) ([]byte, int, error) {
+	b0 := b
+	depth := 1 // assume this follows a start group marker
+	for {
+		_, wtyp, tagLen := protowire.ConsumeTag(b)
+		if tagLen < 0 {
+			return nil, 0, protowire.ParseError(tagLen)
+		}
+		b = b[tagLen:]
+
+		var valLen int
+		switch wtyp {
+		case protowire.VarintType:
+			_, valLen = protowire.ConsumeVarint(b)
+		case protowire.Fixed32Type:
+			_, valLen = protowire.ConsumeFixed32(b)
+		case protowire.Fixed64Type:
+			_, valLen = protowire.ConsumeFixed64(b)
+		case protowire.BytesType:
+			_, valLen = protowire.ConsumeBytes(b)
+		case protowire.StartGroupType:
+			depth++
+		case protowire.EndGroupType:
+			depth--
+		default:
+			return nil, 0, errors.New("proto: cannot parse reserved wire type")
+		}
+		if valLen < 0 {
+			return nil, 0, protowire.ParseError(valLen)
+		}
+		b = b[valLen:]
+
+		if depth == 0 {
+			return b0[:len(b0)-len(b)-tagLen], len(b0) - len(b), nil
+		}
+	}
+}

vendor/github.com/golang/protobuf/proto/defaults.go

@@ -0,0 +1,63 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// SetDefaults sets unpopulated scalar fields to their default values.
+// Fields within a oneof are not set even if they have a default value.
+// SetDefaults is recursively called upon any populated message fields.
+func SetDefaults(m Message) {
+	if m != nil {
+		setDefaults(MessageReflect(m))
+	}
+}
+
+func setDefaults(m protoreflect.Message) {
+	fds := m.Descriptor().Fields()
+	for i := 0; i < fds.Len(); i++ {
+		fd := fds.Get(i)
+		if !m.Has(fd) {
+			if fd.HasDefault() && fd.ContainingOneof() == nil {
+				v := fd.Default()
+				if fd.Kind() == protoreflect.BytesKind {
+					v = protoreflect.ValueOf(append([]byte(nil), v.Bytes()...)) // copy the default bytes
+				}
+				m.Set(fd, v)
+			}
+			continue
+		}
+	}
+
+	m.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
+		switch {
+		// Handle singular message.
+		case fd.Cardinality() != protoreflect.Repeated:
+			if fd.Message() != nil {
+				setDefaults(m.Get(fd).Message())
+			}
+		// Handle list of messages.
+		case fd.IsList():
+			if fd.Message() != nil {
+				ls := m.Get(fd).List()
+				for i := 0; i < ls.Len(); i++ {
+					setDefaults(ls.Get(i).Message())
+				}
+			}
+		// Handle map of messages.
+		case fd.IsMap():
+			if fd.MapValue().Message() != nil {
+				ms := m.Get(fd).Map()
+				ms.Range(func(_ protoreflect.MapKey, v protoreflect.Value) bool {
+					setDefaults(v.Message())
+					return true
+				})
+			}
+		}
+		return true
+	})
+}

vendor/github.com/golang/protobuf/proto/deprecated.go

@@ -0,0 +1,113 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+
+	protoV2 "google.golang.org/protobuf/proto"
+)
+
+var (
+	// Deprecated: No longer returned.
+	ErrNil = errors.New("proto: Marshal called with nil")
+
+	// Deprecated: No longer returned.
+	ErrTooLarge = errors.New("proto: message encodes to over 2 GB")
+
+	// Deprecated: No longer returned.
+	ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
+)
+
+// Deprecated: Do not use.
+type Stats struct{ Emalloc, Dmalloc, Encode, Decode, Chit, Cmiss, Size uint64 }
+
+// Deprecated: Do not use.
+func GetStats() Stats { return Stats{} }
+
+// Deprecated: Do not use.
+func MarshalMessageSet(interface{}) ([]byte, error) {
+	return nil, errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func UnmarshalMessageSet([]byte, interface{}) error {
+	return errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func MarshalMessageSetJSON(interface{}) ([]byte, error) {
+	return nil, errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func UnmarshalMessageSetJSON([]byte, interface{}) error {
+	return errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func RegisterMessageSetType(Message, int32, string) {}
+
+// Deprecated: Do not use.
+func EnumName(m map[int32]string, v int32) string {
+	s, ok := m[v]
+	if ok {
+		return s
+	}
+	return strconv.Itoa(int(v))
+}
+
+// Deprecated: Do not use.
+func UnmarshalJSONEnum(m map[string]int32, data []byte, enumName string) (int32, error) {
+	if data[0] == '"' {
+		// New style: enums are strings.
+		var repr string
+		if err := json.Unmarshal(data, &repr); err != nil {
+			return -1, err
+		}
+		val, ok := m[repr]
+		if !ok {
+			return 0, fmt.Errorf("unrecognized enum %s value %q", enumName, repr)
+		}
+		return val, nil
+	}
+	// Old style: enums are ints.
+	var val int32
+	if err := json.Unmarshal(data, &val); err != nil {
+		return 0, fmt.Errorf("cannot unmarshal %#q into enum %s", data, enumName)
+	}
+	return val, nil
+}
+
+// Deprecated: Do not use; this type existed for intenal-use only.
+type InternalMessageInfo struct{}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) DiscardUnknown(m Message) {
+	DiscardUnknown(m)
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Marshal(b []byte, m Message, deterministic bool) ([]byte, error) {
+	return protoV2.MarshalOptions{Deterministic: deterministic}.MarshalAppend(b, MessageV2(m))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Merge(dst, src Message) {
+	protoV2.Merge(MessageV2(dst), MessageV2(src))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Size(m Message) int {
+	return protoV2.Size(MessageV2(m))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Unmarshal(m Message, b []byte) error {
+	return protoV2.UnmarshalOptions{Merge: true}.Unmarshal(b, MessageV2(m))
+}

vendor/github.com/golang/protobuf/proto/discard.go

@@ -0,0 +1,58 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// DiscardUnknown recursively discards all unknown fields from this message
+// and all embedded messages.
+//
+// When unmarshaling a message with unrecognized fields, the tags and values
+// of such fields are preserved in the Message. This allows a later call to
+// marshal to be able to produce a message that continues to have those
+// unrecognized fields. To avoid this, DiscardUnknown is used to
+// explicitly clear the unknown fields after unmarshaling.
+func DiscardUnknown(m Message) {
+	if m != nil {
+		discardUnknown(MessageReflect(m))
+	}
+}
+
+func discardUnknown(m protoreflect.Message) {
+	m.Range(func(fd protoreflect.FieldDescriptor, val protoreflect.Value) bool {
+		switch {
+		// Handle singular message.
+		case fd.Cardinality() != protoreflect.Repeated:
+			if fd.Message() != nil {
+				discardUnknown(m.Get(fd).Message())
+			}
+		// Handle list of messages.
+		case fd.IsList():
+			if fd.Message() != nil {
+				ls := m.Get(fd).List()
+				for i := 0; i < ls.Len(); i++ {
+					discardUnknown(ls.Get(i).Message())
+				}
+			}
+		// Handle map of messages.
+		case fd.IsMap():
+			if fd.MapValue().Message() != nil {
+				ms := m.Get(fd).Map()
+				ms.Range(func(_ protoreflect.MapKey, v protoreflect.Value) bool {
+					discardUnknown(v.Message())
+					return true
+				})
+			}
+		}
+		return true
+	})
+
+	// Discard unknown fields.
+	if len(m.GetUnknown()) > 0 {
+		m.SetUnknown(nil)
+	}
+}

vendor/github.com/golang/protobuf/proto/extensions.go

@@ -0,0 +1,356 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"google.golang.org/protobuf/encoding/protowire"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/runtime/protoiface"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+type (
+	// ExtensionDesc represents an extension descriptor and
+	// is used to interact with an extension field in a message.
+	//
+	// Variables of this type are generated in code by protoc-gen-go.
+	ExtensionDesc = protoimpl.ExtensionInfo
+
+	// ExtensionRange represents a range of message extensions.
+	// Used in code generated by protoc-gen-go.
+	ExtensionRange = protoiface.ExtensionRangeV1
+
+	// Deprecated: Do not use; this is an internal type.
+	Extension = protoimpl.ExtensionFieldV1
+
+	// Deprecated: Do not use; this is an internal type.
+	XXX_InternalExtensions = protoimpl.ExtensionFields
+)
+
+// ErrMissingExtension reports whether the extension was not present.
+var ErrMissingExtension = errors.New("proto: missing extension")
+
+var errNotExtendable = errors.New("proto: not an extendable proto.Message")
+
+// HasExtension reports whether the extension field is present in m
+// either as an explicitly populated field or as an unknown field.
+func HasExtension(m Message, xt *ExtensionDesc) (has bool) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return false
+	}
+
+	// Check whether any populated known field matches the field number.
+	xtd := xt.TypeDescriptor()
+	if isValidExtension(mr.Descriptor(), xtd) {
+		has = mr.Has(xtd)
+	} else {
+		mr.Range(func(fd protoreflect.FieldDescriptor, _ protoreflect.Value) bool {
+			has = int32(fd.Number()) == xt.Field
+			return !has
+		})
+	}
+
+	// Check whether any unknown field matches the field number.
+	for b := mr.GetUnknown(); !has && len(b) > 0; {
+		num, _, n := protowire.ConsumeField(b)
+		has = int32(num) == xt.Field
+		b = b[n:]
+	}
+	return has
+}
+
+// ClearExtension removes the extension field from m
+// either as an explicitly populated field or as an unknown field.
+func ClearExtension(m Message, xt *ExtensionDesc) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return
+	}
+
+	xtd := xt.TypeDescriptor()
+	if isValidExtension(mr.Descriptor(), xtd) {
+		mr.Clear(xtd)
+	} else {
+		mr.Range(func(fd protoreflect.FieldDescriptor, _ protoreflect.Value) bool {
+			if int32(fd.Number()) == xt.Field {
+				mr.Clear(fd)
+				return false
+			}
+			return true
+		})
+	}
+	clearUnknown(mr, fieldNum(xt.Field))
+}
+
+// ClearAllExtensions clears all extensions from m.
+// This includes populated fields and unknown fields in the extension range.
+func ClearAllExtensions(m Message) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return
+	}
+
+	mr.Range(func(fd protoreflect.FieldDescriptor, _ protoreflect.Value) bool {
+		if fd.IsExtension() {
+			mr.Clear(fd)
+		}
+		return true
+	})
+	clearUnknown(mr, mr.Descriptor().ExtensionRanges())
+}
+
+// GetExtension retrieves a proto2 extended field from m.
+//
+// If the descriptor is type complete (i.e., ExtensionDesc.ExtensionType is non-nil),
+// then GetExtension parses the encoded field and returns a Go value of the specified type.
+// If the field is not present, then the default value is returned (if one is specified),
+// otherwise ErrMissingExtension is reported.
+//
+// If the descriptor is type incomplete (i.e., ExtensionDesc.ExtensionType is nil),
+// then GetExtension returns the raw encoded bytes for the extension field.
+func GetExtension(m Message, xt *ExtensionDesc) (interface{}, error) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() || mr.Descriptor().ExtensionRanges().Len() == 0 {
+		return nil, errNotExtendable
+	}
+
+	// Retrieve the unknown fields for this extension field.
+	var bo protoreflect.RawFields
+	for bi := mr.GetUnknown(); len(bi) > 0; {
+		num, _, n := protowire.ConsumeField(bi)
+		if int32(num) == xt.Field {
+			bo = append(bo, bi[:n]...)
+		}
+		bi = bi[n:]
+	}
+
+	// For type incomplete descriptors, only retrieve the unknown fields.
+	if xt.ExtensionType == nil {
+		return []byte(bo), nil
+	}
+
+	// If the extension field only exists as unknown fields, unmarshal it.
+	// This is rarely done since proto.Unmarshal eagerly unmarshals extensions.
+	xtd := xt.TypeDescriptor()
+	if !isValidExtension(mr.Descriptor(), xtd) {
+		return nil, fmt.Errorf("proto: bad extended type; %T does not extend %T", xt.ExtendedType, m)
+	}
+	if !mr.Has(xtd) && len(bo) > 0 {
+		m2 := mr.New()
+		if err := (proto.UnmarshalOptions{
+			Resolver: extensionResolver{xt},
+		}.Unmarshal(bo, m2.Interface())); err != nil {
+			return nil, err
+		}
+		if m2.Has(xtd) {
+			mr.Set(xtd, m2.Get(xtd))
+			clearUnknown(mr, fieldNum(xt.Field))
+		}
+	}
+
+	// Check whether the message has the extension field set or a default.
+	var pv protoreflect.Value
+	switch {
+	case mr.Has(xtd):
+		pv = mr.Get(xtd)
+	case xtd.HasDefault():
+		pv = xtd.Default()
+	default:
+		return nil, ErrMissingExtension
+	}
+
+	v := xt.InterfaceOf(pv)
+	rv := reflect.ValueOf(v)
+	if isScalarKind(rv.Kind()) {
+		rv2 := reflect.New(rv.Type())
+		rv2.Elem().Set(rv)
+		v = rv2.Interface()
+	}
+	return v, nil
+}
+
+// extensionResolver is a custom extension resolver that stores a single
+// extension type that takes precedence over the global registry.
+type extensionResolver struct{ xt protoreflect.ExtensionType }
+
+func (r extensionResolver) FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error) {
+	if xtd := r.xt.TypeDescriptor(); xtd.FullName() == field {
+		return r.xt, nil
+	}
+	return protoregistry.GlobalTypes.FindExtensionByName(field)
+}
+
+func (r extensionResolver) FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error) {
+	if xtd := r.xt.TypeDescriptor(); xtd.ContainingMessage().FullName() == message && xtd.Number() == field {
+		return r.xt, nil
+	}
+	return protoregistry.GlobalTypes.FindExtensionByNumber(message, field)
+}
+
+// GetExtensions returns a list of the extensions values present in m,
+// corresponding with the provided list of extension descriptors, xts.
+// If an extension is missing in m, the corresponding value is nil.
+func GetExtensions(m Message, xts []*ExtensionDesc) ([]interface{}, error) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return nil, errNotExtendable
+	}
+
+	vs := make([]interface{}, len(xts))
+	for i, xt := range xts {
+		v, err := GetExtension(m, xt)
+		if err != nil {
+			if err == ErrMissingExtension {
+				continue
+			}
+			return vs, err
+		}
+		vs[i] = v
+	}
+	return vs, nil
+}
+
+// SetExtension sets an extension field in m to the provided value.
+func SetExtension(m Message, xt *ExtensionDesc, v interface{}) error {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() || mr.Descriptor().ExtensionRanges().Len() == 0 {
+		return errNotExtendable
+	}
+
+	rv := reflect.ValueOf(v)
+	if reflect.TypeOf(v) != reflect.TypeOf(xt.ExtensionType) {
+		return fmt.Errorf("proto: bad extension value type. got: %T, want: %T", v, xt.ExtensionType)
+	}
+	if rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			return fmt.Errorf("proto: SetExtension called with nil value of type %T", v)
+		}
+		if isScalarKind(rv.Elem().Kind()) {
+			v = rv.Elem().Interface()
+		}
+	}
+
+	xtd := xt.TypeDescriptor()
+	if !isValidExtension(mr.Descriptor(), xtd) {
+		return fmt.Errorf("proto: bad extended type; %T does not extend %T", xt.ExtendedType, m)
+	}
+	mr.Set(xtd, xt.ValueOf(v))
+	clearUnknown(mr, fieldNum(xt.Field))
+	return nil
+}
+
+// SetRawExtension inserts b into the unknown fields of m.
+//
+// Deprecated: Use Message.ProtoReflect.SetUnknown instead.
+func SetRawExtension(m Message, fnum int32, b []byte) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return
+	}
+
+	// Verify that the raw field is valid.
+	for b0 := b; len(b0) > 0; {
+		num, _, n := protowire.ConsumeField(b0)
+		if int32(num) != fnum {
+			panic(fmt.Sprintf("mismatching field number: got %d, want %d", num, fnum))
+		}
+		b0 = b0[n:]
+	}
+
+	ClearExtension(m, &ExtensionDesc{Field: fnum})
+	mr.SetUnknown(append(mr.GetUnknown(), b...))
+}
+
+// ExtensionDescs returns a list of extension descriptors found in m,
+// containing descriptors for both populated extension fields in m and
+// also unknown fields of m that are in the extension range.
+// For the later case, an type incomplete descriptor is provided where only
+// the ExtensionDesc.Field field is populated.
+// The order of the extension descriptors is undefined.
+func ExtensionDescs(m Message) ([]*ExtensionDesc, error) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() || mr.Descriptor().ExtensionRanges().Len() == 0 {
+		return nil, errNotExtendable
+	}
+
+	// Collect a set of known extension descriptors.
+	extDescs := make(map[protoreflect.FieldNumber]*ExtensionDesc)
+	mr.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
+		if fd.IsExtension() {
+			xt := fd.(protoreflect.ExtensionTypeDescriptor)
+			if xd, ok := xt.Type().(*ExtensionDesc); ok {
+				extDescs[fd.Number()] = xd
+			}
+		}
+		return true
+	})
+
+	// Collect a set of unknown extension descriptors.
+	extRanges := mr.Descriptor().ExtensionRanges()
+	for b := mr.GetUnknown(); len(b) > 0; {
+		num, _, n := protowire.ConsumeField(b)
+		if extRanges.Has(num) && extDescs[num] == nil {
+			extDescs[num] = nil
+		}
+		b = b[n:]
+	}
+
+	// Transpose the set of descriptors into a list.
+	var xts []*ExtensionDesc
+	for num, xt := range extDescs {
+		if xt == nil {
+			xt = &ExtensionDesc{Field: int32(num)}
+		}
+		xts = append(xts, xt)
+	}
+	return xts, nil
+}
+
+// isValidExtension reports whether xtd is a valid extension descriptor for md.
+func isValidExtension(md protoreflect.MessageDescriptor, xtd protoreflect.ExtensionTypeDescriptor) bool {
+	return xtd.ContainingMessage() == md && md.ExtensionRanges().Has(xtd.Number())
+}
+
+// isScalarKind reports whether k is a protobuf scalar kind (except bytes).
+// This function exists for historical reasons since the representation of
+// scalars differs between v1 and v2, where v1 uses *T and v2 uses T.
+func isScalarKind(k reflect.Kind) bool {
+	switch k {
+	case reflect.Bool, reflect.Int32, reflect.Int64, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64, reflect.String:
+		return true
+	default:
+		return false
+	}
+}
+
+// clearUnknown removes unknown fields from m where remover.Has reports true.
+func clearUnknown(m protoreflect.Message, remover interface {
+	Has(protoreflect.FieldNumber) bool
+}) {
+	var bo protoreflect.RawFields
+	for bi := m.GetUnknown(); len(bi) > 0; {
+		num, _, n := protowire.ConsumeField(bi)
+		if !remover.Has(num) {
+			bo = append(bo, bi[:n]...)
+		}
+		bi = bi[n:]
+	}
+	if bi := m.GetUnknown(); len(bi) != len(bo) {
+		m.SetUnknown(bo)
+	}
+}
+
+type fieldNum protoreflect.FieldNumber
+
+func (n1 fieldNum) Has(n2 protoreflect.FieldNumber) bool {
+	return protoreflect.FieldNumber(n1) == n2
+}

vendor/github.com/golang/protobuf/proto/properties.go

@@ -0,0 +1,306 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+// StructProperties represents protocol buffer type information for a
+// generated protobuf message in the open-struct API.
+//
+// Deprecated: Do not use.
+type StructProperties struct {
+	// Prop are the properties for each field.
+	//
+	// Fields belonging to a oneof are stored in OneofTypes instead, with a
+	// single Properties representing the parent oneof held here.
+	//
+	// The order of Prop matches the order of fields in the Go struct.
+	// Struct fields that are not related to protobufs have a "XXX_" prefix
+	// in the Properties.Name and must be ignored by the user.
+	Prop []*Properties
+
+	// OneofTypes contains information about the oneof fields in this message.
+	// It is keyed by the protobuf field name.
+	OneofTypes map[string]*OneofProperties
+}
+
+// Properties represents the type information for a protobuf message field.
+//
+// Deprecated: Do not use.
+type Properties struct {
+	// Name is a placeholder name with little meaningful semantic value.
+	// If the name has an "XXX_" prefix, the entire Properties must be ignored.
+	Name string
+	// OrigName is the protobuf field name or oneof name.
+	OrigName string
+	// JSONName is the JSON name for the protobuf field.
+	JSONName string
+	// Enum is a placeholder name for enums.
+	// For historical reasons, this is neither the Go name for the enum,
+	// nor the protobuf name for the enum.
+	Enum string // Deprecated: Do not use.
+	// Weak contains the full name of the weakly referenced message.
+	Weak string
+	// Wire is a string representation of the wire type.
+	Wire string
+	// WireType is the protobuf wire type for the field.
+	WireType int
+	// Tag is the protobuf field number.
+	Tag int
+	// Required reports whether this is a required field.
+	Required bool
+	// Optional reports whether this is a optional field.
+	Optional bool
+	// Repeated reports whether this is a repeated field.
+	Repeated bool
+	// Packed reports whether this is a packed repeated field of scalars.
+	Packed bool
+	// Proto3 reports whether this field operates under the proto3 syntax.
+	Proto3 bool
+	// Oneof reports whether this field belongs within a oneof.
+	Oneof bool
+
+	// Default is the default value in string form.
+	Default string
+	// HasDefault reports whether the field has a default value.
+	HasDefault bool
+
+	// MapKeyProp is the properties for the key field for a map field.
+	MapKeyProp *Properties
+	// MapValProp is the properties for the value field for a map field.
+	MapValProp *Properties
+}
+
+// OneofProperties represents the type information for a protobuf oneof.
+//
+// Deprecated: Do not use.
+type OneofProperties struct {
+	// Type is a pointer to the generated wrapper type for the field value.
+	// This is nil for messages that are not in the open-struct API.
+	Type reflect.Type
+	// Field is the index into StructProperties.Prop for the containing oneof.
+	Field int
+	// Prop is the properties for the field.
+	Prop *Properties
+}
+
+// String formats the properties in the protobuf struct field tag style.
+func (p *Properties) String() string {
+	s := p.Wire
+	s += "," + strconv.Itoa(p.Tag)
+	if p.Required {
+		s += ",req"
+	}
+	if p.Optional {
+		s += ",opt"
+	}
+	if p.Repeated {
+		s += ",rep"
+	}
+	if p.Packed {
+		s += ",packed"
+	}
+	s += ",name=" + p.OrigName
+	if p.JSONName != "" {
+		s += ",json=" + p.JSONName
+	}
+	if len(p.Enum) > 0 {
+		s += ",enum=" + p.Enum
+	}
+	if len(p.Weak) > 0 {
+		s += ",weak=" + p.Weak
+	}
+	if p.Proto3 {
+		s += ",proto3"
+	}
+	if p.Oneof {
+		s += ",oneof"
+	}
+	if p.HasDefault {
+		s += ",def=" + p.Default
+	}
+	return s
+}
+
+// Parse populates p by parsing a string in the protobuf struct field tag style.
+func (p *Properties) Parse(tag string) {
+	// For example: "bytes,49,opt,name=foo,def=hello!"
+	for len(tag) > 0 {
+		i := strings.IndexByte(tag, ',')
+		if i < 0 {
+			i = len(tag)
+		}
+		switch s := tag[:i]; {
+		case strings.HasPrefix(s, "name="):
+			p.OrigName = s[len("name="):]
+		case strings.HasPrefix(s, "json="):
+			p.JSONName = s[len("json="):]
+		case strings.HasPrefix(s, "enum="):
+			p.Enum = s[len("enum="):]
+		case strings.HasPrefix(s, "weak="):
+			p.Weak = s[len("weak="):]
+		case strings.Trim(s, "0123456789") == "":
+			n, _ := strconv.ParseUint(s, 10, 32)
+			p.Tag = int(n)
+		case s == "opt":
+			p.Optional = true
+		case s == "req":
+			p.Required = true
+		case s == "rep":
+			p.Repeated = true
+		case s == "varint" || s == "zigzag32" || s == "zigzag64":
+			p.Wire = s
+			p.WireType = WireVarint
+		case s == "fixed32":
+			p.Wire = s
+			p.WireType = WireFixed32
+		case s == "fixed64":
+			p.Wire = s
+			p.WireType = WireFixed64
+		case s == "bytes":
+			p.Wire = s
+			p.WireType = WireBytes
+		case s == "group":
+			p.Wire = s
+			p.WireType = WireStartGroup
+		case s == "packed":
+			p.Packed = true
+		case s == "proto3":
+			p.Proto3 = true
+		case s == "oneof":
+			p.Oneof = true
+		case strings.HasPrefix(s, "def="):
+			// The default tag is special in that everything afterwards is the
+			// default regardless of the presence of commas.
+			p.HasDefault = true
+			p.Default, i = tag[len("def="):], len(tag)
+		}
+		tag = strings.TrimPrefix(tag[i:], ",")
+	}
+}
+
+// Init populates the properties from a protocol buffer struct tag.
+//
+// Deprecated: Do not use.
+func (p *Properties) Init(typ reflect.Type, name, tag string, f *reflect.StructField) {
+	p.Name = name
+	p.OrigName = name
+	if tag == "" {
+		return
+	}
+	p.Parse(tag)
+
+	if typ != nil && typ.Kind() == reflect.Map {
+		p.MapKeyProp = new(Properties)
+		p.MapKeyProp.Init(nil, "Key", f.Tag.Get("protobuf_key"), nil)
+		p.MapValProp = new(Properties)
+		p.MapValProp.Init(nil, "Value", f.Tag.Get("protobuf_val"), nil)
+	}
+}
+
+var propertiesCache sync.Map // map[reflect.Type]*StructProperties
+
+// GetProperties returns the list of properties for the type represented by t,
+// which must be a generated protocol buffer message in the open-struct API,
+// where protobuf message fields are represented by exported Go struct fields.
+//
+// Deprecated: Use protobuf reflection instead.
+func GetProperties(t reflect.Type) *StructProperties {
+	if p, ok := propertiesCache.Load(t); ok {
+		return p.(*StructProperties)
+	}
+	p, _ := propertiesCache.LoadOrStore(t, newProperties(t))
+	return p.(*StructProperties)
+}
+
+func newProperties(t reflect.Type) *StructProperties {
+	if t.Kind() != reflect.Struct {
+		panic(fmt.Sprintf("%v is not a generated message in the open-struct API", t))
+	}
+
+	var hasOneof bool
+	prop := new(StructProperties)
+
+	// Construct a list of properties for each field in the struct.
+	for i := 0; i < t.NumField(); i++ {
+		p := new(Properties)
+		f := t.Field(i)
+		tagField := f.Tag.Get("protobuf")
+		p.Init(f.Type, f.Name, tagField, &f)
+
+		tagOneof := f.Tag.Get("protobuf_oneof")
+		if tagOneof != "" {
+			hasOneof = true
+			p.OrigName = tagOneof
+		}
+
+		// Rename unrelated struct fields with the "XXX_" prefix since so much
+		// user code simply checks for this to exclude special fields.
+		if tagField == "" && tagOneof == "" && !strings.HasPrefix(p.Name, "XXX_") {
+			p.Name = "XXX_" + p.Name
+			p.OrigName = "XXX_" + p.OrigName
+		} else if p.Weak != "" {
+			p.Name = p.OrigName // avoid possible "XXX_" prefix on weak field
+		}
+
+		prop.Prop = append(prop.Prop, p)
+	}
+
+	// Construct a mapping of oneof field names to properties.
+	if hasOneof {
+		var oneofWrappers []interface{}
+		if fn, ok := reflect.PtrTo(t).MethodByName("XXX_OneofFuncs"); ok {
+			oneofWrappers = fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))})[3].Interface().([]interface{})
+		}
+		if fn, ok := reflect.PtrTo(t).MethodByName("XXX_OneofWrappers"); ok {
+			oneofWrappers = fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))})[0].Interface().([]interface{})
+		}
+		if m, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(protoreflect.ProtoMessage); ok {
+			if m, ok := m.ProtoReflect().(interface{ ProtoMessageInfo() *protoimpl.MessageInfo }); ok {
+				oneofWrappers = m.ProtoMessageInfo().OneofWrappers
+			}
+		}
+
+		prop.OneofTypes = make(map[string]*OneofProperties)
+		for _, wrapper := range oneofWrappers {
+			p := &OneofProperties{
+				Type: reflect.ValueOf(wrapper).Type(), // *T
+				Prop: new(Properties),
+			}
+			f := p.Type.Elem().Field(0)
+			p.Prop.Name = f.Name
+			p.Prop.Parse(f.Tag.Get("protobuf"))
+
+			// Determine the struct field that contains this oneof.
+			// Each wrapper is assignable to exactly one parent field.
+			var foundOneof bool
+			for i := 0; i < t.NumField() && !foundOneof; i++ {
+				if p.Type.AssignableTo(t.Field(i).Type) {
+					p.Field = i
+					foundOneof = true
+				}
+			}
+			if !foundOneof {
+				panic(fmt.Sprintf("%v is not a generated message in the open-struct API", t))
+			}
+			prop.OneofTypes[p.Prop.OrigName] = p
+		}
+	}
+
+	return prop
+}
+
+func (sp *StructProperties) Len() int           { return len(sp.Prop) }
+func (sp *StructProperties) Less(i, j int) bool { return false }
+func (sp *StructProperties) Swap(i, j int)      { return }

vendor/github.com/golang/protobuf/proto/proto.go

@@ -0,0 +1,167 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package proto provides functionality for handling protocol buffer messages.
+// In particular, it provides marshaling and unmarshaling between a protobuf
+// message and the binary wire format.
+//
+// See https://developers.google.com/protocol-buffers/docs/gotutorial for
+// more information.
+//
+// Deprecated: Use the "google.golang.org/protobuf/proto" package instead.
+package proto
+
+import (
+	protoV2 "google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/runtime/protoiface"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	ProtoPackageIsVersion1 = true
+	ProtoPackageIsVersion2 = true
+	ProtoPackageIsVersion3 = true
+	ProtoPackageIsVersion4 = true
+)
+
+// GeneratedEnum is any enum type generated by protoc-gen-go
+// which is a named int32 kind.
+// This type exists for documentation purposes.
+type GeneratedEnum interface{}
+
+// GeneratedMessage is any message type generated by protoc-gen-go
+// which is a pointer to a named struct kind.
+// This type exists for documentation purposes.
+type GeneratedMessage interface{}
+
+// Message is a protocol buffer message.
+//
+// This is the v1 version of the message interface and is marginally better
+// than an empty interface as it lacks any method to programatically interact
+// with the contents of the message.
+//
+// A v2 message is declared in "google.golang.org/protobuf/proto".Message and
+// exposes protobuf reflection as a first-class feature of the interface.
+//
+// To convert a v1 message to a v2 message, use the MessageV2 function.
+// To convert a v2 message to a v1 message, use the MessageV1 function.
+type Message = protoiface.MessageV1
+
+// MessageV1 converts either a v1 or v2 message to a v1 message.
+// It returns nil if m is nil.
+func MessageV1(m GeneratedMessage) protoiface.MessageV1 {
+	return protoimpl.X.ProtoMessageV1Of(m)
+}
+
+// MessageV2 converts either a v1 or v2 message to a v2 message.
+// It returns nil if m is nil.
+func MessageV2(m GeneratedMessage) protoV2.Message {
+	return protoimpl.X.ProtoMessageV2Of(m)
+}
+
+// MessageReflect returns a reflective view for a message.
+// It returns nil if m is nil.
+func MessageReflect(m Message) protoreflect.Message {
+	return protoimpl.X.MessageOf(m)
+}
+
+// Marshaler is implemented by messages that can marshal themselves.
+// This interface is used by the following functions: Size, Marshal,
+// Buffer.Marshal, and Buffer.EncodeMessage.
+//
+// Deprecated: Do not implement.
+type Marshaler interface {
+	// Marshal formats the encoded bytes of the message.
+	// It should be deterministic and emit valid protobuf wire data.
+	// The caller takes ownership of the returned buffer.
+	Marshal() ([]byte, error)
+}
+
+// Unmarshaler is implemented by messages that can unmarshal themselves.
+// This interface is used by the following functions: Unmarshal, UnmarshalMerge,
+// Buffer.Unmarshal, Buffer.DecodeMessage, and Buffer.DecodeGroup.
+//
+// Deprecated: Do not implement.
+type Unmarshaler interface {
+	// Unmarshal parses the encoded bytes of the protobuf wire input.
+	// The provided buffer is only valid for during method call.
+	// It should not reset the receiver message.
+	Unmarshal([]byte) error
+}
+
+// Merger is implemented by messages that can merge themselves.
+// This interface is used by the following functions: Clone and Merge.
+//
+// Deprecated: Do not implement.
+type Merger interface {
+	// Merge merges the contents of src into the receiver message.
+	// It clones all data structures in src such that it aliases no mutable
+	// memory referenced by src.
+	Merge(src Message)
+}
+
+// RequiredNotSetError is an error type returned when
+// marshaling or unmarshaling a message with missing required fields.
+type RequiredNotSetError struct {
+	err error
+}
+
+func (e *RequiredNotSetError) Error() string {
+	if e.err != nil {
+		return e.err.Error()
+	}
+	return "proto: required field not set"
+}
+func (e *RequiredNotSetError) RequiredNotSet() bool {
+	return true
+}
+
+func checkRequiredNotSet(m protoV2.Message) error {
+	if err := protoV2.CheckInitialized(m); err != nil {
+		return &RequiredNotSetError{err: err}
+	}
+	return nil
+}
+
+// Clone returns a deep copy of src.
+func Clone(src Message) Message {
+	return MessageV1(protoV2.Clone(MessageV2(src)))
+}
+
+// Merge merges src into dst, which must be messages of the same type.
+//
+// Populated scalar fields in src are copied to dst, while populated
+// singular messages in src are merged into dst by recursively calling Merge.
+// The elements of every list field in src is appended to the corresponded
+// list fields in dst. The entries of every map field in src is copied into
+// the corresponding map field in dst, possibly replacing existing entries.
+// The unknown fields of src are appended to the unknown fields of dst.
+func Merge(dst, src Message) {
+	protoV2.Merge(MessageV2(dst), MessageV2(src))
+}
+
+// Equal reports whether two messages are equal.
+// If two messages marshal to the same bytes under deterministic serialization,
+// then Equal is guaranteed to report true.
+//
+// Two messages are equal if they are the same protobuf message type,
+// have the same set of populated known and extension field values,
+// and the same set of unknown fields values.
+//
+// Scalar values are compared with the equivalent of the == operator in Go,
+// except bytes values which are compared using bytes.Equal and
+// floating point values which specially treat NaNs as equal.
+// Message values are compared by recursively calling Equal.
+// Lists are equal if each element value is also equal.
+// Maps are equal if they have the same set of keys, where the pair of values
+// for each key is also equal.
+func Equal(x, y Message) bool {
+	return protoV2.Equal(MessageV2(x), MessageV2(y))
+}
+
+func isMessageSet(md protoreflect.MessageDescriptor) bool {
+	ms, ok := md.(interface{ IsMessageSet() bool })
+	return ok && ms.IsMessageSet()
+}

vendor/github.com/golang/protobuf/proto/registry.go

@@ -0,0 +1,323 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io/ioutil"
+	"reflect"
+	"strings"
+	"sync"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+// filePath is the path to the proto source file.
+type filePath = string // e.g., "google/protobuf/descriptor.proto"
+
+// fileDescGZIP is the compressed contents of the encoded FileDescriptorProto.
+type fileDescGZIP = []byte
+
+var fileCache sync.Map // map[filePath]fileDescGZIP
+
+// RegisterFile is called from generated code to register the compressed
+// FileDescriptorProto with the file path for a proto source file.
+//
+// Deprecated: Use protoregistry.GlobalFiles.RegisterFile instead.
+func RegisterFile(s filePath, d fileDescGZIP) {
+	// Decompress the descriptor.
+	zr, err := gzip.NewReader(bytes.NewReader(d))
+	if err != nil {
+		panic(fmt.Sprintf("proto: invalid compressed file descriptor: %v", err))
+	}
+	b, err := ioutil.ReadAll(zr)
+	if err != nil {
+		panic(fmt.Sprintf("proto: invalid compressed file descriptor: %v", err))
+	}
+
+	// Construct a protoreflect.FileDescriptor from the raw descriptor.
+	// Note that DescBuilder.Build automatically registers the constructed
+	// file descriptor with the v2 registry.
+	protoimpl.DescBuilder{RawDescriptor: b}.Build()
+
+	// Locally cache the raw descriptor form for the file.
+	fileCache.Store(s, d)
+}
+
+// FileDescriptor returns the compressed FileDescriptorProto given the file path
+// for a proto source file. It returns nil if not found.
+//
+// Deprecated: Use protoregistry.GlobalFiles.FindFileByPath instead.
+func FileDescriptor(s filePath) fileDescGZIP {
+	if v, ok := fileCache.Load(s); ok {
+		return v.(fileDescGZIP)
+	}
+
+	// Find the descriptor in the v2 registry.
+	var b []byte
+	if fd, _ := protoregistry.GlobalFiles.FindFileByPath(s); fd != nil {
+		if fd, ok := fd.(interface{ ProtoLegacyRawDesc() []byte }); ok {
+			b = fd.ProtoLegacyRawDesc()
+		} else {
+			// TODO: Use protodesc.ToFileDescriptorProto to construct
+			// a descriptorpb.FileDescriptorProto and marshal it.
+			// However, doing so causes the proto package to have a dependency
+			// on descriptorpb, leading to cyclic dependency issues.
+		}
+	}
+
+	// Locally cache the raw descriptor form for the file.
+	if len(b) > 0 {
+		v, _ := fileCache.LoadOrStore(s, protoimpl.X.CompressGZIP(b))
+		return v.(fileDescGZIP)
+	}
+	return nil
+}
+
+// enumName is the name of an enum. For historical reasons, the enum name is
+// neither the full Go name nor the full protobuf name of the enum.
+// The name is the dot-separated combination of just the proto package that the
+// enum is declared within followed by the Go type name of the generated enum.
+type enumName = string // e.g., "my.proto.package.GoMessage_GoEnum"
+
+// enumsByName maps enum values by name to their numeric counterpart.
+type enumsByName = map[string]int32
+
+// enumsByNumber maps enum values by number to their name counterpart.
+type enumsByNumber = map[int32]string
+
+var enumCache sync.Map     // map[enumName]enumsByName
+var numFilesCache sync.Map // map[protoreflect.FullName]int
+
+// RegisterEnum is called from the generated code to register the mapping of
+// enum value names to enum numbers for the enum identified by s.
+//
+// Deprecated: Use protoregistry.GlobalTypes.RegisterEnum instead.
+func RegisterEnum(s enumName, _ enumsByNumber, m enumsByName) {
+	if _, ok := enumCache.Load(s); ok {
+		panic("proto: duplicate enum registered: " + s)
+	}
+	enumCache.Store(s, m)
+
+	// This does not forward registration to the v2 registry since this API
+	// lacks sufficient information to construct a complete v2 enum descriptor.
+}
+
+// EnumValueMap returns the mapping from enum value names to enum numbers for
+// the enum of the given name. It returns nil if not found.
+//
+// Deprecated: Use protoregistry.GlobalTypes.FindEnumByName instead.
+func EnumValueMap(s enumName) enumsByName {
+	if v, ok := enumCache.Load(s); ok {
+		return v.(enumsByName)
+	}
+
+	// Check whether the cache is stale. If the number of files in the current
+	// package differs, then it means that some enums may have been recently
+	// registered upstream that we do not know about.
+	var protoPkg protoreflect.FullName
+	if i := strings.LastIndexByte(s, '.'); i >= 0 {
+		protoPkg = protoreflect.FullName(s[:i])
+	}
+	v, _ := numFilesCache.Load(protoPkg)
+	numFiles, _ := v.(int)
+	if protoregistry.GlobalFiles.NumFilesByPackage(protoPkg) == numFiles {
+		return nil // cache is up-to-date; was not found earlier
+	}
+
+	// Update the enum cache for all enums declared in the given proto package.
+	numFiles = 0
+	protoregistry.GlobalFiles.RangeFilesByPackage(protoPkg, func(fd protoreflect.FileDescriptor) bool {
+		walkEnums(fd, func(ed protoreflect.EnumDescriptor) {
+			name := protoimpl.X.LegacyEnumName(ed)
+			if _, ok := enumCache.Load(name); !ok {
+				m := make(enumsByName)
+				evs := ed.Values()
+				for i := evs.Len() - 1; i >= 0; i-- {
+					ev := evs.Get(i)
+					m[string(ev.Name())] = int32(ev.Number())
+				}
+				enumCache.LoadOrStore(name, m)
+			}
+		})
+		numFiles++
+		return true
+	})
+	numFilesCache.Store(protoPkg, numFiles)
+
+	// Check cache again for enum map.
+	if v, ok := enumCache.Load(s); ok {
+		return v.(enumsByName)
+	}
+	return nil
+}
+
+// walkEnums recursively walks all enums declared in d.
+func walkEnums(d interface {
+	Enums() protoreflect.EnumDescriptors
+	Messages() protoreflect.MessageDescriptors
+}, f func(protoreflect.EnumDescriptor)) {
+	eds := d.Enums()
+	for i := eds.Len() - 1; i >= 0; i-- {
+		f(eds.Get(i))
+	}
+	mds := d.Messages()
+	for i := mds.Len() - 1; i >= 0; i-- {
+		walkEnums(mds.Get(i), f)
+	}
+}
+
+// messageName is the full name of protobuf message.
+type messageName = string
+
+var messageTypeCache sync.Map // map[messageName]reflect.Type
+
+// RegisterType is called from generated code to register the message Go type
+// for a message of the given name.
+//
+// Deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.
+func RegisterType(m Message, s messageName) {
+	mt := protoimpl.X.LegacyMessageTypeOf(m, protoreflect.FullName(s))
+	if err := protoregistry.GlobalTypes.RegisterMessage(mt); err != nil {
+		panic(err)
+	}
+	messageTypeCache.Store(s, reflect.TypeOf(m))
+}
+
+// RegisterMapType is called from generated code to register the Go map type
+// for a protobuf message representing a map entry.
+//
+// Deprecated: Do not use.
+func RegisterMapType(m interface{}, s messageName) {
+	t := reflect.TypeOf(m)
+	if t.Kind() != reflect.Map {
+		panic(fmt.Sprintf("invalid map kind: %v", t))
+	}
+	if _, ok := messageTypeCache.Load(s); ok {
+		panic(fmt.Errorf("proto: duplicate proto message registered: %s", s))
+	}
+	messageTypeCache.Store(s, t)
+}
+
+// MessageType returns the message type for a named message.
+// It returns nil if not found.
+//
+// Deprecated: Use protoregistry.GlobalTypes.FindMessageByName instead.
+func MessageType(s messageName) reflect.Type {
+	if v, ok := messageTypeCache.Load(s); ok {
+		return v.(reflect.Type)
+	}
+
+	// Derive the message type from the v2 registry.
+	var t reflect.Type
+	if mt, _ := protoregistry.GlobalTypes.FindMessageByName(protoreflect.FullName(s)); mt != nil {
+		t = messageGoType(mt)
+	}
+
+	// If we could not get a concrete type, it is possible that it is a
+	// pseudo-message for a map entry.
+	if t == nil {
+		d, _ := protoregistry.GlobalFiles.FindDescriptorByName(protoreflect.FullName(s))
+		if md, _ := d.(protoreflect.MessageDescriptor); md != nil && md.IsMapEntry() {
+			kt := goTypeForField(md.Fields().ByNumber(1))
+			vt := goTypeForField(md.Fields().ByNumber(2))
+			t = reflect.MapOf(kt, vt)
+		}
+	}
+
+	// Locally cache the message type for the given name.
+	if t != nil {
+		v, _ := messageTypeCache.LoadOrStore(s, t)
+		return v.(reflect.Type)
+	}
+	return nil
+}
+
+func goTypeForField(fd protoreflect.FieldDescriptor) reflect.Type {
+	switch k := fd.Kind(); k {
+	case protoreflect.EnumKind:
+		if et, _ := protoregistry.GlobalTypes.FindEnumByName(fd.Enum().FullName()); et != nil {
+			return enumGoType(et)
+		}
+		return reflect.TypeOf(protoreflect.EnumNumber(0))
+	case protoreflect.MessageKind, protoreflect.GroupKind:
+		if mt, _ := protoregistry.GlobalTypes.FindMessageByName(fd.Message().FullName()); mt != nil {
+			return messageGoType(mt)
+		}
+		return reflect.TypeOf((*protoreflect.Message)(nil)).Elem()
+	default:
+		return reflect.TypeOf(fd.Default().Interface())
+	}
+}
+
+func enumGoType(et protoreflect.EnumType) reflect.Type {
+	return reflect.TypeOf(et.New(0))
+}
+
+func messageGoType(mt protoreflect.MessageType) reflect.Type {
+	return reflect.TypeOf(MessageV1(mt.Zero().Interface()))
+}
+
+// MessageName returns the full protobuf name for the given message type.
+//
+// Deprecated: Use protoreflect.MessageDescriptor.FullName instead.
+func MessageName(m Message) messageName {
+	if m == nil {
+		return ""
+	}
+	if m, ok := m.(interface{ XXX_MessageName() messageName }); ok {
+		return m.XXX_MessageName()
+	}
+	return messageName(protoimpl.X.MessageDescriptorOf(m).FullName())
+}
+
+// RegisterExtension is called from the generated code to register
+// the extension descriptor.
+//
+// Deprecated: Use protoregistry.GlobalTypes.RegisterExtension instead.
+func RegisterExtension(d *ExtensionDesc) {
+	if err := protoregistry.GlobalTypes.RegisterExtension(d); err != nil {
+		panic(err)
+	}
+}
+
+type extensionsByNumber = map[int32]*ExtensionDesc
+
+var extensionCache sync.Map // map[messageName]extensionsByNumber
+
+// RegisteredExtensions returns a map of the registered extensions for the
+// provided protobuf message, indexed by the extension field number.
+//
+// Deprecated: Use protoregistry.GlobalTypes.RangeExtensionsByMessage instead.
+func RegisteredExtensions(m Message) extensionsByNumber {
+	// Check whether the cache is stale. If the number of extensions for
+	// the given message differs, then it means that some extensions were
+	// recently registered upstream that we do not know about.
+	s := MessageName(m)
+	v, _ := extensionCache.Load(s)
+	xs, _ := v.(extensionsByNumber)
+	if protoregistry.GlobalTypes.NumExtensionsByMessage(protoreflect.FullName(s)) == len(xs) {
+		return xs // cache is up-to-date
+	}
+
+	// Cache is stale, re-compute the extensions map.
+	xs = make(extensionsByNumber)
+	protoregistry.GlobalTypes.RangeExtensionsByMessage(protoreflect.FullName(s), func(xt protoreflect.ExtensionType) bool {
+		if xd, ok := xt.(*ExtensionDesc); ok {
+			xs[int32(xt.TypeDescriptor().Number())] = xd
+		} else {
+			// TODO: This implies that the protoreflect.ExtensionType is a
+			// custom type not generated by protoc-gen-go. We could try and
+			// convert the type to an ExtensionDesc.
+		}
+		return true
+	})
+	extensionCache.Store(s, xs)
+	return xs
+}

vendor/github.com/golang/protobuf/proto/text_decode.go

@@ -0,0 +1,801 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"encoding"
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"google.golang.org/protobuf/encoding/prototext"
+	protoV2 "google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+const wrapTextUnmarshalV2 = false
+
+// ParseError is returned by UnmarshalText.
+type ParseError struct {
+	Message string
+
+	// Deprecated: Do not use.
+	Line, Offset int
+}
+
+func (e *ParseError) Error() string {
+	if wrapTextUnmarshalV2 {
+		return e.Message
+	}
+	if e.Line == 1 {
+		return fmt.Sprintf("line 1.%d: %v", e.Offset, e.Message)
+	}
+	return fmt.Sprintf("line %d: %v", e.Line, e.Message)
+}
+
+// UnmarshalText parses a proto text formatted string into m.
+func UnmarshalText(s string, m Message) error {
+	if u, ok := m.(encoding.TextUnmarshaler); ok {
+		return u.UnmarshalText([]byte(s))
+	}
+
+	m.Reset()
+	mi := MessageV2(m)
+
+	if wrapTextUnmarshalV2 {
+		err := prototext.UnmarshalOptions{
+			AllowPartial: true,
+		}.Unmarshal([]byte(s), mi)
+		if err != nil {
+			return &ParseError{Message: err.Error()}
+		}
+		return checkRequiredNotSet(mi)
+	} else {
+		if err := newTextParser(s).unmarshalMessage(mi.ProtoReflect(), ""); err != nil {
+			return err
+		}
+		return checkRequiredNotSet(mi)
+	}
+}
+
+type textParser struct {
+	s            string // remaining input
+	done         bool   // whether the parsing is finished (success or error)
+	backed       bool   // whether back() was called
+	offset, line int
+	cur          token
+}
+
+type token struct {
+	value    string
+	err      *ParseError
+	line     int    // line number
+	offset   int    // byte number from start of input, not start of line
+	unquoted string // the unquoted version of value, if it was a quoted string
+}
+
+func newTextParser(s string) *textParser {
+	p := new(textParser)
+	p.s = s
+	p.line = 1
+	p.cur.line = 1
+	return p
+}
+
+func (p *textParser) unmarshalMessage(m protoreflect.Message, terminator string) (err error) {
+	md := m.Descriptor()
+	fds := md.Fields()
+
+	// A struct is a sequence of "name: value", terminated by one of
+	// '>' or '}', or the end of the input.  A name may also be
+	// "[extension]" or "[type/url]".
+	//
+	// The whole struct can also be an expanded Any message, like:
+	// [type/url] < ... struct contents ... >
+	seen := make(map[protoreflect.FieldNumber]bool)
+	for {
+		tok := p.next()
+		if tok.err != nil {
+			return tok.err
+		}
+		if tok.value == terminator {
+			break
+		}
+		if tok.value == "[" {
+			if err := p.unmarshalExtensionOrAny(m, seen); err != nil {
+				return err
+			}
+			continue
+		}
+
+		// This is a normal, non-extension field.
+		name := protoreflect.Name(tok.value)
+		fd := fds.ByName(name)
+		switch {
+		case fd == nil:
+			gd := fds.ByName(protoreflect.Name(strings.ToLower(string(name))))
+			if gd != nil && gd.Kind() == protoreflect.GroupKind && gd.Message().Name() == name {
+				fd = gd
+			}
+		case fd.Kind() == protoreflect.GroupKind && fd.Message().Name() != name:
+			fd = nil
+		case fd.IsWeak() && fd.Message().IsPlaceholder():
+			fd = nil
+		}
+		if fd == nil {
+			typeName := string(md.FullName())
+			if m, ok := m.Interface().(Message); ok {
+				t := reflect.TypeOf(m)
+				if t.Kind() == reflect.Ptr {
+					typeName = t.Elem().String()
+				}
+			}
+			return p.errorf("unknown field name %q in %v", name, typeName)
+		}
+		if od := fd.ContainingOneof(); od != nil && m.WhichOneof(od) != nil {
+			return p.errorf("field '%s' would overwrite already parsed oneof '%s'", name, od.Name())
+		}
+		if fd.Cardinality() != protoreflect.Repeated && seen[fd.Number()] {
+			return p.errorf("non-repeated field %q was repeated", fd.Name())
+		}
+		seen[fd.Number()] = true
+
+		// Consume any colon.
+		if err := p.checkForColon(fd); err != nil {
+			return err
+		}
+
+		// Parse into the field.
+		v := m.Get(fd)
+		if !m.Has(fd) && (fd.IsList() || fd.IsMap() || fd.Message() != nil) {
+			v = m.Mutable(fd)
+		}
+		if v, err = p.unmarshalValue(v, fd); err != nil {
+			return err
+		}
+		m.Set(fd, v)
+
+		if err := p.consumeOptionalSeparator(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (p *textParser) unmarshalExtensionOrAny(m protoreflect.Message, seen map[protoreflect.FieldNumber]bool) error {
+	name, err := p.consumeExtensionOrAnyName()
+	if err != nil {
+		return err
+	}
+
+	// If it contains a slash, it's an Any type URL.
+	if slashIdx := strings.LastIndex(name, "/"); slashIdx >= 0 {
+		tok := p.next()
+		if tok.err != nil {
+			return tok.err
+		}
+		// consume an optional colon
+		if tok.value == ":" {
+			tok = p.next()
+			if tok.err != nil {
+				return tok.err
+			}
+		}
+
+		var terminator string
+		switch tok.value {
+		case "<":
+			terminator = ">"
+		case "{":
+			terminator = "}"
+		default:
+			return p.errorf("expected '{' or '<', found %q", tok.value)
+		}
+
+		mt, err := protoregistry.GlobalTypes.FindMessageByURL(name)
+		if err != nil {
+			return p.errorf("unrecognized message %q in google.protobuf.Any", name[slashIdx+len("/"):])
+		}
+		m2 := mt.New()
+		if err := p.unmarshalMessage(m2, terminator); err != nil {
+			return err
+		}
+		b, err := protoV2.Marshal(m2.Interface())
+		if err != nil {
+			return p.errorf("failed to marshal message of type %q: %v", name[slashIdx+len("/"):], err)
+		}
+
+		urlFD := m.Descriptor().Fields().ByName("type_url")
+		valFD := m.Descriptor().Fields().ByName("value")
+		if seen[urlFD.Number()] {
+			return p.errorf("Any message unpacked multiple times, or %q already set", urlFD.Name())
+		}
+		if seen[valFD.Number()] {
+			return p.errorf("Any message unpacked multiple times, or %q already set", valFD.Name())
+		}
+		m.Set(urlFD, protoreflect.ValueOfString(name))
+		m.Set(valFD, protoreflect.ValueOfBytes(b))
+		seen[urlFD.Number()] = true
+		seen[valFD.Number()] = true
+		return nil
+	}
+
+	xname := protoreflect.FullName(name)
+	xt, _ := protoregistry.GlobalTypes.FindExtensionByName(xname)
+	if xt == nil && isMessageSet(m.Descriptor()) {
+		xt, _ = protoregistry.GlobalTypes.FindExtensionByName(xname.Append("message_set_extension"))
+	}
+	if xt == nil {
+		return p.errorf("unrecognized extension %q", name)
+	}
+	fd := xt.TypeDescriptor()
+	if fd.ContainingMessage().FullName() != m.Descriptor().FullName() {
+		return p.errorf("extension field %q does not extend message %q", name, m.Descriptor().FullName())
+	}
+
+	if err := p.checkForColon(fd); err != nil {
+		return err
+	}
+
+	v := m.Get(fd)
+	if !m.Has(fd) && (fd.IsList() || fd.IsMap() || fd.Message() != nil) {
+		v = m.Mutable(fd)
+	}
+	v, err = p.unmarshalValue(v, fd)
+	if err != nil {
+		return err
+	}
+	m.Set(fd, v)
+	return p.consumeOptionalSeparator()
+}
+
+func (p *textParser) unmarshalValue(v protoreflect.Value, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
+	tok := p.next()
+	if tok.err != nil {
+		return v, tok.err
+	}
+	if tok.value == "" {
+		return v, p.errorf("unexpected EOF")
+	}
+
+	switch {
+	case fd.IsList():
+		lv := v.List()
+		var err error
+		if tok.value == "[" {
+			// Repeated field with list notation, like [1,2,3].
+			for {
+				vv := lv.NewElement()
+				vv, err = p.unmarshalSingularValue(vv, fd)
+				if err != nil {
+					return v, err
+				}
+				lv.Append(vv)
+
+				tok := p.next()
+				if tok.err != nil {
+					return v, tok.err
+				}
+				if tok.value == "]" {
+					break
+				}
+				if tok.value != "," {
+					return v, p.errorf("Expected ']' or ',' found %q", tok.value)
+				}
+			}
+			return v, nil
+		}
+
+		// One value of the repeated field.
+		p.back()
+		vv := lv.NewElement()
+		vv, err = p.unmarshalSingularValue(vv, fd)
+		if err != nil {
+			return v, err
+		}
+		lv.Append(vv)
+		return v, nil
+	case fd.IsMap():
+		// The map entry should be this sequence of tokens:
+		//	< key : KEY value : VALUE >
+		// However, implementations may omit key or value, and technically
+		// we should support them in any order.
+		var terminator string
+		switch tok.value {
+		case "<":
+			terminator = ">"
+		case "{":
+			terminator = "}"
+		default:
+			return v, p.errorf("expected '{' or '<', found %q", tok.value)
+		}
+
+		keyFD := fd.MapKey()
+		valFD := fd.MapValue()
+
+		mv := v.Map()
+		kv := keyFD.Default()
+		vv := mv.NewValue()
+		for {
+			tok := p.next()
+			if tok.err != nil {
+				return v, tok.err
+			}
+			if tok.value == terminator {
+				break
+			}
+			var err error
+			switch tok.value {
+			case "key":
+				if err := p.consumeToken(":"); err != nil {
+					return v, err
+				}
+				if kv, err = p.unmarshalSingularValue(kv, keyFD); err != nil {
+					return v, err
+				}
+				if err := p.consumeOptionalSeparator(); err != nil {
+					return v, err
+				}
+			case "value":
+				if err := p.checkForColon(valFD); err != nil {
+					return v, err
+				}
+				if vv, err = p.unmarshalSingularValue(vv, valFD); err != nil {
+					return v, err
+				}
+				if err := p.consumeOptionalSeparator(); err != nil {
+					return v, err
+				}
+			default:
+				p.back()
+				return v, p.errorf(`expected "key", "value", or %q, found %q`, terminator, tok.value)
+			}
+		}
+		mv.Set(kv.MapKey(), vv)
+		return v, nil
+	default:
+		p.back()
+		return p.unmarshalSingularValue(v, fd)
+	}
+}
+
+func (p *textParser) unmarshalSingularValue(v protoreflect.Value, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
+	tok := p.next()
+	if tok.err != nil {
+		return v, tok.err
+	}
+	if tok.value == "" {
+		return v, p.errorf("unexpected EOF")
+	}
+
+	switch fd.Kind() {
+	case protoreflect.BoolKind:
+		switch tok.value {
+		case "true", "1", "t", "True":
+			return protoreflect.ValueOfBool(true), nil
+		case "false", "0", "f", "False":
+			return protoreflect.ValueOfBool(false), nil
+		}
+	case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
+		if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
+			return protoreflect.ValueOfInt32(int32(x)), nil
+		}
+
+		// The C++ parser accepts large positive hex numbers that uses
+		// two's complement arithmetic to represent negative numbers.
+		// This feature is here for backwards compatibility with C++.
+		if strings.HasPrefix(tok.value, "0x") {
+			if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
+				return protoreflect.ValueOfInt32(int32(-(int64(^x) + 1))), nil
+			}
+		}
+	case protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
+		if x, err := strconv.ParseInt(tok.value, 0, 64); err == nil {
+			return protoreflect.ValueOfInt64(int64(x)), nil
+		}
+
+		// The C++ parser accepts large positive hex numbers that uses
+		// two's complement arithmetic to represent negative numbers.
+		// This feature is here for backwards compatibility with C++.
+		if strings.HasPrefix(tok.value, "0x") {
+			if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
+				return protoreflect.ValueOfInt64(int64(-(int64(^x) + 1))), nil
+			}
+		}
+	case protoreflect.Uint32Kind, protoreflect.Fixed32Kind:
+		if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
+			return protoreflect.ValueOfUint32(uint32(x)), nil
+		}
+	case protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
+		if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
+			return protoreflect.ValueOfUint64(uint64(x)), nil
+		}
+	case protoreflect.FloatKind:
+		// Ignore 'f' for compatibility with output generated by C++,
+		// but don't remove 'f' when the value is "-inf" or "inf".
+		v := tok.value
+		if strings.HasSuffix(v, "f") && v != "-inf" && v != "inf" {
+			v = v[:len(v)-len("f")]
+		}
+		if x, err := strconv.ParseFloat(v, 32); err == nil {
+			return protoreflect.ValueOfFloat32(float32(x)), nil
+		}
+	case protoreflect.DoubleKind:
+		// Ignore 'f' for compatibility with output generated by C++,
+		// but don't remove 'f' when the value is "-inf" or "inf".
+		v := tok.value
+		if strings.HasSuffix(v, "f") && v != "-inf" && v != "inf" {
+			v = v[:len(v)-len("f")]
+		}
+		if x, err := strconv.ParseFloat(v, 64); err == nil {
+			return protoreflect.ValueOfFloat64(float64(x)), nil
+		}
+	case protoreflect.StringKind:
+		if isQuote(tok.value[0]) {
+			return protoreflect.ValueOfString(tok.unquoted), nil
+		}
+	case protoreflect.BytesKind:
+		if isQuote(tok.value[0]) {
+			return protoreflect.ValueOfBytes([]byte(tok.unquoted)), nil
+		}
+	case protoreflect.EnumKind:
+		if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
+			return protoreflect.ValueOfEnum(protoreflect.EnumNumber(x)), nil
+		}
+		vd := fd.Enum().Values().ByName(protoreflect.Name(tok.value))
+		if vd != nil {
+			return protoreflect.ValueOfEnum(vd.Number()), nil
+		}
+	case protoreflect.MessageKind, protoreflect.GroupKind:
+		var terminator string
+		switch tok.value {
+		case "{":
+			terminator = "}"
+		case "<":
+			terminator = ">"
+		default:
+			return v, p.errorf("expected '{' or '<', found %q", tok.value)
+		}
+		err := p.unmarshalMessage(v.Message(), terminator)
+		return v, err
+	default:
+		panic(fmt.Sprintf("invalid kind %v", fd.Kind()))
+	}
+	return v, p.errorf("invalid %v: %v", fd.Kind(), tok.value)
+}
+
+// Consume a ':' from the input stream (if the next token is a colon),
+// returning an error if a colon is needed but not present.
+func (p *textParser) checkForColon(fd protoreflect.FieldDescriptor) *ParseError {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != ":" {
+		if fd.Message() == nil {
+			return p.errorf("expected ':', found %q", tok.value)
+		}
+		p.back()
+	}
+	return nil
+}
+
+// consumeExtensionOrAnyName consumes an extension name or an Any type URL and
+// the following ']'. It returns the name or URL consumed.
+func (p *textParser) consumeExtensionOrAnyName() (string, error) {
+	tok := p.next()
+	if tok.err != nil {
+		return "", tok.err
+	}
+
+	// If extension name or type url is quoted, it's a single token.
+	if len(tok.value) > 2 && isQuote(tok.value[0]) && tok.value[len(tok.value)-1] == tok.value[0] {
+		name, err := unquoteC(tok.value[1:len(tok.value)-1], rune(tok.value[0]))
+		if err != nil {
+			return "", err
+		}
+		return name, p.consumeToken("]")
+	}
+
+	// Consume everything up to "]"
+	var parts []string
+	for tok.value != "]" {
+		parts = append(parts, tok.value)
+		tok = p.next()
+		if tok.err != nil {
+			return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
+		}
+		if p.done && tok.value != "]" {
+			return "", p.errorf("unclosed type_url or extension name")
+		}
+	}
+	return strings.Join(parts, ""), nil
+}
+
+// consumeOptionalSeparator consumes an optional semicolon or comma.
+// It is used in unmarshalMessage to provide backward compatibility.
+func (p *textParser) consumeOptionalSeparator() error {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != ";" && tok.value != "," {
+		p.back()
+	}
+	return nil
+}
+
+func (p *textParser) errorf(format string, a ...interface{}) *ParseError {
+	pe := &ParseError{fmt.Sprintf(format, a...), p.cur.line, p.cur.offset}
+	p.cur.err = pe
+	p.done = true
+	return pe
+}
+
+func (p *textParser) skipWhitespace() {
+	i := 0
+	for i < len(p.s) && (isWhitespace(p.s[i]) || p.s[i] == '#') {
+		if p.s[i] == '#' {
+			// comment; skip to end of line or input
+			for i < len(p.s) && p.s[i] != '\n' {
+				i++
+			}
+			if i == len(p.s) {
+				break
+			}
+		}
+		if p.s[i] == '\n' {
+			p.line++
+		}
+		i++
+	}
+	p.offset += i
+	p.s = p.s[i:len(p.s)]
+	if len(p.s) == 0 {
+		p.done = true
+	}
+}
+
+func (p *textParser) advance() {
+	// Skip whitespace
+	p.skipWhitespace()
+	if p.done {
+		return
+	}
+
+	// Start of non-whitespace
+	p.cur.err = nil
+	p.cur.offset, p.cur.line = p.offset, p.line
+	p.cur.unquoted = ""
+	switch p.s[0] {
+	case '<', '>', '{', '}', ':', '[', ']', ';', ',', '/':
+		// Single symbol
+		p.cur.value, p.s = p.s[0:1], p.s[1:len(p.s)]
+	case '"', '\'':
+		// Quoted string
+		i := 1
+		for i < len(p.s) && p.s[i] != p.s[0] && p.s[i] != '\n' {
+			if p.s[i] == '\\' && i+1 < len(p.s) {
+				// skip escaped char
+				i++
+			}
+			i++
+		}
+		if i >= len(p.s) || p.s[i] != p.s[0] {
+			p.errorf("unmatched quote")
+			return
+		}
+		unq, err := unquoteC(p.s[1:i], rune(p.s[0]))
+		if err != nil {
+			p.errorf("invalid quoted string %s: %v", p.s[0:i+1], err)
+			return
+		}
+		p.cur.value, p.s = p.s[0:i+1], p.s[i+1:len(p.s)]
+		p.cur.unquoted = unq
+	default:
+		i := 0
+		for i < len(p.s) && isIdentOrNumberChar(p.s[i]) {
+			i++
+		}
+		if i == 0 {
+			p.errorf("unexpected byte %#x", p.s[0])
+			return
+		}
+		p.cur.value, p.s = p.s[0:i], p.s[i:len(p.s)]
+	}
+	p.offset += len(p.cur.value)
+}
+
+// Back off the parser by one token. Can only be done between calls to next().
+// It makes the next advance() a no-op.
+func (p *textParser) back() { p.backed = true }
+
+// Advances the parser and returns the new current token.
+func (p *textParser) next() *token {
+	if p.backed || p.done {
+		p.backed = false
+		return &p.cur
+	}
+	p.advance()
+	if p.done {
+		p.cur.value = ""
+	} else if len(p.cur.value) > 0 && isQuote(p.cur.value[0]) {
+		// Look for multiple quoted strings separated by whitespace,
+		// and concatenate them.
+		cat := p.cur
+		for {
+			p.skipWhitespace()
+			if p.done || !isQuote(p.s[0]) {
+				break
+			}
+			p.advance()
+			if p.cur.err != nil {
+				return &p.cur
+			}
+			cat.value += " " + p.cur.value
+			cat.unquoted += p.cur.unquoted
+		}
+		p.done = false // parser may have seen EOF, but we want to return cat
+		p.cur = cat
+	}
+	return &p.cur
+}
+
+func (p *textParser) consumeToken(s string) error {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != s {
+		p.back()
+		return p.errorf("expected %q, found %q", s, tok.value)
+	}
+	return nil
+}
+
+var errBadUTF8 = errors.New("proto: bad UTF-8")
+
+func unquoteC(s string, quote rune) (string, error) {
+	// This is based on C++'s tokenizer.cc.
+	// Despite its name, this is *not* parsing C syntax.
+	// For instance, "\0" is an invalid quoted string.
+
+	// Avoid allocation in trivial cases.
+	simple := true
+	for _, r := range s {
+		if r == '\\' || r == quote {
+			simple = false
+			break
+		}
+	}
+	if simple {
+		return s, nil
+	}
+
+	buf := make([]byte, 0, 3*len(s)/2)
+	for len(s) > 0 {
+		r, n := utf8.DecodeRuneInString(s)
+		if r == utf8.RuneError && n == 1 {
+			return "", errBadUTF8
+		}
+		s = s[n:]
+		if r != '\\' {
+			if r < utf8.RuneSelf {
+				buf = append(buf, byte(r))
+			} else {
+				buf = append(buf, string(r)...)
+			}
+			continue
+		}
+
+		ch, tail, err := unescape(s)
+		if err != nil {
+			return "", err
+		}
+		buf = append(buf, ch...)
+		s = tail
+	}
+	return string(buf), nil
+}
+
+func unescape(s string) (ch string, tail string, err error) {
+	r, n := utf8.DecodeRuneInString(s)
+	if r == utf8.RuneError && n == 1 {
+		return "", "", errBadUTF8
+	}
+	s = s[n:]
+	switch r {
+	case 'a':
+		return "\a", s, nil
+	case 'b':
+		return "\b", s, nil
+	case 'f':
+		return "\f", s, nil
+	case 'n':
+		return "\n", s, nil
+	case 'r':
+		return "\r", s, nil
+	case 't':
+		return "\t", s, nil
+	case 'v':
+		return "\v", s, nil
+	case '?':
+		return "?", s, nil // trigraph workaround
+	case '\'', '"', '\\':
+		return string(r), s, nil
+	case '0', '1', '2', '3', '4', '5', '6', '7':
+		if len(s) < 2 {
+			return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
+		}
+		ss := string(r) + s[:2]
+		s = s[2:]
+		i, err := strconv.ParseUint(ss, 8, 8)
+		if err != nil {
+			return "", "", fmt.Errorf(`\%s contains non-octal digits`, ss)
+		}
+		return string([]byte{byte(i)}), s, nil
+	case 'x', 'X', 'u', 'U':
+		var n int
+		switch r {
+		case 'x', 'X':
+			n = 2
+		case 'u':
+			n = 4
+		case 'U':
+			n = 8
+		}
+		if len(s) < n {
+			return "", "", fmt.Errorf(`\%c requires %d following digits`, r, n)
+		}
+		ss := s[:n]
+		s = s[n:]
+		i, err := strconv.ParseUint(ss, 16, 64)
+		if err != nil {
+			return "", "", fmt.Errorf(`\%c%s contains non-hexadecimal digits`, r, ss)
+		}
+		if r == 'x' || r == 'X' {
+			return string([]byte{byte(i)}), s, nil
+		}
+		if i > utf8.MaxRune {
+			return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
+		}
+		return string(i), s, nil
+	}
+	return "", "", fmt.Errorf(`unknown escape \%c`, r)
+}
+
+func isIdentOrNumberChar(c byte) bool {
+	switch {
+	case 'A' <= c && c <= 'Z', 'a' <= c && c <= 'z':
+		return true
+	case '0' <= c && c <= '9':
+		return true
+	}
+	switch c {
+	case '-', '+', '.', '_':
+		return true
+	}
+	return false
+}
+
+func isWhitespace(c byte) bool {
+	switch c {
+	case ' ', '\t', '\n', '\r':
+		return true
+	}
+	return false
+}
+
+func isQuote(c byte) bool {
+	switch c {
+	case '"', '\'':
+		return true
+	}
+	return false
+}

vendor/github.com/golang/protobuf/proto/text_encode.go

@@ -0,0 +1,560 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"bytes"
+	"encoding"
+	"fmt"
+	"io"
+	"math"
+	"sort"
+	"strings"
+
+	"google.golang.org/protobuf/encoding/prototext"
+	"google.golang.org/protobuf/encoding/protowire"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+const wrapTextMarshalV2 = false
+
+// TextMarshaler is a configurable text format marshaler.
+type TextMarshaler struct {
+	Compact   bool // use compact text format (one line)
+	ExpandAny bool // expand google.protobuf.Any messages of known types
+}
+
+// Marshal writes the proto text format of m to w.
+func (tm *TextMarshaler) Marshal(w io.Writer, m Message) error {
+	b, err := tm.marshal(m)
+	if len(b) > 0 {
+		if _, err := w.Write(b); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// Text returns a proto text formatted string of m.
+func (tm *TextMarshaler) Text(m Message) string {
+	b, _ := tm.marshal(m)
+	return string(b)
+}
+
+func (tm *TextMarshaler) marshal(m Message) ([]byte, error) {
+	mr := MessageReflect(m)
+	if mr == nil || !mr.IsValid() {
+		return []byte("<nil>"), nil
+	}
+
+	if wrapTextMarshalV2 {
+		if m, ok := m.(encoding.TextMarshaler); ok {
+			return m.MarshalText()
+		}
+
+		opts := prototext.MarshalOptions{
+			AllowPartial: true,
+			EmitUnknown:  true,
+		}
+		if !tm.Compact {
+			opts.Indent = "  "
+		}
+		if !tm.ExpandAny {
+			opts.Resolver = (*protoregistry.Types)(nil)
+		}
+		return opts.Marshal(mr.Interface())
+	} else {
+		w := &textWriter{
+			compact:   tm.Compact,
+			expandAny: tm.ExpandAny,
+			complete:  true,
+		}
+
+		if m, ok := m.(encoding.TextMarshaler); ok {
+			b, err := m.MarshalText()
+			if err != nil {
+				return nil, err
+			}
+			w.Write(b)
+			return w.buf, nil
+		}
+
+		err := w.writeMessage(mr)
+		return w.buf, err
+	}
+}
+
+var (
+	defaultTextMarshaler = TextMarshaler{}
+	compactTextMarshaler = TextMarshaler{Compact: true}
+)
+
+// MarshalText writes the proto text format of m to w.
+func MarshalText(w io.Writer, m Message) error { return defaultTextMarshaler.Marshal(w, m) }
+
+// MarshalTextString returns a proto text formatted string of m.
+func MarshalTextString(m Message) string { return defaultTextMarshaler.Text(m) }
+
+// CompactText writes the compact proto text format of m to w.
+func CompactText(w io.Writer, m Message) error { return compactTextMarshaler.Marshal(w, m) }
+
+// CompactTextString returns a compact proto text formatted string of m.
+func CompactTextString(m Message) string { return compactTextMarshaler.Text(m) }
+
+var (
+	newline         = []byte("\n")
+	endBraceNewline = []byte("}\n")
+	posInf          = []byte("inf")
+	negInf          = []byte("-inf")
+	nan             = []byte("nan")
+)
+
+// textWriter is an io.Writer that tracks its indentation level.
+type textWriter struct {
+	compact   bool // same as TextMarshaler.Compact
+	expandAny bool // same as TextMarshaler.ExpandAny
+	complete  bool // whether the current position is a complete line
+	indent    int  // indentation level; never negative
+	buf       []byte
+}
+
+func (w *textWriter) Write(p []byte) (n int, _ error) {
+	newlines := bytes.Count(p, newline)
+	if newlines == 0 {
+		if !w.compact && w.complete {
+			w.writeIndent()
+		}
+		w.buf = append(w.buf, p...)
+		w.complete = false
+		return len(p), nil
+	}
+
+	frags := bytes.SplitN(p, newline, newlines+1)
+	if w.compact {
+		for i, frag := range frags {
+			if i > 0 {
+				w.buf = append(w.buf, ' ')
+				n++
+			}
+			w.buf = append(w.buf, frag...)
+			n += len(frag)
+		}
+		return n, nil
+	}
+
+	for i, frag := range frags {
+		if w.complete {
+			w.writeIndent()
+		}
+		w.buf = append(w.buf, frag...)
+		n += len(frag)
+		if i+1 < len(frags) {
+			w.buf = append(w.buf, '\n')
+			n++
+		}
+	}
+	w.complete = len(frags[len(frags)-1]) == 0
+	return n, nil
+}
+
+func (w *textWriter) WriteByte(c byte) error {
+	if w.compact && c == '\n' {
+		c = ' '
+	}
+	if !w.compact && w.complete {
+		w.writeIndent()
+	}
+	w.buf = append(w.buf, c)
+	w.complete = c == '\n'
+	return nil
+}
+
+func (w *textWriter) writeName(fd protoreflect.FieldDescriptor) {
+	if !w.compact && w.complete {
+		w.writeIndent()
+	}
+	w.complete = false
+
+	if fd.Kind() != protoreflect.GroupKind {
+		w.buf = append(w.buf, fd.Name()...)
+		w.WriteByte(':')
+	} else {
+		// Use message type name for group field name.
+		w.buf = append(w.buf, fd.Message().Name()...)
+	}
+
+	if !w.compact {
+		w.WriteByte(' ')
+	}
+}
+
+func requiresQuotes(u string) bool {
+	// When type URL contains any characters except [0-9A-Za-z./\-]*, it must be quoted.
+	for _, ch := range u {
+		switch {
+		case ch == '.' || ch == '/' || ch == '_':
+			continue
+		case '0' <= ch && ch <= '9':
+			continue
+		case 'A' <= ch && ch <= 'Z':
+			continue
+		case 'a' <= ch && ch <= 'z':
+			continue
+		default:
+			return true
+		}
+	}
+	return false
+}
+
+// writeProto3Any writes an expanded google.protobuf.Any message.
+//
+// It returns (false, nil) if sv value can't be unmarshaled (e.g. because
+// required messages are not linked in).
+//
+// It returns (true, error) when sv was written in expanded format or an error
+// was encountered.
+func (w *textWriter) writeProto3Any(m protoreflect.Message) (bool, error) {
+	md := m.Descriptor()
+	fdURL := md.Fields().ByName("type_url")
+	fdVal := md.Fields().ByName("value")
+
+	url := m.Get(fdURL).String()
+	mt, err := protoregistry.GlobalTypes.FindMessageByURL(url)
+	if err != nil {
+		return false, nil
+	}
+
+	b := m.Get(fdVal).Bytes()
+	m2 := mt.New()
+	if err := proto.Unmarshal(b, m2.Interface()); err != nil {
+		return false, nil
+	}
+	w.Write([]byte("["))
+	if requiresQuotes(url) {
+		w.writeQuotedString(url)
+	} else {
+		w.Write([]byte(url))
+	}
+	if w.compact {
+		w.Write([]byte("]:<"))
+	} else {
+		w.Write([]byte("]: <\n"))
+		w.indent++
+	}
+	if err := w.writeMessage(m2); err != nil {
+		return true, err
+	}
+	if w.compact {
+		w.Write([]byte("> "))
+	} else {
+		w.indent--
+		w.Write([]byte(">\n"))
+	}
+	return true, nil
+}
+
+func (w *textWriter) writeMessage(m protoreflect.Message) error {
+	md := m.Descriptor()
+	if w.expandAny && md.FullName() == "google.protobuf.Any" {
+		if canExpand, err := w.writeProto3Any(m); canExpand {
+			return err
+		}
+	}
+
+	fds := md.Fields()
+	for i := 0; i < fds.Len(); {
+		fd := fds.Get(i)
+		if od := fd.ContainingOneof(); od != nil {
+			fd = m.WhichOneof(od)
+			i += od.Fields().Len()
+		} else {
+			i++
+		}
+		if fd == nil || !m.Has(fd) {
+			continue
+		}
+
+		switch {
+		case fd.IsList():
+			lv := m.Get(fd).List()
+			for j := 0; j < lv.Len(); j++ {
+				w.writeName(fd)
+				v := lv.Get(j)
+				if err := w.writeSingularValue(v, fd); err != nil {
+					return err
+				}
+				w.WriteByte('\n')
+			}
+		case fd.IsMap():
+			kfd := fd.MapKey()
+			vfd := fd.MapValue()
+			mv := m.Get(fd).Map()
+
+			type entry struct{ key, val protoreflect.Value }
+			var entries []entry
+			mv.Range(func(k protoreflect.MapKey, v protoreflect.Value) bool {
+				entries = append(entries, entry{k.Value(), v})
+				return true
+			})
+			sort.Slice(entries, func(i, j int) bool {
+				switch kfd.Kind() {
+				case protoreflect.BoolKind:
+					return !entries[i].key.Bool() && entries[j].key.Bool()
+				case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind, protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
+					return entries[i].key.Int() < entries[j].key.Int()
+				case protoreflect.Uint32Kind, protoreflect.Fixed32Kind, protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
+					return entries[i].key.Uint() < entries[j].key.Uint()
+				case protoreflect.StringKind:
+					return entries[i].key.String() < entries[j].key.String()
+				default:
+					panic("invalid kind")
+				}
+			})
+			for _, entry := range entries {
+				w.writeName(fd)
+				w.WriteByte('<')
+				if !w.compact {
+					w.WriteByte('\n')
+				}
+				w.indent++
+				w.writeName(kfd)
+				if err := w.writeSingularValue(entry.key, kfd); err != nil {
+					return err
+				}
+				w.WriteByte('\n')
+				w.writeName(vfd)
+				if err := w.writeSingularValue(entry.val, vfd); err != nil {
+					return err
+				}
+				w.WriteByte('\n')
+				w.indent--
+				w.WriteByte('>')
+				w.WriteByte('\n')
+			}
+		default:
+			w.writeName(fd)
+			if err := w.writeSingularValue(m.Get(fd), fd); err != nil {
+				return err
+			}
+			w.WriteByte('\n')
+		}
+	}
+
+	if b := m.GetUnknown(); len(b) > 0 {
+		w.writeUnknownFields(b)
+	}
+	return w.writeExtensions(m)
+}
+
+func (w *textWriter) writeSingularValue(v protoreflect.Value, fd protoreflect.FieldDescriptor) error {
+	switch fd.Kind() {
+	case protoreflect.FloatKind, protoreflect.DoubleKind:
+		switch vf := v.Float(); {
+		case math.IsInf(vf, +1):
+			w.Write(posInf)
+		case math.IsInf(vf, -1):
+			w.Write(negInf)
+		case math.IsNaN(vf):
+			w.Write(nan)
+		default:
+			fmt.Fprint(w, v.Interface())
+		}
+	case protoreflect.StringKind:
+		// NOTE: This does not validate UTF-8 for historical reasons.
+		w.writeQuotedString(string(v.String()))
+	case protoreflect.BytesKind:
+		w.writeQuotedString(string(v.Bytes()))
+	case protoreflect.MessageKind, protoreflect.GroupKind:
+		var bra, ket byte = '<', '>'
+		if fd.Kind() == protoreflect.GroupKind {
+			bra, ket = '{', '}'
+		}
+		w.WriteByte(bra)
+		if !w.compact {
+			w.WriteByte('\n')
+		}
+		w.indent++
+		m := v.Message()
+		if m2, ok := m.Interface().(encoding.TextMarshaler); ok {
+			b, err := m2.MarshalText()
+			if err != nil {
+				return err
+			}
+			w.Write(b)
+		} else {
+			w.writeMessage(m)
+		}
+		w.indent--
+		w.WriteByte(ket)
+	case protoreflect.EnumKind:
+		if ev := fd.Enum().Values().ByNumber(v.Enum()); ev != nil {
+			fmt.Fprint(w, ev.Name())
+		} else {
+			fmt.Fprint(w, v.Enum())
+		}
+	default:
+		fmt.Fprint(w, v.Interface())
+	}
+	return nil
+}
+
+// writeQuotedString writes a quoted string in the protocol buffer text format.
+func (w *textWriter) writeQuotedString(s string) {
+	w.WriteByte('"')
+	for i := 0; i < len(s); i++ {
+		switch c := s[i]; c {
+		case '\n':
+			w.buf = append(w.buf, `\n`...)
+		case '\r':
+			w.buf = append(w.buf, `\r`...)
+		case '\t':
+			w.buf = append(w.buf, `\t`...)
+		case '"':
+			w.buf = append(w.buf, `\"`...)
+		case '\\':
+			w.buf = append(w.buf, `\\`...)
+		default:
+			if isPrint := c >= 0x20 && c < 0x7f; isPrint {
+				w.buf = append(w.buf, c)
+			} else {
+				w.buf = append(w.buf, fmt.Sprintf(`\%03o`, c)...)
+			}
+		}
+	}
+	w.WriteByte('"')
+}
+
+func (w *textWriter) writeUnknownFields(b []byte) {
+	if !w.compact {
+		fmt.Fprintf(w, "/* %d unknown bytes */\n", len(b))
+	}
+
+	for len(b) > 0 {
+		num, wtyp, n := protowire.ConsumeTag(b)
+		if n < 0 {
+			return
+		}
+		b = b[n:]
+
+		if wtyp == protowire.EndGroupType {
+			w.indent--
+			w.Write(endBraceNewline)
+			continue
+		}
+		fmt.Fprint(w, num)
+		if wtyp != protowire.StartGroupType {
+			w.WriteByte(':')
+		}
+		if !w.compact || wtyp == protowire.StartGroupType {
+			w.WriteByte(' ')
+		}
+		switch wtyp {
+		case protowire.VarintType:
+			v, n := protowire.ConsumeVarint(b)
+			if n < 0 {
+				return
+			}
+			b = b[n:]
+			fmt.Fprint(w, v)
+		case protowire.Fixed32Type:
+			v, n := protowire.ConsumeFixed32(b)
+			if n < 0 {
+				return
+			}
+			b = b[n:]
+			fmt.Fprint(w, v)
+		case protowire.Fixed64Type:
+			v, n := protowire.ConsumeFixed64(b)
+			if n < 0 {
+				return
+			}
+			b = b[n:]
+			fmt.Fprint(w, v)
+		case protowire.BytesType:
+			v, n := protowire.ConsumeBytes(b)
+			if n < 0 {
+				return
+			}
+			b = b[n:]
+			fmt.Fprintf(w, "%q", v)
+		case protowire.StartGroupType:
+			w.WriteByte('{')
+			w.indent++
+		default:
+			fmt.Fprintf(w, "/* unknown wire type %d */", wtyp)
+		}
+		w.WriteByte('\n')
+	}
+}
+
+// writeExtensions writes all the extensions in m.
+func (w *textWriter) writeExtensions(m protoreflect.Message) error {
+	md := m.Descriptor()
+	if md.ExtensionRanges().Len() == 0 {
+		return nil
+	}
+
+	type ext struct {
+		desc protoreflect.FieldDescriptor
+		val  protoreflect.Value
+	}
+	var exts []ext
+	m.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
+		if fd.IsExtension() {
+			exts = append(exts, ext{fd, v})
+		}
+		return true
+	})
+	sort.Slice(exts, func(i, j int) bool {
+		return exts[i].desc.Number() < exts[j].desc.Number()
+	})
+
+	for _, ext := range exts {
+		// For message set, use the name of the message as the extension name.
+		name := string(ext.desc.FullName())
+		if isMessageSet(ext.desc.ContainingMessage()) {
+			name = strings.TrimSuffix(name, ".message_set_extension")
+		}
+
+		if !ext.desc.IsList() {
+			if err := w.writeSingularExtension(name, ext.val, ext.desc); err != nil {
+				return err
+			}
+		} else {
+			lv := ext.val.List()
+			for i := 0; i < lv.Len(); i++ {
+				if err := w.writeSingularExtension(name, lv.Get(i), ext.desc); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func (w *textWriter) writeSingularExtension(name string, v protoreflect.Value, fd protoreflect.FieldDescriptor) error {
+	fmt.Fprintf(w, "[%s]:", name)
+	if !w.compact {
+		w.WriteByte(' ')
+	}
+	if err := w.writeSingularValue(v, fd); err != nil {
+		return err
+	}
+	w.WriteByte('\n')
+	return nil
+}
+
+func (w *textWriter) writeIndent() {
+	if !w.complete {
+		return
+	}
+	for i := 0; i < w.indent*2; i++ {
+		w.buf = append(w.buf, ' ')
+	}
+	w.complete = false
+}

vendor/github.com/golang/protobuf/proto/wire.go

@@ -0,0 +1,78 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	protoV2 "google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/runtime/protoiface"
+)
+
+// Size returns the size in bytes of the wire-format encoding of m.
+func Size(m Message) int {
+	if m == nil {
+		return 0
+	}
+	mi := MessageV2(m)
+	return protoV2.Size(mi)
+}
+
+// Marshal returns the wire-format encoding of m.
+func Marshal(m Message) ([]byte, error) {
+	b, err := marshalAppend(nil, m, false)
+	if b == nil {
+		b = zeroBytes
+	}
+	return b, err
+}
+
+var zeroBytes = make([]byte, 0, 0)
+
+func marshalAppend(buf []byte, m Message, deterministic bool) ([]byte, error) {
+	if m == nil {
+		return nil, ErrNil
+	}
+	mi := MessageV2(m)
+	nbuf, err := protoV2.MarshalOptions{
+		Deterministic: deterministic,
+		AllowPartial:  true,
+	}.MarshalAppend(buf, mi)
+	if err != nil {
+		return buf, err
+	}
+	if len(buf) == len(nbuf) {
+		if !mi.ProtoReflect().IsValid() {
+			return buf, ErrNil
+		}
+	}
+	return nbuf, checkRequiredNotSet(mi)
+}
+
+// Unmarshal parses a wire-format message in b and places the decoded results in m.
+//
+// Unmarshal resets m before starting to unmarshal, so any existing data in m is always
+// removed. Use UnmarshalMerge to preserve and append to existing data.
+func Unmarshal(b []byte, m Message) error {
+	m.Reset()
+	return UnmarshalMerge(b, m)
+}
+
+// UnmarshalMerge parses a wire-format message in b and places the decoded results in m.
+func UnmarshalMerge(b []byte, m Message) error {
+	mi := MessageV2(m)
+	out, err := protoV2.UnmarshalOptions{
+		AllowPartial: true,
+		Merge:        true,
+	}.UnmarshalState(protoiface.UnmarshalInput{
+		Buf:     b,
+		Message: mi.ProtoReflect(),
+	})
+	if err != nil {
+		return err
+	}
+	if out.Flags&protoiface.UnmarshalInitialized > 0 {
+		return nil
+	}
+	return checkRequiredNotSet(mi)
+}

vendor/github.com/golang/protobuf/proto/wrappers.go

@@ -0,0 +1,34 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+// Bool stores v in a new bool value and returns a pointer to it.
+func Bool(v bool) *bool { return &v }
+
+// Int stores v in a new int32 value and returns a pointer to it.
+//
+// Deprecated: Use Int32 instead.
+func Int(v int) *int32 { return Int32(int32(v)) }
+
+// Int32 stores v in a new int32 value and returns a pointer to it.
+func Int32(v int32) *int32 { return &v }
+
+// Int64 stores v in a new int64 value and returns a pointer to it.
+func Int64(v int64) *int64 { return &v }
+
+// Uint32 stores v in a new uint32 value and returns a pointer to it.
+func Uint32(v uint32) *uint32 { return &v }
+
+// Uint64 stores v in a new uint64 value and returns a pointer to it.
+func Uint64(v uint64) *uint64 { return &v }
+
+// Float32 stores v in a new float32 value and returns a pointer to it.
+func Float32(v float32) *float32 { return &v }
+
+// Float64 stores v in a new float64 value and returns a pointer to it.
+func Float64(v float64) *float64 { return &v }
+
+// String stores v in a new string value and returns a pointer to it.
+func String(v string) *string { return &v }

vendor/github.com/golang/protobuf/ptypes/timestamp/timestamp.pb.go

@@ -0,0 +1,64 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/golang/protobuf/ptypes/timestamp/timestamp.proto
+
+package timestamp
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
+	reflect "reflect"
+)
+
+// Symbols defined in public import of google/protobuf/timestamp.proto.
+
+type Timestamp = timestamppb.Timestamp
+
+var File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto protoreflect.FileDescriptor
+
+var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc = []byte{
+	0x0a, 0x3b, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
+	0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79,
+	0x70, 0x65, 0x73, 0x2f, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2f, 0x74, 0x69,
+	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1f, 0x67,
+	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x74,
+	0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x42, 0x37,
+	0x5a, 0x35, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
+	0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79,
+	0x70, 0x65, 0x73, 0x2f, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x3b, 0x74, 0x69,
+	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x50, 0x00, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
+}
+
+var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes = []interface{}{}
+var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_init() }
+func file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_init() {
+	if File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes,
+		DependencyIndexes: file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs,
+	}.Build()
+	File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto = out.File
+	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc = nil
+	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes = nil
+	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs = nil
+}

vendor/github.com/konsorten/go-windows-terminal-sequences/LICENSE

@@ -0,0 +1,9 @@
+(The MIT License)
+
+Copyright (c) 2017 marvin + konsorten GmbH (open-source@konsorten.de)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/konsorten/go-windows-terminal-sequences/README.md

@@ -0,0 +1,42 @@
+# Windows Terminal Sequences
+
+This library allow for enabling Windows terminal color support for Go.
+
+See [Console Virtual Terminal Sequences](https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences) for details.
+
+## Usage
+
+```go
+import (
+	"syscall"
+	
+	sequences "github.com/konsorten/go-windows-terminal-sequences"
+)
+
+func main() {
+	sequences.EnableVirtualTerminalProcessing(syscall.Stdout, true)
+}
+
+```
+
+## Authors
+
+The tool is sponsored by the [marvin + konsorten GmbH](http://www.konsorten.de).
+
+We thank all the authors who provided code to this library:
+
+* Felix Kollmann
+* Nicolas Perraut
+* @dirty49374
+
+## License
+
+(The MIT License)
+
+Copyright (c) 2018 marvin + konsorten GmbH (open-source@konsorten.de)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/konsorten/go-windows-terminal-sequences/go.mod

@@ -0,0 +1 @@
+module github.com/konsorten/go-windows-terminal-sequences

vendor/github.com/konsorten/go-windows-terminal-sequences/sequences.go

@@ -0,0 +1,35 @@
+// +build windows
+
+package sequences
+
+import (
+	"syscall"
+)
+
+var (
+	kernel32Dll    *syscall.LazyDLL  = syscall.NewLazyDLL("Kernel32.dll")
+	setConsoleMode *syscall.LazyProc = kernel32Dll.NewProc("SetConsoleMode")
+)
+
+func EnableVirtualTerminalProcessing(stream syscall.Handle, enable bool) error {
+	const ENABLE_VIRTUAL_TERMINAL_PROCESSING uint32 = 0x4
+
+	var mode uint32
+	err := syscall.GetConsoleMode(syscall.Stdout, &mode)
+	if err != nil {
+		return err
+	}
+
+	if enable {
+		mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING
+	} else {
+		mode &^= ENABLE_VIRTUAL_TERMINAL_PROCESSING
+	}
+
+	ret, _, err := setConsoleMode.Call(uintptr(stream), uintptr(mode))
+	if ret == 0 {
+		return err
+	}
+
+	return nil
+}

vendor/github.com/konsorten/go-windows-terminal-sequences/sequences_dummy.go

@@ -0,0 +1,11 @@
+// +build linux darwin
+
+package sequences
+
+import (
+	"fmt"
+)
+
+func EnableVirtualTerminalProcessing(stream uintptr, enable bool) error {
+	return fmt.Errorf("windows only package")
+}

vendor/github.com/sirupsen/logrus/.gitignore

@@ -0,0 +1,2 @@
+logrus
+vendor

vendor/github.com/sirupsen/logrus/.golangci.yml

@@ -0,0 +1,40 @@
+run:
+  # do not run on test files yet
+  tests: false
+
+# all available settings of specific linters
+linters-settings:
+  errcheck:
+    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
+    # default is false: such cases aren't reported by default.
+    check-type-assertions: false
+
+    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
+    # default is false: such cases aren't reported by default.
+    check-blank: false
+
+  lll:
+    line-length: 100
+    tab-width: 4
+
+  prealloc:
+    simple: false
+    range-loops: false
+    for-loops: false
+
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+
+linters:
+  enable:
+    - megacheck
+    - govet
+  disable:
+    - maligned
+    - prealloc
+  disable-all: false
+  presets:
+    - bugs
+    - unused
+  fast: false

vendor/github.com/sirupsen/logrus/.travis.yml

@@ -0,0 +1,17 @@
+language: go
+go_import_path: github.com/sirupsen/logrus
+git:
+  depth: 1
+env:
+  - GO111MODULE=on
+go: [1.13.x, 1.14.x]
+os: [linux, osx]
+install:
+  - ./travis/install.sh
+script:
+  - ./travis/cross_build.sh
+  - ./travis/lint.sh
+  - export GOMAXPROCS=4
+  - export GORACE=halt_on_error=1
+  - go test -race -v ./...
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then go test -race -v -tags appengine ./... ; fi

vendor/github.com/sirupsen/logrus/CHANGELOG.md

@@ -0,0 +1,223 @@
+# 1.6.0
+Fixes:
+  * end of line cleanup
+  * revert the entry concurrency bug fix whic leads to deadlock under some circumstances
+  * update dependency on go-windows-terminal-sequences to fix a crash with go 1.14
+
+Features:
+  * add an option to the `TextFormatter` to completely disable fields quoting
+
+# 1.5.0
+Code quality:
+  * add golangci linter run on travis
+
+Fixes:
+  * add mutex for hooks concurrent access on `Entry` data
+  * caller function field for go1.14
+  * fix build issue for gopherjs target
+
+Feature:
+  * add an hooks/writer sub-package whose goal is to split output on different stream depending on the trace level
+  * add a `DisableHTMLEscape` option in the `JSONFormatter`
+  * add `ForceQuote` and `PadLevelText` options in the `TextFormatter`
+
+# 1.4.2
+  * Fixes build break for plan9, nacl, solaris
+# 1.4.1
+This new release introduces:
+  * Enhance TextFormatter to not print caller information when they are empty (#944)
+  * Remove dependency on golang.org/x/crypto (#932, #943)
+
+Fixes:
+  * Fix Entry.WithContext method to return a copy of the initial entry (#941)
+
+# 1.4.0
+This new release introduces:
+  * Add `DeferExitHandler`, similar to `RegisterExitHandler` but prepending the handler to the list of handlers (semantically like `defer`) (#848).
+  * Add `CallerPrettyfier` to `JSONFormatter` and `TextFormatter` (#909, #911)
+  * Add `Entry.WithContext()` and `Entry.Context`, to set a context on entries to be used e.g. in hooks (#919).
+
+Fixes:
+  * Fix wrong method calls `Logger.Print` and `Logger.Warningln` (#893).
+  * Update `Entry.Logf` to not do string formatting unless the log level is enabled (#903)
+  * Fix infinite recursion on unknown `Level.String()` (#907)
+  * Fix race condition in `getCaller` (#916).
+
+
+# 1.3.0
+This new release introduces:
+  * Log, Logf, Logln functions for Logger and Entry that take a Level
+
+Fixes:
+  * Building prometheus node_exporter on AIX (#840)
+  * Race condition in TextFormatter (#468)
+  * Travis CI import path (#868)
+  * Remove coloured output on Windows (#862)
+  * Pointer to func as field in JSONFormatter (#870)
+  * Properly marshal Levels (#873)
+
+# 1.2.0
+This new release introduces:
+  * A new method `SetReportCaller` in the `Logger` to enable the file, line and calling function from which the trace has been issued
+  * A new trace level named `Trace` whose level is below `Debug`
+  * A configurable exit function to be called upon a Fatal trace
+  * The `Level` object now implements `encoding.TextUnmarshaler` interface
+
+# 1.1.1
+This is a bug fix release.
+  * fix the build break on Solaris
+  * don't drop a whole trace in JSONFormatter when a field param is a function pointer which can not be serialized
+
+# 1.1.0
+This new release introduces:
+  * several fixes:
+    * a fix for a race condition on entry formatting
+    * proper cleanup of previously used entries before putting them back in the pool
+    * the extra new line at the end of message in text formatter has been removed
+  * a new global public API to check if a level is activated: IsLevelEnabled
+  * the following methods have been added to the Logger object
+    * IsLevelEnabled
+    * SetFormatter
+    * SetOutput
+    * ReplaceHooks
+  * introduction of go module
+  * an indent configuration for the json formatter
+  * output colour support for windows
+  * the field sort function is now configurable for text formatter
+  * the CLICOLOR and CLICOLOR\_FORCE environment variable support in text formater
+
+# 1.0.6
+
+This new release introduces:
+  * a new api WithTime which allows to easily force the time of the log entry
+    which is mostly useful for logger wrapper
+  * a fix reverting the immutability of the entry given as parameter to the hooks
+    a new configuration field of the json formatter in order to put all the fields
+    in a nested dictionnary
+  * a new SetOutput method in the Logger
+  * a new configuration of the textformatter to configure the name of the default keys
+  * a new configuration of the text formatter to disable the level truncation
+
+# 1.0.5
+
+* Fix hooks race (#707)
+* Fix panic deadlock (#695)
+
+# 1.0.4
+
+* Fix race when adding hooks (#612)
+* Fix terminal check in AppEngine (#635)
+
+# 1.0.3
+
+* Replace example files with testable examples
+
+# 1.0.2
+
+* bug: quote non-string values in text formatter (#583)
+* Make (*Logger) SetLevel a public method
+
+# 1.0.1
+
+* bug: fix escaping in text formatter (#575)
+
+# 1.0.0
+
+* Officially changed name to lower-case
+* bug: colors on Windows 10 (#541)
+* bug: fix race in accessing level (#512)
+
+# 0.11.5
+
+* feature: add writer and writerlevel to entry (#372)
+
+# 0.11.4
+
+* bug: fix undefined variable on solaris (#493)
+
+# 0.11.3
+
+* formatter: configure quoting of empty values (#484)
+* formatter: configure quoting character (default is `"`) (#484)
+* bug: fix not importing io correctly in non-linux environments (#481)
+
+# 0.11.2
+
+* bug: fix windows terminal detection (#476)
+
+# 0.11.1
+
+* bug: fix tty detection with custom out (#471)
+
+# 0.11.0
+
+* performance: Use bufferpool to allocate (#370)
+* terminal: terminal detection for app-engine (#343)
+* feature: exit handler (#375)
+
+# 0.10.0
+
+* feature: Add a test hook (#180)
+* feature: `ParseLevel` is now case-insensitive (#326)
+* feature: `FieldLogger` interface that generalizes `Logger` and `Entry` (#308)
+* performance: avoid re-allocations on `WithFields` (#335)
+
+# 0.9.0
+
+* logrus/text_formatter: don't emit empty msg
+* logrus/hooks/airbrake: move out of main repository
+* logrus/hooks/sentry: move out of main repository
+* logrus/hooks/papertrail: move out of main repository
+* logrus/hooks/bugsnag: move out of main repository
+* logrus/core: run tests with `-race`
+* logrus/core: detect TTY based on `stderr`
+* logrus/core: support `WithError` on logger
+* logrus/core: Solaris support
+
+# 0.8.7
+
+* logrus/core: fix possible race (#216)
+* logrus/doc: small typo fixes and doc improvements
+
+
+# 0.8.6
+
+* hooks/raven: allow passing an initialized client
+
+# 0.8.5
+
+* logrus/core: revert #208
+
+# 0.8.4
+
+* formatter/text: fix data race (#218)
+
+# 0.8.3
+
+* logrus/core: fix entry log level (#208)
+* logrus/core: improve performance of text formatter by 40%
+* logrus/core: expose `LevelHooks` type
+* logrus/core: add support for DragonflyBSD and NetBSD
+* formatter/text: print structs more verbosely
+
+# 0.8.2
+
+* logrus: fix more Fatal family functions
+
+# 0.8.1
+
+* logrus: fix not exiting on `Fatalf` and `Fatalln`
+
+# 0.8.0
+
+* logrus: defaults to stderr instead of stdout
+* hooks/sentry: add special field for `*http.Request`
+* formatter/text: ignore Windows for colors
+
+# 0.7.3
+
+* formatter/\*: allow configuration of timestamp layout
+
+# 0.7.2
+
+* formatter/text: Add configuration option for time format (#158)

vendor/github.com/sirupsen/logrus/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Simon Eskildsen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/sirupsen/logrus/README.md

@@ -0,0 +1,513 @@
+# Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/> [![Build Status](https://travis-ci.org/sirupsen/logrus.svg?branch=master)](https://travis-ci.org/sirupsen/logrus) [![GoDoc](https://godoc.org/github.com/sirupsen/logrus?status.svg)](https://godoc.org/github.com/sirupsen/logrus)
+
+Logrus is a structured logger for Go (golang), completely API compatible with
+the standard library logger.
+
+**Logrus is in maintenance-mode.** We will not be introducing new features. It's
+simply too hard to do in a way that won't break many people's projects, which is
+the last thing you want from your Logging library (again...).
+
+This does not mean Logrus is dead. Logrus will continue to be maintained for
+security, (backwards compatible) bug fixes, and performance (where we are
+limited by the interface). 
+
+I believe Logrus' biggest contribution is to have played a part in today's
+widespread use of structured logging in Golang. There doesn't seem to be a
+reason to do a major, breaking iteration into Logrus V2, since the fantastic Go
+community has built those independently. Many fantastic alternatives have sprung
+up. Logrus would look like those, had it been re-designed with what we know
+about structured logging in Go today. Check out, for example,
+[Zerolog][zerolog], [Zap][zap], and [Apex][apex].
+
+[zerolog]: https://github.com/rs/zerolog
+[zap]: https://github.com/uber-go/zap
+[apex]: https://github.com/apex/log
+
+**Seeing weird case-sensitive problems?** It's in the past been possible to
+import Logrus as both upper- and lower-case. Due to the Go package environment,
+this caused issues in the community and we needed a standard. Some environments
+experienced problems with the upper-case variant, so the lower-case was decided.
+Everything using `logrus` will need to use the lower-case:
+`github.com/sirupsen/logrus`. Any package that isn't, should be changed.
+
+To fix Glide, see [these
+comments](https://github.com/sirupsen/logrus/issues/553#issuecomment-306591437).
+For an in-depth explanation of the casing issue, see [this
+comment](https://github.com/sirupsen/logrus/issues/570#issuecomment-313933276).
+
+Nicely color-coded in development (when a TTY is attached, otherwise just
+plain text):
+
+![Colored](http://i.imgur.com/PY7qMwd.png)
+
+With `log.SetFormatter(&log.JSONFormatter{})`, for easy parsing by logstash
+or Splunk:
+
+```json
+{"animal":"walrus","level":"info","msg":"A group of walrus emerges from the
+ocean","size":10,"time":"2014-03-10 19:57:38.562264131 -0400 EDT"}
+
+{"level":"warning","msg":"The group's number increased tremendously!",
+"number":122,"omg":true,"time":"2014-03-10 19:57:38.562471297 -0400 EDT"}
+
+{"animal":"walrus","level":"info","msg":"A giant walrus appears!",
+"size":10,"time":"2014-03-10 19:57:38.562500591 -0400 EDT"}
+
+{"animal":"walrus","level":"info","msg":"Tremendously sized cow enters the ocean.",
+"size":9,"time":"2014-03-10 19:57:38.562527896 -0400 EDT"}
+
+{"level":"fatal","msg":"The ice breaks!","number":100,"omg":true,
+"time":"2014-03-10 19:57:38.562543128 -0400 EDT"}
+```
+
+With the default `log.SetFormatter(&log.TextFormatter{})` when a TTY is not
+attached, the output is compatible with the
+[logfmt](http://godoc.org/github.com/kr/logfmt) format:
+
+```text
+time="2015-03-26T01:27:38-04:00" level=debug msg="Started observing beach" animal=walrus number=8
+time="2015-03-26T01:27:38-04:00" level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10
+time="2015-03-26T01:27:38-04:00" level=warning msg="The group's number increased tremendously!" number=122 omg=true
+time="2015-03-26T01:27:38-04:00" level=debug msg="Temperature changes" temperature=-4
+time="2015-03-26T01:27:38-04:00" level=panic msg="It's over 9000!" animal=orca size=9009
+time="2015-03-26T01:27:38-04:00" level=fatal msg="The ice breaks!" err=&{0x2082280c0 map[animal:orca size:9009] 2015-03-26 01:27:38.441574009 -0400 EDT panic It's over 9000!} number=100 omg=true
+```
+To ensure this behaviour even if a TTY is attached, set your formatter as follows:
+
+```go
+	log.SetFormatter(&log.TextFormatter{
+		DisableColors: true,
+		FullTimestamp: true,
+	})
+```
+
+#### Logging Method Name
+
+If you wish to add the calling method as a field, instruct the logger via:
+```go
+log.SetReportCaller(true)
+```
+This adds the caller as 'method' like so:
+
+```json
+{"animal":"penguin","level":"fatal","method":"github.com/sirupsen/arcticcreatures.migrate","msg":"a penguin swims by",
+"time":"2014-03-10 19:57:38.562543129 -0400 EDT"}
+```
+
+```text
+time="2015-03-26T01:27:38-04:00" level=fatal method=github.com/sirupsen/arcticcreatures.migrate msg="a penguin swims by" animal=penguin
+```
+Note that this does add measurable overhead - the cost will depend on the version of Go, but is
+between 20 and 40% in recent tests with 1.6 and 1.7.  You can validate this in your
+environment via benchmarks: 
+```
+go test -bench=.*CallerTracing
+```
+
+
+#### Case-sensitivity
+
+The organization's name was changed to lower-case--and this will not be changed
+back. If you are getting import conflicts due to case sensitivity, please use
+the lower-case import: `github.com/sirupsen/logrus`.
+
+#### Example
+
+The simplest way to use Logrus is simply the package-level exported logger:
+
+```go
+package main
+
+import (
+  log "github.com/sirupsen/logrus"
+)
+
+func main() {
+  log.WithFields(log.Fields{
+    "animal": "walrus",
+  }).Info("A walrus appears")
+}
+```
+
+Note that it's completely api-compatible with the stdlib logger, so you can
+replace your `log` imports everywhere with `log "github.com/sirupsen/logrus"`
+and you'll now have the flexibility of Logrus. You can customize it all you
+want:
+
+```go
+package main
+
+import (
+  "os"
+  log "github.com/sirupsen/logrus"
+)
+
+func init() {
+  // Log as JSON instead of the default ASCII formatter.
+  log.SetFormatter(&log.JSONFormatter{})
+
+  // Output to stdout instead of the default stderr
+  // Can be any io.Writer, see below for File example
+  log.SetOutput(os.Stdout)
+
+  // Only log the warning severity or above.
+  log.SetLevel(log.WarnLevel)
+}
+
+func main() {
+  log.WithFields(log.Fields{
+    "animal": "walrus",
+    "size":   10,
+  }).Info("A group of walrus emerges from the ocean")
+
+  log.WithFields(log.Fields{
+    "omg":    true,
+    "number": 122,
+  }).Warn("The group's number increased tremendously!")
+
+  log.WithFields(log.Fields{
+    "omg":    true,
+    "number": 100,
+  }).Fatal("The ice breaks!")
+
+  // A common pattern is to re-use fields between logging statements by re-using
+  // the logrus.Entry returned from WithFields()
+  contextLogger := log.WithFields(log.Fields{
+    "common": "this is a common field",
+    "other": "I also should be logged always",
+  })
+
+  contextLogger.Info("I'll be logged with common and other field")
+  contextLogger.Info("Me too")
+}
+```
+
+For more advanced usage such as logging to multiple locations from the same
+application, you can also create an instance of the `logrus` Logger:
+
+```go
+package main
+
+import (
+  "os"
+  "github.com/sirupsen/logrus"
+)
+
+// Create a new instance of the logger. You can have any number of instances.
+var log = logrus.New()
+
+func main() {
+  // The API for setting attributes is a little different than the package level
+  // exported logger. See Godoc.
+  log.Out = os.Stdout
+
+  // You could set this to any `io.Writer` such as a file
+  // file, err := os.OpenFile("logrus.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+  // if err == nil {
+  //  log.Out = file
+  // } else {
+  //  log.Info("Failed to log to file, using default stderr")
+  // }
+
+  log.WithFields(logrus.Fields{
+    "animal": "walrus",
+    "size":   10,
+  }).Info("A group of walrus emerges from the ocean")
+}
+```
+
+#### Fields
+
+Logrus encourages careful, structured logging through logging fields instead of
+long, unparseable error messages. For example, instead of: `log.Fatalf("Failed
+to send event %s to topic %s with key %d")`, you should log the much more
+discoverable:
+
+```go
+log.WithFields(log.Fields{
+  "event": event,
+  "topic": topic,
+  "key": key,
+}).Fatal("Failed to send event")
+```
+
+We've found this API forces you to think about logging in a way that produces
+much more useful logging messages. We've been in countless situations where just
+a single added field to a log statement that was already there would've saved us
+hours. The `WithFields` call is optional.
+
+In general, with Logrus using any of the `printf`-family functions should be
+seen as a hint you should add a field, however, you can still use the
+`printf`-family functions with Logrus.
+
+#### Default Fields
+
+Often it's helpful to have fields _always_ attached to log statements in an
+application or parts of one. For example, you may want to always log the
+`request_id` and `user_ip` in the context of a request. Instead of writing
+`log.WithFields(log.Fields{"request_id": request_id, "user_ip": user_ip})` on
+every line, you can create a `logrus.Entry` to pass around instead:
+
+```go
+requestLogger := log.WithFields(log.Fields{"request_id": request_id, "user_ip": user_ip})
+requestLogger.Info("something happened on that request") # will log request_id and user_ip
+requestLogger.Warn("something not great happened")
+```
+
+#### Hooks
+
+You can add hooks for logging levels. For example to send errors to an exception
+tracking service on `Error`, `Fatal` and `Panic`, info to StatsD or log to
+multiple places simultaneously, e.g. syslog.
+
+Logrus comes with [built-in hooks](hooks/). Add those, or your custom hook, in
+`init`:
+
+```go
+import (
+  log "github.com/sirupsen/logrus"
+  "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "airbrake"
+  logrus_syslog "github.com/sirupsen/logrus/hooks/syslog"
+  "log/syslog"
+)
+
+func init() {
+
+  // Use the Airbrake hook to report errors that have Error severity or above to
+  // an exception tracker. You can create custom hooks, see the Hooks section.
+  log.AddHook(airbrake.NewHook(123, "xyz", "production"))
+
+  hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
+  if err != nil {
+    log.Error("Unable to connect to local syslog daemon")
+  } else {
+    log.AddHook(hook)
+  }
+}
+```
+Note: Syslog hook also support connecting to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). For the detail, please check the [syslog hook README](hooks/syslog/README.md).
+
+A list of currently known service hooks can be found in this wiki [page](https://github.com/sirupsen/logrus/wiki/Hooks)
+
+
+#### Level logging
+
+Logrus has seven logging levels: Trace, Debug, Info, Warning, Error, Fatal and Panic.
+
+```go
+log.Trace("Something very low level.")
+log.Debug("Useful debugging information.")
+log.Info("Something noteworthy happened!")
+log.Warn("You should probably take a look at this.")
+log.Error("Something failed but I'm not quitting.")
+// Calls os.Exit(1) after logging
+log.Fatal("Bye.")
+// Calls panic() after logging
+log.Panic("I'm bailing.")
+```
+
+You can set the logging level on a `Logger`, then it will only log entries with
+that severity or anything above it:
+
+```go
+// Will log anything that is info or above (warn, error, fatal, panic). Default.
+log.SetLevel(log.InfoLevel)
+```
+
+It may be useful to set `log.Level = logrus.DebugLevel` in a debug or verbose
+environment if your application has that.
+
+#### Entries
+
+Besides the fields added with `WithField` or `WithFields` some fields are
+automatically added to all logging events:
+
+1. `time`. The timestamp when the entry was created.
+2. `msg`. The logging message passed to `{Info,Warn,Error,Fatal,Panic}` after
+   the `AddFields` call. E.g. `Failed to send event.`
+3. `level`. The logging level. E.g. `info`.
+
+#### Environments
+
+Logrus has no notion of environment.
+
+If you wish for hooks and formatters to only be used in specific environments,
+you should handle that yourself. For example, if your application has a global
+variable `Environment`, which is a string representation of the environment you
+could do:
+
+```go
+import (
+  log "github.com/sirupsen/logrus"
+)
+
+init() {
+  // do something here to set environment depending on an environment variable
+  // or command-line flag
+  if Environment == "production" {
+    log.SetFormatter(&log.JSONFormatter{})
+  } else {
+    // The TextFormatter is default, you don't actually have to do this.
+    log.SetFormatter(&log.TextFormatter{})
+  }
+}
+```
+
+This configuration is how `logrus` was intended to be used, but JSON in
+production is mostly only useful if you do log aggregation with tools like
+Splunk or Logstash.
+
+#### Formatters
+
+The built-in logging formatters are:
+
+* `logrus.TextFormatter`. Logs the event in colors if stdout is a tty, otherwise
+  without colors.
+  * *Note:* to force colored output when there is no TTY, set the `ForceColors`
+    field to `true`.  To force no colored output even if there is a TTY  set the
+    `DisableColors` field to `true`. For Windows, see
+    [github.com/mattn/go-colorable](https://github.com/mattn/go-colorable).
+  * When colors are enabled, levels are truncated to 4 characters by default. To disable
+    truncation set the `DisableLevelTruncation` field to `true`.
+  * When outputting to a TTY, it's often helpful to visually scan down a column where all the levels are the same width. Setting the `PadLevelText` field to `true` enables this behavior, by adding padding to the level text.
+  * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#TextFormatter).
+* `logrus.JSONFormatter`. Logs fields as JSON.
+  * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#JSONFormatter).
+
+Third party logging formatters:
+
+* [`FluentdFormatter`](https://github.com/joonix/log). Formats entries that can be parsed by Kubernetes and Google Container Engine.
+* [`GELF`](https://github.com/fabienm/go-logrus-formatters). Formats entries so they comply to Graylog's [GELF 1.1 specification](http://docs.graylog.org/en/2.4/pages/gelf.html).
+* [`logstash`](https://github.com/bshuster-repo/logrus-logstash-hook). Logs fields as [Logstash](http://logstash.net) Events.
+* [`prefixed`](https://github.com/x-cray/logrus-prefixed-formatter). Displays log entry source along with alternative layout.
+* [`zalgo`](https://github.com/aybabtme/logzalgo). Invoking the Power of Zalgo.
+* [`nested-logrus-formatter`](https://github.com/antonfisher/nested-logrus-formatter). Converts logrus fields to a nested structure.
+* [`powerful-logrus-formatter`](https://github.com/zput/zxcTool). get fileName, log's line number and the latest function's name when print log; Sava log to files.
+* [`caption-json-formatter`](https://github.com/nolleh/caption_json_formatter). logrus's message json formatter with human-readable caption added.
+
+You can define your formatter by implementing the `Formatter` interface,
+requiring a `Format` method. `Format` takes an `*Entry`. `entry.Data` is a
+`Fields` type (`map[string]interface{}`) with all your fields as well as the
+default ones (see Entries section above):
+
+```go
+type MyJSONFormatter struct {
+}
+
+log.SetFormatter(new(MyJSONFormatter))
+
+func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
+  // Note this doesn't include Time, Level and Message which are available on
+  // the Entry. Consult `godoc` on information about those fields or read the
+  // source of the official loggers.
+  serialized, err := json.Marshal(entry.Data)
+    if err != nil {
+      return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
+    }
+  return append(serialized, '\n'), nil
+}
+```
+
+#### Logger as an `io.Writer`
+
+Logrus can be transformed into an `io.Writer`. That writer is the end of an `io.Pipe` and it is your responsibility to close it.
+
+```go
+w := logger.Writer()
+defer w.Close()
+
+srv := http.Server{
+    // create a stdlib log.Logger that writes to
+    // logrus.Logger.
+    ErrorLog: log.New(w, "", 0),
+}
+```
+
+Each line written to that writer will be printed the usual way, using formatters
+and hooks. The level for those entries is `info`.
+
+This means that we can override the standard library logger easily:
+
+```go
+logger := logrus.New()
+logger.Formatter = &logrus.JSONFormatter{}
+
+// Use logrus for standard log output
+// Note that `log` here references stdlib's log
+// Not logrus imported under the name `log`.
+log.SetOutput(logger.Writer())
+```
+
+#### Rotation
+
+Log rotation is not provided with Logrus. Log rotation should be done by an
+external program (like `logrotate(8)`) that can compress and delete old log
+entries. It should not be a feature of the application-level logger.
+
+#### Tools
+
+| Tool | Description |
+| ---- | ----------- |
+|[Logrus Mate](https://github.com/gogap/logrus_mate)|Logrus mate is a tool for Logrus to manage loggers, you can initial logger's level, hook and formatter by config file, the logger will be generated with different configs in different environments.|
+|[Logrus Viper Helper](https://github.com/heirko/go-contrib/tree/master/logrusHelper)|An Helper around Logrus to wrap with spf13/Viper to load configuration with fangs! And to simplify Logrus configuration use some behavior of [Logrus Mate](https://github.com/gogap/logrus_mate). [sample](https://github.com/heirko/iris-contrib/blob/master/middleware/logrus-logger/example) |
+
+#### Testing
+
+Logrus has a built in facility for asserting the presence of log messages. This is implemented through the `test` hook and provides:
+
+* decorators for existing logger (`test.NewLocal` and `test.NewGlobal`) which basically just adds the `test` hook
+* a test logger (`test.NewNullLogger`) that just records log messages (and does not output any):
+
+```go
+import(
+  "github.com/sirupsen/logrus"
+  "github.com/sirupsen/logrus/hooks/test"
+  "github.com/stretchr/testify/assert"
+  "testing"
+)
+
+func TestSomething(t*testing.T){
+  logger, hook := test.NewNullLogger()
+  logger.Error("Helloerror")
+
+  assert.Equal(t, 1, len(hook.Entries))
+  assert.Equal(t, logrus.ErrorLevel, hook.LastEntry().Level)
+  assert.Equal(t, "Helloerror", hook.LastEntry().Message)
+
+  hook.Reset()
+  assert.Nil(t, hook.LastEntry())
+}
+```
+
+#### Fatal handlers
+
+Logrus can register one or more functions that will be called when any `fatal`
+level message is logged. The registered handlers will be executed before
+logrus performs an `os.Exit(1)`. This behavior may be helpful if callers need
+to gracefully shutdown. Unlike a `panic("Something went wrong...")` call which can be intercepted with a deferred `recover` a call to `os.Exit(1)` can not be intercepted.
+
+```
+...
+handler := func() {
+  // gracefully shutdown something...
+}
+logrus.RegisterExitHandler(handler)
+...
+```
+
+#### Thread safety
+
+By default, Logger is protected by a mutex for concurrent writes. The mutex is held when calling hooks and writing logs.
+If you are sure such locking is not needed, you can call logger.SetNoLock() to disable the locking.
+
+Situation when locking is not needed includes:
+
+* You have no hooks registered, or hooks calling is already thread-safe.
+
+* Writing to logger.Out is already thread-safe, for example:
+
+  1) logger.Out is protected by locks.
+
+  2) logger.Out is an os.File handler opened with `O_APPEND` flag, and every write is smaller than 4k. (This allows multi-thread/multi-process writing)
+
+     (Refer to http://www.notthewizard.com/2014/06/17/are-files-appends-really-atomic/)

vendor/github.com/sirupsen/logrus/alt_exit.go

@@ -0,0 +1,76 @@
+package logrus
+
+// The following code was sourced and modified from the
+// https://github.com/tebeka/atexit package governed by the following license:
+//
+// Copyright (c) 2012 Miki Tebeka <miki.tebeka@gmail.com>.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import (
+	"fmt"
+	"os"
+)
+
+var handlers = []func(){}
+
+func runHandler(handler func()) {
+	defer func() {
+		if err := recover(); err != nil {
+			fmt.Fprintln(os.Stderr, "Error: Logrus exit handler error:", err)
+		}
+	}()
+
+	handler()
+}
+
+func runHandlers() {
+	for _, handler := range handlers {
+		runHandler(handler)
+	}
+}
+
+// Exit runs all the Logrus atexit handlers and then terminates the program using os.Exit(code)
+func Exit(code int) {
+	runHandlers()
+	os.Exit(code)
+}
+
+// RegisterExitHandler appends a Logrus Exit handler to the list of handlers,
+// call logrus.Exit to invoke all handlers. The handlers will also be invoked when
+// any Fatal log entry is made.
+//
+// This method is useful when a caller wishes to use logrus to log a fatal
+// message but also needs to gracefully shutdown. An example usecase could be
+// closing database connections, or sending a alert that the application is
+// closing.
+func RegisterExitHandler(handler func()) {
+	handlers = append(handlers, handler)
+}
+
+// DeferExitHandler prepends a Logrus Exit handler to the list of handlers,
+// call logrus.Exit to invoke all handlers. The handlers will also be invoked when
+// any Fatal log entry is made.
+//
+// This method is useful when a caller wishes to use logrus to log a fatal
+// message but also needs to gracefully shutdown. An example usecase could be
+// closing database connections, or sending a alert that the application is
+// closing.
+func DeferExitHandler(handler func()) {
+	handlers = append([]func(){handler}, handlers...)
+}

vendor/github.com/sirupsen/logrus/appveyor.yml

@@ -0,0 +1,14 @@
+version: "{build}"
+platform: x64
+clone_folder: c:\gopath\src\github.com\sirupsen\logrus
+environment:
+  GOPATH: c:\gopath
+branches:
+  only:
+    - master
+install:
+  - set PATH=%GOPATH%\bin;c:\go\bin;%PATH%
+  - go version
+build_script:
+  - go get -t
+  - go test

vendor/github.com/sirupsen/logrus/doc.go

@@ -0,0 +1,26 @@
+/*
+Package logrus is a structured logger for Go, completely API compatible with the standard library logger.
+
+
+The simplest way to use Logrus is simply the package-level exported logger:
+
+  package main
+
+  import (
+    log "github.com/sirupsen/logrus"
+  )
+
+  func main() {
+    log.WithFields(log.Fields{
+      "animal": "walrus",
+      "number": 1,
+      "size":   10,
+    }).Info("A walrus appears")
+  }
+
+Output:
+  time="2015-09-07T08:48:33Z" level=info msg="A walrus appears" animal=walrus number=1 size=10
+
+For a full guide visit https://github.com/sirupsen/logrus
+*/
+package logrus

vendor/github.com/sirupsen/logrus/entry.go

@@ -0,0 +1,426 @@
+package logrus
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os"
+	"reflect"
+	"runtime"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	bufferPool *sync.Pool
+
+	// qualified package name, cached at first use
+	logrusPackage string
+
+	// Positions in the call stack when tracing to report the calling method
+	minimumCallerDepth int
+
+	// Used for caller information initialisation
+	callerInitOnce sync.Once
+)
+
+const (
+	maximumCallerDepth int = 25
+	knownLogrusFrames  int = 4
+)
+
+func init() {
+	bufferPool = &sync.Pool{
+		New: func() interface{} {
+			return new(bytes.Buffer)
+		},
+	}
+
+	// start at the bottom of the stack before the package-name cache is primed
+	minimumCallerDepth = 1
+}
+
+// Defines the key when adding errors using WithError.
+var ErrorKey = "error"
+
+// An entry is the final or intermediate Logrus logging entry. It contains all
+// the fields passed with WithField{,s}. It's finally logged when Trace, Debug,
+// Info, Warn, Error, Fatal or Panic is called on it. These objects can be
+// reused and passed around as much as you wish to avoid field duplication.
+type Entry struct {
+	Logger *Logger
+
+	// Contains all the fields set by the user.
+	Data Fields
+
+	// Time at which the log entry was created
+	Time time.Time
+
+	// Level the log entry was logged at: Trace, Debug, Info, Warn, Error, Fatal or Panic
+	// This field will be set on entry firing and the value will be equal to the one in Logger struct field.
+	Level Level
+
+	// Calling method, with package name
+	Caller *runtime.Frame
+
+	// Message passed to Trace, Debug, Info, Warn, Error, Fatal or Panic
+	Message string
+
+	// When formatter is called in entry.log(), a Buffer may be set to entry
+	Buffer *bytes.Buffer
+
+	// Contains the context set by the user. Useful for hook processing etc.
+	Context context.Context
+
+	// err may contain a field formatting error
+	err string
+}
+
+func NewEntry(logger *Logger) *Entry {
+	return &Entry{
+		Logger: logger,
+		// Default is three fields, plus one optional.  Give a little extra room.
+		Data: make(Fields, 6),
+	}
+}
+
+// Returns the bytes representation of this entry from the formatter.
+func (entry *Entry) Bytes() ([]byte, error) {
+	return entry.Logger.Formatter.Format(entry)
+}
+
+// Returns the string representation from the reader and ultimately the
+// formatter.
+func (entry *Entry) String() (string, error) {
+	serialized, err := entry.Bytes()
+	if err != nil {
+		return "", err
+	}
+	str := string(serialized)
+	return str, nil
+}
+
+// Add an error as single field (using the key defined in ErrorKey) to the Entry.
+func (entry *Entry) WithError(err error) *Entry {
+	return entry.WithField(ErrorKey, err)
+}
+
+// Add a context to the Entry.
+func (entry *Entry) WithContext(ctx context.Context) *Entry {
+	dataCopy := make(Fields, len(entry.Data))
+	for k, v := range entry.Data {
+		dataCopy[k] = v
+	}
+	return &Entry{Logger: entry.Logger, Data: dataCopy, Time: entry.Time, err: entry.err, Context: ctx}
+}
+
+// Add a single field to the Entry.
+func (entry *Entry) WithField(key string, value interface{}) *Entry {
+	return entry.WithFields(Fields{key: value})
+}
+
+// Add a map of fields to the Entry.
+func (entry *Entry) WithFields(fields Fields) *Entry {
+	data := make(Fields, len(entry.Data)+len(fields))
+	for k, v := range entry.Data {
+		data[k] = v
+	}
+	fieldErr := entry.err
+	for k, v := range fields {
+		isErrField := false
+		if t := reflect.TypeOf(v); t != nil {
+			switch t.Kind() {
+			case reflect.Func:
+				isErrField = true
+			case reflect.Ptr:
+				isErrField = t.Elem().Kind() == reflect.Func
+			}
+		}
+		if isErrField {
+			tmp := fmt.Sprintf("can not add field %q", k)
+			if fieldErr != "" {
+				fieldErr = entry.err + ", " + tmp
+			} else {
+				fieldErr = tmp
+			}
+		} else {
+			data[k] = v
+		}
+	}
+	return &Entry{Logger: entry.Logger, Data: data, Time: entry.Time, err: fieldErr, Context: entry.Context}
+}
+
+// Overrides the time of the Entry.
+func (entry *Entry) WithTime(t time.Time) *Entry {
+	dataCopy := make(Fields, len(entry.Data))
+	for k, v := range entry.Data {
+		dataCopy[k] = v
+	}
+	return &Entry{Logger: entry.Logger, Data: dataCopy, Time: t, err: entry.err, Context: entry.Context}
+}
+
+// getPackageName reduces a fully qualified function name to the package name
+// There really ought to be to be a better way...
+func getPackageName(f string) string {
+	for {
+		lastPeriod := strings.LastIndex(f, ".")
+		lastSlash := strings.LastIndex(f, "/")
+		if lastPeriod > lastSlash {
+			f = f[:lastPeriod]
+		} else {
+			break
+		}
+	}
+
+	return f
+}
+
+// getCaller retrieves the name of the first non-logrus calling function
+func getCaller() *runtime.Frame {
+	// cache this package's fully-qualified name
+	callerInitOnce.Do(func() {
+		pcs := make([]uintptr, maximumCallerDepth)
+		_ = runtime.Callers(0, pcs)
+
+		// dynamic get the package name and the minimum caller depth
+		for i := 0; i < maximumCallerDepth; i++ {
+			funcName := runtime.FuncForPC(pcs[i]).Name()
+			if strings.Contains(funcName, "getCaller") {
+				logrusPackage = getPackageName(funcName)
+				break
+			}
+		}
+
+		minimumCallerDepth = knownLogrusFrames
+	})
+
+	// Restrict the lookback frames to avoid runaway lookups
+	pcs := make([]uintptr, maximumCallerDepth)
+	depth := runtime.Callers(minimumCallerDepth, pcs)
+	frames := runtime.CallersFrames(pcs[:depth])
+
+	for f, again := frames.Next(); again; f, again = frames.Next() {
+		pkg := getPackageName(f.Function)
+
+		// If the caller isn't part of this package, we're done
+		if pkg != logrusPackage {
+			return &f //nolint:scopelint
+		}
+	}
+
+	// if we got here, we failed to find the caller's context
+	return nil
+}
+
+func (entry Entry) HasCaller() (has bool) {
+	return entry.Logger != nil &&
+		entry.Logger.ReportCaller &&
+		entry.Caller != nil
+}
+
+// This function is not declared with a pointer value because otherwise
+// race conditions will occur when using multiple goroutines
+func (entry Entry) log(level Level, msg string) {
+	var buffer *bytes.Buffer
+
+	// Default to now, but allow users to override if they want.
+	//
+	// We don't have to worry about polluting future calls to Entry#log()
+	// with this assignment because this function is declared with a
+	// non-pointer receiver.
+	if entry.Time.IsZero() {
+		entry.Time = time.Now()
+	}
+
+	entry.Level = level
+	entry.Message = msg
+	entry.Logger.mu.Lock()
+	if entry.Logger.ReportCaller {
+		entry.Caller = getCaller()
+	}
+	entry.Logger.mu.Unlock()
+
+	entry.fireHooks()
+
+	buffer = bufferPool.Get().(*bytes.Buffer)
+	buffer.Reset()
+	defer bufferPool.Put(buffer)
+	entry.Buffer = buffer
+
+	entry.write()
+
+	entry.Buffer = nil
+
+	// To avoid Entry#log() returning a value that only would make sense for
+	// panic() to use in Entry#Panic(), we avoid the allocation by checking
+	// directly here.
+	if level <= PanicLevel {
+		panic(&entry)
+	}
+}
+
+func (entry *Entry) fireHooks() {
+	entry.Logger.mu.Lock()
+	defer entry.Logger.mu.Unlock()
+	err := entry.Logger.Hooks.Fire(entry.Level, entry)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
+	}
+}
+
+func (entry *Entry) write() {
+	entry.Logger.mu.Lock()
+	defer entry.Logger.mu.Unlock()
+	serialized, err := entry.Logger.Formatter.Format(entry)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to obtain reader, %v\n", err)
+		return
+	}
+	if _, err = entry.Logger.Out.Write(serialized); err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to write to log, %v\n", err)
+	}
+}
+
+func (entry *Entry) Log(level Level, args ...interface{}) {
+	if entry.Logger.IsLevelEnabled(level) {
+		entry.log(level, fmt.Sprint(args...))
+	}
+}
+
+func (entry *Entry) Trace(args ...interface{}) {
+	entry.Log(TraceLevel, args...)
+}
+
+func (entry *Entry) Debug(args ...interface{}) {
+	entry.Log(DebugLevel, args...)
+}
+
+func (entry *Entry) Print(args ...interface{}) {
+	entry.Info(args...)
+}
+
+func (entry *Entry) Info(args ...interface{}) {
+	entry.Log(InfoLevel, args...)
+}
+
+func (entry *Entry) Warn(args ...interface{}) {
+	entry.Log(WarnLevel, args...)
+}
+
+func (entry *Entry) Warning(args ...interface{}) {
+	entry.Warn(args...)
+}
+
+func (entry *Entry) Error(args ...interface{}) {
+	entry.Log(ErrorLevel, args...)
+}
+
+func (entry *Entry) Fatal(args ...interface{}) {
+	entry.Log(FatalLevel, args...)
+	entry.Logger.Exit(1)
+}
+
+func (entry *Entry) Panic(args ...interface{}) {
+	entry.Log(PanicLevel, args...)
+	panic(fmt.Sprint(args...))
+}
+
+// Entry Printf family functions
+
+func (entry *Entry) Logf(level Level, format string, args ...interface{}) {
+	if entry.Logger.IsLevelEnabled(level) {
+		entry.Log(level, fmt.Sprintf(format, args...))
+	}
+}
+
+func (entry *Entry) Tracef(format string, args ...interface{}) {
+	entry.Logf(TraceLevel, format, args...)
+}
+
+func (entry *Entry) Debugf(format string, args ...interface{}) {
+	entry.Logf(DebugLevel, format, args...)
+}
+
+func (entry *Entry) Infof(format string, args ...interface{}) {
+	entry.Logf(InfoLevel, format, args...)
+}
+
+func (entry *Entry) Printf(format string, args ...interface{}) {
+	entry.Infof(format, args...)
+}
+
+func (entry *Entry) Warnf(format string, args ...interface{}) {
+	entry.Logf(WarnLevel, format, args...)
+}
+
+func (entry *Entry) Warningf(format string, args ...interface{}) {
+	entry.Warnf(format, args...)
+}
+
+func (entry *Entry) Errorf(format string, args ...interface{}) {
+	entry.Logf(ErrorLevel, format, args...)
+}
+
+func (entry *Entry) Fatalf(format string, args ...interface{}) {
+	entry.Logf(FatalLevel, format, args...)
+	entry.Logger.Exit(1)
+}
+
+func (entry *Entry) Panicf(format string, args ...interface{}) {
+	entry.Logf(PanicLevel, format, args...)
+}
+
+// Entry Println family functions
+
+func (entry *Entry) Logln(level Level, args ...interface{}) {
+	if entry.Logger.IsLevelEnabled(level) {
+		entry.Log(level, entry.sprintlnn(args...))
+	}
+}
+
+func (entry *Entry) Traceln(args ...interface{}) {
+	entry.Logln(TraceLevel, args...)
+}
+
+func (entry *Entry) Debugln(args ...interface{}) {
+	entry.Logln(DebugLevel, args...)
+}
+
+func (entry *Entry) Infoln(args ...interface{}) {
+	entry.Logln(InfoLevel, args...)
+}
+
+func (entry *Entry) Println(args ...interface{}) {
+	entry.Infoln(args...)
+}
+
+func (entry *Entry) Warnln(args ...interface{}) {
+	entry.Logln(WarnLevel, args...)
+}
+
+func (entry *Entry) Warningln(args ...interface{}) {
+	entry.Warnln(args...)
+}
+
+func (entry *Entry) Errorln(args ...interface{}) {
+	entry.Logln(ErrorLevel, args...)
+}
+
+func (entry *Entry) Fatalln(args ...interface{}) {
+	entry.Logln(FatalLevel, args...)
+	entry.Logger.Exit(1)
+}
+
+func (entry *Entry) Panicln(args ...interface{}) {
+	entry.Logln(PanicLevel, args...)
+}
+
+// Sprintlnn => Sprint no newline. This is to get the behavior of how
+// fmt.Sprintln where spaces are always added between operands, regardless of
+// their type. Instead of vendoring the Sprintln implementation to spare a
+// string allocation, we do the simplest thing.
+func (entry *Entry) sprintlnn(args ...interface{}) string {
+	msg := fmt.Sprintln(args...)
+	return msg[:len(msg)-1]
+}

vendor/github.com/sirupsen/logrus/exported.go

@@ -0,0 +1,225 @@
+package logrus
+
+import (
+	"context"
+	"io"
+	"time"
+)
+
+var (
+	// std is the name of the standard logger in stdlib `log`
+	std = New()
+)
+
+func StandardLogger() *Logger {
+	return std
+}
+
+// SetOutput sets the standard logger output.
+func SetOutput(out io.Writer) {
+	std.SetOutput(out)
+}
+
+// SetFormatter sets the standard logger formatter.
+func SetFormatter(formatter Formatter) {
+	std.SetFormatter(formatter)
+}
+
+// SetReportCaller sets whether the standard logger will include the calling
+// method as a field.
+func SetReportCaller(include bool) {
+	std.SetReportCaller(include)
+}
+
+// SetLevel sets the standard logger level.
+func SetLevel(level Level) {
+	std.SetLevel(level)
+}
+
+// GetLevel returns the standard logger level.
+func GetLevel() Level {
+	return std.GetLevel()
+}
+
+// IsLevelEnabled checks if the log level of the standard logger is greater than the level param
+func IsLevelEnabled(level Level) bool {
+	return std.IsLevelEnabled(level)
+}
+
+// AddHook adds a hook to the standard logger hooks.
+func AddHook(hook Hook) {
+	std.AddHook(hook)
+}
+
+// WithError creates an entry from the standard logger and adds an error to it, using the value defined in ErrorKey as key.
+func WithError(err error) *Entry {
+	return std.WithField(ErrorKey, err)
+}
+
+// WithContext creates an entry from the standard logger and adds a context to it.
+func WithContext(ctx context.Context) *Entry {
+	return std.WithContext(ctx)
+}
+
+// WithField creates an entry from the standard logger and adds a field to
+// it. If you want multiple fields, use `WithFields`.
+//
+// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
+// or Panic on the Entry it returns.
+func WithField(key string, value interface{}) *Entry {
+	return std.WithField(key, value)
+}
+
+// WithFields creates an entry from the standard logger and adds multiple
+// fields to it. This is simply a helper for `WithField`, invoking it
+// once for each field.
+//
+// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
+// or Panic on the Entry it returns.
+func WithFields(fields Fields) *Entry {
+	return std.WithFields(fields)
+}
+
+// WithTime creates an entry from the standard logger and overrides the time of
+// logs generated with it.
+//
+// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
+// or Panic on the Entry it returns.
+func WithTime(t time.Time) *Entry {
+	return std.WithTime(t)
+}
+
+// Trace logs a message at level Trace on the standard logger.
+func Trace(args ...interface{}) {
+	std.Trace(args...)
+}
+
+// Debug logs a message at level Debug on the standard logger.
+func Debug(args ...interface{}) {
+	std.Debug(args...)
+}
+
+// Print logs a message at level Info on the standard logger.
+func Print(args ...interface{}) {
+	std.Print(args...)
+}
+
+// Info logs a message at level Info on the standard logger.
+func Info(args ...interface{}) {
+	std.Info(args...)
+}
+
+// Warn logs a message at level Warn on the standard logger.
+func Warn(args ...interface{}) {
+	std.Warn(args...)
+}
+
+// Warning logs a message at level Warn on the standard logger.
+func Warning(args ...interface{}) {
+	std.Warning(args...)
+}
+
+// Error logs a message at level Error on the standard logger.
+func Error(args ...interface{}) {
+	std.Error(args...)
+}
+
+// Panic logs a message at level Panic on the standard logger.
+func Panic(args ...interface{}) {
+	std.Panic(args...)
+}
+
+// Fatal logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
+func Fatal(args ...interface{}) {
+	std.Fatal(args...)
+}
+
+// Tracef logs a message at level Trace on the standard logger.
+func Tracef(format string, args ...interface{}) {
+	std.Tracef(format, args...)
+}
+
+// Debugf logs a message at level Debug on the standard logger.
+func Debugf(format string, args ...interface{}) {
+	std.Debugf(format, args...)
+}
+
+// Printf logs a message at level Info on the standard logger.
+func Printf(format string, args ...interface{}) {
+	std.Printf(format, args...)
+}
+
+// Infof logs a message at level Info on the standard logger.
+func Infof(format string, args ...interface{}) {
+	std.Infof(format, args...)
+}
+
+// Warnf logs a message at level Warn on the standard logger.
+func Warnf(format string, args ...interface{}) {
+	std.Warnf(format, args...)
+}
+
+// Warningf logs a message at level Warn on the standard logger.
+func Warningf(format string, args ...interface{}) {
+	std.Warningf(format, args...)
+}
+
+// Errorf logs a message at level Error on the standard logger.
+func Errorf(format string, args ...interface{}) {
+	std.Errorf(format, args...)
+}
+
+// Panicf logs a message at level Panic on the standard logger.
+func Panicf(format string, args ...interface{}) {
+	std.Panicf(format, args...)
+}
+
+// Fatalf logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
+func Fatalf(format string, args ...interface{}) {
+	std.Fatalf(format, args...)
+}
+
+// Traceln logs a message at level Trace on the standard logger.
+func Traceln(args ...interface{}) {
+	std.Traceln(args...)
+}
+
+// Debugln logs a message at level Debug on the standard logger.
+func Debugln(args ...interface{}) {
+	std.Debugln(args...)
+}
+
+// Println logs a message at level Info on the standard logger.
+func Println(args ...interface{}) {
+	std.Println(args...)
+}
+
+// Infoln logs a message at level Info on the standard logger.
+func Infoln(args ...interface{}) {
+	std.Infoln(args...)
+}
+
+// Warnln logs a message at level Warn on the standard logger.
+func Warnln(args ...interface{}) {
+	std.Warnln(args...)
+}
+
+// Warningln logs a message at level Warn on the standard logger.
+func Warningln(args ...interface{}) {
+	std.Warningln(args...)
+}
+
+// Errorln logs a message at level Error on the standard logger.
+func Errorln(args ...interface{}) {
+	std.Errorln(args...)
+}
+
+// Panicln logs a message at level Panic on the standard logger.
+func Panicln(args ...interface{}) {
+	std.Panicln(args...)
+}
+
+// Fatalln logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
+func Fatalln(args ...interface{}) {
+	std.Fatalln(args...)
+}

vendor/github.com/sirupsen/logrus/formatter.go

@@ -0,0 +1,78 @@
+package logrus
+
+import "time"
+
+// Default key names for the default fields
+const (
+	defaultTimestampFormat = time.RFC3339
+	FieldKeyMsg            = "msg"
+	FieldKeyLevel          = "level"
+	FieldKeyTime           = "time"
+	FieldKeyLogrusError    = "logrus_error"
+	FieldKeyFunc           = "func"
+	FieldKeyFile           = "file"
+)
+
+// The Formatter interface is used to implement a custom Formatter. It takes an
+// `Entry`. It exposes all the fields, including the default ones:
+//
+// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
+// * `entry.Data["time"]`. The timestamp.
+// * `entry.Data["level"]. The level the entry was logged at.
+//
+// Any additional fields added with `WithField` or `WithFields` are also in
+// `entry.Data`. Format is expected to return an array of bytes which are then
+// logged to `logger.Out`.
+type Formatter interface {
+	Format(*Entry) ([]byte, error)
+}
+
+// This is to not silently overwrite `time`, `msg`, `func` and `level` fields when
+// dumping it. If this code wasn't there doing:
+//
+//  logrus.WithField("level", 1).Info("hello")
+//
+// Would just silently drop the user provided level. Instead with this code
+// it'll logged as:
+//
+//  {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
+//
+// It's not exported because it's still using Data in an opinionated way. It's to
+// avoid code duplication between the two default formatters.
+func prefixFieldClashes(data Fields, fieldMap FieldMap, reportCaller bool) {
+	timeKey := fieldMap.resolve(FieldKeyTime)
+	if t, ok := data[timeKey]; ok {
+		data["fields."+timeKey] = t
+		delete(data, timeKey)
+	}
+
+	msgKey := fieldMap.resolve(FieldKeyMsg)
+	if m, ok := data[msgKey]; ok {
+		data["fields."+msgKey] = m
+		delete(data, msgKey)
+	}
+
+	levelKey := fieldMap.resolve(FieldKeyLevel)
+	if l, ok := data[levelKey]; ok {
+		data["fields."+levelKey] = l
+		delete(data, levelKey)
+	}
+
+	logrusErrKey := fieldMap.resolve(FieldKeyLogrusError)
+	if l, ok := data[logrusErrKey]; ok {
+		data["fields."+logrusErrKey] = l
+		delete(data, logrusErrKey)
+	}
+
+	// If reportCaller is not set, 'func' will not conflict.
+	if reportCaller {
+		funcKey := fieldMap.resolve(FieldKeyFunc)
+		if l, ok := data[funcKey]; ok {
+			data["fields."+funcKey] = l
+		}
+		fileKey := fieldMap.resolve(FieldKeyFile)
+		if l, ok := data[fileKey]; ok {
+			data["fields."+fileKey] = l
+		}
+	}
+}

vendor/github.com/sirupsen/logrus/go.mod

@@ -0,0 +1,11 @@
+module github.com/sirupsen/logrus
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.2.2
+	golang.org/x/sys v0.0.0-20190422165155-953cdadca894
+)
+
+go 1.13

vendor/github.com/sirupsen/logrus/go.sum

@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/sirupsen/logrus/hooks.go

@@ -0,0 +1,34 @@
+package logrus
+
+// A hook to be fired when logging on the logging levels returned from
+// `Levels()` on your implementation of the interface. Note that this is not
+// fired in a goroutine or a channel with workers, you should handle such
+// functionality yourself if your call is non-blocking and you don't wish for
+// the logging calls for levels returned from `Levels()` to block.
+type Hook interface {
+	Levels() []Level
+	Fire(*Entry) error
+}
+
+// Internal type for storing the hooks on a logger instance.
+type LevelHooks map[Level][]Hook
+
+// Add a hook to an instance of logger. This is called with
+// `log.Hooks.Add(new(MyHook))` where `MyHook` implements the `Hook` interface.
+func (hooks LevelHooks) Add(hook Hook) {
+	for _, level := range hook.Levels() {
+		hooks[level] = append(hooks[level], hook)
+	}
+}
+
+// Fire all the hooks for the passed level. Used by `entry.log` to fire
+// appropriate hooks for a log entry.
+func (hooks LevelHooks) Fire(level Level, entry *Entry) error {
+	for _, hook := range hooks[level] {
+		if err := hook.Fire(entry); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

vendor/github.com/sirupsen/logrus/json_formatter.go

@@ -0,0 +1,125 @@
+package logrus
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"runtime"
+)
+
+type fieldKey string
+
+// FieldMap allows customization of the key names for default fields.
+type FieldMap map[fieldKey]string
+
+func (f FieldMap) resolve(key fieldKey) string {
+	if k, ok := f[key]; ok {
+		return k
+	}
+
+	return string(key)
+}
+
+// JSONFormatter formats logs into parsable json
+type JSONFormatter struct {
+	// TimestampFormat sets the format used for marshaling timestamps.
+	TimestampFormat string
+
+	// DisableTimestamp allows disabling automatic timestamps in output
+	DisableTimestamp bool
+
+	// DisableHTMLEscape allows disabling html escaping in output
+	DisableHTMLEscape bool
+
+	// DataKey allows users to put all the log entry parameters into a nested dictionary at a given key.
+	DataKey string
+
+	// FieldMap allows users to customize the names of keys for default fields.
+	// As an example:
+	// formatter := &JSONFormatter{
+	//   	FieldMap: FieldMap{
+	// 		 FieldKeyTime:  "@timestamp",
+	// 		 FieldKeyLevel: "@level",
+	// 		 FieldKeyMsg:   "@message",
+	// 		 FieldKeyFunc:  "@caller",
+	//    },
+	// }
+	FieldMap FieldMap
+
+	// CallerPrettyfier can be set by the user to modify the content
+	// of the function and file keys in the json data when ReportCaller is
+	// activated. If any of the returned value is the empty string the
+	// corresponding key will be removed from json fields.
+	CallerPrettyfier func(*runtime.Frame) (function string, file string)
+
+	// PrettyPrint will indent all json logs
+	PrettyPrint bool
+}
+
+// Format renders a single log entry
+func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
+	data := make(Fields, len(entry.Data)+4)
+	for k, v := range entry.Data {
+		switch v := v.(type) {
+		case error:
+			// Otherwise errors are ignored by `encoding/json`
+			// https://github.com/sirupsen/logrus/issues/137
+			data[k] = v.Error()
+		default:
+			data[k] = v
+		}
+	}
+
+	if f.DataKey != "" {
+		newData := make(Fields, 4)
+		newData[f.DataKey] = data
+		data = newData
+	}
+
+	prefixFieldClashes(data, f.FieldMap, entry.HasCaller())
+
+	timestampFormat := f.TimestampFormat
+	if timestampFormat == "" {
+		timestampFormat = defaultTimestampFormat
+	}
+
+	if entry.err != "" {
+		data[f.FieldMap.resolve(FieldKeyLogrusError)] = entry.err
+	}
+	if !f.DisableTimestamp {
+		data[f.FieldMap.resolve(FieldKeyTime)] = entry.Time.Format(timestampFormat)
+	}
+	data[f.FieldMap.resolve(FieldKeyMsg)] = entry.Message
+	data[f.FieldMap.resolve(FieldKeyLevel)] = entry.Level.String()
+	if entry.HasCaller() {
+		funcVal := entry.Caller.Function
+		fileVal := fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
+		if f.CallerPrettyfier != nil {
+			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
+		}
+		if funcVal != "" {
+			data[f.FieldMap.resolve(FieldKeyFunc)] = funcVal
+		}
+		if fileVal != "" {
+			data[f.FieldMap.resolve(FieldKeyFile)] = fileVal
+		}
+	}
+
+	var b *bytes.Buffer
+	if entry.Buffer != nil {
+		b = entry.Buffer
+	} else {
+		b = &bytes.Buffer{}
+	}
+
+	encoder := json.NewEncoder(b)
+	encoder.SetEscapeHTML(!f.DisableHTMLEscape)
+	if f.PrettyPrint {
+		encoder.SetIndent("", "  ")
+	}
+	if err := encoder.Encode(data); err != nil {
+		return nil, fmt.Errorf("failed to marshal fields to JSON, %v", err)
+	}
+
+	return b.Bytes(), nil
+}