chore: update dependencies

* add new rotation axis
 * resize image if necessary
 * add debug logs

.gitignore

@@ -284,3 +284,6 @@ local.properties
 
 ./rc-*
 rc-simulator
+rc-simulator.*
+
+build/

build-docker.sh

@@ -0,0 +1,50 @@
+#! /bin/bash
+
+IMAGE_NAME=robocar-simulator
+TAG=$(git describe)
+FULL_IMAGE_NAME=docker.io/cyrilix/${IMAGE_NAME}:${TAG}
+BINARY=rc-simulator
+
+GOTAGS="-tags netgo"
+
+image_build(){
+  local platform=$1
+
+
+  GOOS=$(echo $platform | cut -f1 -d/) && \
+  GOARCH=$(echo $platform | cut -f2 -d/) && \
+  GOARM=$(echo $platform | cut -f3 -d/ | sed "s/v//" )
+  VARIANT="--variant $(echo $platform | cut -f3 -d/  )"
+  if [[ -z "$GOARM" ]] ;
+  then
+  VARIANT=""
+  fi
+
+  local binary_suffix="$GOARCH$(echo $platform | cut -f3 -d/ )"
+
+  local containerName="$IMAGE_NAME-$GOARCH$GOARM"
+
+
+  printf "\n\nBuild go binary %s\n\n" "${BINARY}.${binary_suffix}"
+  mkdir -p build
+  CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} GOARM=${GOARM} go build -mod vendor -a ${GOTAGS} -o "build/${BINARY}.${binary_suffix}" ./cmd/${BINARY}/
+
+  buildah --os "$GOOS" --arch "$GOARCH" $VARIANT  --name "$containerName" from gcr.io/distroless/static
+  buildah config --user 1234 "$containerName"
+  buildah copy "$containerName" "build/${BINARY}.${binary_suffix}" /go/bin/$BINARY
+  buildah config --entrypoint '["/go/bin/'$BINARY'"]' "${containerName}"
+
+  buildah commit --rm --manifest $IMAGE_NAME "${containerName}" "${containerName}"
+}
+
+buildah rmi localhost/$IMAGE_NAME
+buildah manifest rm localhost/${IMAGE_NAME}
+
+image_build linux/amd64
+image_build linux/arm64
+image_build linux/arm/v7
+
+
+# push image
+printf "\n\nPush manifest to %s\n\n" ${FULL_IMAGE_NAME}
+buildah manifest push --rm -f v2s2 "localhost/$IMAGE_NAME" "docker://$FULL_IMAGE_NAME" --all

cmd/rc-simulator/rc-simultator.go

@@ -10,7 +10,8 @@ import (
 	"github.com/cyrilix/robocar-simulator/pkg/simulator"
 	mqtt "github.com/eclipse/paho.mqtt.golang"
 	"github.com/golang/protobuf/proto"
-	log "github.com/sirupsen/logrus"
+	"go.uber.org/zap"
+	"log"
 	"os"
 	"strconv"
 	"strings"
@@ -22,7 +23,6 @@ func main() {
 	var mqttBroker, username, password, clientId, topicFrame, topicSteering, topicThrottle string
 	var topicCtrlSteering, topicCtrlThrottle string
 	var address string
-	var debug bool
 
 	mqttQos := cli.InitIntFlag("MQTT_QOS", 0)
 	_, mqttRetain := os.LookupEnv("MQTT_RETAIN")
@@ -35,7 +35,6 @@ func main() {
 	flag.StringVar(&topicCtrlSteering, "topic-steering-ctrl", os.Getenv("MQTT_TOPIC_STEERING_CTRL"), "Mqtt topic to send steering instructions, use MQTT_TOPIC_STEERING_CTRL if args not set")
 	flag.StringVar(&topicCtrlThrottle, "topic-throttle-ctrl", os.Getenv("MQTT_TOPIC_THROTTLE_CTRL"), "Mqtt topic to send throttle instructions, use MQTT_TOPIC_THROTTLE_CTRL if args not set")
 	flag.StringVar(&address, "simulator-address", "127.0.0.1:9091", "Simulator address")
-	flag.BoolVar(&debug, "debug", false, "Debug logs")
 
 	var carName, carStyle, carColor string
 	var carFontSize int
@@ -57,7 +56,7 @@ func main() {
 
 	var cameraFov, cameraImgW, cameraImgH, cameraImgD int
 	var cameraFishEyeX, cameraFishEyeY float64
-	var cameraOffsetX, cameraOffsetY, cameraOffsetZ, cameraRotX float64
+	var cameraOffsetX, cameraOffsetY, cameraOffsetZ, cameraRotX, cameraRotY, cameraRotZ float64
 	var cameraImgEnc string
 	flag.IntVar(&cameraFov, "camera-fov", 90, "")
 	flag.Float64Var(&cameraFishEyeX, "camera-fish-eye-x", 0.4, "")
@@ -69,20 +68,35 @@ func main() {
 	flag.Float64Var(&cameraOffsetX, "camera-offset-x", 0, "moves camera left/right")
 	flag.Float64Var(&cameraOffsetY, "camera-offset-y", 1.120395, "moves camera up/down")
 	flag.Float64Var(&cameraOffsetZ, "camera-offset-z", 0.5528488, "moves camera forward/back")
-	flag.Float64Var(&cameraRotX, "camera-rot-x", 15.0, "rotate the camera")
+	flag.Float64Var(&cameraRotX, "camera-rot-x", 15.0, "rotate the camera around x-axis")
+	flag.Float64Var(&cameraRotY, "camera-rot-y", 0.0, "rotate the camera around y-axis")
+	flag.Float64Var(&cameraRotZ, "camera-rot-z", 0.0, "rotate the camera around z-axis")
+
+	logLevel := zap.LevelFlag("log", zap.InfoLevel, "log level")
 
 	flag.Parse()
+
 	if len(os.Args) <= 1 {
 		flag.PrintDefaults()
 		os.Exit(1)
 	}
-	if debug {
+
-		log.SetLevel(log.DebugLevel)
+	config := zap.NewDevelopmentConfig()
+	config.Level = zap.NewAtomicLevelAt(*logLevel)
+	lgr, err := config.Build()
+	if err != nil {
+		log.Fatalf("unable to init logger: %v", err)
 	}
+	defer func() {
+		if err := lgr.Sync(); err != nil {
+			log.Printf("unable to Sync logger: %v\n", err)
+		}
+	}()
+	zap.ReplaceGlobals(lgr)
 
 	client, err := cli.Connect(mqttBroker, username, password, clientId)
 	if err != nil {
-		log.Fatalf("unable to connect to events broker: %v", err)
+		zap.S().Fatalf("unable to connect to events broker: %v", err)
 	}
 	defer client.Disconnect(10)
 
@@ -108,17 +122,22 @@ func main() {
 		MsgType:  simulator.MsgTypeCameraConfig,
 		Fov:      strconv.Itoa(cameraFov),
 		FishEyeX: fmt.Sprintf("%.2f", cameraFishEyeX),
-		FishEyeY: fmt.Sprintf("%.2f",cameraFishEyeY),
+		FishEyeY: fmt.Sprintf("%.2f", cameraFishEyeY),
 		ImgW:     strconv.Itoa(cameraImgW),
 		ImgH:     strconv.Itoa(cameraImgH),
 		ImgD:     strconv.Itoa(cameraImgD),
 		ImgEnc:   simulator.CameraImageEnc(cameraImgEnc),
-		OffsetX:  fmt.Sprintf("%.2f",cameraOffsetX),
+		OffsetX:  fmt.Sprintf("%.2f", cameraOffsetX),
 		OffsetY:  fmt.Sprintf("%.2f", cameraOffsetY),
 		OffsetZ:  fmt.Sprintf("%.2f", cameraOffsetZ),
 		RotX:     fmt.Sprintf("%.2f", cameraRotX),
+		RotY:     fmt.Sprintf("%.2f", cameraRotY),
+		RotZ:     fmt.Sprintf("%.2f", cameraRotZ),
+	}
+	gtw, err := gateway.New(address, &carConfig, &racer, &camera)
+	if err != nil {
+		zap.S().Fatalf("unable to init gateway: %v", err)
 	}
-	gtw := gateway.New(address, &carConfig, &racer, &camera)
 	defer gtw.Stop()
 
 	msgPub := events.NewMsgPublisher(
@@ -134,13 +153,13 @@ func main() {
 	cli.HandleExit(gtw)
 
 	if topicCtrlSteering != "" {
-		log.Infof("configure mqtt route on steering command")
+		zap.S().Info("configure mqtt route on steering command")
 		client.Subscribe(topicCtrlSteering, byte(mqttQos), func(client mqtt.Client, message mqtt.Message) {
 			onSteeringCommand(gtw, message)
 		})
 	}
 	if topicCtrlThrottle != "" {
-		log.Infof("configure mqtt route on throttle command")
+		zap.S().Info("configure mqtt route on throttle command")
 		client.Subscribe(topicCtrlThrottle, byte(mqttQos), func(client mqtt.Client, message mqtt.Message) {
 			onThrottleCommand(gtw, message)
 		})
@@ -148,7 +167,7 @@ func main() {
 
 	err = gtw.Start()
 	if err != nil {
-		log.Fatalf("unable to start service: %v", err)
+		zap.S().Fatalf("unable to start service: %v", err)
 	}
 
 }
@@ -157,7 +176,7 @@ func onSteeringCommand(c *gateway.Gateway, message mqtt.Message) {
 	var steeringMsg events2.SteeringMessage
 	err := proto.Unmarshal(message.Payload(), &steeringMsg)
 	if err != nil {
-		log.Errorf("unable to unmarshal steering msg: %v", err)
+		zap.S().Errorf("unable to unmarshal steering msg: %v", err)
 		return
 	}
 	c.WriteSteering(&steeringMsg)
@@ -167,7 +186,7 @@ func onThrottleCommand(c *gateway.Gateway, message mqtt.Message) {
 	var throttleMsg events2.ThrottleMessage
 	err := proto.Unmarshal(message.Payload(), &throttleMsg)
 	if err != nil {
-		log.Errorf("unable to unmarshal throttle msg: %v", err)
+		zap.S().Errorf("unable to unmarshal throttle msg: %v", err)
 		return
 	}
 	c.WriteThrottle(&throttleMsg)

go.mod

@@ -4,16 +4,19 @@ go 1.17
 
 require (
 	github.com/avast/retry-go v3.0.0+incompatible
-	github.com/cyrilix/robocar-base v0.1.4
+	github.com/cyrilix/robocar-base v0.1.6
-	github.com/cyrilix/robocar-protobuf/go v1.0.3
+	github.com/cyrilix/robocar-protobuf/go v1.0.4
+	github.com/disintegration/imaging v1.6.2
 	github.com/eclipse/paho.mqtt.golang v1.3.5
 	github.com/golang/protobuf v1.5.2
-	github.com/sirupsen/logrus v1.8.1
+	go.uber.org/zap v1.19.1
+	google.golang.org/protobuf v1.27.1
 )
 
 require (
 	github.com/gorilla/websocket v1.4.2 // indirect
-	golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
-	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd // indirect
+	go.uber.org/multierr v1.6.0 // indirect
-	google.golang.org/protobuf v1.26.0 // indirect
+	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
+	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
 )

go.sum

@@ -2,31 +2,27 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
 github.com/Microsoft/hcsshim v0.8.6/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
-github.com/avast/retry-go v2.6.0+incompatible h1:FelcMrm7Bxacr1/RM8+/eqkDkmVN7tjlsy51dOzB3LI=
-github.com/avast/retry-go v2.6.0+incompatible/go.mod h1:XtSnn+n/sHqQIpZ10K1qAevBhOOCWBLXXy3hyiqqBrY=
 github.com/avast/retry-go v3.0.0+incompatible h1:4SOWQ7Qs+oroOTQOYnAHqelpCO0biHSxpiH9JdtuBj0=
 github.com/avast/retry-go v3.0.0+incompatible/go.mod h1:XtSnn+n/sHqQIpZ10K1qAevBhOOCWBLXXy3hyiqqBrY=
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
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 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
-github.com/cyrilix/robocar-base v0.1.2 h1:bhT5ohhviodCOd5usy013ctwu7ko+IfyDXnYHg7lJ8I=
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-github.com/cyrilix/robocar-base v0.1.2/go.mod h1:G2SiYNUDAIv+65XWpiHnCXj7Jz2V6pOBLaIrcasGkww=
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-github.com/cyrilix/robocar-base v0.1.4 h1:nfnjRwAcCfS7xGu6tW9rZhmc/HZIsuDJX5NFhgX5dWE=
+github.com/cyrilix/robocar-protobuf/go v1.0.4 h1:XTolFYbiKw4gQ2l+z/LMZkLrmAUMzlHcQBzp/czlANo=
-github.com/cyrilix/robocar-base v0.1.4/go.mod h1:Tt04UmbGBiQtU0Cn3wFD0q7XoyokTwIlWYQxThKI+04=
+github.com/cyrilix/robocar-protobuf/go v1.0.4/go.mod h1:1fyGMVm4ZodfYRrbWCEQgtvKyvrhyTBe5zA7/Qeh/H0=
-github.com/cyrilix/robocar-protobuf/go v1.0.2 h1:eWwu7T07uvABh74bWOJa77alUs6VaWNEPd7Zezua2Cs=
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-github.com/cyrilix/robocar-protobuf/go v1.0.3 h1:iPHw2+7FVXG2C4+Th1m11hQ+2RpAQzlxKhc5M7XOa6Q=
-github.com/cyrilix/robocar-protobuf/go v1.0.3/go.mod h1:xb95cK07lYXnKcHZKnGafmAgYRrqZWZgV9LMiJAp+gE=
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 github.com/docker/docker v17.12.0-ce-rc1.0.20200916142827-bd33bbf0497b+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
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-github.com/eclipse/paho.mqtt.golang v1.3.1 h1:6F5FYb1hxVSZS+p0ji5xBQamc5ltOolTYRy5R15uVmI=
-github.com/eclipse/paho.mqtt.golang v1.3.1/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
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@@ -43,21 +39,11 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfU
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
-github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
-github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
-github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
-github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
-github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
-github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
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-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
-github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -69,10 +55,8 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@@ -86,38 +70,54 @@ github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQ
 github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 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/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
-github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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 github.com/testcontainers/testcontainers-go v0.9.0/go.mod h1:b22BFXhRbg4PJmeMVWh6ftqjyZHgiIl3w274e9r3C2E=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
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+go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
+go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
+go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
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 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
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 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73 h1:MXfv8rhZWmFeqX3GNZRsd6vOLoaCHjYEX3qkRo3YBUA=
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-golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -125,39 +125,44 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
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 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
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 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
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-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v0.0.0-20181223230014-1083505acf35/go.mod h1:R//lfYlUuTOTfblYI3lGoAAAebUdzjvbmQsuB7Ykd90=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

pkg/events/events.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"github.com/cyrilix/robocar-simulator/pkg/gateway"
 	mqtt "github.com/eclipse/paho.mqtt.golang"
-	"github.com/golang/protobuf/proto"
+	"go.uber.org/zap"
-	log "github.com/sirupsen/logrus"
+	"google.golang.org/protobuf/proto"
 	"sync"
 	"time"
 )
@@ -59,7 +59,7 @@ func (m *MsgPublisher) Stop() {
 }
 
 func (m *MsgPublisher) listenThrottle() {
-	logr := log.WithField("msg_type", "throttleChan")
+	logr := zap.S().With("msg_type", "throttleChan")
 	msgChan := m.srcEvents.SubscribeThrottle()
 	for {
 		select {
@@ -83,7 +83,7 @@ func (m *MsgPublisher) listenThrottle() {
 }
 
 func (m *MsgPublisher) listenSteering() {
-	logr := log.WithField("msg_type", "steeringChan")
+	logr := zap.S().With("msg_type", "steeringChan")
 	msgChan := m.srcEvents.SubscribeSteering()
 	for {
 		select {
@@ -107,12 +107,13 @@ func (m *MsgPublisher) listenSteering() {
 }
 
 func (m *MsgPublisher) listenFrame() {
-	logr := log.WithField("msg_type", "frame")
+	logr := zap.S().With("msg_type", "frame")
 	msgChan := m.srcEvents.SubscribeFrame()
 	for {
 		msg := <-msgChan
 		if msg == nil {
 			// channel closed
+			logr.Info("received empty message, channel closed")
 			break
 		}
 		logr.Debugf("new frame %v", msg.Id)

pkg/events/events_test.go

@@ -3,8 +3,8 @@ package events
 import (
 	"fmt"
 	"github.com/cyrilix/robocar-protobuf/go/events"
-	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/ptypes/timestamp"
+	"google.golang.org/protobuf/proto"
 	"testing"
 	"time"
 )

pkg/gateway/controls_test.go

@@ -40,7 +40,7 @@ func TestGateway_Start(t *testing.T) {
 		OffsetZ:  "0",
 		RotX:     "0",
 	}
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&carConfig,
 		&simulator.RacerBioMsg{},
 		&camConfig,
@@ -130,10 +130,13 @@ func TestGateway_WriteSteering(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
-		&simulator.CamConfigMsg{})
+		&simulator.CamConfigMsg{
+		ImgH: "128",
+		ImgW: "160",
+		})
 	if err != nil {
 		t.Fatalf("unable to init simulator gateway: %v", err)
 	}
@@ -254,10 +257,16 @@ func TestGateway_WriteThrottle(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(), &simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
+	gw, err := New(simulatorMock.Addr(), &simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
-		&simulator.CamConfigMsg{})
+		&simulator.CamConfigMsg{
+			ImgH: "128",
+			ImgW: "160",
+		})
 
+	if err != nil {
+		t.Fatalf("unable to init simulator gateway: %v", err)
+	}
 	//go gw.Start()
 
 	//<- simulatorMock.NotifyCar()

pkg/gateway/gateway.go

@@ -2,15 +2,20 @@ package gateway
 
 import (
 	"bufio"
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"github.com/avast/retry-go"
 	"github.com/cyrilix/robocar-protobuf/go/events"
 	"github.com/cyrilix/robocar-simulator/pkg/simulator"
+	"github.com/disintegration/imaging"
 	"github.com/golang/protobuf/ptypes/timestamp"
-	log "github.com/sirupsen/logrus"
+	"go.uber.org/zap"
+	"image"
+	"image/jpeg"
 	"io"
 	"net"
+	"strconv"
 	"sync"
 	"time"
 )
@@ -31,10 +36,19 @@ type ThrottleSource interface {
 	SubscribeThrottle() <-chan *events.ThrottleMessage
 }
 
-func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.RacerBioMsg, camera *simulator.CamConfigMsg) *Gateway {
+func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.RacerBioMsg, camera *simulator.CamConfigMsg) (*Gateway, error) {
-	l := log.WithField("simulator", addressSimulator)
+	l := zap.S().With("simulator", addressSimulator)
 	l.Info("run gateway from simulator")
 
+	imgHeight, err := strconv.Atoi(camera.ImgH)
+	if err != nil {
+		return nil, fmt.Errorf("invalid camera configuration, height should be a number: %w", err)
+	}
+	imgWidth, err := strconv.Atoi(camera.ImgW)
+	if err != nil {
+		return nil, fmt.Errorf("invalid camera configuration, width should be a number: %w", err)
+	}
+
 	return &Gateway{
 		address:              addressSimulator,
 		log:                  l,
@@ -46,12 +60,14 @@ func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.
 		racerSubscribers:     make(map[chan *simulator.Msg]interface{}),
 		cameraSubscribers:    make(map[chan *simulator.Msg]interface{}),
 		carConfig:            car,
+		imgWidth:             imgWidth,
+		imgHeight:            imgHeight,
 		racer:                racer,
 		cameraConfig:         camera,
-	}
+	}, nil
 }
 
-/* Simulator interface to events gateway frames into events topicFrame */
+// Gateway is Simulator interface to events gateway frames into events topicFrame
 type Gateway struct {
 	cancel chan interface{}
 
@@ -64,7 +80,7 @@ type Gateway struct {
 	muControl   sync.Mutex
 	lastControl *simulator.ControlMsg
 
-	log *log.Entry
+	log *zap.SugaredLogger
 
 	frameSubscribers    map[chan<- *events.FrameMessage]interface{}
 	steeringSubscribers map[chan<- *events.SteeringMessage]interface{}
@@ -76,34 +92,46 @@ type Gateway struct {
 	cameraSubscribers    map[chan *simulator.Msg]interface{}
 
 	carConfig    *simulator.CarConfigMsg
+	imgHeight    int
+	imgWidth     int
 	racer        *simulator.RacerBioMsg
 	cameraConfig *simulator.CamConfigMsg
+
 }
 
 func (g *Gateway) Start() error {
 	g.log.Info("connect to simulator")
 	g.cancel = make(chan interface{})
-	msgChan := g.subscribeTelemetryEvents()
 
 	go g.run()
 
+
 	err := g.writeRacerConfig()
 	if err != nil {
 		return fmt.Errorf("unable to configure racer to server: %v", err)
 	}
-	err = g.writeCarConfig()
+
-	if err != nil {
-		return fmt.Errorf("unable to configure car to server: %v", err)
-	}
 	err = g.writeCameraConfig()
 	if err != nil {
 		return fmt.Errorf("unable to configure camera to server: %v", err)
 	}
 
+
+	err = g.writeCarConfig()
+	if err != nil {
+		return fmt.Errorf("unable to configure car to server: %v", err)
+	}
+
+	msgChan := g.subscribeTelemetryEvents()
 	for {
 		select {
 		case msg := <-msgChan:
-			fr := g.publishFrame(msg)
+			g.log.Debug("try to publish frame")
+			fr, err := g.publishFrame(msg)
+			if err != nil {
+				zap.S().Errorf("unable to publish frame, ignore event %v: %v", msg, err)
+			}
+			g.log.Debugf("frame published: %v", fr)
 			go g.publishInputSteering(msg, fr)
 			go g.publishInputThrottle(msg, fr)
 		case <-g.cancel:
@@ -195,66 +223,79 @@ func (g *Gateway) listen() error {
 		err = json.Unmarshal(rawLine, &msg)
 		if err != nil {
 			g.log.Errorf("unable to unmarshal simulator msg '%v': %v", string(rawLine), err)
+			continue
 		}
 
+		g.log.Debugf("new message of type %v", string(msg.MsgType))
 		switch msg.MsgType {
+		case "":
+			g.log.Debug("ping")
 		case simulator.MsgTypeTelemetry:
 			g.broadcastTelemetryMsg(rawLine)
 		case simulator.MsgTypeCarLoaded:
+			g.log.Debugf("car loaded: %v",string(rawLine))
+			if err := g.writeCarConfig(); err != nil{
+				zap.S().Errorf("unable to send car config: %v", err)
+			}
 			g.broadcastCarMsg(rawLine)
 		case simulator.MsgTypeRacerInfo:
 			g.broadcastRacerMsg(rawLine)
 		default:
-			log.Warnf("unmanaged simulator message: %v", string(rawLine))
+			g.log.Warnf("unmanaged simulator message: %v", string(rawLine))
 		}
 	}
 }
 
 func (g *Gateway) broadcastTelemetryMsg(rawLine []byte) {
-	for c := range g.telemetrySubscribers {
-
 	var tMsg simulator.TelemetryMsg
 	err := json.Unmarshal(rawLine, &tMsg)
 	if err != nil {
 		g.log.Errorf("unable to unmarshal telemetry simulator msg '%v': %v", string(rawLine), err)
+		return
 	}
+	g.log.Debugf("broadcast %d telemetry'", len(g.telemetrySubscribers))
+	for c := range g.telemetrySubscribers {
+		g.log.Debugf("broadcast telemetry ")
 		c <- &tMsg
 	}
 }
 
 func (g *Gateway) broadcastCarMsg(rawLine []byte) {
-	for c := range g.carSubscribers {
 	var tMsg simulator.Msg
 	err := json.Unmarshal(rawLine, &tMsg)
 	if err != nil {
 		g.log.Errorf("unable to unmarshal car simulator msg '%v': %v", string(rawLine), err)
+		return
 	}
+	for c := range g.carSubscribers {
 		c <- &tMsg
 	}
 }
 
 func (g *Gateway) broadcastRacerMsg(rawLine []byte) {
-	for c := range g.racerSubscribers {
 	var tMsg simulator.Msg
 	err := json.Unmarshal(rawLine, &tMsg)
 	if err != nil {
 		g.log.Errorf("unable to unmarshal racer simulator msg '%v': %v", string(rawLine), err)
+		return
 	}
+	for c := range g.racerSubscribers {
 		c <- &tMsg
 	}
 }
 func (g *Gateway) broadcastCameraMsg(rawLine []byte) {
-	for c := range g.cameraSubscribers {
 	var tMsg simulator.Msg
 	err := json.Unmarshal(rawLine, &tMsg)
 	if err != nil {
 		g.log.Errorf("unable to unmarshal camera simulator msg '%v': %v", string(rawLine), err)
+		return
 	}
+	for c := range g.cameraSubscribers {
 		c <- &tMsg
 	}
 }
 
-func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) *events.FrameRef {
+func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) (*events.FrameRef, error) {
 	now := time.Now()
 	frameRef := &events.FrameRef{
 		Name: "gateway",
@@ -264,17 +305,32 @@ func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) *events.FrameRef
 			Nanos:   int32(now.Nanosecond()),
 		},
 	}
+
 	msg := &events.FrameMessage{
 		Id:    frameRef,
 		Frame: msgSim.Image,
 	}
 
-	log.Debugf("events frame '%v/%v'", msg.Id.Name, msg.Id.Id)
+	img, _, err := image.Decode(bytes.NewReader(msgSim.Image))
+	if err != nil {
+		return nil, fmt.Errorf("bad image, skip simulator event: %w", err)
+	}
+	if img.Bounds().Dy() != g.imgHeight || img.Bounds().Dx() != g.imgWidth {
+		zap.S().Debugf("resize simulator image from (%vx%v) -> (%dx%d)", img.Bounds().Dx(), img.Bounds().Dy(), g.imgWidth, g.imgHeight)
+		img = imaging.Resize(img, g.imgWidth, g.imgHeight, imaging.NearestNeighbor)
+		var imgBuf bytes.Buffer
+		err = jpeg.Encode(&imgBuf, img, nil)
+		if err != nil {
+			return nil, fmt.Errorf("unable to encode to peg resized image: %w", err)
+		}
+		msg.Frame = imgBuf.Bytes()
+	}
 
+	g.log.Debugf("events frame '%v/%v'", msg.Id.Name, msg.Id.Id)
 	for fs := range g.frameSubscribers {
 		fs <- msg
 	}
-	return frameRef
+	return frameRef, nil
 }
 
 func (g *Gateway) publishInputSteering(msgSim *simulator.TelemetryMsg, frameRef *events.FrameRef) {
@@ -284,7 +340,7 @@ func (g *Gateway) publishInputSteering(msgSim *simulator.TelemetryMsg, frameRef
 		Confidence: 1.0,
 	}
 
-	log.Debugf("events steering '%v'", steering.Steering)
+	g.log.Debugf("events steering '%v'", steering.Steering)
 	for ss := range g.steeringSubscribers {
 		ss <- steering
 	}
@@ -297,7 +353,7 @@ func (g *Gateway) publishInputThrottle(msgSim *simulator.TelemetryMsg, frameRef
 		Confidence: 1.0,
 	}
 
-	log.Debugf("events throttle '%v'", msg.Throttle)
+	g.log.Debugf("events throttle '%v'", msg.Throttle)
 	for ts := range g.throttleSubscribers {
 		ts <- msg
 	}
@@ -374,6 +430,7 @@ func (g *Gateway) WriteSteering(message *events.SteeringMessage) {
 	g.initLastControlMsg()
 
 	g.lastControl.Steering = fmt.Sprintf("%.2f", message.Steering)
+	zap.S().Debugf("steering updated: %v", g.lastControl.Steering)
 	g.writeControlCommandToSimulator()
 }
 
@@ -398,10 +455,10 @@ func (g *Gateway) writeCommand(content []byte) error {
 		g.log.Errorf("unable to connect to simulator to send control command: %v", err)
 		return nil
 	}
-	log.Debugf("write command to simulator: %v", string(content))
+	g.log.Debugf("write command to simulator: %v", string(content))
 	w := bufio.NewWriter(g.conn)
 
-	_, err := w.Write(append(content, '\n'))
+	_, err := w.Write(content)
 	if err != nil {
 		return fmt.Errorf("unable to write control msg \"%#v\" to simulator: %v", g.lastControl, err)
 	}
@@ -425,6 +482,7 @@ func (g *Gateway) WriteThrottle(message *events.ThrottleMessage) {
 		g.lastControl.Brake = fmt.Sprintf("%.2f", -1*message.Throttle)
 	}
 
+	zap.S().Debugf("throttle updated: %v, brake: %v", g.lastControl.Throttle, g.lastControl.Brake)
 	g.writeControlCommandToSimulator()
 }
 
@@ -456,9 +514,13 @@ func (g *Gateway) writeCarConfig() error {
 		return fmt.Errorf("unable to send car config to simulator: %v", err)
 	}
 
-	msg := <-carChan
+	select {
+	case msg := <-carChan:
 		g.log.Infof("Car loaded: %v", msg)
-	time.Sleep(250 * time.Millisecond)
+	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after car loading")
+	}
+
 	return nil
 }
 
@@ -482,6 +544,7 @@ func (g *Gateway) writeRacerConfig() error {
 	case msg := <-racerChan:
 		g.log.Infof("Racer loaded: %v", msg)
 	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after racer loading")
 	}
 	return nil
 }
@@ -506,6 +569,7 @@ func (g *Gateway) writeCameraConfig() error {
 	case msg := <-cameraChan:
 		g.log.Infof("Camera configured: %v", msg)
 	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after camera loading")
 	}
 	return nil
 }

pkg/gateway/gateway_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"github.com/cyrilix/robocar-protobuf/go/events"
 	"github.com/cyrilix/robocar-simulator/pkg/simulator"
-	log "github.com/sirupsen/logrus"
+	"go.uber.org/zap"
 	"io/ioutil"
 	"strings"
 	"sync"
@@ -25,11 +25,14 @@ func TestGateway_ListenEvents(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
 		&simulator.CamConfigMsg{},
 	)
+	if err != nil {
+		t.Fatalf("unable to init test: %v", err)
+	}
 	go func() {
 		err := gw.Start()
 		if err != nil {
@@ -48,7 +51,7 @@ func TestGateway_ListenEvents(t *testing.T) {
 	simulatorMock.WaitConnection()
 	simulatorMock.EmitMsg(fmt.Sprintf("{\"msg_type\": \"%s\"}", simulator.MsgTypeCarLoaded))
 
-	log.Trace("read test data")
+	zap.S().Debug("read test data")
 	testContent, err := ioutil.ReadFile("testdata/msg.json")
 	lines := strings.Split(string(testContent), "\n")
 
@@ -93,7 +96,7 @@ func TestGateway_ListenEvents(t *testing.T) {
 				throttleIdRef = msg.FrameRef
 				wg.Done()
 			case <-finished:
-				log.Trace("loop ended")
+				zap.S().Debugf("loop ended")
 				endLoop = true
 			case <-timeout:
 				t.Errorf("not all event are published")

pkg/gateway/util_test.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/cyrilix/robocar-simulator/pkg/simulator"
-	log "github.com/sirupsen/logrus"
+	"go.uber.org/zap"
 	"io"
 	"net"
 	"sync"
@@ -51,7 +51,7 @@ func (c *Gw2SimMock) listen() error {
 		for {
 			conn, err := c.ln.Accept()
 			if err != nil {
-				log.Debugf("connection close: %v", err)
+				zap.S().Debugf("connection close: %v", err)
 				break
 			}
 			go c.handleConnection(conn)
@@ -65,6 +65,7 @@ func (c *Gw2SimMock) Addr() string {
 }
 
 func (c *Gw2SimMock) handleConnection(conn net.Conn) {
+	log := zap.S()
 	c.initOnce.Do(c.init)
 	reader := bufio.NewReader(conn)
 	writer := bufio.NewWriter(conn)
@@ -131,7 +132,7 @@ func (c *Gw2SimMock) handleConnection(conn net.Conn) {
 }
 
 func (c *Gw2SimMock) Close() error {
-	log.Debugf("close mock server")
+	zap.S().Debugf("close mock server")
 	err := c.ln.Close()
 	if err != nil {
 		return fmt.Errorf("unable to close mock server: %v", err)
@@ -154,7 +155,7 @@ type Sim2GwMock struct {
 	conn          net.Conn
 	writer        *bufio.Writer
 	newConnection chan net.Conn
-	logger        *log.Entry
+	logger        *zap.SugaredLogger
 }
 
 func (c *Sim2GwMock) EmitMsg(p string) (err error) {
@@ -187,7 +188,7 @@ func (c *Sim2GwMock) WaitConnection() {
 }
 
 func (c *Sim2GwMock) Start() error {
-	c.logger = log.WithField("simulator", "mock")
+	c.logger = zap.S().With("simulator", "mock")
 	c.newConnection = make(chan net.Conn)
 	ln, err := net.Listen("tcp", "127.0.0.1:")
 	c.ln = ln

pkg/simulator/simulator.go

@@ -29,7 +29,7 @@ type TelemetryMsg struct {
 	Cte           float64 `json:"cte"`
 }
 
-/* Json msg used to control cars. MsgType must be filled with "control" */
+// ControlMsg is json msg used to control cars. MsgType must be filled with "control"
 type ControlMsg struct {
 	MsgType  MsgType `json:"msg_type"`
 	Steering string  `json:"steering"`
@@ -113,4 +113,6 @@ type CamConfigMsg struct {
 	OffsetY  string         `json:"offset_y"`
 	OffsetZ  string         `json:"offset_z"`
 	RotX     string         `json:"rot_x"`
+	RotY     string         `json:"rot_y"`
+	RotZ     string         `json:"rot_z"`
 }

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

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"github.com/cyrilix/robocar-base/service"
 	MQTT "github.com/eclipse/paho.mqtt.golang"
-	"log"
+	"go.uber.org/zap"
 	"os"
 	"os/signal"
 	"strconv"
@@ -25,7 +25,7 @@ func SetIntDefaultValueFromEnv(value *int, key string, defaultValue int) error {
 		sVal = os.Getenv(key)
 		val, err := strconv.Atoi(sVal)
 		if err != nil {
-			log.Printf("unable to convert string to int: %v", err)
+			zap.S().Errorf("unable to convert string to int: %v", err)
 			return err
 		}
 		*value = val
@@ -40,7 +40,7 @@ func SetFloat64DefaultValueFromEnv(value *float64, key string, defaultValue floa
 		sVal = os.Getenv(key)
 		val, err := strconv.ParseFloat(sVal, 64)
 		if err != nil {
-			log.Printf("unable to convert string to float: %v", err)
+			zap.S().Errorf("unable to convert string to float: %v", err)
 			return err
 		}
 		*value = val
@@ -81,7 +81,7 @@ 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)
+		zap.S().Panicf("invalid int value: %v", err)
 	}
 	return value
 }
@@ -90,7 +90,7 @@ func InitFloat64Flag(key string, defValue float64) float64 {
 	var value float64
 	err := SetFloat64DefaultValueFromEnv(&value, key, defValue)
 	if err != nil {
-		log.Panicf("invalid value: %v", err)
+		zap.S().Panicf("invalid value: %v", err)
 	}
 	return value
 }
@@ -106,8 +106,8 @@ func Connect(uri, username, password, clientId string) (MQTT.Client, error) {
 	opts.SetDefaultPublishHandler(
 		//define a function for the default message handler
 		func(client MQTT.Client, msg MQTT.Message) {
-			fmt.Printf("TOPIC: %s\n", msg.Topic())
+			zap.S().Infof("TOPIC: %s", msg.Topic())
-			fmt.Printf("MSG: %s\n", msg.Payload())
+			zap.S().Infof("MSG: %s", msg.Payload())
 		})
 
 	//create and start a client using the above ClientOptions

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

@@ -3,21 +3,21 @@ package service
 import (
 	"fmt"
 	mqtt "github.com/eclipse/paho.mqtt.golang"
-	"log"
+	"go.uber.org/zap"
 )
 
 func StopService(name string, client mqtt.Client, topics ...string) {
-	log.Printf("Stop %s service", name)
+	zap.S().Infof("Stop %s service", name)
 	token := client.Unsubscribe(topics...)
 	token.Wait()
 	if token.Error() != nil {
-		log.Printf("unable to unsubscribe service: %v", token.Error())
+		zap.S().Errorf("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)
+	zap.S().Infof("Register callback on topic %v", topic)
 	token := client.Subscribe(topic, 0, callback)
 	token.Wait()
 	if token.Error() != nil {

vendor/github.com/cyrilix/robocar-protobuf/go/events/events.pb.go

@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.27.1
 // 	protoc        v3.12.4
 // source: events/events.proto
 

vendor/github.com/disintegration/imaging/.travis.yml

@@ -0,0 +1,12 @@
+language: go
+go:
+  - "1.10.x"
+  - "1.11.x"
+  - "1.12.x"
+
+before_install:
+  - go get github.com/mattn/goveralls
+
+script:
+  - go test -v -race -cover
+  - $GOPATH/bin/goveralls -service=travis-ci

vendor/github.com/disintegration/imaging/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014 Simon Eskildsen
+Copyright (c) 2012 Grigory Dryapak
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -9,13 +9,13 @@ 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
+The above copyright notice and this permission notice shall be included in all
-all copies or substantial portions of the Software.
+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
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-THE SOFTWARE.
+SOFTWARE.

vendor/github.com/disintegration/imaging/README.md

@@ -0,0 +1,226 @@
+# Imaging
+
+[![GoDoc](https://godoc.org/github.com/disintegration/imaging?status.svg)](https://godoc.org/github.com/disintegration/imaging)
+[![Build Status](https://travis-ci.org/disintegration/imaging.svg?branch=master)](https://travis-ci.org/disintegration/imaging)
+[![Coverage Status](https://coveralls.io/repos/github/disintegration/imaging/badge.svg?branch=master&service=github)](https://coveralls.io/github/disintegration/imaging?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/disintegration/imaging)](https://goreportcard.com/report/github.com/disintegration/imaging)
+
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements `image.Image` interface
+as an input, and return a new image of `*image.NRGBA` type (32bit RGBA colors, non-premultiplied alpha).
+
+## Installation
+
+    go get -u github.com/disintegration/imaging
+
+## Documentation
+
+http://godoc.org/github.com/disintegration/imaging
+
+## Usage examples
+
+A few usage examples can be found below. See the documentation for the full list of supported functions.
+
+### Image resizing
+
+```go
+// Resize srcImage to size = 128x128px using the Lanczos filter.
+dstImage128 := imaging.Resize(srcImage, 128, 128, imaging.Lanczos)
+
+// Resize srcImage to width = 800px preserving the aspect ratio.
+dstImage800 := imaging.Resize(srcImage, 800, 0, imaging.Lanczos)
+
+// Scale down srcImage to fit the 800x600px bounding box.
+dstImageFit := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+
+// Resize and crop the srcImage to fill the 100x100px area.
+dstImageFill := imaging.Fill(srcImage, 100, 100, imaging.Center, imaging.Lanczos)
+```
+
+Imaging supports image resizing using various resampling filters. The most notable ones:
+- `Lanczos` - A high-quality resampling filter for photographic images yielding sharp results.
+- `CatmullRom` - A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+- `MitchellNetravali` - A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+- `Linear` - Bilinear resampling filter, produces smooth output. Faster than cubic filters.
+- `Box` - Simple and fast averaging filter appropriate for downscaling. When upscaling it's similar to NearestNeighbor.
+- `NearestNeighbor` - Fastest resampling filter, no antialiasing.
+
+The full list of supported filters:  NearestNeighbor, Box, Linear, Hermite, MitchellNetravali, CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine. Custom filters can be created using ResampleFilter struct.
+
+**Resampling filters comparison**
+
+Original image:
+
+![srcImage](testdata/branches.png)
+
+The same image resized from 600x400px to 150x100px using different resampling filters.
+From faster (lower quality) to slower (higher quality):
+
+Filter                    | Resize result
+--------------------------|---------------------------------------------
+`imaging.NearestNeighbor` | ![dstImage](testdata/out_resize_nearest.png)
+`imaging.Linear`          | ![dstImage](testdata/out_resize_linear.png)
+`imaging.CatmullRom`      | ![dstImage](testdata/out_resize_catrom.png)
+`imaging.Lanczos`         | ![dstImage](testdata/out_resize_lanczos.png)
+
+
+### Gaussian Blur
+
+```go
+dstImage := imaging.Blur(srcImage, 0.5)
+```
+
+Sigma parameter allows to control the strength of the blurring effect.
+
+Original image                     | Sigma = 0.5                            | Sigma = 1.5
+-----------------------------------|----------------------------------------|---------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_blur_0.5.png) | ![dstImage](testdata/out_blur_1.5.png)
+
+### Sharpening
+
+```go
+dstImage := imaging.Sharpen(srcImage, 0.5)
+```
+
+`Sharpen` uses gaussian function internally. Sigma parameter allows to control the strength of the sharpening effect.
+
+Original image                     | Sigma = 0.5                               | Sigma = 1.5
+-----------------------------------|-------------------------------------------|------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_sharpen_0.5.png) | ![dstImage](testdata/out_sharpen_1.5.png)
+
+### Gamma correction
+
+```go
+dstImage := imaging.AdjustGamma(srcImage, 0.75)
+```
+
+Original image                     | Gamma = 0.75                             | Gamma = 1.25
+-----------------------------------|------------------------------------------|-----------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_gamma_0.75.png) | ![dstImage](testdata/out_gamma_1.25.png)
+
+### Contrast adjustment
+
+```go
+dstImage := imaging.AdjustContrast(srcImage, 20)
+```
+
+Original image                     | Contrast = 15                              | Contrast = -15
+-----------------------------------|--------------------------------------------|-------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_contrast_p15.png) | ![dstImage](testdata/out_contrast_m15.png)
+
+### Brightness adjustment
+
+```go
+dstImage := imaging.AdjustBrightness(srcImage, 20)
+```
+
+Original image                     | Brightness = 10                              | Brightness = -10
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_brightness_p10.png) | ![dstImage](testdata/out_brightness_m10.png)
+
+### Saturation adjustment
+
+```go
+dstImage := imaging.AdjustSaturation(srcImage, 20)
+```
+
+Original image                     | Saturation = 30                              | Saturation = -30
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_saturation_p30.png) | ![dstImage](testdata/out_saturation_m30.png)
+
+## FAQ
+
+### Incorrect image orientation after processing (e.g. an image appears rotated after resizing)
+
+Most probably, the given image contains the EXIF orientation tag.
+The stadard `image/*` packages do not support loading and saving
+this kind of information. To fix the issue, try opening images with
+the `AutoOrientation` decode option. If this option is set to `true`,
+the image orientation is changed after decoding, according to the
+orientation tag (if present). Here's the example:
+
+```go
+img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+```
+
+### What's the difference between `imaging` and `gift` packages?
+
+[imaging](https://github.com/disintegration/imaging)
+is designed to be a lightweight and simple image manipulation package.
+It provides basic image processing functions and a few helper functions
+such as `Open` and `Save`. It consistently returns *image.NRGBA image 
+type (8 bits per channel, RGBA).
+
+[gift](https://github.com/disintegration/gift)
+supports more advanced image processing, for example, sRGB/Linear color
+space conversions. It also supports different output image types
+(e.g. 16 bits per channel) and provides easy-to-use API for chaining
+multiple processing steps together.
+
+## Example code
+
+```go
+package main
+
+import (
+	"image"
+	"image/color"
+	"log"
+
+	"github.com/disintegration/imaging"
+)
+
+func main() {
+	// Open a test image.
+	src, err := imaging.Open("testdata/flowers.png")
+	if err != nil {
+		log.Fatalf("failed to open image: %v", err)
+	}
+
+	// Crop the original image to 300x300px size using the center anchor.
+	src = imaging.CropAnchor(src, 300, 300, imaging.Center)
+
+	// Resize the cropped image to width = 200px preserving the aspect ratio.
+	src = imaging.Resize(src, 200, 0, imaging.Lanczos)
+
+	// Create a blurred version of the image.
+	img1 := imaging.Blur(src, 5)
+
+	// Create a grayscale version of the image with higher contrast and sharpness.
+	img2 := imaging.Grayscale(src)
+	img2 = imaging.AdjustContrast(img2, 20)
+	img2 = imaging.Sharpen(img2, 2)
+
+	// Create an inverted version of the image.
+	img3 := imaging.Invert(src)
+
+	// Create an embossed version of the image using a convolution filter.
+	img4 := imaging.Convolve3x3(
+		src,
+		[9]float64{
+			-1, -1, 0,
+			-1, 1, 1,
+			0, 1, 1,
+		},
+		nil,
+	)
+
+	// Create a new image and paste the four produced images into it.
+	dst := imaging.New(400, 400, color.NRGBA{0, 0, 0, 0})
+	dst = imaging.Paste(dst, img1, image.Pt(0, 0))
+	dst = imaging.Paste(dst, img2, image.Pt(0, 200))
+	dst = imaging.Paste(dst, img3, image.Pt(200, 0))
+	dst = imaging.Paste(dst, img4, image.Pt(200, 200))
+
+	// Save the resulting image as JPEG.
+	err = imaging.Save(dst, "testdata/out_example.jpg")
+	if err != nil {
+		log.Fatalf("failed to save image: %v", err)
+	}
+}
+```
+
+Output:
+
+![dstImage](testdata/out_example.jpg)

vendor/github.com/disintegration/imaging/adjust.go

@@ -0,0 +1,253 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// Grayscale produces a grayscale version of the image.
+func Grayscale(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				f := 0.299*float64(r) + 0.587*float64(g) + 0.114*float64(b)
+				y := uint8(f + 0.5)
+				d[0] = y
+				d[1] = y
+				d[2] = y
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// Invert produces an inverted (negated) version of the image.
+func Invert(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = 255 - d[0]
+				d[1] = 255 - d[1]
+				d[2] = 255 - d[2]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustSaturation changes the saturation of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in the range (-100, 100).
+// The percentage = 0 gives the original image.
+// The percentage = 100 gives the image with the saturation value doubled for each pixel.
+// The percentage = -100 gives the image with the saturation value zeroed for each pixel (grayscale).
+//
+// Examples:
+//  dstImage = imaging.AdjustSaturation(srcImage, 25) // Increase image saturation by 25%.
+//  dstImage = imaging.AdjustSaturation(srcImage, -10) // Decrease image saturation by 10%.
+//
+func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100), 100)
+	multiplier := 1 + percentage/100
+
+	return AdjustFunc(img, func(c color.NRGBA) color.NRGBA {
+		h, s, l := rgbToHSL(c.R, c.G, c.B)
+		s *= multiplier
+		if s > 1 {
+			s = 1
+		}
+		r, g, b := hslToRGB(h, s, l)
+		return color.NRGBA{r, g, b, c.A}
+	})
+}
+
+// AdjustContrast changes the contrast of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid gray image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustContrast(srcImage, -10) // Decrease image contrast by 10%.
+//	dstImage = imaging.AdjustContrast(srcImage, 20) // Increase image contrast by 20%.
+//
+func AdjustContrast(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	v := (100.0 + percentage) / 100.0
+	for i := 0; i < 256; i++ {
+		switch {
+		case 0 <= v && v <= 1:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*v) * 255.0)
+		case 1 < v && v < 2:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*(1/(2.0-v))) * 255.0)
+		default:
+			lut[i] = uint8(float64(i)/255.0+0.5) * 255
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustBrightness changes the brightness of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid black image. The percentage = 100 gives solid white image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustBrightness(srcImage, -15) // Decrease image brightness by 15%.
+//	dstImage = imaging.AdjustBrightness(srcImage, 10) // Increase image brightness by 10%.
+//
+func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	shift := 255.0 * percentage / 100.0
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(float64(i) + shift)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustGamma performs a gamma correction on the image and returns the adjusted image.
+// Gamma parameter must be positive. Gamma = 1.0 gives the original image.
+// Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustGamma(srcImage, 0.7)
+//
+func AdjustGamma(img image.Image, gamma float64) *image.NRGBA {
+	e := 1.0 / math.Max(gamma, 0.0001)
+	lut := make([]uint8, 256)
+
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(math.Pow(float64(i)/255.0, e) * 255.0)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustSigmoid changes the contrast of the image using a sigmoidal function and returns the adjusted image.
+// It's a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.
+// The midpoint parameter is the midpoint of contrast that must be between 0 and 1, typically 0.5.
+// The factor parameter indicates how much to increase or decrease the contrast, typically in range (-10, 10).
+// If the factor parameter is positive the image contrast is increased otherwise the contrast is decreased.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, 3.0) // Increase the contrast.
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, -3.0) // Decrease the contrast.
+//
+func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA {
+	if factor == 0 {
+		return Clone(img)
+	}
+
+	lut := make([]uint8, 256)
+	a := math.Min(math.Max(midpoint, 0.0), 1.0)
+	b := math.Abs(factor)
+	sig0 := sigmoid(a, b, 0)
+	sig1 := sigmoid(a, b, 1)
+	e := 1.0e-6
+
+	if factor > 0 {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			sigX := sigmoid(a, b, x)
+			f := (sigX - sig0) / (sig1 - sig0)
+			lut[i] = clamp(f * 255.0)
+		}
+	} else {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			arg := math.Min(math.Max((sig1-sig0)*x+sig0, e), 1.0-e)
+			f := a - math.Log(1.0/arg-1.0)/b
+			lut[i] = clamp(f * 255.0)
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+func sigmoid(a, b, x float64) float64 {
+	return 1 / (1 + math.Exp(b*(a-x)))
+}
+
+// adjustLUT applies the given lookup table to the colors of the image.
+func adjustLUT(img image.Image, lut []uint8) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	lut = lut[0:256]
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = lut[d[0]]
+				d[1] = lut[d[1]]
+				d[2] = lut[d[2]]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustFunc applies the fn function to each pixel of the img image and returns the adjusted image.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustFunc(
+//		srcImage,
+//		func(c color.NRGBA) color.NRGBA {
+//			// Shift the red channel by 16.
+//			r := int(c.R) + 16
+//			if r > 255 {
+//				r = 255
+//			}
+//			return color.NRGBA{uint8(r), c.G, c.B, c.A}
+//		}
+//	)
+//
+func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				a := d[3]
+				c := fn(color.NRGBA{r, g, b, a})
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				i += 4
+			}
+		}
+	})
+	return dst
+}

vendor/github.com/disintegration/imaging/convolution.go

@@ -0,0 +1,148 @@
+package imaging
+
+import (
+	"image"
+)
+
+// ConvolveOptions are convolution parameters.
+type ConvolveOptions struct {
+	// If Normalize is true the kernel is normalized before convolution.
+	Normalize bool
+
+	// If Abs is true the absolute value of each color channel is taken after convolution.
+	Abs bool
+
+	// Bias is added to each color channel value after convolution.
+	Bias int
+}
+
+// Convolve3x3 convolves the image with the specified 3x3 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+// Convolve5x5 convolves the image with the specified 5x5 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+func convolve(img image.Image, kernel []float64, options *ConvolveOptions) *image.NRGBA {
+	src := toNRGBA(img)
+	w := src.Bounds().Max.X
+	h := src.Bounds().Max.Y
+	dst := image.NewNRGBA(image.Rect(0, 0, w, h))
+
+	if w < 1 || h < 1 {
+		return dst
+	}
+
+	if options == nil {
+		options = &ConvolveOptions{}
+	}
+
+	if options.Normalize {
+		normalizeKernel(kernel)
+	}
+
+	type coef struct {
+		x, y int
+		k    float64
+	}
+	var coefs []coef
+	var m int
+
+	switch len(kernel) {
+	case 9:
+		m = 1
+	case 25:
+		m = 2
+	}
+
+	i := 0
+	for y := -m; y <= m; y++ {
+		for x := -m; x <= m; x++ {
+			if kernel[i] != 0 {
+				coefs = append(coefs, coef{x: x, y: y, k: kernel[i]})
+			}
+			i++
+		}
+	}
+
+	parallel(0, h, func(ys <-chan int) {
+		for y := range ys {
+			for x := 0; x < w; x++ {
+				var r, g, b float64
+				for _, c := range coefs {
+					ix := x + c.x
+					if ix < 0 {
+						ix = 0
+					} else if ix >= w {
+						ix = w - 1
+					}
+
+					iy := y + c.y
+					if iy < 0 {
+						iy = 0
+					} else if iy >= h {
+						iy = h - 1
+					}
+
+					off := iy*src.Stride + ix*4
+					s := src.Pix[off : off+3 : off+3]
+					r += float64(s[0]) * c.k
+					g += float64(s[1]) * c.k
+					b += float64(s[2]) * c.k
+				}
+
+				if options.Abs {
+					if r < 0 {
+						r = -r
+					}
+					if g < 0 {
+						g = -g
+					}
+					if b < 0 {
+						b = -b
+					}
+				}
+
+				if options.Bias != 0 {
+					r += float64(options.Bias)
+					g += float64(options.Bias)
+					b += float64(options.Bias)
+				}
+
+				srcOff := y*src.Stride + x*4
+				dstOff := y*dst.Stride + x*4
+				d := dst.Pix[dstOff : dstOff+4 : dstOff+4]
+				d[0] = clamp(r)
+				d[1] = clamp(g)
+				d[2] = clamp(b)
+				d[3] = src.Pix[srcOff+3]
+			}
+		}
+	})
+
+	return dst
+}
+
+func normalizeKernel(kernel []float64) {
+	var sum, sumpos float64
+	for i := range kernel {
+		sum += kernel[i]
+		if kernel[i] > 0 {
+			sumpos += kernel[i]
+		}
+	}
+	if sum != 0 {
+		for i := range kernel {
+			kernel[i] /= sum
+		}
+	} else if sumpos != 0 {
+		for i := range kernel {
+			kernel[i] /= sumpos
+		}
+	}
+}

vendor/github.com/disintegration/imaging/doc.go

@@ -0,0 +1,7 @@
+/*
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements image.Image interface
+as an input, and return a new image of *image.NRGBA type (32bit RGBA colors, non-premultiplied alpha).
+*/
+package imaging

vendor/github.com/disintegration/imaging/effects.go

@@ -0,0 +1,169 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+func gaussianBlurKernel(x, sigma float64) float64 {
+	return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi))
+}
+
+// Blur produces a blurred version of the image using a Gaussian function.
+// Sigma parameter must be positive and indicates how much the image will be blurred.
+//
+// Example:
+//
+//	dstImage := imaging.Blur(srcImage, 3.5)
+//
+func Blur(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	radius := int(math.Ceil(sigma * 3.0))
+	kernel := make([]float64, radius+1)
+
+	for i := 0; i <= radius; i++ {
+		kernel[i] = gaussianBlurKernel(float64(i), sigma)
+	}
+
+	return blurVertical(blurHorizontal(img, kernel), kernel)
+}
+
+func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		scanLineF := make([]float64, len(scanLine))
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for x := 0; x < src.w; x++ {
+				min := x - radius
+				if min < 0 {
+					min = 0
+				}
+				max := x + radius
+				if max > src.w-1 {
+					max = src.w - 1
+				}
+				var r, g, b, a, wsum float64
+				for ix := min; ix <= max; ix++ {
+					i := ix * 4
+					weight := kernel[absint(x-ix)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		scanLineF := make([]float64, len(scanLine))
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for y := 0; y < src.h; y++ {
+				min := y - radius
+				if min < 0 {
+					min = 0
+				}
+				max := y + radius
+				if max > src.h-1 {
+					max = src.h - 1
+				}
+				var r, g, b, a, wsum float64
+				for iy := min; iy <= max; iy++ {
+					i := iy * 4
+					weight := kernel[absint(y-iy)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+// Sharpen produces a sharpened version of the image.
+// Sigma parameter must be positive and indicates how much the image will be sharpened.
+//
+// Example:
+//
+//	dstImage := imaging.Sharpen(srcImage, 3.5)
+//
+func Sharpen(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	blurred := Blur(img, sigma)
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j := y * dst.Stride
+			for i := 0; i < src.w*4; i++ {
+				val := int(scanLine[i])<<1 - int(blurred.Pix[j])
+				if val < 0 {
+					val = 0
+				} else if val > 0xff {
+					val = 0xff
+				}
+				dst.Pix[j] = uint8(val)
+				j++
+			}
+		}
+	})
+
+	return dst
+}

vendor/github.com/disintegration/imaging/histogram.go

@@ -0,0 +1,52 @@
+package imaging
+
+import (
+	"image"
+	"sync"
+)
+
+// Histogram returns a normalized histogram of an image.
+//
+// Resulting histogram is represented as an array of 256 floats, where
+// histogram[i] is a probability of a pixel being of a particular luminance i.
+func Histogram(img image.Image) [256]float64 {
+	var mu sync.Mutex
+	var histogram [256]float64
+	var total float64
+
+	src := newScanner(img)
+	if src.w == 0 || src.h == 0 {
+		return histogram
+	}
+
+	parallel(0, src.h, func(ys <-chan int) {
+		var tmpHistogram [256]float64
+		var tmpTotal float64
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			i := 0
+			for x := 0; x < src.w; x++ {
+				s := scanLine[i : i+3 : i+3]
+				r := s[0]
+				g := s[1]
+				b := s[2]
+				y := 0.299*float32(r) + 0.587*float32(g) + 0.114*float32(b)
+				tmpHistogram[int(y+0.5)]++
+				tmpTotal++
+				i += 4
+			}
+		}
+		mu.Lock()
+		for i := 0; i < 256; i++ {
+			histogram[i] += tmpHistogram[i]
+		}
+		total += tmpTotal
+		mu.Unlock()
+	})
+
+	for i := 0; i < 256; i++ {
+		histogram[i] = histogram[i] / total
+	}
+	return histogram
+}

vendor/github.com/disintegration/imaging/io.go

@@ -0,0 +1,444 @@
+package imaging
+
+import (
+	"encoding/binary"
+	"errors"
+	"image"
+	"image/draw"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/image/bmp"
+	"golang.org/x/image/tiff"
+)
+
+type fileSystem interface {
+	Create(string) (io.WriteCloser, error)
+	Open(string) (io.ReadCloser, error)
+}
+
+type localFS struct{}
+
+func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) }
+func (localFS) Open(name string) (io.ReadCloser, error)    { return os.Open(name) }
+
+var fs fileSystem = localFS{}
+
+type decodeConfig struct {
+	autoOrientation bool
+}
+
+var defaultDecodeConfig = decodeConfig{
+	autoOrientation: false,
+}
+
+// DecodeOption sets an optional parameter for the Decode and Open functions.
+type DecodeOption func(*decodeConfig)
+
+// AutoOrientation returns a DecodeOption that sets the auto-orientation mode.
+// If auto-orientation is enabled, the image will be transformed after decoding
+// according to the EXIF orientation tag (if present). By default it's disabled.
+func AutoOrientation(enabled bool) DecodeOption {
+	return func(c *decodeConfig) {
+		c.autoOrientation = enabled
+	}
+}
+
+// Decode reads an image from r.
+func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error) {
+	cfg := defaultDecodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	if !cfg.autoOrientation {
+		img, _, err := image.Decode(r)
+		return img, err
+	}
+
+	var orient orientation
+	pr, pw := io.Pipe()
+	r = io.TeeReader(r, pw)
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		orient = readOrientation(pr)
+		io.Copy(ioutil.Discard, pr)
+	}()
+
+	img, _, err := image.Decode(r)
+	pw.Close()
+	<-done
+	if err != nil {
+		return nil, err
+	}
+
+	return fixOrientation(img, orient), nil
+}
+
+// Open loads an image from file.
+//
+// Examples:
+//
+//	// Load an image from file.
+//	img, err := imaging.Open("test.jpg")
+//
+//	// Load an image and transform it depending on the EXIF orientation tag (if present).
+//	img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+//
+func Open(filename string, opts ...DecodeOption) (image.Image, error) {
+	file, err := fs.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return Decode(file, opts...)
+}
+
+// Format is an image file format.
+type Format int
+
+// Image file formats.
+const (
+	JPEG Format = iota
+	PNG
+	GIF
+	TIFF
+	BMP
+)
+
+var formatExts = map[string]Format{
+	"jpg":  JPEG,
+	"jpeg": JPEG,
+	"png":  PNG,
+	"gif":  GIF,
+	"tif":  TIFF,
+	"tiff": TIFF,
+	"bmp":  BMP,
+}
+
+var formatNames = map[Format]string{
+	JPEG: "JPEG",
+	PNG:  "PNG",
+	GIF:  "GIF",
+	TIFF: "TIFF",
+	BMP:  "BMP",
+}
+
+func (f Format) String() string {
+	return formatNames[f]
+}
+
+// ErrUnsupportedFormat means the given image format is not supported.
+var ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
+
+// FormatFromExtension parses image format from filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromExtension(ext string) (Format, error) {
+	if f, ok := formatExts[strings.ToLower(strings.TrimPrefix(ext, "."))]; ok {
+		return f, nil
+	}
+	return -1, ErrUnsupportedFormat
+}
+
+// FormatFromFilename parses image format from filename:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromFilename(filename string) (Format, error) {
+	ext := filepath.Ext(filename)
+	return FormatFromExtension(ext)
+}
+
+type encodeConfig struct {
+	jpegQuality         int
+	gifNumColors        int
+	gifQuantizer        draw.Quantizer
+	gifDrawer           draw.Drawer
+	pngCompressionLevel png.CompressionLevel
+}
+
+var defaultEncodeConfig = encodeConfig{
+	jpegQuality:         95,
+	gifNumColors:        256,
+	gifQuantizer:        nil,
+	gifDrawer:           nil,
+	pngCompressionLevel: png.DefaultCompression,
+}
+
+// EncodeOption sets an optional parameter for the Encode and Save functions.
+type EncodeOption func(*encodeConfig)
+
+// JPEGQuality returns an EncodeOption that sets the output JPEG quality.
+// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95.
+func JPEGQuality(quality int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.jpegQuality = quality
+	}
+}
+
+// GIFNumColors returns an EncodeOption that sets the maximum number of colors
+// used in the GIF-encoded image. It ranges from 1 to 256.  Default is 256.
+func GIFNumColors(numColors int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifNumColors = numColors
+	}
+}
+
+// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce
+// a palette of the GIF-encoded image.
+func GIFQuantizer(quantizer draw.Quantizer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifQuantizer = quantizer
+	}
+}
+
+// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert
+// the source image to the desired palette of the GIF-encoded image.
+func GIFDrawer(drawer draw.Drawer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifDrawer = drawer
+	}
+}
+
+// PNGCompressionLevel returns an EncodeOption that sets the compression level
+// of the PNG-encoded image. Default is png.DefaultCompression.
+func PNGCompressionLevel(level png.CompressionLevel) EncodeOption {
+	return func(c *encodeConfig) {
+		c.pngCompressionLevel = level
+	}
+}
+
+// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
+func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error {
+	cfg := defaultEncodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	switch format {
+	case JPEG:
+		if nrgba, ok := img.(*image.NRGBA); ok && nrgba.Opaque() {
+			rgba := &image.RGBA{
+				Pix:    nrgba.Pix,
+				Stride: nrgba.Stride,
+				Rect:   nrgba.Rect,
+			}
+			return jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality})
+		}
+		return jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality})
+
+	case PNG:
+		encoder := png.Encoder{CompressionLevel: cfg.pngCompressionLevel}
+		return encoder.Encode(w, img)
+
+	case GIF:
+		return gif.Encode(w, img, &gif.Options{
+			NumColors: cfg.gifNumColors,
+			Quantizer: cfg.gifQuantizer,
+			Drawer:    cfg.gifDrawer,
+		})
+
+	case TIFF:
+		return tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
+
+	case BMP:
+		return bmp.Encode(w, img)
+	}
+
+	return ErrUnsupportedFormat
+}
+
+// Save saves the image to file with the specified filename.
+// The format is determined from the filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+//
+// Examples:
+//
+//	// Save the image as PNG.
+//	err := imaging.Save(img, "out.png")
+//
+//	// Save the image as JPEG with optional quality parameter set to 80.
+//	err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80))
+//
+func Save(img image.Image, filename string, opts ...EncodeOption) (err error) {
+	f, err := FormatFromFilename(filename)
+	if err != nil {
+		return err
+	}
+	file, err := fs.Create(filename)
+	if err != nil {
+		return err
+	}
+	err = Encode(file, img, f, opts...)
+	errc := file.Close()
+	if err == nil {
+		err = errc
+	}
+	return err
+}
+
+// orientation is an EXIF flag that specifies the transformation
+// that should be applied to image to display it correctly.
+type orientation int
+
+const (
+	orientationUnspecified = 0
+	orientationNormal      = 1
+	orientationFlipH       = 2
+	orientationRotate180   = 3
+	orientationFlipV       = 4
+	orientationTranspose   = 5
+	orientationRotate270   = 6
+	orientationTransverse  = 7
+	orientationRotate90    = 8
+)
+
+// readOrientation tries to read the orientation EXIF flag from image data in r.
+// If the EXIF data block is not found or the orientation flag is not found
+// or any other error occures while reading the data, it returns the
+// orientationUnspecified (0) value.
+func readOrientation(r io.Reader) orientation {
+	const (
+		markerSOI      = 0xffd8
+		markerAPP1     = 0xffe1
+		exifHeader     = 0x45786966
+		byteOrderBE    = 0x4d4d
+		byteOrderLE    = 0x4949
+		orientationTag = 0x0112
+	)
+
+	// Check if JPEG SOI marker is present.
+	var soi uint16
+	if err := binary.Read(r, binary.BigEndian, &soi); err != nil {
+		return orientationUnspecified
+	}
+	if soi != markerSOI {
+		return orientationUnspecified // Missing JPEG SOI marker.
+	}
+
+	// Find JPEG APP1 marker.
+	for {
+		var marker, size uint16
+		if err := binary.Read(r, binary.BigEndian, &marker); err != nil {
+			return orientationUnspecified
+		}
+		if err := binary.Read(r, binary.BigEndian, &size); err != nil {
+			return orientationUnspecified
+		}
+		if marker>>8 != 0xff {
+			return orientationUnspecified // Invalid JPEG marker.
+		}
+		if marker == markerAPP1 {
+			break
+		}
+		if size < 2 {
+			return orientationUnspecified // Invalid block size.
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, int64(size-2)); err != nil {
+			return orientationUnspecified
+		}
+	}
+
+	// Check if EXIF header is present.
+	var header uint32
+	if err := binary.Read(r, binary.BigEndian, &header); err != nil {
+		return orientationUnspecified
+	}
+	if header != exifHeader {
+		return orientationUnspecified
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read byte order information.
+	var (
+		byteOrderTag uint16
+		byteOrder    binary.ByteOrder
+	)
+	if err := binary.Read(r, binary.BigEndian, &byteOrderTag); err != nil {
+		return orientationUnspecified
+	}
+	switch byteOrderTag {
+	case byteOrderBE:
+		byteOrder = binary.BigEndian
+	case byteOrderLE:
+		byteOrder = binary.LittleEndian
+	default:
+		return orientationUnspecified // Invalid byte order flag.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Skip the EXIF offset.
+	var offset uint32
+	if err := binary.Read(r, byteOrder, &offset); err != nil {
+		return orientationUnspecified
+	}
+	if offset < 8 {
+		return orientationUnspecified // Invalid offset value.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, int64(offset-8)); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read the number of tags.
+	var numTags uint16
+	if err := binary.Read(r, byteOrder, &numTags); err != nil {
+		return orientationUnspecified
+	}
+
+	// Find the orientation tag.
+	for i := 0; i < int(numTags); i++ {
+		var tag uint16
+		if err := binary.Read(r, byteOrder, &tag); err != nil {
+			return orientationUnspecified
+		}
+		if tag != orientationTag {
+			if _, err := io.CopyN(ioutil.Discard, r, 10); err != nil {
+				return orientationUnspecified
+			}
+			continue
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, 6); err != nil {
+			return orientationUnspecified
+		}
+		var val uint16
+		if err := binary.Read(r, byteOrder, &val); err != nil {
+			return orientationUnspecified
+		}
+		if val < 1 || val > 8 {
+			return orientationUnspecified // Invalid tag value.
+		}
+		return orientation(val)
+	}
+	return orientationUnspecified // Missing orientation tag.
+}
+
+// fixOrientation applies a transform to img corresponding to the given orientation flag.
+func fixOrientation(img image.Image, o orientation) image.Image {
+	switch o {
+	case orientationNormal:
+	case orientationFlipH:
+		img = FlipH(img)
+	case orientationFlipV:
+		img = FlipV(img)
+	case orientationRotate90:
+		img = Rotate90(img)
+	case orientationRotate180:
+		img = Rotate180(img)
+	case orientationRotate270:
+		img = Rotate270(img)
+	case orientationTranspose:
+		img = Transpose(img)
+	case orientationTransverse:
+		img = Transverse(img)
+	}
+	return img
+}

vendor/github.com/disintegration/imaging/resize.go

@@ -0,0 +1,595 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+type indexWeight struct {
+	index  int
+	weight float64
+}
+
+func precomputeWeights(dstSize, srcSize int, filter ResampleFilter) [][]indexWeight {
+	du := float64(srcSize) / float64(dstSize)
+	scale := du
+	if scale < 1.0 {
+		scale = 1.0
+	}
+	ru := math.Ceil(scale * filter.Support)
+
+	out := make([][]indexWeight, dstSize)
+	tmp := make([]indexWeight, 0, dstSize*int(ru+2)*2)
+
+	for v := 0; v < dstSize; v++ {
+		fu := (float64(v)+0.5)*du - 0.5
+
+		begin := int(math.Ceil(fu - ru))
+		if begin < 0 {
+			begin = 0
+		}
+		end := int(math.Floor(fu + ru))
+		if end > srcSize-1 {
+			end = srcSize - 1
+		}
+
+		var sum float64
+		for u := begin; u <= end; u++ {
+			w := filter.Kernel((float64(u) - fu) / scale)
+			if w != 0 {
+				sum += w
+				tmp = append(tmp, indexWeight{index: u, weight: w})
+			}
+		}
+		if sum != 0 {
+			for i := range tmp {
+				tmp[i].weight /= sum
+			}
+		}
+
+		out[v] = tmp
+		tmp = tmp[len(tmp):]
+	}
+
+	return out
+}
+
+// Resize resizes the image to the specified width and height using the specified resampling
+// filter and returns the transformed image. If one of width or height is 0, the image aspect
+// ratio is preserved.
+//
+// Example:
+//
+//	dstImage := imaging.Resize(srcImage, 800, 600, imaging.Lanczos)
+//
+func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+	if dstW < 0 || dstH < 0 {
+		return &image.NRGBA{}
+	}
+	if dstW == 0 && dstH == 0 {
+		return &image.NRGBA{}
+	}
+
+	srcW := img.Bounds().Dx()
+	srcH := img.Bounds().Dy()
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	// If new width or height is 0 then preserve aspect ratio, minimum 1px.
+	if dstW == 0 {
+		tmpW := float64(dstH) * float64(srcW) / float64(srcH)
+		dstW = int(math.Max(1.0, math.Floor(tmpW+0.5)))
+	}
+	if dstH == 0 {
+		tmpH := float64(dstW) * float64(srcH) / float64(srcW)
+		dstH = int(math.Max(1.0, math.Floor(tmpH+0.5)))
+	}
+
+	if filter.Support <= 0 {
+		// Nearest-neighbor special case.
+		return resizeNearest(img, dstW, dstH)
+	}
+
+	if srcW != dstW && srcH != dstH {
+		return resizeVertical(resizeHorizontal(img, dstW, filter), dstH, filter)
+	}
+	if srcW != dstW {
+		return resizeHorizontal(img, dstW, filter)
+	}
+	if srcH != dstH {
+		return resizeVertical(img, dstH, filter)
+	}
+	return Clone(img)
+}
+
+func resizeHorizontal(img image.Image, width int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, width, src.h))
+	weights := precomputeWeights(width, src.w, filter)
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j0 := y * dst.Stride
+			for x := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[x] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := j0 + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+func resizeVertical(img image.Image, height int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, height))
+	weights := precomputeWeights(height, src.h, filter)
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for y := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[y] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+// resizeNearest is a fast nearest-neighbor resize, no filtering.
+func resizeNearest(img image.Image, width, height int) *image.NRGBA {
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+	dx := float64(img.Bounds().Dx()) / float64(width)
+	dy := float64(img.Bounds().Dy()) / float64(height)
+
+	if dx > 1 && dy > 1 {
+		src := newScanner(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					src.scan(srcX, srcY, srcX+1, srcY+1, dst.Pix[dstOff:dstOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	} else {
+		src := toNRGBA(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				srcOff0 := srcY * src.Stride
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					srcOff := srcOff0 + srcX*4
+					copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	}
+
+	return dst
+}
+
+// Fit scales down the image using the specified resample filter to fit the specified
+// maximum width and height and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+//
+func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	maxW, maxH := width, height
+
+	if maxW <= 0 || maxH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW <= maxW && srcH <= maxH {
+		return Clone(img)
+	}
+
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	maxAspectRatio := float64(maxW) / float64(maxH)
+
+	var newW, newH int
+	if srcAspectRatio > maxAspectRatio {
+		newW = maxW
+		newH = int(float64(newW) / srcAspectRatio)
+	} else {
+		newH = maxH
+		newW = int(float64(newH) * srcAspectRatio)
+	}
+
+	return Resize(img, newW, newH, filter)
+}
+
+// Fill creates an image with the specified dimensions and fills it with the scaled source image.
+// To achieve the correct aspect ratio without stretching, the source image will be cropped.
+//
+// Example:
+//
+//	dstImage := imaging.Fill(srcImage, 800, 600, imaging.Center, imaging.Lanczos)
+//
+func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	if dstW <= 0 || dstH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW == dstW && srcH == dstH {
+		return Clone(img)
+	}
+
+	if srcW >= 100 && srcH >= 100 {
+		return cropAndResize(img, dstW, dstH, anchor, filter)
+	}
+	return resizeAndCrop(img, dstW, dstH, anchor, filter)
+}
+
+// cropAndResize crops the image to the smallest possible size that has the required aspect ratio using
+// the given anchor point, then scales it to the specified dimensions and returns the transformed image.
+//
+// This is generally faster than resizing first, but may result in inaccuracies when used on small source images.
+func cropAndResize(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		cropH := float64(srcW) * float64(dstH) / float64(dstW)
+		tmp = CropAnchor(img, srcW, int(math.Max(1, cropH)+0.5), anchor)
+	} else {
+		cropW := float64(srcH) * float64(dstW) / float64(dstH)
+		tmp = CropAnchor(img, int(math.Max(1, cropW)+0.5), srcH, anchor)
+	}
+
+	return Resize(tmp, dstW, dstH, filter)
+}
+
+// resizeAndCrop resizes the image to the smallest possible size that will cover the specified dimensions,
+// crops the resized image to the specified dimensions using the given anchor point and returns
+// the transformed image.
+func resizeAndCrop(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		tmp = Resize(img, dstW, 0, filter)
+	} else {
+		tmp = Resize(img, 0, dstH, filter)
+	}
+
+	return CropAnchor(tmp, dstW, dstH, anchor)
+}
+
+// Thumbnail scales the image up or down using the specified resample filter, crops it
+// to the specified width and hight and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos)
+//
+func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	return Fill(img, width, height, Center, filter)
+}
+
+// ResampleFilter specifies a resampling filter to be used for image resizing.
+//
+//	General filter recommendations:
+//
+//	- Lanczos
+//		A high-quality resampling filter for photographic images yielding sharp results.
+//
+//	- CatmullRom
+//		A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+//
+//	- MitchellNetravali
+//		A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+//
+//	- Linear
+//		Bilinear resampling filter, produces a smooth output. Faster than cubic filters.
+//
+//	- Box
+//		Simple and fast averaging filter appropriate for downscaling.
+//		When upscaling it's similar to NearestNeighbor.
+//
+//	- NearestNeighbor
+//		Fastest resampling filter, no antialiasing.
+//
+type ResampleFilter struct {
+	Support float64
+	Kernel  func(float64) float64
+}
+
+// NearestNeighbor is a nearest-neighbor filter (no anti-aliasing).
+var NearestNeighbor ResampleFilter
+
+// Box filter (averaging pixels).
+var Box ResampleFilter
+
+// Linear filter.
+var Linear ResampleFilter
+
+// Hermite cubic spline filter (BC-spline; B=0; C=0).
+var Hermite ResampleFilter
+
+// MitchellNetravali is Mitchell-Netravali cubic filter (BC-spline; B=1/3; C=1/3).
+var MitchellNetravali ResampleFilter
+
+// CatmullRom is a Catmull-Rom - sharp cubic filter (BC-spline; B=0; C=0.5).
+var CatmullRom ResampleFilter
+
+// BSpline is a smooth cubic filter (BC-spline; B=1; C=0).
+var BSpline ResampleFilter
+
+// Gaussian is a Gaussian blurring filter.
+var Gaussian ResampleFilter
+
+// Bartlett is a Bartlett-windowed sinc filter (3 lobes).
+var Bartlett ResampleFilter
+
+// Lanczos filter (3 lobes).
+var Lanczos ResampleFilter
+
+// Hann is a Hann-windowed sinc filter (3 lobes).
+var Hann ResampleFilter
+
+// Hamming is a Hamming-windowed sinc filter (3 lobes).
+var Hamming ResampleFilter
+
+// Blackman is a Blackman-windowed sinc filter (3 lobes).
+var Blackman ResampleFilter
+
+// Welch is a Welch-windowed sinc filter (parabolic window, 3 lobes).
+var Welch ResampleFilter
+
+// Cosine is a Cosine-windowed sinc filter (3 lobes).
+var Cosine ResampleFilter
+
+func bcspline(x, b, c float64) float64 {
+	var y float64
+	x = math.Abs(x)
+	if x < 1.0 {
+		y = ((12-9*b-6*c)*x*x*x + (-18+12*b+6*c)*x*x + (6 - 2*b)) / 6
+	} else if x < 2.0 {
+		y = ((-b-6*c)*x*x*x + (6*b+30*c)*x*x + (-12*b-48*c)*x + (8*b + 24*c)) / 6
+	}
+	return y
+}
+
+func sinc(x float64) float64 {
+	if x == 0 {
+		return 1
+	}
+	return math.Sin(math.Pi*x) / (math.Pi * x)
+}
+
+func init() {
+	NearestNeighbor = ResampleFilter{
+		Support: 0.0, // special case - not applying the filter
+	}
+
+	Box = ResampleFilter{
+		Support: 0.5,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x <= 0.5 {
+				return 1.0
+			}
+			return 0
+		},
+	}
+
+	Linear = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return 1.0 - x
+			}
+			return 0
+		},
+	}
+
+	Hermite = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return bcspline(x, 0.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	MitchellNetravali = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0/3.0, 1.0/3.0)
+			}
+			return 0
+		},
+	}
+
+	CatmullRom = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 0.0, 0.5)
+			}
+			return 0
+		},
+	}
+
+	BSpline = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	Gaussian = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return math.Exp(-2 * x * x)
+			}
+			return 0
+		},
+	}
+
+	Bartlett = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (3.0 - x) / 3.0
+			}
+			return 0
+		},
+	}
+
+	Lanczos = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * sinc(x/3.0)
+			}
+			return 0
+		},
+	}
+
+	Hann = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.5 + 0.5*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Hamming = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.54 + 0.46*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Blackman = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.42 - 0.5*math.Cos(math.Pi*x/3.0+math.Pi) + 0.08*math.Cos(2.0*math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Welch = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (1.0 - (x * x / 9.0))
+			}
+			return 0
+		},
+	}
+
+	Cosine = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * math.Cos((math.Pi/2.0)*(x/3.0))
+			}
+			return 0
+		},
+	}
+}

vendor/github.com/disintegration/imaging/scanner.go

@@ -0,0 +1,285 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+)
+
+type scanner struct {
+	image   image.Image
+	w, h    int
+	palette []color.NRGBA
+}
+
+func newScanner(img image.Image) *scanner {
+	s := &scanner{
+		image: img,
+		w:     img.Bounds().Dx(),
+		h:     img.Bounds().Dy(),
+	}
+	if img, ok := img.(*image.Paletted); ok {
+		s.palette = make([]color.NRGBA, len(img.Palette))
+		for i := 0; i < len(img.Palette); i++ {
+			s.palette[i] = color.NRGBAModel.Convert(img.Palette[i]).(color.NRGBA)
+		}
+	}
+	return s
+}
+
+// scan scans the given rectangular region of the image into dst.
+func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
+	switch img := s.image.(type) {
+	case *image.NRGBA:
+		size := (x2 - x1) * 4
+		j := 0
+		i := y1*img.Stride + x1*4
+		if size == 4 {
+			for y := y1; y < y2; y++ {
+				d := dst[j : j+4 : j+4]
+				s := img.Pix[i : i+4 : i+4]
+				d[0] = s[0]
+				d[1] = s[1]
+				d[2] = s[2]
+				d[3] = s[3]
+				j += size
+				i += img.Stride
+			}
+		} else {
+			for y := y1; y < y2; y++ {
+				copy(dst[j:j+size], img.Pix[i:i+size])
+				j += size
+				i += img.Stride
+			}
+		}
+
+	case *image.NRGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				d[0] = s[0]
+				d[1] = s[2]
+				d[2] = s[4]
+				d[3] = s[6]
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.RGBA:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*4
+			for x := x1; x < x2; x++ {
+				d := dst[j : j+4 : j+4]
+				a := img.Pix[i+3]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = a
+				case 0xff:
+					s := img.Pix[i : i+4 : i+4]
+					d[0] = s[0]
+					d[1] = s[1]
+					d[2] = s[2]
+					d[3] = a
+				default:
+					s := img.Pix[i : i+4 : i+4]
+					r16 := uint16(s[0])
+					g16 := uint16(s[1])
+					b16 := uint16(s[2])
+					a16 := uint16(a)
+					d[0] = uint8(r16 * 0xff / a16)
+					d[1] = uint8(g16 * 0xff / a16)
+					d[2] = uint8(b16 * 0xff / a16)
+					d[3] = a
+				}
+				j += 4
+				i += 4
+			}
+		}
+
+	case *image.RGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				a := s[6]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+				case 0xff:
+					d[0] = s[0]
+					d[1] = s[2]
+					d[2] = s[4]
+				default:
+					r32 := uint32(s[0])<<8 | uint32(s[1])
+					g32 := uint32(s[2])<<8 | uint32(s[3])
+					b32 := uint32(s[4])<<8 | uint32(s[5])
+					a32 := uint32(s[6])<<8 | uint32(s[7])
+					d[0] = uint8((r32 * 0xffff / a32) >> 8)
+					d[1] = uint8((g32 * 0xffff / a32) >> 8)
+					d[2] = uint8((b32 * 0xffff / a32) >> 8)
+				}
+				d[3] = a
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.Gray:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i++
+			}
+		}
+
+	case *image.Gray16:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*2
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i += 2
+			}
+		}
+
+	case *image.YCbCr:
+		j := 0
+		x1 += img.Rect.Min.X
+		x2 += img.Rect.Min.X
+		y1 += img.Rect.Min.Y
+		y2 += img.Rect.Min.Y
+
+		hy := img.Rect.Min.Y / 2
+		hx := img.Rect.Min.X / 2
+		for y := y1; y < y2; y++ {
+			iy := (y-img.Rect.Min.Y)*img.YStride + (x1 - img.Rect.Min.X)
+
+			var yBase int
+			switch img.SubsampleRatio {
+			case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio422:
+				yBase = (y - img.Rect.Min.Y) * img.CStride
+			case image.YCbCrSubsampleRatio420, image.YCbCrSubsampleRatio440:
+				yBase = (y/2 - hy) * img.CStride
+			}
+
+			for x := x1; x < x2; x++ {
+				var ic int
+				switch img.SubsampleRatio {
+				case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio440:
+					ic = yBase + (x - img.Rect.Min.X)
+				case image.YCbCrSubsampleRatio422, image.YCbCrSubsampleRatio420:
+					ic = yBase + (x/2 - hx)
+				default:
+					ic = img.COffset(x, y)
+				}
+
+				yy1 := int32(img.Y[iy]) * 0x10101
+				cb1 := int32(img.Cb[ic]) - 128
+				cr1 := int32(img.Cr[ic]) - 128
+
+				r := yy1 + 91881*cr1
+				if uint32(r)&0xff000000 == 0 {
+					r >>= 16
+				} else {
+					r = ^(r >> 31)
+				}
+
+				g := yy1 - 22554*cb1 - 46802*cr1
+				if uint32(g)&0xff000000 == 0 {
+					g >>= 16
+				} else {
+					g = ^(g >> 31)
+				}
+
+				b := yy1 + 116130*cb1
+				if uint32(b)&0xff000000 == 0 {
+					b >>= 16
+				} else {
+					b = ^(b >> 31)
+				}
+
+				d := dst[j : j+4 : j+4]
+				d[0] = uint8(r)
+				d[1] = uint8(g)
+				d[2] = uint8(b)
+				d[3] = 0xff
+
+				iy++
+				j += 4
+			}
+		}
+
+	case *image.Paletted:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := s.palette[img.Pix[i]]
+				d := dst[j : j+4 : j+4]
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				j += 4
+				i++
+			}
+		}
+
+	default:
+		j := 0
+		b := s.image.Bounds()
+		x1 += b.Min.X
+		x2 += b.Min.X
+		y1 += b.Min.Y
+		y2 += b.Min.Y
+		for y := y1; y < y2; y++ {
+			for x := x1; x < x2; x++ {
+				r16, g16, b16, a16 := s.image.At(x, y).RGBA()
+				d := dst[j : j+4 : j+4]
+				switch a16 {
+				case 0xffff:
+					d[0] = uint8(r16 >> 8)
+					d[1] = uint8(g16 >> 8)
+					d[2] = uint8(b16 >> 8)
+					d[3] = 0xff
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = 0
+				default:
+					d[0] = uint8(((r16 * 0xffff) / a16) >> 8)
+					d[1] = uint8(((g16 * 0xffff) / a16) >> 8)
+					d[2] = uint8(((b16 * 0xffff) / a16) >> 8)
+					d[3] = uint8(a16 >> 8)
+				}
+				j += 4
+			}
+		}
+	}
+}

vendor/github.com/disintegration/imaging/tools.go

@@ -0,0 +1,249 @@
+package imaging
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"math"
+)
+
+// New creates a new image with the specified width and height, and fills it with the specified color.
+func New(width, height int, fillColor color.Color) *image.NRGBA {
+	if width <= 0 || height <= 0 {
+		return &image.NRGBA{}
+	}
+
+	c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
+	if (c == color.NRGBA{0, 0, 0, 0}) {
+		return image.NewNRGBA(image.Rect(0, 0, width, height))
+	}
+
+	return &image.NRGBA{
+		Pix:    bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height),
+		Stride: 4 * width,
+		Rect:   image.Rect(0, 0, width, height),
+	}
+}
+
+// Clone returns a copy of the given image.
+func Clone(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	size := src.w * 4
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+size])
+		}
+	})
+	return dst
+}
+
+// Anchor is the anchor point for image alignment.
+type Anchor int
+
+// Anchor point positions.
+const (
+	Center Anchor = iota
+	TopLeft
+	Top
+	TopRight
+	Left
+	Right
+	BottomLeft
+	Bottom
+	BottomRight
+)
+
+func anchorPt(b image.Rectangle, w, h int, anchor Anchor) image.Point {
+	var x, y int
+	switch anchor {
+	case TopLeft:
+		x = b.Min.X
+		y = b.Min.Y
+	case Top:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y
+	case TopRight:
+		x = b.Max.X - w
+		y = b.Min.Y
+	case Left:
+		x = b.Min.X
+		y = b.Min.Y + (b.Dy()-h)/2
+	case Right:
+		x = b.Max.X - w
+		y = b.Min.Y + (b.Dy()-h)/2
+	case BottomLeft:
+		x = b.Min.X
+		y = b.Max.Y - h
+	case Bottom:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Max.Y - h
+	case BottomRight:
+		x = b.Max.X - w
+		y = b.Max.Y - h
+	default:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y + (b.Dy()-h)/2
+	}
+	return image.Pt(x, y)
+}
+
+// Crop cuts out a rectangular region with the specified bounds
+// from the image and returns the cropped image.
+func Crop(img image.Image, rect image.Rectangle) *image.NRGBA {
+	r := rect.Intersect(img.Bounds()).Sub(img.Bounds().Min)
+	if r.Empty() {
+		return &image.NRGBA{}
+	}
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, r.Dx(), r.Dy()))
+	rowSize := r.Dx() * 4
+	parallel(r.Min.Y, r.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			i := (y - r.Min.Y) * dst.Stride
+			src.scan(r.Min.X, y, r.Max.X, y+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// CropAnchor cuts out a rectangular region with the specified size
+// from the image using the specified anchor point and returns the cropped image.
+func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA {
+	srcBounds := img.Bounds()
+	pt := anchorPt(srcBounds, width, height, anchor)
+	r := image.Rect(0, 0, width, height).Add(pt)
+	b := srcBounds.Intersect(r)
+	return Crop(img, b)
+}
+
+// CropCenter cuts out a rectangular region with the specified size
+// from the center of the image and returns the cropped image.
+func CropCenter(img image.Image, width, height int) *image.NRGBA {
+	return CropAnchor(img, width, height, Center)
+}
+
+// Paste pastes the img image to the background image at the specified position and returns the combined image.
+func Paste(background, img image.Image, pos image.Point) *image.NRGBA {
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			i1 := y*dst.Stride + interRect.Min.X*4
+			i2 := i1 + interRect.Dx()*4
+			src.scan(x1, y1, x2, y2, dst.Pix[i1:i2])
+		}
+	})
+	return dst
+}
+
+// PasteCenter pastes the img image to the center of the background image and returns the combined image.
+func PasteCenter(background, img image.Image) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Paste(background, img, image.Pt(x0, y0))
+}
+
+// Overlay draws the img image over the background image at given position
+// and returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+//
+// Examples:
+//
+//	// Draw spriteImage over backgroundImage at the given position (x=50, y=50).
+//	dstImage := imaging.Overlay(backgroundImage, spriteImage, image.Pt(50, 50), 1.0)
+//
+//	// Blend two opaque images of the same size.
+//	dstImage := imaging.Overlay(imageOne, imageTwo, image.Pt(0, 0), 0.5)
+//
+func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA {
+	opacity = math.Min(math.Max(opacity, 0.0), 1.0) // Ensure 0.0 <= opacity <= 1.0.
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		scanLine := make([]uint8, interRect.Dx()*4)
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			src.scan(x1, y1, x2, y2, scanLine)
+			i := y*dst.Stride + interRect.Min.X*4
+			j := 0
+			for x := interRect.Min.X; x < interRect.Max.X; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r1 := float64(d[0])
+				g1 := float64(d[1])
+				b1 := float64(d[2])
+				a1 := float64(d[3])
+
+				s := scanLine[j : j+4 : j+4]
+				r2 := float64(s[0])
+				g2 := float64(s[1])
+				b2 := float64(s[2])
+				a2 := float64(s[3])
+
+				coef2 := opacity * a2 / 255
+				coef1 := (1 - coef2) * a1 / 255
+				coefSum := coef1 + coef2
+				coef1 /= coefSum
+				coef2 /= coefSum
+
+				d[0] = uint8(r1*coef1 + r2*coef2)
+				d[1] = uint8(g1*coef1 + g2*coef2)
+				d[2] = uint8(b1*coef1 + b2*coef2)
+				d[3] = uint8(math.Min(a1+a2*opacity*(255-a1)/255, 255))
+
+				i += 4
+				j += 4
+			}
+		}
+	})
+	return dst
+}
+
+// OverlayCenter overlays the img image to the center of the background image and
+// returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Overlay(background, img, image.Point{x0, y0}, opacity)
+}

vendor/github.com/disintegration/imaging/transform.go

@@ -0,0 +1,268 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// FlipH flips the image horizontally (from left to right) and returns the transformed image.
+func FlipH(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstY
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// FlipV flips the image vertically (from top to bottom) and returns the transformed image.
+func FlipV(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transpose flips the image horizontally and rotates 90 degrees counter-clockwise.
+func Transpose(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transverse flips the image vertically and rotates 90 degrees counter-clockwise.
+func Transverse(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate90 rotates the image 90 degrees counter-clockwise and returns the transformed image.
+func Rotate90(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate180 rotates the image 180 degrees counter-clockwise and returns the transformed image.
+func Rotate180(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate270 rotates the image 270 degrees counter-clockwise and returns the transformed image.
+func Rotate270(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate rotates an image by the given angle counter-clockwise .
+// The angle parameter is the rotation angle in degrees.
+// The bgColor parameter specifies the color of the uncovered zone after the rotation.
+func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA {
+	angle = angle - math.Floor(angle/360)*360
+
+	switch angle {
+	case 0:
+		return Clone(img)
+	case 90:
+		return Rotate90(img)
+	case 180:
+		return Rotate180(img)
+	case 270:
+		return Rotate270(img)
+	}
+
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW, dstH := rotatedSize(srcW, srcH, angle)
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	if dstW <= 0 || dstH <= 0 {
+		return dst
+	}
+
+	srcXOff := float64(srcW)/2 - 0.5
+	srcYOff := float64(srcH)/2 - 0.5
+	dstXOff := float64(dstW)/2 - 0.5
+	dstYOff := float64(dstH)/2 - 0.5
+
+	bgColorNRGBA := color.NRGBAModel.Convert(bgColor).(color.NRGBA)
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			for dstX := 0; dstX < dstW; dstX++ {
+				xf, yf := rotatePoint(float64(dstX)-dstXOff, float64(dstY)-dstYOff, sin, cos)
+				xf, yf = xf+srcXOff, yf+srcYOff
+				interpolatePoint(dst, dstX, dstY, src, xf, yf, bgColorNRGBA)
+			}
+		}
+	})
+
+	return dst
+}
+
+func rotatePoint(x, y, sin, cos float64) (float64, float64) {
+	return x*cos - y*sin, x*sin + y*cos
+}
+
+func rotatedSize(w, h int, angle float64) (int, int) {
+	if w <= 0 || h <= 0 {
+		return 0, 0
+	}
+
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+	x1, y1 := rotatePoint(float64(w-1), 0, sin, cos)
+	x2, y2 := rotatePoint(float64(w-1), float64(h-1), sin, cos)
+	x3, y3 := rotatePoint(0, float64(h-1), sin, cos)
+
+	minx := math.Min(x1, math.Min(x2, math.Min(x3, 0)))
+	maxx := math.Max(x1, math.Max(x2, math.Max(x3, 0)))
+	miny := math.Min(y1, math.Min(y2, math.Min(y3, 0)))
+	maxy := math.Max(y1, math.Max(y2, math.Max(y3, 0)))
+
+	neww := maxx - minx + 1
+	if neww-math.Floor(neww) > 0.1 {
+		neww++
+	}
+	newh := maxy - miny + 1
+	if newh-math.Floor(newh) > 0.1 {
+		newh++
+	}
+
+	return int(neww), int(newh)
+}
+
+func interpolatePoint(dst *image.NRGBA, dstX, dstY int, src *image.NRGBA, xf, yf float64, bgColor color.NRGBA) {
+	j := dstY*dst.Stride + dstX*4
+	d := dst.Pix[j : j+4 : j+4]
+
+	x0 := int(math.Floor(xf))
+	y0 := int(math.Floor(yf))
+	bounds := src.Bounds()
+	if !image.Pt(x0, y0).In(image.Rect(bounds.Min.X-1, bounds.Min.Y-1, bounds.Max.X, bounds.Max.Y)) {
+		d[0] = bgColor.R
+		d[1] = bgColor.G
+		d[2] = bgColor.B
+		d[3] = bgColor.A
+		return
+	}
+
+	xq := xf - float64(x0)
+	yq := yf - float64(y0)
+	points := [4]image.Point{
+		{x0, y0},
+		{x0 + 1, y0},
+		{x0, y0 + 1},
+		{x0 + 1, y0 + 1},
+	}
+	weights := [4]float64{
+		(1 - xq) * (1 - yq),
+		xq * (1 - yq),
+		(1 - xq) * yq,
+		xq * yq,
+	}
+
+	var r, g, b, a float64
+	for i := 0; i < 4; i++ {
+		p := points[i]
+		w := weights[i]
+		if p.In(bounds) {
+			i := p.Y*src.Stride + p.X*4
+			s := src.Pix[i : i+4 : i+4]
+			wa := float64(s[3]) * w
+			r += float64(s[0]) * wa
+			g += float64(s[1]) * wa
+			b += float64(s[2]) * wa
+			a += wa
+		} else {
+			wa := float64(bgColor.A) * w
+			r += float64(bgColor.R) * wa
+			g += float64(bgColor.G) * wa
+			b += float64(bgColor.B) * wa
+			a += wa
+		}
+	}
+	if a != 0 {
+		aInv := 1 / a
+		d[0] = clamp(r * aInv)
+		d[1] = clamp(g * aInv)
+		d[2] = clamp(b * aInv)
+		d[3] = clamp(a)
+	}
+}

vendor/github.com/disintegration/imaging/utils.go

@@ -0,0 +1,167 @@
+package imaging
+
+import (
+	"image"
+	"math"
+	"runtime"
+	"sync"
+)
+
+// parallel processes the data in separate goroutines.
+func parallel(start, stop int, fn func(<-chan int)) {
+	count := stop - start
+	if count < 1 {
+		return
+	}
+
+	procs := runtime.GOMAXPROCS(0)
+	if procs > count {
+		procs = count
+	}
+
+	c := make(chan int, count)
+	for i := start; i < stop; i++ {
+		c <- i
+	}
+	close(c)
+
+	var wg sync.WaitGroup
+	for i := 0; i < procs; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			fn(c)
+		}()
+	}
+	wg.Wait()
+}
+
+// absint returns the absolute value of i.
+func absint(i int) int {
+	if i < 0 {
+		return -i
+	}
+	return i
+}
+
+// clamp rounds and clamps float64 value to fit into uint8.
+func clamp(x float64) uint8 {
+	v := int64(x + 0.5)
+	if v > 255 {
+		return 255
+	}
+	if v > 0 {
+		return uint8(v)
+	}
+	return 0
+}
+
+func reverse(pix []uint8) {
+	if len(pix) <= 4 {
+		return
+	}
+	i := 0
+	j := len(pix) - 4
+	for i < j {
+		pi := pix[i : i+4 : i+4]
+		pj := pix[j : j+4 : j+4]
+		pi[0], pj[0] = pj[0], pi[0]
+		pi[1], pj[1] = pj[1], pi[1]
+		pi[2], pj[2] = pj[2], pi[2]
+		pi[3], pj[3] = pj[3], pi[3]
+		i += 4
+		j -= 4
+	}
+}
+
+func toNRGBA(img image.Image) *image.NRGBA {
+	if img, ok := img.(*image.NRGBA); ok {
+		return &image.NRGBA{
+			Pix:    img.Pix,
+			Stride: img.Stride,
+			Rect:   img.Rect.Sub(img.Rect.Min),
+		}
+	}
+	return Clone(img)
+}
+
+// rgbToHSL converts a color from RGB to HSL.
+func rgbToHSL(r, g, b uint8) (float64, float64, float64) {
+	rr := float64(r) / 255
+	gg := float64(g) / 255
+	bb := float64(b) / 255
+
+	max := math.Max(rr, math.Max(gg, bb))
+	min := math.Min(rr, math.Min(gg, bb))
+
+	l := (max + min) / 2
+
+	if max == min {
+		return 0, 0, l
+	}
+
+	var h, s float64
+	d := max - min
+	if l > 0.5 {
+		s = d / (2 - max - min)
+	} else {
+		s = d / (max + min)
+	}
+
+	switch max {
+	case rr:
+		h = (gg - bb) / d
+		if g < b {
+			h += 6
+		}
+	case gg:
+		h = (bb-rr)/d + 2
+	case bb:
+		h = (rr-gg)/d + 4
+	}
+	h /= 6
+
+	return h, s, l
+}
+
+// hslToRGB converts a color from HSL to RGB.
+func hslToRGB(h, s, l float64) (uint8, uint8, uint8) {
+	var r, g, b float64
+	if s == 0 {
+		v := clamp(l * 255)
+		return v, v, v
+	}
+
+	var q float64
+	if l < 0.5 {
+		q = l * (1 + s)
+	} else {
+		q = l + s - l*s
+	}
+	p := 2*l - q
+
+	r = hueToRGB(p, q, h+1/3.0)
+	g = hueToRGB(p, q, h)
+	b = hueToRGB(p, q, h-1/3.0)
+
+	return clamp(r * 255), clamp(g * 255), clamp(b * 255)
+}
+
+func hueToRGB(p, q, t float64) float64 {
+	if t < 0 {
+		t++
+	}
+	if t > 1 {
+		t--
+	}
+	if t < 1/6.0 {
+		return p + (q-p)*6*t
+	}
+	if t < 1/2.0 {
+		return q
+	}
+	if t < 2/3.0 {
+		return p + (q-p)*(2/3.0-t)*6
+	}
+	return p
+}

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

@@ -1,4 +0,0 @@
-logrus
-vendor
-
-.idea/

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

@@ -1,40 +0,0 @@
-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

@@ -1,15 +0,0 @@
-language: go
-go_import_path: github.com/sirupsen/logrus
-git:
-  depth: 1
-env:
-  - GO111MODULE=on
-go: 1.15.x
-os: linux
-install:
-  - ./travis/install.sh
-script:
-  - cd ci
-  - go run mage.go -v -w ../ crossBuild
-  - go run mage.go -v -w ../ lint
-  - go run mage.go -v -w ../ test

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

@@ -1,259 +0,0 @@
-# 1.8.1
-Code quality:
-  * move magefile in its own subdir/submodule to remove magefile dependency on logrus consumer
-  * improve timestamp format documentation
-
-Fixes:
-  * fix race condition on logger hooks
-
-
-# 1.8.0
-
-Correct versioning number replacing v1.7.1.
-
-# 1.7.1
-
-Beware this release has introduced a new public API and its semver is therefore incorrect.
-
-Code quality:
-  * use go 1.15 in travis
-  * use magefile as task runner
-
-Fixes:
-  * small fixes about new go 1.13 error formatting system
-  * Fix for long time race condiction with mutating data hooks
-
-Features:
-  * build support for zos
-
-# 1.7.0
-Fixes:
-  * the dependency toward a windows terminal library has been removed
-
-Features:
-  * a new buffer pool management API has been added
-  * a set of `<LogLevel>Fn()` functions have been added
-
-# 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/README.md

@@ -1,513 +0,0 @@
-# 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, %w", 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

@@ -1,76 +0,0 @@
-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

@@ -1,14 +0,0 @@
-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/buffer_pool.go

@@ -1,52 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"sync"
-)
-
-var (
-	bufferPool BufferPool
-)
-
-type BufferPool interface {
-	Put(*bytes.Buffer)
-	Get() *bytes.Buffer
-}
-
-type defaultPool struct {
-	pool *sync.Pool
-}
-
-func (p *defaultPool) Put(buf *bytes.Buffer) {
-	p.pool.Put(buf)
-}
-
-func (p *defaultPool) Get() *bytes.Buffer {
-	return p.pool.Get().(*bytes.Buffer)
-}
-
-func getBuffer() *bytes.Buffer {
-	return bufferPool.Get()
-}
-
-func putBuffer(buf *bytes.Buffer) {
-	buf.Reset()
-	bufferPool.Put(buf)
-}
-
-// SetBufferPool allows to replace the default logrus buffer pool
-// to better meets the specific needs of an application.
-func SetBufferPool(bp BufferPool) {
-	bufferPool = bp
-}
-
-func init() {
-	SetBufferPool(&defaultPool{
-		pool: &sync.Pool{
-			New: func() interface{} {
-				return new(bytes.Buffer)
-			},
-		},
-	})
-}

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

@@ -1,26 +0,0 @@
-/*
-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

@@ -1,431 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"os"
-	"reflect"
-	"runtime"
-	"strings"
-	"sync"
-	"time"
-)
-
-var (
-
-	// 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() {
-	// 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),
-	}
-}
-
-func (entry *Entry) Dup() *Entry {
-	data := make(Fields, len(entry.Data))
-	for k, v := range entry.Data {
-		data[k] = v
-	}
-	return &Entry{Logger: entry.Logger, Data: data, Time: entry.Time, Context: entry.Context, err: entry.err}
-}
-
-// 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 {
-			case t.Kind() == reflect.Func, t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Func:
-				isErrField = true
-			}
-		}
-		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
-}
-
-func (entry *Entry) log(level Level, msg string) {
-	var buffer *bytes.Buffer
-
-	newEntry := entry.Dup()
-
-	if newEntry.Time.IsZero() {
-		newEntry.Time = time.Now()
-	}
-
-	newEntry.Level = level
-	newEntry.Message = msg
-
-	newEntry.Logger.mu.Lock()
-	reportCaller := newEntry.Logger.ReportCaller
-	newEntry.Logger.mu.Unlock()
-
-	if reportCaller {
-		newEntry.Caller = getCaller()
-	}
-
-	newEntry.fireHooks()
-
-	buffer = getBuffer()
-	defer func() {
-		newEntry.Buffer = nil
-		putBuffer(buffer)
-	}()
-	buffer.Reset()
-	newEntry.Buffer = buffer
-
-	newEntry.write()
-
-	newEntry.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(newEntry)
-	}
-}
-
-func (entry *Entry) fireHooks() {
-	var tmpHooks LevelHooks
-	entry.Logger.mu.Lock()
-	tmpHooks = make(LevelHooks, len(entry.Logger.Hooks))
-	for k, v := range entry.Logger.Hooks {
-		tmpHooks[k] = v
-	}
-	entry.Logger.mu.Unlock()
-
-	err := tmpHooks.Fire(entry.Level, entry)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
-	}
-}
-
-func (entry *Entry) write() {
-	serialized, err := entry.Logger.Formatter.Format(entry)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to obtain reader, %v\n", err)
-		return
-	}
-	entry.Logger.mu.Lock()
-	defer entry.Logger.mu.Unlock()
-	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...)
-}
-
-// 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

@@ -1,270 +0,0 @@
-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...)
-}
-
-// TraceFn logs a message from a func at level Trace on the standard logger.
-func TraceFn(fn LogFunction) {
-	std.TraceFn(fn)
-}
-
-// DebugFn logs a message from a func at level Debug on the standard logger.
-func DebugFn(fn LogFunction) {
-	std.DebugFn(fn)
-}
-
-// PrintFn logs a message from a func at level Info on the standard logger.
-func PrintFn(fn LogFunction) {
-	std.PrintFn(fn)
-}
-
-// InfoFn logs a message from a func at level Info on the standard logger.
-func InfoFn(fn LogFunction) {
-	std.InfoFn(fn)
-}
-
-// WarnFn logs a message from a func at level Warn on the standard logger.
-func WarnFn(fn LogFunction) {
-	std.WarnFn(fn)
-}
-
-// WarningFn logs a message from a func at level Warn on the standard logger.
-func WarningFn(fn LogFunction) {
-	std.WarningFn(fn)
-}
-
-// ErrorFn logs a message from a func at level Error on the standard logger.
-func ErrorFn(fn LogFunction) {
-	std.ErrorFn(fn)
-}
-
-// PanicFn logs a message from a func at level Panic on the standard logger.
-func PanicFn(fn LogFunction) {
-	std.PanicFn(fn)
-}
-
-// FatalFn logs a message from a func at level Fatal on the standard logger then the process will exit with status set to 1.
-func FatalFn(fn LogFunction) {
-	std.FatalFn(fn)
-}
-
-// 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

@@ -1,78 +0,0 @@
-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/hooks.go

@@ -1,34 +0,0 @@
-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

@@ -1,128 +0,0 @@
-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.
-	// The format to use is the same than for time.Format or time.Parse from the standard
-	// library.
-	// The standard Library already provides a set of predefined format.
-	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, %w", err)
-	}
-
-	return b.Bytes(), nil
-}

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

@@ -1,404 +0,0 @@
-package logrus
-
-import (
-	"context"
-	"io"
-	"os"
-	"sync"
-	"sync/atomic"
-	"time"
-)
-
-// LogFunction For big messages, it can be more efficient to pass a function
-// and only call it if the log level is actually enables rather than
-// generating the log message and then checking if the level is enabled
-type LogFunction func() []interface{}
-
-type Logger struct {
-	// The logs are `io.Copy`'d to this in a mutex. It's common to set this to a
-	// file, or leave it default which is `os.Stderr`. You can also set this to
-	// something more adventurous, such as logging to Kafka.
-	Out io.Writer
-	// Hooks for the logger instance. These allow firing events based on logging
-	// levels and log entries. For example, to send errors to an error tracking
-	// service, log to StatsD or dump the core on fatal errors.
-	Hooks LevelHooks
-	// All log entries pass through the formatter before logged to Out. The
-	// included formatters are `TextFormatter` and `JSONFormatter` for which
-	// TextFormatter is the default. In development (when a TTY is attached) it
-	// logs with colors, but to a file it wouldn't. You can easily implement your
-	// own that implements the `Formatter` interface, see the `README` or included
-	// formatters for examples.
-	Formatter Formatter
-
-	// Flag for whether to log caller info (off by default)
-	ReportCaller bool
-
-	// The logging level the logger should log at. This is typically (and defaults
-	// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
-	// logged.
-	Level Level
-	// Used to sync writing to the log. Locking is enabled by Default
-	mu MutexWrap
-	// Reusable empty entry
-	entryPool sync.Pool
-	// Function to exit the application, defaults to `os.Exit()`
-	ExitFunc exitFunc
-}
-
-type exitFunc func(int)
-
-type MutexWrap struct {
-	lock     sync.Mutex
-	disabled bool
-}
-
-func (mw *MutexWrap) Lock() {
-	if !mw.disabled {
-		mw.lock.Lock()
-	}
-}
-
-func (mw *MutexWrap) Unlock() {
-	if !mw.disabled {
-		mw.lock.Unlock()
-	}
-}
-
-func (mw *MutexWrap) Disable() {
-	mw.disabled = true
-}
-
-// Creates a new logger. Configuration should be set by changing `Formatter`,
-// `Out` and `Hooks` directly on the default logger instance. You can also just
-// instantiate your own:
-//
-//    var log = &logrus.Logger{
-//      Out: os.Stderr,
-//      Formatter: new(logrus.TextFormatter),
-//      Hooks: make(logrus.LevelHooks),
-//      Level: logrus.DebugLevel,
-//    }
-//
-// It's recommended to make this a global instance called `log`.
-func New() *Logger {
-	return &Logger{
-		Out:          os.Stderr,
-		Formatter:    new(TextFormatter),
-		Hooks:        make(LevelHooks),
-		Level:        InfoLevel,
-		ExitFunc:     os.Exit,
-		ReportCaller: false,
-	}
-}
-
-func (logger *Logger) newEntry() *Entry {
-	entry, ok := logger.entryPool.Get().(*Entry)
-	if ok {
-		return entry
-	}
-	return NewEntry(logger)
-}
-
-func (logger *Logger) releaseEntry(entry *Entry) {
-	entry.Data = map[string]interface{}{}
-	logger.entryPool.Put(entry)
-}
-
-// WithField allocates a new entry and adds a field to it.
-// Debug, Print, Info, Warn, Error, Fatal or Panic must be then applied to
-// this new returned entry.
-// If you want multiple fields, use `WithFields`.
-func (logger *Logger) WithField(key string, value interface{}) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithField(key, value)
-}
-
-// Adds a struct of fields to the log entry. All it does is call `WithField` for
-// each `Field`.
-func (logger *Logger) WithFields(fields Fields) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithFields(fields)
-}
-
-// Add an error as single field to the log entry.  All it does is call
-// `WithError` for the given `error`.
-func (logger *Logger) WithError(err error) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithError(err)
-}
-
-// Add a context to the log entry.
-func (logger *Logger) WithContext(ctx context.Context) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithContext(ctx)
-}
-
-// Overrides the time of the log entry.
-func (logger *Logger) WithTime(t time.Time) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithTime(t)
-}
-
-func (logger *Logger) Logf(level Level, format string, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Logf(level, format, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Tracef(format string, args ...interface{}) {
-	logger.Logf(TraceLevel, format, args...)
-}
-
-func (logger *Logger) Debugf(format string, args ...interface{}) {
-	logger.Logf(DebugLevel, format, args...)
-}
-
-func (logger *Logger) Infof(format string, args ...interface{}) {
-	logger.Logf(InfoLevel, format, args...)
-}
-
-func (logger *Logger) Printf(format string, args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Printf(format, args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warnf(format string, args ...interface{}) {
-	logger.Logf(WarnLevel, format, args...)
-}
-
-func (logger *Logger) Warningf(format string, args ...interface{}) {
-	logger.Warnf(format, args...)
-}
-
-func (logger *Logger) Errorf(format string, args ...interface{}) {
-	logger.Logf(ErrorLevel, format, args...)
-}
-
-func (logger *Logger) Fatalf(format string, args ...interface{}) {
-	logger.Logf(FatalLevel, format, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panicf(format string, args ...interface{}) {
-	logger.Logf(PanicLevel, format, args...)
-}
-
-func (logger *Logger) Log(level Level, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Log(level, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) LogFn(level Level, fn LogFunction) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Log(level, fn()...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Trace(args ...interface{}) {
-	logger.Log(TraceLevel, args...)
-}
-
-func (logger *Logger) Debug(args ...interface{}) {
-	logger.Log(DebugLevel, args...)
-}
-
-func (logger *Logger) Info(args ...interface{}) {
-	logger.Log(InfoLevel, args...)
-}
-
-func (logger *Logger) Print(args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Print(args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warn(args ...interface{}) {
-	logger.Log(WarnLevel, args...)
-}
-
-func (logger *Logger) Warning(args ...interface{}) {
-	logger.Warn(args...)
-}
-
-func (logger *Logger) Error(args ...interface{}) {
-	logger.Log(ErrorLevel, args...)
-}
-
-func (logger *Logger) Fatal(args ...interface{}) {
-	logger.Log(FatalLevel, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panic(args ...interface{}) {
-	logger.Log(PanicLevel, args...)
-}
-
-func (logger *Logger) TraceFn(fn LogFunction) {
-	logger.LogFn(TraceLevel, fn)
-}
-
-func (logger *Logger) DebugFn(fn LogFunction) {
-	logger.LogFn(DebugLevel, fn)
-}
-
-func (logger *Logger) InfoFn(fn LogFunction) {
-	logger.LogFn(InfoLevel, fn)
-}
-
-func (logger *Logger) PrintFn(fn LogFunction) {
-	entry := logger.newEntry()
-	entry.Print(fn()...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) WarnFn(fn LogFunction) {
-	logger.LogFn(WarnLevel, fn)
-}
-
-func (logger *Logger) WarningFn(fn LogFunction) {
-	logger.WarnFn(fn)
-}
-
-func (logger *Logger) ErrorFn(fn LogFunction) {
-	logger.LogFn(ErrorLevel, fn)
-}
-
-func (logger *Logger) FatalFn(fn LogFunction) {
-	logger.LogFn(FatalLevel, fn)
-	logger.Exit(1)
-}
-
-func (logger *Logger) PanicFn(fn LogFunction) {
-	logger.LogFn(PanicLevel, fn)
-}
-
-func (logger *Logger) Logln(level Level, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Logln(level, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Traceln(args ...interface{}) {
-	logger.Logln(TraceLevel, args...)
-}
-
-func (logger *Logger) Debugln(args ...interface{}) {
-	logger.Logln(DebugLevel, args...)
-}
-
-func (logger *Logger) Infoln(args ...interface{}) {
-	logger.Logln(InfoLevel, args...)
-}
-
-func (logger *Logger) Println(args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Println(args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warnln(args ...interface{}) {
-	logger.Logln(WarnLevel, args...)
-}
-
-func (logger *Logger) Warningln(args ...interface{}) {
-	logger.Warnln(args...)
-}
-
-func (logger *Logger) Errorln(args ...interface{}) {
-	logger.Logln(ErrorLevel, args...)
-}
-
-func (logger *Logger) Fatalln(args ...interface{}) {
-	logger.Logln(FatalLevel, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panicln(args ...interface{}) {
-	logger.Logln(PanicLevel, args...)
-}
-
-func (logger *Logger) Exit(code int) {
-	runHandlers()
-	if logger.ExitFunc == nil {
-		logger.ExitFunc = os.Exit
-	}
-	logger.ExitFunc(code)
-}
-
-//When file is opened with appending mode, it's safe to
-//write concurrently to a file (within 4k message on Linux).
-//In these cases user can choose to disable the lock.
-func (logger *Logger) SetNoLock() {
-	logger.mu.Disable()
-}
-
-func (logger *Logger) level() Level {
-	return Level(atomic.LoadUint32((*uint32)(&logger.Level)))
-}
-
-// SetLevel sets the logger level.
-func (logger *Logger) SetLevel(level Level) {
-	atomic.StoreUint32((*uint32)(&logger.Level), uint32(level))
-}
-
-// GetLevel returns the logger level.
-func (logger *Logger) GetLevel() Level {
-	return logger.level()
-}
-
-// AddHook adds a hook to the logger hooks.
-func (logger *Logger) AddHook(hook Hook) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Hooks.Add(hook)
-}
-
-// IsLevelEnabled checks if the log level of the logger is greater than the level param
-func (logger *Logger) IsLevelEnabled(level Level) bool {
-	return logger.level() >= level
-}
-
-// SetFormatter sets the logger formatter.
-func (logger *Logger) SetFormatter(formatter Formatter) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Formatter = formatter
-}
-
-// SetOutput sets the logger output.
-func (logger *Logger) SetOutput(output io.Writer) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Out = output
-}
-
-func (logger *Logger) SetReportCaller(reportCaller bool) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.ReportCaller = reportCaller
-}
-
-// ReplaceHooks replaces the logger hooks and returns the old ones
-func (logger *Logger) ReplaceHooks(hooks LevelHooks) LevelHooks {
-	logger.mu.Lock()
-	oldHooks := logger.Hooks
-	logger.Hooks = hooks
-	logger.mu.Unlock()
-	return oldHooks
-}

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

@@ -1,186 +0,0 @@
-package logrus
-
-import (
-	"fmt"
-	"log"
-	"strings"
-)
-
-// Fields type, used to pass to `WithFields`.
-type Fields map[string]interface{}
-
-// Level type
-type Level uint32
-
-// Convert the Level to a string. E.g. PanicLevel becomes "panic".
-func (level Level) String() string {
-	if b, err := level.MarshalText(); err == nil {
-		return string(b)
-	} else {
-		return "unknown"
-	}
-}
-
-// ParseLevel takes a string level and returns the Logrus log level constant.
-func ParseLevel(lvl string) (Level, error) {
-	switch strings.ToLower(lvl) {
-	case "panic":
-		return PanicLevel, nil
-	case "fatal":
-		return FatalLevel, nil
-	case "error":
-		return ErrorLevel, nil
-	case "warn", "warning":
-		return WarnLevel, nil
-	case "info":
-		return InfoLevel, nil
-	case "debug":
-		return DebugLevel, nil
-	case "trace":
-		return TraceLevel, nil
-	}
-
-	var l Level
-	return l, fmt.Errorf("not a valid logrus Level: %q", lvl)
-}
-
-// UnmarshalText implements encoding.TextUnmarshaler.
-func (level *Level) UnmarshalText(text []byte) error {
-	l, err := ParseLevel(string(text))
-	if err != nil {
-		return err
-	}
-
-	*level = l
-
-	return nil
-}
-
-func (level Level) MarshalText() ([]byte, error) {
-	switch level {
-	case TraceLevel:
-		return []byte("trace"), nil
-	case DebugLevel:
-		return []byte("debug"), nil
-	case InfoLevel:
-		return []byte("info"), nil
-	case WarnLevel:
-		return []byte("warning"), nil
-	case ErrorLevel:
-		return []byte("error"), nil
-	case FatalLevel:
-		return []byte("fatal"), nil
-	case PanicLevel:
-		return []byte("panic"), nil
-	}
-
-	return nil, fmt.Errorf("not a valid logrus level %d", level)
-}
-
-// A constant exposing all logging levels
-var AllLevels = []Level{
-	PanicLevel,
-	FatalLevel,
-	ErrorLevel,
-	WarnLevel,
-	InfoLevel,
-	DebugLevel,
-	TraceLevel,
-}
-
-// These are the different logging levels. You can set the logging level to log
-// on your instance of logger, obtained with `logrus.New()`.
-const (
-	// PanicLevel level, highest level of severity. Logs and then calls panic with the
-	// message passed to Debug, Info, ...
-	PanicLevel Level = iota
-	// FatalLevel level. Logs and then calls `logger.Exit(1)`. It will exit even if the
-	// logging level is set to Panic.
-	FatalLevel
-	// ErrorLevel level. Logs. Used for errors that should definitely be noted.
-	// Commonly used for hooks to send errors to an error tracking service.
-	ErrorLevel
-	// WarnLevel level. Non-critical entries that deserve eyes.
-	WarnLevel
-	// InfoLevel level. General operational entries about what's going on inside the
-	// application.
-	InfoLevel
-	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
-	DebugLevel
-	// TraceLevel level. Designates finer-grained informational events than the Debug.
-	TraceLevel
-)
-
-// Won't compile if StdLogger can't be realized by a log.Logger
-var (
-	_ StdLogger = &log.Logger{}
-	_ StdLogger = &Entry{}
-	_ StdLogger = &Logger{}
-)
-
-// StdLogger is what your logrus-enabled library should take, that way
-// it'll accept a stdlib logger and a logrus logger. There's no standard
-// interface, this is the closest we get, unfortunately.
-type StdLogger interface {
-	Print(...interface{})
-	Printf(string, ...interface{})
-	Println(...interface{})
-
-	Fatal(...interface{})
-	Fatalf(string, ...interface{})
-	Fatalln(...interface{})
-
-	Panic(...interface{})
-	Panicf(string, ...interface{})
-	Panicln(...interface{})
-}
-
-// The FieldLogger interface generalizes the Entry and Logger types
-type FieldLogger interface {
-	WithField(key string, value interface{}) *Entry
-	WithFields(fields Fields) *Entry
-	WithError(err error) *Entry
-
-	Debugf(format string, args ...interface{})
-	Infof(format string, args ...interface{})
-	Printf(format string, args ...interface{})
-	Warnf(format string, args ...interface{})
-	Warningf(format string, args ...interface{})
-	Errorf(format string, args ...interface{})
-	Fatalf(format string, args ...interface{})
-	Panicf(format string, args ...interface{})
-
-	Debug(args ...interface{})
-	Info(args ...interface{})
-	Print(args ...interface{})
-	Warn(args ...interface{})
-	Warning(args ...interface{})
-	Error(args ...interface{})
-	Fatal(args ...interface{})
-	Panic(args ...interface{})
-
-	Debugln(args ...interface{})
-	Infoln(args ...interface{})
-	Println(args ...interface{})
-	Warnln(args ...interface{})
-	Warningln(args ...interface{})
-	Errorln(args ...interface{})
-	Fatalln(args ...interface{})
-	Panicln(args ...interface{})
-
-	// IsDebugEnabled() bool
-	// IsInfoEnabled() bool
-	// IsWarnEnabled() bool
-	// IsErrorEnabled() bool
-	// IsFatalEnabled() bool
-	// IsPanicEnabled() bool
-}
-
-// Ext1FieldLogger (the first extension to FieldLogger) is superfluous, it is
-// here for consistancy. Do not use. Use Logger or Entry instead.
-type Ext1FieldLogger interface {
-	FieldLogger
-	Tracef(format string, args ...interface{})
-	Trace(args ...interface{})
-	Traceln(args ...interface{})
-}

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

@@ -1,11 +0,0 @@
-// +build appengine
-
-package logrus
-
-import (
-	"io"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	return true
-}

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

@@ -1,13 +0,0 @@
-// +build darwin dragonfly freebsd netbsd openbsd
-// +build !js
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TIOCGETA
-
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
-	return err == nil
-}

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

@@ -1,7 +0,0 @@
-// +build js
-
-package logrus
-
-func isTerminal(fd int) bool {
-	return false
-}

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

@@ -1,11 +0,0 @@
-// +build js nacl plan9
-
-package logrus
-
-import (
-	"io"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	return false
-}

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

@@ -1,17 +0,0 @@
-// +build !appengine,!js,!windows,!nacl,!plan9
-
-package logrus
-
-import (
-	"io"
-	"os"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	switch v := w.(type) {
-	case *os.File:
-		return isTerminal(int(v.Fd()))
-	default:
-		return false
-	}
-}

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

@@ -1,11 +0,0 @@
-package logrus
-
-import (
-	"golang.org/x/sys/unix"
-)
-
-// IsTerminal returns true if the given file descriptor is a terminal.
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermio(fd, unix.TCGETA)
-	return err == nil
-}

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

@@ -1,13 +0,0 @@
-// +build linux aix zos
-// +build !js
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TCGETS
-
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
-	return err == nil
-}

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

@@ -1,27 +0,0 @@
-// +build !appengine,!js,windows
-
-package logrus
-
-import (
-	"io"
-	"os"
-
-	"golang.org/x/sys/windows"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	switch v := w.(type) {
-	case *os.File:
-		handle := windows.Handle(v.Fd())
-		var mode uint32
-		if err := windows.GetConsoleMode(handle, &mode); err != nil {
-			return false
-		}
-		mode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
-		if err := windows.SetConsoleMode(handle, mode); err != nil {
-			return false
-		}
-		return true
-	}
-	return false
-}

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

@@ -1,339 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"runtime"
-	"sort"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-	"unicode/utf8"
-)
-
-const (
-	red    = 31
-	yellow = 33
-	blue   = 36
-	gray   = 37
-)
-
-var baseTimestamp time.Time
-
-func init() {
-	baseTimestamp = time.Now()
-}
-
-// TextFormatter formats logs into text
-type TextFormatter struct {
-	// Set to true to bypass checking for a TTY before outputting colors.
-	ForceColors bool
-
-	// Force disabling colors.
-	DisableColors bool
-
-	// Force quoting of all values
-	ForceQuote bool
-
-	// DisableQuote disables quoting for all values.
-	// DisableQuote will have a lower priority than ForceQuote.
-	// If both of them are set to true, quote will be forced on all values.
-	DisableQuote bool
-
-	// Override coloring based on CLICOLOR and CLICOLOR_FORCE. - https://bixense.com/clicolors/
-	EnvironmentOverrideColors bool
-
-	// Disable timestamp logging. useful when output is redirected to logging
-	// system that already adds timestamps.
-	DisableTimestamp bool
-
-	// Enable logging the full timestamp when a TTY is attached instead of just
-	// the time passed since beginning of execution.
-	FullTimestamp bool
-
-	// TimestampFormat to use for display when a full timestamp is printed.
-	// The format to use is the same than for time.Format or time.Parse from the standard
-	// library.
-	// The standard Library already provides a set of predefined format.
-	TimestampFormat string
-
-	// The fields are sorted by default for a consistent output. For applications
-	// that log extremely frequently and don't use the JSON formatter this may not
-	// be desired.
-	DisableSorting bool
-
-	// The keys sorting function, when uninitialized it uses sort.Strings.
-	SortingFunc func([]string)
-
-	// Disables the truncation of the level text to 4 characters.
-	DisableLevelTruncation bool
-
-	// PadLevelText Adds padding the level text so that all the levels output at the same length
-	// PadLevelText is a superset of the DisableLevelTruncation option
-	PadLevelText bool
-
-	// QuoteEmptyFields will wrap empty fields in quotes if true
-	QuoteEmptyFields bool
-
-	// Whether the logger's out is to a terminal
-	isTerminal bool
-
-	// FieldMap allows users to customize the names of keys for default fields.
-	// As an example:
-	// formatter := &TextFormatter{
-	//     FieldMap: FieldMap{
-	//         FieldKeyTime:  "@timestamp",
-	//         FieldKeyLevel: "@level",
-	//         FieldKeyMsg:   "@message"}}
-	FieldMap FieldMap
-
-	// CallerPrettyfier can be set by the user to modify the content
-	// of the function and file keys in the data when ReportCaller is
-	// activated. If any of the returned value is the empty string the
-	// corresponding key will be removed from fields.
-	CallerPrettyfier func(*runtime.Frame) (function string, file string)
-
-	terminalInitOnce sync.Once
-
-	// The max length of the level text, generated dynamically on init
-	levelTextMaxLength int
-}
-
-func (f *TextFormatter) init(entry *Entry) {
-	if entry.Logger != nil {
-		f.isTerminal = checkIfTerminal(entry.Logger.Out)
-	}
-	// Get the max length of the level text
-	for _, level := range AllLevels {
-		levelTextLength := utf8.RuneCount([]byte(level.String()))
-		if levelTextLength > f.levelTextMaxLength {
-			f.levelTextMaxLength = levelTextLength
-		}
-	}
-}
-
-func (f *TextFormatter) isColored() bool {
-	isColored := f.ForceColors || (f.isTerminal && (runtime.GOOS != "windows"))
-
-	if f.EnvironmentOverrideColors {
-		switch force, ok := os.LookupEnv("CLICOLOR_FORCE"); {
-		case ok && force != "0":
-			isColored = true
-		case ok && force == "0", os.Getenv("CLICOLOR") == "0":
-			isColored = false
-		}
-	}
-
-	return isColored && !f.DisableColors
-}
-
-// Format renders a single log entry
-func (f *TextFormatter) Format(entry *Entry) ([]byte, error) {
-	data := make(Fields)
-	for k, v := range entry.Data {
-		data[k] = v
-	}
-	prefixFieldClashes(data, f.FieldMap, entry.HasCaller())
-	keys := make([]string, 0, len(data))
-	for k := range data {
-		keys = append(keys, k)
-	}
-
-	var funcVal, fileVal string
-
-	fixedKeys := make([]string, 0, 4+len(data))
-	if !f.DisableTimestamp {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyTime))
-	}
-	fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyLevel))
-	if entry.Message != "" {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyMsg))
-	}
-	if entry.err != "" {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyLogrusError))
-	}
-	if entry.HasCaller() {
-		if f.CallerPrettyfier != nil {
-			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
-		} else {
-			funcVal = entry.Caller.Function
-			fileVal = fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
-		}
-
-		if funcVal != "" {
-			fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyFunc))
-		}
-		if fileVal != "" {
-			fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyFile))
-		}
-	}
-
-	if !f.DisableSorting {
-		if f.SortingFunc == nil {
-			sort.Strings(keys)
-			fixedKeys = append(fixedKeys, keys...)
-		} else {
-			if !f.isColored() {
-				fixedKeys = append(fixedKeys, keys...)
-				f.SortingFunc(fixedKeys)
-			} else {
-				f.SortingFunc(keys)
-			}
-		}
-	} else {
-		fixedKeys = append(fixedKeys, keys...)
-	}
-
-	var b *bytes.Buffer
-	if entry.Buffer != nil {
-		b = entry.Buffer
-	} else {
-		b = &bytes.Buffer{}
-	}
-
-	f.terminalInitOnce.Do(func() { f.init(entry) })
-
-	timestampFormat := f.TimestampFormat
-	if timestampFormat == "" {
-		timestampFormat = defaultTimestampFormat
-	}
-	if f.isColored() {
-		f.printColored(b, entry, keys, data, timestampFormat)
-	} else {
-
-		for _, key := range fixedKeys {
-			var value interface{}
-			switch {
-			case key == f.FieldMap.resolve(FieldKeyTime):
-				value = entry.Time.Format(timestampFormat)
-			case key == f.FieldMap.resolve(FieldKeyLevel):
-				value = entry.Level.String()
-			case key == f.FieldMap.resolve(FieldKeyMsg):
-				value = entry.Message
-			case key == f.FieldMap.resolve(FieldKeyLogrusError):
-				value = entry.err
-			case key == f.FieldMap.resolve(FieldKeyFunc) && entry.HasCaller():
-				value = funcVal
-			case key == f.FieldMap.resolve(FieldKeyFile) && entry.HasCaller():
-				value = fileVal
-			default:
-				value = data[key]
-			}
-			f.appendKeyValue(b, key, value)
-		}
-	}
-
-	b.WriteByte('\n')
-	return b.Bytes(), nil
-}
-
-func (f *TextFormatter) printColored(b *bytes.Buffer, entry *Entry, keys []string, data Fields, timestampFormat string) {
-	var levelColor int
-	switch entry.Level {
-	case DebugLevel, TraceLevel:
-		levelColor = gray
-	case WarnLevel:
-		levelColor = yellow
-	case ErrorLevel, FatalLevel, PanicLevel:
-		levelColor = red
-	case InfoLevel:
-		levelColor = blue
-	default:
-		levelColor = blue
-	}
-
-	levelText := strings.ToUpper(entry.Level.String())
-	if !f.DisableLevelTruncation && !f.PadLevelText {
-		levelText = levelText[0:4]
-	}
-	if f.PadLevelText {
-		// Generates the format string used in the next line, for example "%-6s" or "%-7s".
-		// Based on the max level text length.
-		formatString := "%-" + strconv.Itoa(f.levelTextMaxLength) + "s"
-		// Formats the level text by appending spaces up to the max length, for example:
-		// 	- "INFO   "
-		//	- "WARNING"
-		levelText = fmt.Sprintf(formatString, levelText)
-	}
-
-	// Remove a single newline if it already exists in the message to keep
-	// the behavior of logrus text_formatter the same as the stdlib log package
-	entry.Message = strings.TrimSuffix(entry.Message, "\n")
-
-	caller := ""
-	if entry.HasCaller() {
-		funcVal := fmt.Sprintf("%s()", 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 fileVal == "" {
-			caller = funcVal
-		} else if funcVal == "" {
-			caller = fileVal
-		} else {
-			caller = fileVal + " " + funcVal
-		}
-	}
-
-	switch {
-	case f.DisableTimestamp:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m%s %-44s ", levelColor, levelText, caller, entry.Message)
-	case !f.FullTimestamp:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%04d]%s %-44s ", levelColor, levelText, int(entry.Time.Sub(baseTimestamp)/time.Second), caller, entry.Message)
-	default:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%s]%s %-44s ", levelColor, levelText, entry.Time.Format(timestampFormat), caller, entry.Message)
-	}
-	for _, k := range keys {
-		v := data[k]
-		fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=", levelColor, k)
-		f.appendValue(b, v)
-	}
-}
-
-func (f *TextFormatter) needsQuoting(text string) bool {
-	if f.ForceQuote {
-		return true
-	}
-	if f.QuoteEmptyFields && len(text) == 0 {
-		return true
-	}
-	if f.DisableQuote {
-		return false
-	}
-	for _, ch := range text {
-		if !((ch >= 'a' && ch <= 'z') ||
-			(ch >= 'A' && ch <= 'Z') ||
-			(ch >= '0' && ch <= '9') ||
-			ch == '-' || ch == '.' || ch == '_' || ch == '/' || ch == '@' || ch == '^' || ch == '+') {
-			return true
-		}
-	}
-	return false
-}
-
-func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
-	if b.Len() > 0 {
-		b.WriteByte(' ')
-	}
-	b.WriteString(key)
-	b.WriteByte('=')
-	f.appendValue(b, value)
-}
-
-func (f *TextFormatter) appendValue(b *bytes.Buffer, value interface{}) {
-	stringVal, ok := value.(string)
-	if !ok {
-		stringVal = fmt.Sprint(value)
-	}
-
-	if !f.needsQuoting(stringVal) {
-		b.WriteString(stringVal)
-	} else {
-		b.WriteString(fmt.Sprintf("%q", stringVal))
-	}
-}

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

@@ -1,70 +0,0 @@
-package logrus
-
-import (
-	"bufio"
-	"io"
-	"runtime"
-)
-
-// Writer at INFO level. See WriterLevel for details.
-func (logger *Logger) Writer() *io.PipeWriter {
-	return logger.WriterLevel(InfoLevel)
-}
-
-// WriterLevel returns an io.Writer that can be used to write arbitrary text to
-// the logger at the given log level. Each line written to the writer will be
-// printed in the usual way using formatters and hooks. The writer is part of an
-// io.Pipe and it is the callers responsibility to close the writer when done.
-// This can be used to override the standard library logger easily.
-func (logger *Logger) WriterLevel(level Level) *io.PipeWriter {
-	return NewEntry(logger).WriterLevel(level)
-}
-
-func (entry *Entry) Writer() *io.PipeWriter {
-	return entry.WriterLevel(InfoLevel)
-}
-
-func (entry *Entry) WriterLevel(level Level) *io.PipeWriter {
-	reader, writer := io.Pipe()
-
-	var printFunc func(args ...interface{})
-
-	switch level {
-	case TraceLevel:
-		printFunc = entry.Trace
-	case DebugLevel:
-		printFunc = entry.Debug
-	case InfoLevel:
-		printFunc = entry.Info
-	case WarnLevel:
-		printFunc = entry.Warn
-	case ErrorLevel:
-		printFunc = entry.Error
-	case FatalLevel:
-		printFunc = entry.Fatal
-	case PanicLevel:
-		printFunc = entry.Panic
-	default:
-		printFunc = entry.Print
-	}
-
-	go entry.writerScanner(reader, printFunc)
-	runtime.SetFinalizer(writer, writerFinalizer)
-
-	return writer
-}
-
-func (entry *Entry) writerScanner(reader *io.PipeReader, printFunc func(args ...interface{})) {
-	scanner := bufio.NewScanner(reader)
-	for scanner.Scan() {
-		printFunc(scanner.Text())
-	}
-	if err := scanner.Err(); err != nil {
-		entry.Errorf("Error while reading from Writer: %s", err)
-	}
-	reader.Close()
-}
-
-func writerFinalizer(writer *io.PipeWriter) {
-	writer.Close()
-}

vendor/go.uber.org/atomic/.codecov.yml

@@ -0,0 +1,19 @@
+coverage:
+  range: 80..100
+  round: down
+  precision: 2
+
+  status:
+    project:                   # measuring the overall project coverage
+      default:                 # context, you can create multiple ones with custom titles
+        enabled: yes           # must be yes|true to enable this status
+        target: 100            # specify the target coverage for each commit status
+                               #   option: "auto" (must increase from parent commit or pull request base)
+                               #   option: "X%" a static target percentage to hit
+        if_not_found: success  # if parent is not found report status as success, error, or failure
+        if_ci_failed: error    # if ci fails report status as success, error, or failure
+
+# Also update COVER_IGNORE_PKGS in the Makefile.
+ignore:
+  - /internal/gen-atomicint/
+  - /internal/gen-valuewrapper/

vendor/go.uber.org/atomic/.gitignore

@@ -0,0 +1,12 @@
+/bin
+.DS_Store
+/vendor
+cover.html
+cover.out
+lint.log
+
+# Binaries
+*.test
+
+# Profiling output
+*.prof

vendor/go.uber.org/atomic/.travis.yml

@@ -0,0 +1,27 @@
+sudo: false
+language: go
+go_import_path: go.uber.org/atomic
+
+env:
+  global:
+    - GO111MODULE=on
+
+matrix:
+  include:
+  - go: oldstable
+  - go: stable
+    env: LINT=1
+
+cache:
+  directories:
+    - vendor
+
+before_install:
+  - go version
+
+script:
+  - test -z "$LINT" || make lint
+  - make cover
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

vendor/go.uber.org/atomic/CHANGELOG.md

@@ -0,0 +1,76 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.7.0] - 2020-09-14
+### Added
+- Support JSON serialization and deserialization of primitive atomic types.
+- Support Text marshalling and unmarshalling for string atomics.
+
+### Changed
+- Disallow incorrect comparison of atomic values in a non-atomic way.
+
+### Removed
+- Remove dependency on `golang.org/x/{lint, tools}`.
+
+## [1.6.0] - 2020-02-24
+### Changed
+- Drop library dependency on `golang.org/x/{lint, tools}`.
+
+## [1.5.1] - 2019-11-19
+- Fix bug where `Bool.CAS` and `Bool.Toggle` do work correctly together
+  causing `CAS` to fail even though the old value matches.
+
+## [1.5.0] - 2019-10-29
+### Changed
+- With Go modules, only the `go.uber.org/atomic` import path is supported now.
+  If you need to use the old import path, please add a `replace` directive to
+  your `go.mod`.
+
+## [1.4.0] - 2019-05-01
+### Added
+ - Add `atomic.Error` type for atomic operations on `error` values.
+
+## [1.3.2] - 2018-05-02
+### Added
+- Add `atomic.Duration` type for atomic operations on `time.Duration` values.
+
+## [1.3.1] - 2017-11-14
+### Fixed
+- Revert optimization for `atomic.String.Store("")` which caused data races.
+
+## [1.3.0] - 2017-11-13
+### Added
+- Add `atomic.Bool.CAS` for compare-and-swap semantics on bools.
+
+### Changed
+- Optimize `atomic.String.Store("")` by avoiding an allocation.
+
+## [1.2.0] - 2017-04-12
+### Added
+- Shadow `atomic.Value` from `sync/atomic`.
+
+## [1.1.0] - 2017-03-10
+### Added
+- Add atomic `Float64` type.
+
+### Changed
+- Support new `go.uber.org/atomic` import path.
+
+## [1.0.0] - 2016-07-18
+
+- Initial release.
+
+[1.7.0]: https://github.com/uber-go/atomic/compare/v1.6.0...v1.7.0
+[1.6.0]: https://github.com/uber-go/atomic/compare/v1.5.1...v1.6.0
+[1.5.1]: https://github.com/uber-go/atomic/compare/v1.5.0...v1.5.1
+[1.5.0]: https://github.com/uber-go/atomic/compare/v1.4.0...v1.5.0
+[1.4.0]: https://github.com/uber-go/atomic/compare/v1.3.2...v1.4.0
+[1.3.2]: https://github.com/uber-go/atomic/compare/v1.3.1...v1.3.2
+[1.3.1]: https://github.com/uber-go/atomic/compare/v1.3.0...v1.3.1
+[1.3.0]: https://github.com/uber-go/atomic/compare/v1.2.0...v1.3.0
+[1.2.0]: https://github.com/uber-go/atomic/compare/v1.1.0...v1.2.0
+[1.1.0]: https://github.com/uber-go/atomic/compare/v1.0.0...v1.1.0
+[1.0.0]: https://github.com/uber-go/atomic/releases/tag/v1.0.0

vendor/go.uber.org/atomic/LICENSE.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2016 Uber Technologies, Inc.
+
+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/go.uber.org/atomic/Makefile

@@ -0,0 +1,78 @@
+# Directory to place `go install`ed binaries into.
+export GOBIN ?= $(shell pwd)/bin
+
+GOLINT = $(GOBIN)/golint
+GEN_ATOMICINT = $(GOBIN)/gen-atomicint
+GEN_ATOMICWRAPPER = $(GOBIN)/gen-atomicwrapper
+STATICCHECK = $(GOBIN)/staticcheck
+
+GO_FILES ?= $(shell find . '(' -path .git -o -path vendor ')' -prune -o -name '*.go' -print)
+
+# Also update ignore section in .codecov.yml.
+COVER_IGNORE_PKGS = \
+	go.uber.org/atomic/internal/gen-atomicint \
+	go.uber.org/atomic/internal/gen-atomicwrapper
+
+.PHONY: build
+build:
+	go build ./...
+
+.PHONY: test
+test:
+	go test -race ./...
+
+.PHONY: gofmt
+gofmt:
+	$(eval FMT_LOG := $(shell mktemp -t gofmt.XXXXX))
+	gofmt -e -s -l $(GO_FILES) > $(FMT_LOG) || true
+	@[ ! -s "$(FMT_LOG)" ] || (echo "gofmt failed:" && cat $(FMT_LOG) && false)
+
+$(GOLINT):
+	cd tools && go install golang.org/x/lint/golint
+
+$(STATICCHECK):
+	cd tools && go install honnef.co/go/tools/cmd/staticcheck
+
+$(GEN_ATOMICWRAPPER): $(wildcard ./internal/gen-atomicwrapper/*)
+	go build -o $@ ./internal/gen-atomicwrapper
+
+$(GEN_ATOMICINT): $(wildcard ./internal/gen-atomicint/*)
+	go build -o $@ ./internal/gen-atomicint
+
+.PHONY: golint
+golint: $(GOLINT)
+	$(GOLINT) ./...
+
+.PHONY: staticcheck
+staticcheck: $(STATICCHECK)
+	$(STATICCHECK) ./...
+
+.PHONY: lint
+lint: gofmt golint staticcheck generatenodirty
+
+# comma separated list of packages to consider for code coverage.
+COVER_PKG = $(shell \
+	go list -find ./... | \
+	grep -v $(foreach pkg,$(COVER_IGNORE_PKGS),-e "^$(pkg)$$") | \
+	paste -sd, -)
+
+.PHONY: cover
+cover:
+	go test -coverprofile=cover.out -coverpkg  $(COVER_PKG) -v ./...
+	go tool cover -html=cover.out -o cover.html
+
+.PHONY: generate
+generate: $(GEN_ATOMICINT) $(GEN_ATOMICWRAPPER)
+	go generate ./...
+
+.PHONY: generatenodirty
+generatenodirty:
+	@[ -z "$$(git status --porcelain)" ] || ( \
+		echo "Working tree is dirty. Commit your changes first."; \
+		exit 1 )
+	@make generate
+	@status=$$(git status --porcelain); \
+		[ -z "$$status" ] || ( \
+		echo "Working tree is dirty after `make generate`:"; \
+		echo "$$status"; \
+		echo "Please ensure that the generated code is up-to-date." )

vendor/go.uber.org/atomic/README.md

@@ -0,0 +1,63 @@
+# atomic [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![Go Report Card][reportcard-img]][reportcard]
+
+Simple wrappers for primitive types to enforce atomic access.
+
+## Installation
+
+```shell
+$ go get -u go.uber.org/atomic@v1
+```
+
+### Legacy Import Path
+
+As of v1.5.0, the import path `go.uber.org/atomic` is the only supported way
+of using this package. If you are using Go modules, this package will fail to
+compile with the legacy import path path `github.com/uber-go/atomic`.
+
+We recommend migrating your code to the new import path but if you're unable
+to do so, or if your dependencies are still using the old import path, you
+will have to add a `replace` directive to your `go.mod` file downgrading the
+legacy import path to an older version.
+
+```
+replace github.com/uber-go/atomic => github.com/uber-go/atomic v1.4.0
+```
+
+You can do so automatically by running the following command.
+
+```shell
+$ go mod edit -replace github.com/uber-go/atomic=github.com/uber-go/atomic@v1.4.0
+```
+
+## Usage
+
+The standard library's `sync/atomic` is powerful, but it's easy to forget which
+variables must be accessed atomically. `go.uber.org/atomic` preserves all the
+functionality of the standard library, but wraps the primitive types to
+provide a safer, more convenient API.
+
+```go
+var atom atomic.Uint32
+atom.Store(42)
+atom.Sub(2)
+atom.CAS(40, 11)
+```
+
+See the [documentation][doc] for a complete API specification.
+
+## Development Status
+
+Stable.
+
+---
+
+Released under the [MIT License](LICENSE.txt).
+
+[doc-img]: https://godoc.org/github.com/uber-go/atomic?status.svg
+[doc]: https://godoc.org/go.uber.org/atomic
+[ci-img]: https://travis-ci.com/uber-go/atomic.svg?branch=master
+[ci]: https://travis-ci.com/uber-go/atomic
+[cov-img]: https://codecov.io/gh/uber-go/atomic/branch/master/graph/badge.svg
+[cov]: https://codecov.io/gh/uber-go/atomic
+[reportcard-img]: https://goreportcard.com/badge/go.uber.org/atomic
+[reportcard]: https://goreportcard.com/report/go.uber.org/atomic

vendor/go.uber.org/atomic/bool.go

@@ -0,0 +1,81 @@
+// @generated Code generated by gen-atomicwrapper.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+)
+
+// Bool is an atomic type-safe wrapper for bool values.
+type Bool struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v Uint32
+}
+
+var _zeroBool bool
+
+// NewBool creates a new Bool.
+func NewBool(v bool) *Bool {
+	x := &Bool{}
+	if v != _zeroBool {
+		x.Store(v)
+	}
+	return x
+}
+
+// Load atomically loads the wrapped bool.
+func (x *Bool) Load() bool {
+	return truthy(x.v.Load())
+}
+
+// Store atomically stores the passed bool.
+func (x *Bool) Store(v bool) {
+	x.v.Store(boolToInt(v))
+}
+
+// CAS is an atomic compare-and-swap for bool values.
+func (x *Bool) CAS(o, n bool) bool {
+	return x.v.CAS(boolToInt(o), boolToInt(n))
+}
+
+// Swap atomically stores the given bool and returns the old
+// value.
+func (x *Bool) Swap(o bool) bool {
+	return truthy(x.v.Swap(boolToInt(o)))
+}
+
+// MarshalJSON encodes the wrapped bool into JSON.
+func (x *Bool) MarshalJSON() ([]byte, error) {
+	return json.Marshal(x.Load())
+}
+
+// UnmarshalJSON decodes a bool from JSON.
+func (x *Bool) UnmarshalJSON(b []byte) error {
+	var v bool
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	x.Store(v)
+	return nil
+}

vendor/go.uber.org/atomic/bool_ext.go

@@ -0,0 +1,53 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"strconv"
+)
+
+//go:generate bin/gen-atomicwrapper -name=Bool -type=bool -wrapped=Uint32 -pack=boolToInt -unpack=truthy -cas -swap -json -file=bool.go
+
+func truthy(n uint32) bool {
+	return n == 1
+}
+
+func boolToInt(b bool) uint32 {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+// Toggle atomically negates the Boolean and returns the previous value.
+func (b *Bool) Toggle() bool {
+	for {
+		old := b.Load()
+		if b.CAS(old, !old) {
+			return old
+		}
+	}
+}
+
+// String encodes the wrapped value as a string.
+func (b *Bool) String() string {
+	return strconv.FormatBool(b.Load())
+}

vendor/go.uber.org/atomic/doc.go

@@ -0,0 +1,23 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+// Package atomic provides simple wrappers around numerics to enforce atomic
+// access.
+package atomic

vendor/go.uber.org/atomic/duration.go

@@ -0,0 +1,82 @@
+// @generated Code generated by gen-atomicwrapper.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// Duration is an atomic type-safe wrapper for time.Duration values.
+type Duration struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v Int64
+}
+
+var _zeroDuration time.Duration
+
+// NewDuration creates a new Duration.
+func NewDuration(v time.Duration) *Duration {
+	x := &Duration{}
+	if v != _zeroDuration {
+		x.Store(v)
+	}
+	return x
+}
+
+// Load atomically loads the wrapped time.Duration.
+func (x *Duration) Load() time.Duration {
+	return time.Duration(x.v.Load())
+}
+
+// Store atomically stores the passed time.Duration.
+func (x *Duration) Store(v time.Duration) {
+	x.v.Store(int64(v))
+}
+
+// CAS is an atomic compare-and-swap for time.Duration values.
+func (x *Duration) CAS(o, n time.Duration) bool {
+	return x.v.CAS(int64(o), int64(n))
+}
+
+// Swap atomically stores the given time.Duration and returns the old
+// value.
+func (x *Duration) Swap(o time.Duration) time.Duration {
+	return time.Duration(x.v.Swap(int64(o)))
+}
+
+// MarshalJSON encodes the wrapped time.Duration into JSON.
+func (x *Duration) MarshalJSON() ([]byte, error) {
+	return json.Marshal(x.Load())
+}
+
+// UnmarshalJSON decodes a time.Duration from JSON.
+func (x *Duration) UnmarshalJSON(b []byte) error {
+	var v time.Duration
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	x.Store(v)
+	return nil
+}

vendor/go.uber.org/atomic/duration_ext.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import "time"
+
+//go:generate bin/gen-atomicwrapper -name=Duration -type=time.Duration -wrapped=Int64 -pack=int64 -unpack=time.Duration -cas -swap -json -imports time -file=duration.go
+
+// Add atomically adds to the wrapped time.Duration and returns the new value.
+func (d *Duration) Add(n time.Duration) time.Duration {
+	return time.Duration(d.v.Add(int64(n)))
+}
+
+// Sub atomically subtracts from the wrapped time.Duration and returns the new value.
+func (d *Duration) Sub(n time.Duration) time.Duration {
+	return time.Duration(d.v.Sub(int64(n)))
+}
+
+// String encodes the wrapped value as a string.
+func (d *Duration) String() string {
+	return d.Load().String()
+}

vendor/go.uber.org/atomic/error.go

@@ -0,0 +1,51 @@
+// @generated Code generated by gen-atomicwrapper.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+// Error is an atomic type-safe wrapper for error values.
+type Error struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v Value
+}
+
+var _zeroError error
+
+// NewError creates a new Error.
+func NewError(v error) *Error {
+	x := &Error{}
+	if v != _zeroError {
+		x.Store(v)
+	}
+	return x
+}
+
+// Load atomically loads the wrapped error.
+func (x *Error) Load() error {
+	return unpackError(x.v.Load())
+}
+
+// Store atomically stores the passed error.
+func (x *Error) Store(v error) {
+	x.v.Store(packError(v))
+}

vendor/go.uber.org/atomic/error_ext.go

@@ -0,0 +1,39 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+// atomic.Value panics on nil inputs, or if the underlying type changes.
+// Stabilize by always storing a custom struct that we control.
+
+//go:generate bin/gen-atomicwrapper -name=Error -type=error -wrapped=Value -pack=packError -unpack=unpackError -file=error.go
+
+type packedError struct{ Value error }
+
+func packError(v error) interface{} {
+	return packedError{v}
+}
+
+func unpackError(v interface{}) error {
+	if err, ok := v.(packedError); ok {
+		return err.Value
+	}
+	return nil
+}

vendor/go.uber.org/atomic/float64.go

@@ -0,0 +1,76 @@
+// @generated Code generated by gen-atomicwrapper.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"math"
+)
+
+// Float64 is an atomic type-safe wrapper for float64 values.
+type Float64 struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v Uint64
+}
+
+var _zeroFloat64 float64
+
+// NewFloat64 creates a new Float64.
+func NewFloat64(v float64) *Float64 {
+	x := &Float64{}
+	if v != _zeroFloat64 {
+		x.Store(v)
+	}
+	return x
+}
+
+// Load atomically loads the wrapped float64.
+func (x *Float64) Load() float64 {
+	return math.Float64frombits(x.v.Load())
+}
+
+// Store atomically stores the passed float64.
+func (x *Float64) Store(v float64) {
+	x.v.Store(math.Float64bits(v))
+}
+
+// CAS is an atomic compare-and-swap for float64 values.
+func (x *Float64) CAS(o, n float64) bool {
+	return x.v.CAS(math.Float64bits(o), math.Float64bits(n))
+}
+
+// MarshalJSON encodes the wrapped float64 into JSON.
+func (x *Float64) MarshalJSON() ([]byte, error) {
+	return json.Marshal(x.Load())
+}
+
+// UnmarshalJSON decodes a float64 from JSON.
+func (x *Float64) UnmarshalJSON(b []byte) error {
+	var v float64
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	x.Store(v)
+	return nil
+}

vendor/go.uber.org/atomic/float64_ext.go

@@ -0,0 +1,47 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import "strconv"
+
+//go:generate bin/gen-atomicwrapper -name=Float64 -type=float64 -wrapped=Uint64 -pack=math.Float64bits -unpack=math.Float64frombits -cas -json -imports math -file=float64.go
+
+// Add atomically adds to the wrapped float64 and returns the new value.
+func (f *Float64) Add(s float64) float64 {
+	for {
+		old := f.Load()
+		new := old + s
+		if f.CAS(old, new) {
+			return new
+		}
+	}
+}
+
+// Sub atomically subtracts from the wrapped float64 and returns the new value.
+func (f *Float64) Sub(s float64) float64 {
+	return f.Add(-s)
+}
+
+// String encodes the wrapped value as a string.
+func (f *Float64) String() string {
+	// 'g' is the behavior for floats with %v.
+	return strconv.FormatFloat(f.Load(), 'g', -1, 64)
+}

vendor/go.uber.org/atomic/gen.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+//go:generate bin/gen-atomicint -name=Int32 -wrapped=int32 -file=int32.go
+//go:generate bin/gen-atomicint -name=Int64 -wrapped=int64 -file=int64.go
+//go:generate bin/gen-atomicint -name=Uint32 -wrapped=uint32 -unsigned -file=uint32.go
+//go:generate bin/gen-atomicint -name=Uint64 -wrapped=uint64 -unsigned -file=uint64.go

vendor/go.uber.org/atomic/int32.go

@@ -0,0 +1,102 @@
+// @generated Code generated by gen-atomicint.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"strconv"
+	"sync/atomic"
+)
+
+// Int32 is an atomic wrapper around int32.
+type Int32 struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v int32
+}
+
+// NewInt32 creates a new Int32.
+func NewInt32(i int32) *Int32 {
+	return &Int32{v: i}
+}
+
+// Load atomically loads the wrapped value.
+func (i *Int32) Load() int32 {
+	return atomic.LoadInt32(&i.v)
+}
+
+// Add atomically adds to the wrapped int32 and returns the new value.
+func (i *Int32) Add(n int32) int32 {
+	return atomic.AddInt32(&i.v, n)
+}
+
+// Sub atomically subtracts from the wrapped int32 and returns the new value.
+func (i *Int32) Sub(n int32) int32 {
+	return atomic.AddInt32(&i.v, -n)
+}
+
+// Inc atomically increments the wrapped int32 and returns the new value.
+func (i *Int32) Inc() int32 {
+	return i.Add(1)
+}
+
+// Dec atomically decrements the wrapped int32 and returns the new value.
+func (i *Int32) Dec() int32 {
+	return i.Sub(1)
+}
+
+// CAS is an atomic compare-and-swap.
+func (i *Int32) CAS(old, new int32) bool {
+	return atomic.CompareAndSwapInt32(&i.v, old, new)
+}
+
+// Store atomically stores the passed value.
+func (i *Int32) Store(n int32) {
+	atomic.StoreInt32(&i.v, n)
+}
+
+// Swap atomically swaps the wrapped int32 and returns the old value.
+func (i *Int32) Swap(n int32) int32 {
+	return atomic.SwapInt32(&i.v, n)
+}
+
+// MarshalJSON encodes the wrapped int32 into JSON.
+func (i *Int32) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.Load())
+}
+
+// UnmarshalJSON decodes JSON into the wrapped int32.
+func (i *Int32) UnmarshalJSON(b []byte) error {
+	var v int32
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	i.Store(v)
+	return nil
+}
+
+// String encodes the wrapped value as a string.
+func (i *Int32) String() string {
+	v := i.Load()
+	return strconv.FormatInt(int64(v), 10)
+}

vendor/go.uber.org/atomic/int64.go

@@ -0,0 +1,102 @@
+// @generated Code generated by gen-atomicint.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"strconv"
+	"sync/atomic"
+)
+
+// Int64 is an atomic wrapper around int64.
+type Int64 struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v int64
+}
+
+// NewInt64 creates a new Int64.
+func NewInt64(i int64) *Int64 {
+	return &Int64{v: i}
+}
+
+// Load atomically loads the wrapped value.
+func (i *Int64) Load() int64 {
+	return atomic.LoadInt64(&i.v)
+}
+
+// Add atomically adds to the wrapped int64 and returns the new value.
+func (i *Int64) Add(n int64) int64 {
+	return atomic.AddInt64(&i.v, n)
+}
+
+// Sub atomically subtracts from the wrapped int64 and returns the new value.
+func (i *Int64) Sub(n int64) int64 {
+	return atomic.AddInt64(&i.v, -n)
+}
+
+// Inc atomically increments the wrapped int64 and returns the new value.
+func (i *Int64) Inc() int64 {
+	return i.Add(1)
+}
+
+// Dec atomically decrements the wrapped int64 and returns the new value.
+func (i *Int64) Dec() int64 {
+	return i.Sub(1)
+}
+
+// CAS is an atomic compare-and-swap.
+func (i *Int64) CAS(old, new int64) bool {
+	return atomic.CompareAndSwapInt64(&i.v, old, new)
+}
+
+// Store atomically stores the passed value.
+func (i *Int64) Store(n int64) {
+	atomic.StoreInt64(&i.v, n)
+}
+
+// Swap atomically swaps the wrapped int64 and returns the old value.
+func (i *Int64) Swap(n int64) int64 {
+	return atomic.SwapInt64(&i.v, n)
+}
+
+// MarshalJSON encodes the wrapped int64 into JSON.
+func (i *Int64) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.Load())
+}
+
+// UnmarshalJSON decodes JSON into the wrapped int64.
+func (i *Int64) UnmarshalJSON(b []byte) error {
+	var v int64
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	i.Store(v)
+	return nil
+}
+
+// String encodes the wrapped value as a string.
+func (i *Int64) String() string {
+	v := i.Load()
+	return strconv.FormatInt(int64(v), 10)
+}

vendor/go.uber.org/atomic/nocmp.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+// nocmp is an uncomparable struct. Embed this inside another struct to make
+// it uncomparable.
+//
+//  type Foo struct {
+//    nocmp
+//    // ...
+//  }
+//
+// This DOES NOT:
+//
+//  - Disallow shallow copies of structs
+//  - Disallow comparison of pointers to uncomparable structs
+type nocmp [0]func()

vendor/go.uber.org/atomic/string.go

@@ -0,0 +1,54 @@
+// @generated Code generated by gen-atomicwrapper.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+// String is an atomic type-safe wrapper for string values.
+type String struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v Value
+}
+
+var _zeroString string
+
+// NewString creates a new String.
+func NewString(v string) *String {
+	x := &String{}
+	if v != _zeroString {
+		x.Store(v)
+	}
+	return x
+}
+
+// Load atomically loads the wrapped string.
+func (x *String) Load() string {
+	if v := x.v.Load(); v != nil {
+		return v.(string)
+	}
+	return _zeroString
+}
+
+// Store atomically stores the passed string.
+func (x *String) Store(v string) {
+	x.v.Store(v)
+}

vendor/go.uber.org/atomic/string_ext.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+//go:generate bin/gen-atomicwrapper -name=String -type=string -wrapped=Value -file=string.go
+
+// String returns the wrapped value.
+func (s *String) String() string {
+	return s.Load()
+}
+
+// MarshalText encodes the wrapped string into a textual form.
+//
+// This makes it encodable as JSON, YAML, XML, and more.
+func (s *String) MarshalText() ([]byte, error) {
+	return []byte(s.Load()), nil
+}
+
+// UnmarshalText decodes text and replaces the wrapped string with it.
+//
+// This makes it decodable from JSON, YAML, XML, and more.
+func (s *String) UnmarshalText(b []byte) error {
+	s.Store(string(b))
+	return nil
+}

vendor/go.uber.org/atomic/uint32.go

@@ -0,0 +1,102 @@
+// @generated Code generated by gen-atomicint.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"strconv"
+	"sync/atomic"
+)
+
+// Uint32 is an atomic wrapper around uint32.
+type Uint32 struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v uint32
+}
+
+// NewUint32 creates a new Uint32.
+func NewUint32(i uint32) *Uint32 {
+	return &Uint32{v: i}
+}
+
+// Load atomically loads the wrapped value.
+func (i *Uint32) Load() uint32 {
+	return atomic.LoadUint32(&i.v)
+}
+
+// Add atomically adds to the wrapped uint32 and returns the new value.
+func (i *Uint32) Add(n uint32) uint32 {
+	return atomic.AddUint32(&i.v, n)
+}
+
+// Sub atomically subtracts from the wrapped uint32 and returns the new value.
+func (i *Uint32) Sub(n uint32) uint32 {
+	return atomic.AddUint32(&i.v, ^(n - 1))
+}
+
+// Inc atomically increments the wrapped uint32 and returns the new value.
+func (i *Uint32) Inc() uint32 {
+	return i.Add(1)
+}
+
+// Dec atomically decrements the wrapped uint32 and returns the new value.
+func (i *Uint32) Dec() uint32 {
+	return i.Sub(1)
+}
+
+// CAS is an atomic compare-and-swap.
+func (i *Uint32) CAS(old, new uint32) bool {
+	return atomic.CompareAndSwapUint32(&i.v, old, new)
+}
+
+// Store atomically stores the passed value.
+func (i *Uint32) Store(n uint32) {
+	atomic.StoreUint32(&i.v, n)
+}
+
+// Swap atomically swaps the wrapped uint32 and returns the old value.
+func (i *Uint32) Swap(n uint32) uint32 {
+	return atomic.SwapUint32(&i.v, n)
+}
+
+// MarshalJSON encodes the wrapped uint32 into JSON.
+func (i *Uint32) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.Load())
+}
+
+// UnmarshalJSON decodes JSON into the wrapped uint32.
+func (i *Uint32) UnmarshalJSON(b []byte) error {
+	var v uint32
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	i.Store(v)
+	return nil
+}
+
+// String encodes the wrapped value as a string.
+func (i *Uint32) String() string {
+	v := i.Load()
+	return strconv.FormatUint(uint64(v), 10)
+}

vendor/go.uber.org/atomic/uint64.go

@@ -0,0 +1,102 @@
+// @generated Code generated by gen-atomicint.
+
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import (
+	"encoding/json"
+	"strconv"
+	"sync/atomic"
+)
+
+// Uint64 is an atomic wrapper around uint64.
+type Uint64 struct {
+	_ nocmp // disallow non-atomic comparison
+
+	v uint64
+}
+
+// NewUint64 creates a new Uint64.
+func NewUint64(i uint64) *Uint64 {
+	return &Uint64{v: i}
+}
+
+// Load atomically loads the wrapped value.
+func (i *Uint64) Load() uint64 {
+	return atomic.LoadUint64(&i.v)
+}
+
+// Add atomically adds to the wrapped uint64 and returns the new value.
+func (i *Uint64) Add(n uint64) uint64 {
+	return atomic.AddUint64(&i.v, n)
+}
+
+// Sub atomically subtracts from the wrapped uint64 and returns the new value.
+func (i *Uint64) Sub(n uint64) uint64 {
+	return atomic.AddUint64(&i.v, ^(n - 1))
+}
+
+// Inc atomically increments the wrapped uint64 and returns the new value.
+func (i *Uint64) Inc() uint64 {
+	return i.Add(1)
+}
+
+// Dec atomically decrements the wrapped uint64 and returns the new value.
+func (i *Uint64) Dec() uint64 {
+	return i.Sub(1)
+}
+
+// CAS is an atomic compare-and-swap.
+func (i *Uint64) CAS(old, new uint64) bool {
+	return atomic.CompareAndSwapUint64(&i.v, old, new)
+}
+
+// Store atomically stores the passed value.
+func (i *Uint64) Store(n uint64) {
+	atomic.StoreUint64(&i.v, n)
+}
+
+// Swap atomically swaps the wrapped uint64 and returns the old value.
+func (i *Uint64) Swap(n uint64) uint64 {
+	return atomic.SwapUint64(&i.v, n)
+}
+
+// MarshalJSON encodes the wrapped uint64 into JSON.
+func (i *Uint64) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.Load())
+}
+
+// UnmarshalJSON decodes JSON into the wrapped uint64.
+func (i *Uint64) UnmarshalJSON(b []byte) error {
+	var v uint64
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	i.Store(v)
+	return nil
+}
+
+// String encodes the wrapped value as a string.
+func (i *Uint64) String() string {
+	v := i.Load()
+	return strconv.FormatUint(uint64(v), 10)
+}

vendor/go.uber.org/atomic/value.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// 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.
+
+package atomic
+
+import "sync/atomic"
+
+// Value shadows the type of the same name from sync/atomic
+// https://godoc.org/sync/atomic#Value
+type Value struct {
+	atomic.Value
+
+	_ nocmp // disallow non-atomic comparison
+}

vendor/go.uber.org/multierr/.codecov.yml

@@ -0,0 +1,15 @@
+coverage:
+  range: 80..100
+  round: down
+  precision: 2
+
+  status:
+    project:                   # measuring the overall project coverage
+      default:                 # context, you can create multiple ones with custom titles
+        enabled: yes           # must be yes|true to enable this status
+        target: 100            # specify the target coverage for each commit status
+                               #   option: "auto" (must increase from parent commit or pull request base)
+                               #   option: "X%" a static target percentage to hit
+        if_not_found: success  # if parent is not found report status as success, error, or failure
+        if_ci_failed: error    # if ci fails report status as success, error, or failure
+

vendor/go.uber.org/multierr/.gitignore

@@ -0,0 +1,4 @@
+/vendor
+cover.html
+cover.out
+/bin

vendor/go.uber.org/multierr/.travis.yml

@@ -0,0 +1,23 @@
+sudo: false
+language: go
+go_import_path: go.uber.org/multierr
+
+env:
+  global:
+    - GO111MODULE=on
+
+go:
+  - oldstable
+  - stable
+
+before_install:
+- go version
+
+script:
+- |
+  set -e
+  make lint
+  make cover
+
+after_success:
+- bash <(curl -s https://codecov.io/bash)

vendor/go.uber.org/multierr/CHANGELOG.md

@@ -0,0 +1,60 @@
+Releases
+========
+
+v1.6.0 (2020-09-14)
+===================
+
+-   Actually drop library dependency on development-time tooling.
+
+
+v1.5.0 (2020-02-24)
+===================
+
+-   Drop library dependency on development-time tooling.
+
+
+v1.4.0 (2019-11-04)
+===================
+
+-   Add `AppendInto` function to more ergonomically build errors inside a
+    loop.
+
+
+v1.3.0 (2019-10-29)
+===================
+
+-   Switch to Go modules.
+
+
+v1.2.0 (2019-09-26)
+===================
+
+-   Support extracting and matching against wrapped errors with `errors.As`
+    and `errors.Is`.
+
+
+v1.1.0 (2017-06-30)
+===================
+
+-   Added an `Errors(error) []error` function to extract the underlying list of
+    errors for a multierr error.
+
+
+v1.0.0 (2017-05-31)
+===================
+
+No changes since v0.2.0. This release is committing to making no breaking
+changes to the current API in the 1.X series.
+
+
+v0.2.0 (2017-04-11)
+===================
+
+-   Repeatedly appending to the same error is now faster due to fewer
+    allocations.
+
+
+v0.1.0 (2017-31-03)
+===================
+
+-   Initial release

vendor/go.uber.org/multierr/LICENSE.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2017 Uber Technologies, Inc.
+
+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/go.uber.org/multierr/Makefile

@@ -0,0 +1,42 @@
+# Directory to put `go install`ed binaries in.
+export GOBIN ?= $(shell pwd)/bin
+
+GO_FILES := $(shell \
+	find . '(' -path '*/.*' -o -path './vendor' ')' -prune \
+	-o -name '*.go' -print | cut -b3-)
+
+.PHONY: build
+build:
+	go build ./...
+
+.PHONY: test
+test:
+	go test -race ./...
+
+.PHONY: gofmt
+gofmt:
+	$(eval FMT_LOG := $(shell mktemp -t gofmt.XXXXX))
+	@gofmt -e -s -l $(GO_FILES) > $(FMT_LOG) || true
+	@[ ! -s "$(FMT_LOG)" ] || (echo "gofmt failed:" | cat - $(FMT_LOG) && false)
+
+.PHONY: golint
+golint:
+	@cd tools && go install golang.org/x/lint/golint
+	@$(GOBIN)/golint ./...
+
+.PHONY: staticcheck
+staticcheck:
+	@cd tools && go install honnef.co/go/tools/cmd/staticcheck
+	@$(GOBIN)/staticcheck ./...
+
+.PHONY: lint
+lint: gofmt golint staticcheck
+
+.PHONY: cover
+cover:
+	go test -coverprofile=cover.out -coverpkg=./... -v ./...
+	go tool cover -html=cover.out -o cover.html
+
+update-license:
+	@cd tools && go install go.uber.org/tools/update-license
+	@$(GOBIN)/update-license $(GO_FILES)

vendor/go.uber.org/multierr/README.md

@@ -0,0 +1,23 @@
+# multierr [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov]
+
+`multierr` allows combining one or more Go `error`s together.
+
+## Installation
+
+    go get -u go.uber.org/multierr
+
+## Status
+
+Stable: No breaking changes will be made before 2.0.
+
+-------------------------------------------------------------------------------
+
+Released under the [MIT License].
+
+[MIT License]: LICENSE.txt
+[doc-img]: https://godoc.org/go.uber.org/multierr?status.svg
+[doc]: https://godoc.org/go.uber.org/multierr
+[ci-img]: https://travis-ci.com/uber-go/multierr.svg?branch=master
+[cov-img]: https://codecov.io/gh/uber-go/multierr/branch/master/graph/badge.svg
+[ci]: https://travis-ci.com/uber-go/multierr
+[cov]: https://codecov.io/gh/uber-go/multierr

vendor/go.uber.org/multierr/error.go

@@ -0,0 +1,449 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// 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.
+
+// Package multierr allows combining one or more errors together.
+//
+// Overview
+//
+// Errors can be combined with the use of the Combine function.
+//
+// 	multierr.Combine(
+// 		reader.Close(),
+// 		writer.Close(),
+// 		conn.Close(),
+// 	)
+//
+// If only two errors are being combined, the Append function may be used
+// instead.
+//
+// 	err = multierr.Append(reader.Close(), writer.Close())
+//
+// This makes it possible to record resource cleanup failures from deferred
+// blocks with the help of named return values.
+//
+// 	func sendRequest(req Request) (err error) {
+// 		conn, err := openConnection()
+// 		if err != nil {
+// 			return err
+// 		}
+// 		defer func() {
+// 			err = multierr.Append(err, conn.Close())
+// 		}()
+// 		// ...
+// 	}
+//
+// The underlying list of errors for a returned error object may be retrieved
+// with the Errors function.
+//
+// 	errors := multierr.Errors(err)
+// 	if len(errors) > 0 {
+// 		fmt.Println("The following errors occurred:", errors)
+// 	}
+//
+// Advanced Usage
+//
+// Errors returned by Combine and Append MAY implement the following
+// interface.
+//
+// 	type errorGroup interface {
+// 		// Returns a slice containing the underlying list of errors.
+// 		//
+// 		// This slice MUST NOT be modified by the caller.
+// 		Errors() []error
+// 	}
+//
+// Note that if you need access to list of errors behind a multierr error, you
+// should prefer using the Errors function. That said, if you need cheap
+// read-only access to the underlying errors slice, you can attempt to cast
+// the error to this interface. You MUST handle the failure case gracefully
+// because errors returned by Combine and Append are not guaranteed to
+// implement this interface.
+//
+// 	var errors []error
+// 	group, ok := err.(errorGroup)
+// 	if ok {
+// 		errors = group.Errors()
+// 	} else {
+// 		errors = []error{err}
+// 	}
+package multierr // import "go.uber.org/multierr"
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"sync"
+
+	"go.uber.org/atomic"
+)
+
+var (
+	// Separator for single-line error messages.
+	_singlelineSeparator = []byte("; ")
+
+	// Prefix for multi-line messages
+	_multilinePrefix = []byte("the following errors occurred:")
+
+	// Prefix for the first and following lines of an item in a list of
+	// multi-line error messages.
+	//
+	// For example, if a single item is:
+	//
+	// 	foo
+	// 	bar
+	//
+	// It will become,
+	//
+	// 	 -  foo
+	// 	    bar
+	_multilineSeparator = []byte("\n -  ")
+	_multilineIndent    = []byte("    ")
+)
+
+// _bufferPool is a pool of bytes.Buffers.
+var _bufferPool = sync.Pool{
+	New: func() interface{} {
+		return &bytes.Buffer{}
+	},
+}
+
+type errorGroup interface {
+	Errors() []error
+}
+
+// Errors returns a slice containing zero or more errors that the supplied
+// error is composed of. If the error is nil, a nil slice is returned.
+//
+// 	err := multierr.Append(r.Close(), w.Close())
+// 	errors := multierr.Errors(err)
+//
+// If the error is not composed of other errors, the returned slice contains
+// just the error that was passed in.
+//
+// Callers of this function are free to modify the returned slice.
+func Errors(err error) []error {
+	if err == nil {
+		return nil
+	}
+
+	// Note that we're casting to multiError, not errorGroup. Our contract is
+	// that returned errors MAY implement errorGroup. Errors, however, only
+	// has special behavior for multierr-specific error objects.
+	//
+	// This behavior can be expanded in the future but I think it's prudent to
+	// start with as little as possible in terms of contract and possibility
+	// of misuse.
+	eg, ok := err.(*multiError)
+	if !ok {
+		return []error{err}
+	}
+
+	errors := eg.Errors()
+	result := make([]error, len(errors))
+	copy(result, errors)
+	return result
+}
+
+// multiError is an error that holds one or more errors.
+//
+// An instance of this is guaranteed to be non-empty and flattened. That is,
+// none of the errors inside multiError are other multiErrors.
+//
+// multiError formats to a semi-colon delimited list of error messages with
+// %v and with a more readable multi-line format with %+v.
+type multiError struct {
+	copyNeeded atomic.Bool
+	errors     []error
+}
+
+var _ errorGroup = (*multiError)(nil)
+
+// Errors returns the list of underlying errors.
+//
+// This slice MUST NOT be modified.
+func (merr *multiError) Errors() []error {
+	if merr == nil {
+		return nil
+	}
+	return merr.errors
+}
+
+func (merr *multiError) Error() string {
+	if merr == nil {
+		return ""
+	}
+
+	buff := _bufferPool.Get().(*bytes.Buffer)
+	buff.Reset()
+
+	merr.writeSingleline(buff)
+
+	result := buff.String()
+	_bufferPool.Put(buff)
+	return result
+}
+
+func (merr *multiError) Format(f fmt.State, c rune) {
+	if c == 'v' && f.Flag('+') {
+		merr.writeMultiline(f)
+	} else {
+		merr.writeSingleline(f)
+	}
+}
+
+func (merr *multiError) writeSingleline(w io.Writer) {
+	first := true
+	for _, item := range merr.errors {
+		if first {
+			first = false
+		} else {
+			w.Write(_singlelineSeparator)
+		}
+		io.WriteString(w, item.Error())
+	}
+}
+
+func (merr *multiError) writeMultiline(w io.Writer) {
+	w.Write(_multilinePrefix)
+	for _, item := range merr.errors {
+		w.Write(_multilineSeparator)
+		writePrefixLine(w, _multilineIndent, fmt.Sprintf("%+v", item))
+	}
+}
+
+// Writes s to the writer with the given prefix added before each line after
+// the first.
+func writePrefixLine(w io.Writer, prefix []byte, s string) {
+	first := true
+	for len(s) > 0 {
+		if first {
+			first = false
+		} else {
+			w.Write(prefix)
+		}
+
+		idx := strings.IndexByte(s, '\n')
+		if idx < 0 {
+			idx = len(s) - 1
+		}
+
+		io.WriteString(w, s[:idx+1])
+		s = s[idx+1:]
+	}
+}
+
+type inspectResult struct {
+	// Number of top-level non-nil errors
+	Count int
+
+	// Total number of errors including multiErrors
+	Capacity int
+
+	// Index of the first non-nil error in the list. Value is meaningless if
+	// Count is zero.
+	FirstErrorIdx int
+
+	// Whether the list contains at least one multiError
+	ContainsMultiError bool
+}
+
+// Inspects the given slice of errors so that we can efficiently allocate
+// space for it.
+func inspect(errors []error) (res inspectResult) {
+	first := true
+	for i, err := range errors {
+		if err == nil {
+			continue
+		}
+
+		res.Count++
+		if first {
+			first = false
+			res.FirstErrorIdx = i
+		}
+
+		if merr, ok := err.(*multiError); ok {
+			res.Capacity += len(merr.errors)
+			res.ContainsMultiError = true
+		} else {
+			res.Capacity++
+		}
+	}
+	return
+}
+
+// fromSlice converts the given list of errors into a single error.
+func fromSlice(errors []error) error {
+	res := inspect(errors)
+	switch res.Count {
+	case 0:
+		return nil
+	case 1:
+		// only one non-nil entry
+		return errors[res.FirstErrorIdx]
+	case len(errors):
+		if !res.ContainsMultiError {
+			// already flat
+			return &multiError{errors: errors}
+		}
+	}
+
+	nonNilErrs := make([]error, 0, res.Capacity)
+	for _, err := range errors[res.FirstErrorIdx:] {
+		if err == nil {
+			continue
+		}
+
+		if nested, ok := err.(*multiError); ok {
+			nonNilErrs = append(nonNilErrs, nested.errors...)
+		} else {
+			nonNilErrs = append(nonNilErrs, err)
+		}
+	}
+
+	return &multiError{errors: nonNilErrs}
+}
+
+// Combine combines the passed errors into a single error.
+//
+// If zero arguments were passed or if all items are nil, a nil error is
+// returned.
+//
+// 	Combine(nil, nil)  // == nil
+//
+// If only a single error was passed, it is returned as-is.
+//
+// 	Combine(err)  // == err
+//
+// Combine skips over nil arguments so this function may be used to combine
+// together errors from operations that fail independently of each other.
+//
+// 	multierr.Combine(
+// 		reader.Close(),
+// 		writer.Close(),
+// 		pipe.Close(),
+// 	)
+//
+// If any of the passed errors is a multierr error, it will be flattened along
+// with the other errors.
+//
+// 	multierr.Combine(multierr.Combine(err1, err2), err3)
+// 	// is the same as
+// 	multierr.Combine(err1, err2, err3)
+//
+// The returned error formats into a readable multi-line error message if
+// formatted with %+v.
+//
+// 	fmt.Sprintf("%+v", multierr.Combine(err1, err2))
+func Combine(errors ...error) error {
+	return fromSlice(errors)
+}
+
+// Append appends the given errors together. Either value may be nil.
+//
+// This function is a specialization of Combine for the common case where
+// there are only two errors.
+//
+// 	err = multierr.Append(reader.Close(), writer.Close())
+//
+// The following pattern may also be used to record failure of deferred
+// operations without losing information about the original error.
+//
+// 	func doSomething(..) (err error) {
+// 		f := acquireResource()
+// 		defer func() {
+// 			err = multierr.Append(err, f.Close())
+// 		}()
+func Append(left error, right error) error {
+	switch {
+	case left == nil:
+		return right
+	case right == nil:
+		return left
+	}
+
+	if _, ok := right.(*multiError); !ok {
+		if l, ok := left.(*multiError); ok && !l.copyNeeded.Swap(true) {
+			// Common case where the error on the left is constantly being
+			// appended to.
+			errs := append(l.errors, right)
+			return &multiError{errors: errs}
+		} else if !ok {
+			// Both errors are single errors.
+			return &multiError{errors: []error{left, right}}
+		}
+	}
+
+	// Either right or both, left and right, are multiErrors. Rely on usual
+	// expensive logic.
+	errors := [2]error{left, right}
+	return fromSlice(errors[0:])
+}
+
+// AppendInto appends an error into the destination of an error pointer and
+// returns whether the error being appended was non-nil.
+//
+// 	var err error
+// 	multierr.AppendInto(&err, r.Close())
+// 	multierr.AppendInto(&err, w.Close())
+//
+// The above is equivalent to,
+//
+// 	err := multierr.Append(r.Close(), w.Close())
+//
+// As AppendInto reports whether the provided error was non-nil, it may be
+// used to build a multierr error in a loop more ergonomically. For example:
+//
+// 	var err error
+// 	for line := range lines {
+// 		var item Item
+// 		if multierr.AppendInto(&err, parse(line, &item)) {
+// 			continue
+// 		}
+// 		items = append(items, item)
+// 	}
+//
+// Compare this with a verison that relies solely on Append:
+//
+// 	var err error
+// 	for line := range lines {
+// 		var item Item
+// 		if parseErr := parse(line, &item); parseErr != nil {
+// 			err = multierr.Append(err, parseErr)
+// 			continue
+// 		}
+// 		items = append(items, item)
+// 	}
+func AppendInto(into *error, err error) (errored bool) {
+	if into == nil {
+		// We panic if 'into' is nil. This is not documented above
+		// because suggesting that the pointer must be non-nil may
+		// confuse users into thinking that the error that it points
+		// to must be non-nil.
+		panic("misuse of multierr.AppendInto: into pointer must not be nil")
+	}
+
+	if err == nil {
+		return false
+	}
+	*into = Append(*into, err)
+	return true
+}

vendor/go.uber.org/multierr/glide.yaml

@@ -0,0 +1,8 @@
+package: go.uber.org/multierr
+import:
+- package: go.uber.org/atomic
+  version: ^1
+testImport:
+- package: github.com/stretchr/testify
+  subpackages:
+  - assert

vendor/go.uber.org/multierr/go113.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// 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.
+
+// +build go1.13
+
+package multierr
+
+import "errors"
+
+// As attempts to find the first error in the error list that matches the type
+// of the value that target points to.
+//
+// This function allows errors.As to traverse the values stored on the
+// multierr error.
+func (merr *multiError) As(target interface{}) bool {
+	for _, err := range merr.Errors() {
+		if errors.As(err, target) {
+			return true
+		}
+	}
+	return false
+}
+
+// Is attempts to match the provided error against errors in the error list.
+//
+// This function allows errors.Is to traverse the values stored on the
+// multierr error.
+func (merr *multiError) Is(target error) bool {
+	for _, err := range merr.Errors() {
+		if errors.Is(err, target) {
+			return true
+		}
+	}
+	return false
+}

vendor/go.uber.org/zap/.codecov.yml

@@ -0,0 +1,17 @@
+coverage:
+  range: 80..100
+  round: down
+  precision: 2
+
+  status:
+    project:                   # measuring the overall project coverage
+      default:                 # context, you can create multiple ones with custom titles
+        enabled: yes           # must be yes|true to enable this status
+        target: 95%            # specify the target coverage for each commit status
+                               #   option: "auto" (must increase from parent commit or pull request base)
+                               #   option: "X%" a static target percentage to hit
+        if_not_found: success  # if parent is not found report status as success, error, or failure
+        if_ci_failed: error    # if ci fails report status as success, error, or failure
+ignore:
+  - internal/readme/readme.go
+

vendor/go.uber.org/zap/.gitignore

@@ -0,0 +1,32 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+vendor
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+*.pprof
+*.out
+*.log
+
+/bin
+cover.out
+cover.html

vendor/go.uber.org/zap/.readme.tmpl

@@ -0,0 +1,109 @@
+# :zap: zap [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov]
+
+Blazing fast, structured, leveled logging in Go.
+
+## Installation
+
+`go get -u go.uber.org/zap`
+
+Note that zap only supports the two most recent minor versions of Go.
+
+## Quick Start
+
+In contexts where performance is nice, but not critical, use the
+`SugaredLogger`. It's 4-10x faster than other structured logging
+packages and includes both structured and `printf`-style APIs.
+
+```go
+logger, _ := zap.NewProduction()
+defer logger.Sync() // flushes buffer, if any
+sugar := logger.Sugar()
+sugar.Infow("failed to fetch URL",
+  // Structured context as loosely typed key-value pairs.
+  "url", url,
+  "attempt", 3,
+  "backoff", time.Second,
+)
+sugar.Infof("Failed to fetch URL: %s", url)
+```
+
+When performance and type safety are critical, use the `Logger`. It's even
+faster than the `SugaredLogger` and allocates far less, but it only supports
+structured logging.
+
+```go
+logger, _ := zap.NewProduction()
+defer logger.Sync()
+logger.Info("failed to fetch URL",
+  // Structured context as strongly typed Field values.
+  zap.String("url", url),
+  zap.Int("attempt", 3),
+  zap.Duration("backoff", time.Second),
+)
+```
+
+See the [documentation][doc] and [FAQ](FAQ.md) for more details.
+
+## Performance
+
+For applications that log in the hot path, reflection-based serialization and
+string formatting are prohibitively expensive — they're CPU-intensive
+and make many small allocations. Put differently, using `encoding/json` and
+`fmt.Fprintf` to log tons of `interface{}`s makes your application slow.
+
+Zap takes a different approach. It includes a reflection-free, zero-allocation
+JSON encoder, and the base `Logger` strives to avoid serialization overhead
+and allocations wherever possible. By building the high-level `SugaredLogger`
+on that foundation, zap lets users *choose* when they need to count every
+allocation and when they'd prefer a more familiar, loosely typed API.
+
+As measured by its own [benchmarking suite][], not only is zap more performant
+than comparable structured logging packages — it's also faster than the
+standard library. Like all benchmarks, take these with a grain of salt.<sup
+id="anchor-versions">[1](#footnote-versions)</sup>
+
+Log a message and 10 fields:
+
+{{.BenchmarkAddingFields}}
+
+Log a message with a logger that already has 10 fields of context:
+
+{{.BenchmarkAccumulatedContext}}
+
+Log a static string, without any context or `printf`-style templating:
+
+{{.BenchmarkWithoutFields}}
+
+## Development Status: Stable
+
+All APIs are finalized, and no breaking changes will be made in the 1.x series
+of releases. Users of semver-aware dependency management systems should pin
+zap to `^1`.
+
+## Contributing
+
+We encourage and support an active, healthy community of contributors &mdash;
+including you! Details are in the [contribution guide](CONTRIBUTING.md) and
+the [code of conduct](CODE_OF_CONDUCT.md). The zap maintainers keep an eye on
+issues and pull requests, but you can also report any negative conduct to
+oss-conduct@uber.com. That email list is a private, safe space; even the zap
+maintainers don't have access, so don't hesitate to hold us to a high
+standard.
+
+<hr>
+
+Released under the [MIT License](LICENSE.txt).
+
+<sup id="footnote-versions">1</sup> In particular, keep in mind that we may be
+benchmarking against slightly older versions of other packages. Versions are
+pinned in zap's [glide.lock][] file. [↩](#anchor-versions)
+
+[doc-img]: https://godoc.org/go.uber.org/zap?status.svg
+[doc]: https://godoc.org/go.uber.org/zap
+[ci-img]: https://travis-ci.com/uber-go/zap.svg?branch=master
+[ci]: https://travis-ci.com/uber-go/zap
+[cov-img]: https://codecov.io/gh/uber-go/zap/branch/master/graph/badge.svg
+[cov]: https://codecov.io/gh/uber-go/zap
+[benchmarking suite]: https://github.com/uber-go/zap/tree/master/benchmarks
+[glide.lock]: https://github.com/uber-go/zap/blob/master/glide.lock
+

vendor/go.uber.org/zap/CHANGELOG.md

@@ -0,0 +1,516 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## 1.19.1 (8 Sep 2021)
+
+### Fixed
+* [#1001][]: JSON: Fix complex number encoding with negative imaginary part. Thanks to @hemantjadon.
+* [#1003][]: JSON: Fix inaccurate precision when encoding float32.
+
+[#1001]: https://github.com/uber-go/zap/pull/1001
+[#1003]: https://github.com/uber-go/zap/pull/1003
+
+## 1.19.0 (9 Aug 2021)
+
+Enhancements:
+* [#975][]: Avoid panicking in Sampler core if the level is out of bounds.
+* [#984][]: Reduce the size of BufferedWriteSyncer by aligning the fields
+  better.
+
+[#975]: https://github.com/uber-go/zap/pull/975
+[#984]: https://github.com/uber-go/zap/pull/984
+
+Thanks to @lancoLiu and @thockin for their contributions to this release.
+
+## 1.18.1 (28 Jun 2021)
+
+Bugfixes:
+* [#974][]: Fix nil dereference in logger constructed by `zap.NewNop`.
+
+[#974]: https://github.com/uber-go/zap/pull/974
+
+## 1.18.0 (28 Jun 2021)
+
+Enhancements:
+* [#961][]: Add `zapcore.BufferedWriteSyncer`, a new `WriteSyncer` that buffers
+  messages in-memory and flushes them periodically.
+* [#971][]: Add `zapio.Writer` to use a Zap logger as an `io.Writer`.
+* [#897][]: Add `zap.WithClock` option to control the source of time via the
+  new `zapcore.Clock` interface.
+* [#949][]: Avoid panicking in `zap.SugaredLogger` when arguments of `*w`
+  methods don't match expectations.
+* [#943][]: Add support for filtering by level or arbitrary matcher function to
+  `zaptest/observer`.
+* [#691][]: Comply with `io.StringWriter` and `io.ByteWriter` in Zap's
+  `buffer.Buffer`.
+
+Thanks to @atrn0, @ernado, @heyanfu, @hnlq715, @zchee
+for their contributions to this release.
+
+[#691]: https://github.com/uber-go/zap/pull/691
+[#897]: https://github.com/uber-go/zap/pull/897
+[#943]: https://github.com/uber-go/zap/pull/943
+[#949]: https://github.com/uber-go/zap/pull/949
+[#961]: https://github.com/uber-go/zap/pull/961
+[#971]: https://github.com/uber-go/zap/pull/971
+
+## 1.17.0 (25 May 2021)
+
+Bugfixes:
+* [#867][]: Encode `<nil>` for nil `error` instead of a panic.
+* [#931][], [#936][]: Update minimum version constraints to address
+  vulnerabilities in dependencies.
+
+Enhancements:
+* [#865][]: Improve alignment of fields of the Logger struct, reducing its
+  size from 96 to 80 bytes.
+* [#881][]: Support `grpclog.LoggerV2` in zapgrpc.
+* [#903][]: Support URL-encoded POST requests to the AtomicLevel HTTP handler
+  with the `application/x-www-form-urlencoded` content type.
+* [#912][]: Support multi-field encoding with `zap.Inline`.
+* [#913][]: Speed up SugaredLogger for calls with a single string.
+* [#928][]: Add support for filtering by field name to `zaptest/observer`.
+
+Thanks to @ash2k, @FMLS, @jimmystewpot, @Oncilla, @tsoslow, @tylitianrui, @withshubh, and @wziww for their contributions to this release.
+
+## 1.16.0 (1 Sep 2020)
+
+Bugfixes:
+* [#828][]: Fix missing newline in IncreaseLevel error messages.
+* [#835][]: Fix panic in JSON encoder when encoding times or durations
+  without specifying a time or duration encoder.
+* [#843][]: Honor CallerSkip when taking stack traces.
+* [#862][]: Fix the default file permissions to use `0666` and rely on the umask instead.
+* [#854][]: Encode `<nil>` for nil `Stringer` instead of a panic error log.
+
+Enhancements:
+* [#629][]: Added `zapcore.TimeEncoderOfLayout` to easily create time encoders
+  for custom layouts.
+* [#697][]: Added support for a configurable delimiter in the console encoder.
+* [#852][]: Optimize console encoder by pooling the underlying JSON encoder.
+* [#844][]: Add ability to include the calling function as part of logs.
+* [#843][]: Add `StackSkip` for including truncated stacks as a field.
+* [#861][]: Add options to customize Fatal behaviour for better testability.
+
+Thanks to @SteelPhase, @tmshn, @lixingwang, @wyxloading, @moul, @segevfiner, @andy-retailnext and @jcorbin for their contributions to this release.
+
+## 1.15.0 (23 Apr 2020)
+
+Bugfixes:
+* [#804][]: Fix handling of `Time` values out of `UnixNano` range.
+* [#812][]: Fix `IncreaseLevel` being reset after a call to `With`.
+
+Enhancements:
+* [#806][]: Add `WithCaller` option to supersede the `AddCaller` option. This
+  allows disabling annotation of log entries with caller information if
+  previously enabled with `AddCaller`.
+* [#813][]: Deprecate `NewSampler` constructor in favor of
+  `NewSamplerWithOptions` which supports a `SamplerHook` option. This option
+   adds support for monitoring sampling decisions through a hook.
+
+Thanks to @danielbprice for their contributions to this release.
+
+## 1.14.1 (14 Mar 2020)
+
+Bugfixes:
+* [#791][]: Fix panic on attempting to build a logger with an invalid Config.
+* [#795][]: Vendoring Zap with `go mod vendor` no longer includes Zap's
+  development-time dependencies.
+* [#799][]: Fix issue introduced in 1.14.0 that caused invalid JSON output to
+  be generated for arrays of `time.Time` objects when using string-based time
+  formats.
+
+Thanks to @YashishDua for their contributions to this release.
+
+## 1.14.0 (20 Feb 2020)
+
+Enhancements:
+* [#771][]: Optimize calls for disabled log levels.
+* [#773][]: Add millisecond duration encoder.
+* [#775][]: Add option to increase the level of a logger.
+* [#786][]: Optimize time formatters using `Time.AppendFormat` where possible.
+
+Thanks to @caibirdme for their contributions to this release.
+
+## 1.13.0 (13 Nov 2019)
+
+Enhancements:
+* [#758][]: Add `Intp`, `Stringp`, and other similar `*p` field constructors
+  to log pointers to primitives with support for `nil` values.
+
+Thanks to @jbizzle for their contributions to this release.
+
+## 1.12.0 (29 Oct 2019)
+
+Enhancements:
+* [#751][]: Migrate to Go modules.
+
+## 1.11.0 (21 Oct 2019)
+
+Enhancements:
+* [#725][]: Add `zapcore.OmitKey` to omit keys in an `EncoderConfig`.
+* [#736][]: Add `RFC3339` and `RFC3339Nano` time encoders.
+
+Thanks to @juicemia, @uhthomas for their contributions to this release.
+
+## 1.10.0 (29 Apr 2019)
+
+Bugfixes:
+* [#657][]: Fix `MapObjectEncoder.AppendByteString` not adding value as a
+  string.
+* [#706][]: Fix incorrect call depth to determine caller in Go 1.12.
+
+Enhancements:
+* [#610][]: Add `zaptest.WrapOptions` to wrap `zap.Option` for creating test
+  loggers.
+* [#675][]: Don't panic when encoding a String field.
+* [#704][]: Disable HTML escaping for JSON objects encoded using the
+  reflect-based encoder.
+
+Thanks to @iaroslav-ciupin, @lelenanam, @joa, @NWilson for their contributions
+to this release.
+
+## v1.9.1 (06 Aug 2018)
+
+Bugfixes:
+
+* [#614][]: MapObjectEncoder should not ignore empty slices.
+
+## v1.9.0 (19 Jul 2018)
+
+Enhancements:
+* [#602][]: Reduce number of allocations when logging with reflection.
+* [#572][], [#606][]: Expose a registry for third-party logging sinks.
+
+Thanks to @nfarah86, @AlekSi, @JeanMertz, @philippgille, @etsangsplk, and
+@dimroc for their contributions to this release.
+
+## v1.8.0 (13 Apr 2018)
+
+Enhancements:
+* [#508][]: Make log level configurable when redirecting the standard
+  library's logger.
+* [#518][]: Add a logger that writes to a `*testing.TB`.
+* [#577][]: Add a top-level alias for `zapcore.Field` to clean up GoDoc.
+
+Bugfixes:
+* [#574][]: Add a missing import comment to `go.uber.org/zap/buffer`.
+
+Thanks to @DiSiqueira and @djui for their contributions to this release.
+
+## v1.7.1 (25 Sep 2017)
+
+Bugfixes:
+* [#504][]: Store strings when using AddByteString with the map encoder.
+
+## v1.7.0 (21 Sep 2017)
+
+Enhancements:
+
+* [#487][]: Add `NewStdLogAt`, which extends `NewStdLog` by allowing the user
+  to specify the level of the logged messages.
+
+## v1.6.0 (30 Aug 2017)
+
+Enhancements:
+
+* [#491][]: Omit zap stack frames from stacktraces.
+* [#490][]: Add a `ContextMap` method to observer logs for simpler
+  field validation in tests.
+
+## v1.5.0 (22 Jul 2017)
+
+Enhancements:
+
+* [#460][] and [#470][]: Support errors produced by `go.uber.org/multierr`.
+* [#465][]: Support user-supplied encoders for logger names.
+
+Bugfixes:
+
+* [#477][]: Fix a bug that incorrectly truncated deep stacktraces.
+
+Thanks to @richard-tunein and @pavius for their contributions to this release.
+
+## v1.4.1 (08 Jun 2017)
+
+This release fixes two bugs.
+
+Bugfixes:
+
+* [#435][]: Support a variety of case conventions when unmarshaling levels.
+* [#444][]: Fix a panic in the observer.
+
+## v1.4.0 (12 May 2017)
+
+This release adds a few small features and is fully backward-compatible.
+
+Enhancements:
+
+* [#424][]: Add a `LineEnding` field to `EncoderConfig`, allowing users to
+  override the Unix-style default.
+* [#425][]: Preserve time zones when logging times.
+* [#431][]: Make `zap.AtomicLevel` implement `fmt.Stringer`, which makes a
+  variety of operations a bit simpler.
+
+## v1.3.0 (25 Apr 2017)
+
+This release adds an enhancement to zap's testing helpers as well as the
+ability to marshal an AtomicLevel. It is fully backward-compatible.
+
+Enhancements:
+
+* [#415][]: Add a substring-filtering helper to zap's observer. This is
+  particularly useful when testing the `SugaredLogger`.
+* [#416][]: Make `AtomicLevel` implement `encoding.TextMarshaler`.
+
+## v1.2.0 (13 Apr 2017)
+
+This release adds a gRPC compatibility wrapper. It is fully backward-compatible.
+
+Enhancements:
+
+* [#402][]: Add a `zapgrpc` package that wraps zap's Logger and implements
+  `grpclog.Logger`.
+
+## v1.1.0 (31 Mar 2017)
+
+This release fixes two bugs and adds some enhancements to zap's testing helpers.
+It is fully backward-compatible.
+
+Bugfixes:
+
+* [#385][]: Fix caller path trimming on Windows.
+* [#396][]: Fix a panic when attempting to use non-existent directories with
+  zap's configuration struct.
+
+Enhancements:
+
+* [#386][]: Add filtering helpers to zaptest's observing logger.
+
+Thanks to @moitias for contributing to this release.
+
+## v1.0.0 (14 Mar 2017)
+
+This is zap's first stable release. All exported APIs are now final, and no
+further breaking changes will be made in the 1.x release series. Anyone using a
+semver-aware dependency manager should now pin to `^1`.
+
+Breaking changes:
+
+* [#366][]: Add byte-oriented APIs to encoders to log UTF-8 encoded text without
+  casting from `[]byte` to `string`.
+* [#364][]: To support buffering outputs, add `Sync` methods to `zapcore.Core`,
+  `zap.Logger`, and `zap.SugaredLogger`.
+* [#371][]: Rename the `testutils` package to `zaptest`, which is less likely to
+  clash with other testing helpers.
+
+Bugfixes:
+
+* [#362][]: Make the ISO8601 time formatters fixed-width, which is friendlier
+  for tab-separated console output.
+* [#369][]: Remove the automatic locks in `zapcore.NewCore`, which allows zap to
+  work with concurrency-safe `WriteSyncer` implementations.
+* [#347][]: Stop reporting errors when trying to `fsync` standard out on Linux
+  systems.
+* [#373][]: Report the correct caller from zap's standard library
+  interoperability wrappers.
+
+Enhancements:
+
+* [#348][]: Add a registry allowing third-party encodings to work with zap's
+  built-in `Config`.
+* [#327][]: Make the representation of logger callers configurable (like times,
+  levels, and durations).
+* [#376][]: Allow third-party encoders to use their own buffer pools, which
+  removes the last performance advantage that zap's encoders have over plugins.
+* [#346][]: Add `CombineWriteSyncers`, a convenience function to tee multiple
+  `WriteSyncer`s and lock the result.
+* [#365][]: Make zap's stacktraces compatible with mid-stack inlining (coming in
+  Go 1.9).
+* [#372][]: Export zap's observing logger as `zaptest/observer`. This makes it
+  easier for particularly punctilious users to unit test their application's
+  logging.
+
+Thanks to @suyash, @htrendev, @flisky, @Ulexus, and @skipor for their
+contributions to this release.
+
+## v1.0.0-rc.3 (7 Mar 2017)
+
+This is the third release candidate for zap's stable release. There are no
+breaking changes.
+
+Bugfixes:
+
+* [#339][]: Byte slices passed to `zap.Any` are now correctly treated as binary blobs
+  rather than `[]uint8`.
+
+Enhancements:
+
+* [#307][]: Users can opt into colored output for log levels.
+* [#353][]: In addition to hijacking the output of the standard library's
+  package-global logging functions, users can now construct a zap-backed
+  `log.Logger` instance.
+* [#311][]: Frames from common runtime functions and some of zap's internal
+  machinery are now omitted from stacktraces.
+
+Thanks to @ansel1 and @suyash for their contributions to this release.
+
+## v1.0.0-rc.2 (21 Feb 2017)
+
+This is the second release candidate for zap's stable release. It includes two
+breaking changes.
+
+Breaking changes:
+
+* [#316][]: Zap's global loggers are now fully concurrency-safe
+  (previously, users had to ensure that `ReplaceGlobals` was called before the
+  loggers were in use). However, they must now be accessed via the `L()` and
+  `S()` functions. Users can update their projects with
+
+  ```
+  gofmt -r "zap.L -> zap.L()" -w .
+  gofmt -r "zap.S -> zap.S()" -w .
+  ```
+* [#309][] and [#317][]: RC1 was mistakenly shipped with invalid
+  JSON and YAML struct tags on all config structs. This release fixes the tags
+  and adds static analysis to prevent similar bugs in the future.
+
+Bugfixes:
+
+* [#321][]: Redirecting the standard library's `log` output now
+  correctly reports the logger's caller.
+
+Enhancements:
+
+* [#325][] and [#333][]: Zap now transparently supports non-standard, rich
+  errors like those produced by `github.com/pkg/errors`.
+* [#326][]: Though `New(nil)` continues to return a no-op logger, `NewNop()` is
+  now preferred. Users can update their projects with `gofmt -r 'zap.New(nil) ->
+  zap.NewNop()' -w .`.
+* [#300][]: Incorrectly importing zap as `github.com/uber-go/zap` now returns a
+  more informative error.
+
+Thanks to @skipor and @chapsuk for their contributions to this release.
+
+## v1.0.0-rc.1 (14 Feb 2017)
+
+This is the first release candidate for zap's stable release. There are multiple
+breaking changes and improvements from the pre-release version. Most notably:
+
+* **Zap's import path is now "go.uber.org/zap"** &mdash; all users will
+  need to update their code.
+* User-facing types and functions remain in the `zap` package. Code relevant
+  largely to extension authors is now in the `zapcore` package.
+* The `zapcore.Core` type makes it easy for third-party packages to use zap's
+  internals but provide a different user-facing API.
+* `Logger` is now a concrete type instead of an interface.
+* A less verbose (though slower) logging API is included by default.
+* Package-global loggers `L` and `S` are included.
+* A human-friendly console encoder is included.
+* A declarative config struct allows common logger configurations to be managed
+  as configuration instead of code.
+* Sampling is more accurate, and doesn't depend on the standard library's shared
+  timer heap.
+
+## v0.1.0-beta.1 (6 Feb 2017)
+
+This is a minor version, tagged to allow users to pin to the pre-1.0 APIs and
+upgrade at their leisure. Since this is the first tagged release, there are no
+backward compatibility concerns and all functionality is new.
+
+Early zap adopters should pin to the 0.1.x minor version until they're ready to
+upgrade to the upcoming stable release.
+
+[#316]: https://github.com/uber-go/zap/pull/316
+[#309]: https://github.com/uber-go/zap/pull/309
+[#317]: https://github.com/uber-go/zap/pull/317
+[#321]: https://github.com/uber-go/zap/pull/321
+[#325]: https://github.com/uber-go/zap/pull/325
+[#333]: https://github.com/uber-go/zap/pull/333
+[#326]: https://github.com/uber-go/zap/pull/326
+[#300]: https://github.com/uber-go/zap/pull/300
+[#339]: https://github.com/uber-go/zap/pull/339
+[#307]: https://github.com/uber-go/zap/pull/307
+[#353]: https://github.com/uber-go/zap/pull/353
+[#311]: https://github.com/uber-go/zap/pull/311
+[#366]: https://github.com/uber-go/zap/pull/366
+[#364]: https://github.com/uber-go/zap/pull/364
+[#371]: https://github.com/uber-go/zap/pull/371
+[#362]: https://github.com/uber-go/zap/pull/362
+[#369]: https://github.com/uber-go/zap/pull/369
+[#347]: https://github.com/uber-go/zap/pull/347
+[#373]: https://github.com/uber-go/zap/pull/373
+[#348]: https://github.com/uber-go/zap/pull/348
+[#327]: https://github.com/uber-go/zap/pull/327
+[#376]: https://github.com/uber-go/zap/pull/376
+[#346]: https://github.com/uber-go/zap/pull/346
+[#365]: https://github.com/uber-go/zap/pull/365
+[#372]: https://github.com/uber-go/zap/pull/372
+[#385]: https://github.com/uber-go/zap/pull/385
+[#396]: https://github.com/uber-go/zap/pull/396
+[#386]: https://github.com/uber-go/zap/pull/386
+[#402]: https://github.com/uber-go/zap/pull/402
+[#415]: https://github.com/uber-go/zap/pull/415
+[#416]: https://github.com/uber-go/zap/pull/416
+[#424]: https://github.com/uber-go/zap/pull/424
+[#425]: https://github.com/uber-go/zap/pull/425
+[#431]: https://github.com/uber-go/zap/pull/431
+[#435]: https://github.com/uber-go/zap/pull/435
+[#444]: https://github.com/uber-go/zap/pull/444
+[#477]: https://github.com/uber-go/zap/pull/477
+[#465]: https://github.com/uber-go/zap/pull/465
+[#460]: https://github.com/uber-go/zap/pull/460
+[#470]: https://github.com/uber-go/zap/pull/470
+[#487]: https://github.com/uber-go/zap/pull/487
+[#490]: https://github.com/uber-go/zap/pull/490
+[#491]: https://github.com/uber-go/zap/pull/491
+[#504]: https://github.com/uber-go/zap/pull/504
+[#508]: https://github.com/uber-go/zap/pull/508
+[#518]: https://github.com/uber-go/zap/pull/518
+[#577]: https://github.com/uber-go/zap/pull/577
+[#574]: https://github.com/uber-go/zap/pull/574
+[#602]: https://github.com/uber-go/zap/pull/602
+[#572]: https://github.com/uber-go/zap/pull/572
+[#606]: https://github.com/uber-go/zap/pull/606
+[#614]: https://github.com/uber-go/zap/pull/614
+[#657]: https://github.com/uber-go/zap/pull/657
+[#706]: https://github.com/uber-go/zap/pull/706
+[#610]: https://github.com/uber-go/zap/pull/610
+[#675]: https://github.com/uber-go/zap/pull/675
+[#704]: https://github.com/uber-go/zap/pull/704
+[#725]: https://github.com/uber-go/zap/pull/725
+[#736]: https://github.com/uber-go/zap/pull/736
+[#751]: https://github.com/uber-go/zap/pull/751
+[#758]: https://github.com/uber-go/zap/pull/758
+[#771]: https://github.com/uber-go/zap/pull/771
+[#773]: https://github.com/uber-go/zap/pull/773
+[#775]: https://github.com/uber-go/zap/pull/775
+[#786]: https://github.com/uber-go/zap/pull/786
+[#791]: https://github.com/uber-go/zap/pull/791
+[#795]: https://github.com/uber-go/zap/pull/795
+[#799]: https://github.com/uber-go/zap/pull/799
+[#804]: https://github.com/uber-go/zap/pull/804
+[#812]: https://github.com/uber-go/zap/pull/812
+[#806]: https://github.com/uber-go/zap/pull/806
+[#813]: https://github.com/uber-go/zap/pull/813
+[#629]: https://github.com/uber-go/zap/pull/629
+[#697]: https://github.com/uber-go/zap/pull/697
+[#828]: https://github.com/uber-go/zap/pull/828
+[#835]: https://github.com/uber-go/zap/pull/835
+[#843]: https://github.com/uber-go/zap/pull/843
+[#844]: https://github.com/uber-go/zap/pull/844
+[#852]: https://github.com/uber-go/zap/pull/852
+[#854]: https://github.com/uber-go/zap/pull/854
+[#861]: https://github.com/uber-go/zap/pull/861
+[#862]: https://github.com/uber-go/zap/pull/862
+[#865]: https://github.com/uber-go/zap/pull/865
+[#867]: https://github.com/uber-go/zap/pull/867
+[#881]: https://github.com/uber-go/zap/pull/881
+[#903]: https://github.com/uber-go/zap/pull/903
+[#912]: https://github.com/uber-go/zap/pull/912
+[#913]: https://github.com/uber-go/zap/pull/913
+[#928]: https://github.com/uber-go/zap/pull/928
+[#931]: https://github.com/uber-go/zap/pull/931
+[#936]: https://github.com/uber-go/zap/pull/936

vendor/go.uber.org/zap/CODE_OF_CONDUCT.md

@@ -0,0 +1,75 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age,
+body size, disability, ethnicity, gender identity and expression, level of
+experience, nationality, personal appearance, race, religion, or sexual
+identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an
+appointed representative at an online or offline event. Representation of a
+project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at oss-conduct@uber.com. The project
+team will review and investigate all complaints, and will respond in a way
+that it deems appropriate to the circumstances. The project team is obligated
+to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 1.4, available at
+[http://contributor-covenant.org/version/1/4][version].
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

vendor/go.uber.org/zap/CONTRIBUTING.md

@@ -0,0 +1,75 @@
+# Contributing
+
+We'd love your help making zap the very best structured logging library in Go!
+
+If you'd like to add new exported APIs, please [open an issue][open-issue]
+describing your proposal — discussing API changes ahead of time makes
+pull request review much smoother. In your issue, pull request, and any other
+communications, please remember to treat your fellow contributors with
+respect! We take our [code of conduct](CODE_OF_CONDUCT.md) seriously.
+
+Note that you'll need to sign [Uber's Contributor License Agreement][cla]
+before we can accept any of your contributions. If necessary, a bot will remind
+you to accept the CLA when you open your pull request.
+
+## Setup
+
+[Fork][fork], then clone the repository:
+
+```
+mkdir -p $GOPATH/src/go.uber.org
+cd $GOPATH/src/go.uber.org
+git clone git@github.com:your_github_username/zap.git
+cd zap
+git remote add upstream https://github.com/uber-go/zap.git
+git fetch upstream
+```
+
+Make sure that the tests and the linters pass:
+
+```
+make test
+make lint
+```
+
+If you're not using the minor version of Go specified in the Makefile's
+`LINTABLE_MINOR_VERSIONS` variable, `make lint` doesn't do anything. This is
+fine, but it means that you'll only discover lint failures after you open your
+pull request.
+
+## Making Changes
+
+Start by creating a new branch for your changes:
+
+```
+cd $GOPATH/src/go.uber.org/zap
+git checkout master
+git fetch upstream
+git rebase upstream/master
+git checkout -b cool_new_feature
+```
+
+Make your changes, then ensure that `make lint` and `make test` still pass. If
+you're satisfied with your changes, push them to your fork.
+
+```
+git push origin cool_new_feature
+```
+
+Then use the GitHub UI to open a pull request.
+
+At this point, you're waiting on us to review your changes. We *try* to respond
+to issues and pull requests within a few business days, and we may suggest some
+improvements or alternatives. Once your changes are approved, one of the
+project maintainers will merge them.
+
+We're much more likely to approve your changes if you:
+
+* Add tests for new functionality.
+* Write a [good commit message][commit-message].
+* Maintain backward compatibility.
+
+[fork]: https://github.com/uber-go/zap/fork
+[open-issue]: https://github.com/uber-go/zap/issues/new
+[cla]: https://cla-assistant.io/uber-go/zap
+[commit-message]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html

vendor/go.uber.org/zap/FAQ.md

@@ -0,0 +1,164 @@
+# Frequently Asked Questions
+
+## Design
+
+### Why spend so much effort on logger performance?
+
+Of course, most applications won't notice the impact of a slow logger: they
+already take tens or hundreds of milliseconds for each operation, so an extra
+millisecond doesn't matter.
+
+On the other hand, why *not* make structured logging fast? The `SugaredLogger`
+isn't any harder to use than other logging packages, and the `Logger` makes
+structured logging possible in performance-sensitive contexts. Across a fleet
+of Go microservices, making each application even slightly more efficient adds
+up quickly.
+
+### Why aren't `Logger` and `SugaredLogger` interfaces?
+
+Unlike the familiar `io.Writer` and `http.Handler`, `Logger` and
+`SugaredLogger` interfaces would include *many* methods. As [Rob Pike points
+out][go-proverbs], "The bigger the interface, the weaker the abstraction."
+Interfaces are also rigid — *any* change requires releasing a new major
+version, since it breaks all third-party implementations.
+
+Making the `Logger` and `SugaredLogger` concrete types doesn't sacrifice much
+abstraction, and it lets us add methods without introducing breaking changes.
+Your applications should define and depend upon an interface that includes
+just the methods you use.
+
+### Why are some of my logs missing?
+
+Logs are dropped intentionally by zap when sampling is enabled. The production
+configuration (as returned by `NewProductionConfig()` enables sampling which will
+cause repeated logs within a second to be sampled. See more details on why sampling
+is enabled in [Why sample application logs](https://github.com/uber-go/zap/blob/master/FAQ.md#why-sample-application-logs).
+
+### Why sample application logs?
+
+Applications often experience runs of errors, either because of a bug or
+because of a misbehaving user. Logging errors is usually a good idea, but it
+can easily make this bad situation worse: not only is your application coping
+with a flood of errors, it's also spending extra CPU cycles and I/O logging
+those errors. Since writes are typically serialized, logging limits throughput
+when you need it most.
+
+Sampling fixes this problem by dropping repetitive log entries. Under normal
+conditions, your application writes out every entry. When similar entries are
+logged hundreds or thousands of times each second, though, zap begins dropping
+duplicates to preserve throughput.
+
+### Why do the structured logging APIs take a message in addition to fields?
+
+Subjectively, we find it helpful to accompany structured context with a brief
+description. This isn't critical during development, but it makes debugging
+and operating unfamiliar systems much easier.
+
+More concretely, zap's sampling algorithm uses the message to identify
+duplicate entries. In our experience, this is a practical middle ground
+between random sampling (which often drops the exact entry that you need while
+debugging) and hashing the complete entry (which is prohibitively expensive).
+
+### Why include package-global loggers?
+
+Since so many other logging packages include a global logger, many
+applications aren't designed to accept loggers as explicit parameters.
+Changing function signatures is often a breaking change, so zap includes
+global loggers to simplify migration.
+
+Avoid them where possible.
+
+### Why include dedicated Panic and Fatal log levels?
+
+In general, application code should handle errors gracefully instead of using
+`panic` or `os.Exit`. However, every rule has exceptions, and it's common to
+crash when an error is truly unrecoverable. To avoid losing any information
+— especially the reason for the crash — the logger must flush any
+buffered entries before the process exits.
+
+Zap makes this easy by offering `Panic` and `Fatal` logging methods that
+automatically flush before exiting. Of course, this doesn't guarantee that
+logs will never be lost, but it eliminates a common error.
+
+See the discussion in uber-go/zap#207 for more details.
+
+### What's `DPanic`?
+
+`DPanic` stands for "panic in development." In development, it logs at
+`PanicLevel`; otherwise, it logs at `ErrorLevel`. `DPanic` makes it easier to
+catch errors that are theoretically possible, but shouldn't actually happen,
+*without* crashing in production.
+
+If you've ever written code like this, you need `DPanic`:
+
+```go
+if err != nil {
+  panic(fmt.Sprintf("shouldn't ever get here: %v", err))
+}
+```
+
+## Installation
+
+### What does the error `expects import "go.uber.org/zap"` mean?
+
+Either zap was installed incorrectly or you're referencing the wrong package
+name in your code.
+
+Zap's source code happens to be hosted on GitHub, but the [import
+path][import-path] is `go.uber.org/zap`. This gives us, the project
+maintainers, the freedom to move the source code if necessary. However, it
+means that you need to take a little care when installing and using the
+package.
+
+If you follow two simple rules, everything should work: install zap with `go
+get -u go.uber.org/zap`, and always import it in your code with `import
+"go.uber.org/zap"`. Your code shouldn't contain *any* references to
+`github.com/uber-go/zap`.
+
+## Usage
+
+### Does zap support log rotation?
+
+Zap doesn't natively support rotating log files, since we prefer to leave this
+to an external program like `logrotate`.
+
+However, it's easy to integrate a log rotation package like
+[`gopkg.in/natefinch/lumberjack.v2`][lumberjack] as a `zapcore.WriteSyncer`.
+
+```go
+// lumberjack.Logger is already safe for concurrent use, so we don't need to
+// lock it.
+w := zapcore.AddSync(&lumberjack.Logger{
+  Filename:   "/var/log/myapp/foo.log",
+  MaxSize:    500, // megabytes
+  MaxBackups: 3,
+  MaxAge:     28, // days
+})
+core := zapcore.NewCore(
+  zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig()),
+  w,
+  zap.InfoLevel,
+)
+logger := zap.New(core)
+```
+
+## Extensions
+
+We'd love to support every logging need within zap itself, but we're only
+familiar with a handful of log ingestion systems, flag-parsing packages, and
+the like. Rather than merging code that we can't effectively debug and
+support, we'd rather grow an ecosystem of zap extensions.
+
+We're aware of the following extensions, but haven't used them ourselves:
+
+| Package | Integration |
+| --- | --- |
+| `github.com/tchap/zapext` | Sentry, syslog |
+| `github.com/fgrosse/zaptest` | Ginkgo |
+| `github.com/blendle/zapdriver` | Stackdriver |
+| `github.com/moul/zapgorm` | Gorm |
+| `github.com/moul/zapfilter` | Advanced filtering rules |
+
+[go-proverbs]: https://go-proverbs.github.io/
+[import-path]: https://golang.org/cmd/go/#hdr-Remote_import_paths
+[lumberjack]: https://godoc.org/gopkg.in/natefinch/lumberjack.v2

vendor/go.uber.org/zap/LICENSE.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2016-2017 Uber Technologies, Inc.
+
+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/go.uber.org/zap/Makefile

@@ -0,0 +1,73 @@
+export GOBIN ?= $(shell pwd)/bin
+
+GOLINT = $(GOBIN)/golint
+STATICCHECK = $(GOBIN)/staticcheck
+BENCH_FLAGS ?= -cpuprofile=cpu.pprof -memprofile=mem.pprof -benchmem
+
+# Directories containing independent Go modules.
+#
+# We track coverage only for the main module.
+MODULE_DIRS = . ./benchmarks ./zapgrpc/internal/test
+
+# Many Go tools take file globs or directories as arguments instead of packages.
+GO_FILES := $(shell \
+	find . '(' -path '*/.*' -o -path './vendor' ')' -prune \
+	-o -name '*.go' -print | cut -b3-)
+
+.PHONY: all
+all: lint test
+
+.PHONY: lint
+lint: $(GOLINT) $(STATICCHECK)
+	@rm -rf lint.log
+	@echo "Checking formatting..."
+	@gofmt -d -s $(GO_FILES) 2>&1 | tee lint.log
+	@echo "Checking vet..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go vet ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking lint..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && $(GOLINT) ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking staticcheck..."
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && $(STATICCHECK) ./... 2>&1) &&) true | tee -a lint.log
+	@echo "Checking for unresolved FIXMEs..."
+	@git grep -i fixme | grep -v -e Makefile | tee -a lint.log
+	@echo "Checking for license headers..."
+	@./checklicense.sh | tee -a lint.log
+	@[ ! -s lint.log ]
+	@echo "Checking 'go mod tidy'..."
+	@make tidy
+	@if ! git diff --quiet; then \
+		echo "'go mod tidy' resulted in changes or working tree is dirty:"; \
+		git --no-pager diff; \
+	fi
+
+$(GOLINT):
+	cd tools && go install golang.org/x/lint/golint
+
+$(STATICCHECK):
+	cd tools && go install honnef.co/go/tools/cmd/staticcheck
+
+.PHONY: test
+test:
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go test -race ./...) &&) true
+
+.PHONY: cover
+cover:
+	go test -race -coverprofile=cover.out -coverpkg=./... ./...
+	go tool cover -html=cover.out -o cover.html
+
+.PHONY: bench
+BENCH ?= .
+bench:
+	@$(foreach dir,$(MODULE_DIRS), ( \
+		cd $(dir) && \
+		go list ./... | xargs -n1 go test -bench=$(BENCH) -run="^$$" $(BENCH_FLAGS) \
+	) &&) true
+
+.PHONY: updatereadme
+updatereadme:
+	rm -f README.md
+	cat .readme.tmpl | go run internal/readme/readme.go > README.md
+
+.PHONY: tidy
+tidy:
+	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go mod tidy) &&) true

vendor/go.uber.org/zap/README.md

@@ -0,0 +1,134 @@
+# :zap: zap [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov]
+
+Blazing fast, structured, leveled logging in Go.
+
+## Installation
+
+`go get -u go.uber.org/zap`
+
+Note that zap only supports the two most recent minor versions of Go.
+
+## Quick Start
+
+In contexts where performance is nice, but not critical, use the
+`SugaredLogger`. It's 4-10x faster than other structured logging
+packages and includes both structured and `printf`-style APIs.
+
+```go
+logger, _ := zap.NewProduction()
+defer logger.Sync() // flushes buffer, if any
+sugar := logger.Sugar()
+sugar.Infow("failed to fetch URL",
+  // Structured context as loosely typed key-value pairs.
+  "url", url,
+  "attempt", 3,
+  "backoff", time.Second,
+)
+sugar.Infof("Failed to fetch URL: %s", url)
+```
+
+When performance and type safety are critical, use the `Logger`. It's even
+faster than the `SugaredLogger` and allocates far less, but it only supports
+structured logging.
+
+```go
+logger, _ := zap.NewProduction()
+defer logger.Sync()
+logger.Info("failed to fetch URL",
+  // Structured context as strongly typed Field values.
+  zap.String("url", url),
+  zap.Int("attempt", 3),
+  zap.Duration("backoff", time.Second),
+)
+```
+
+See the [documentation][doc] and [FAQ](FAQ.md) for more details.
+
+## Performance
+
+For applications that log in the hot path, reflection-based serialization and
+string formatting are prohibitively expensive — they're CPU-intensive
+and make many small allocations. Put differently, using `encoding/json` and
+`fmt.Fprintf` to log tons of `interface{}`s makes your application slow.
+
+Zap takes a different approach. It includes a reflection-free, zero-allocation
+JSON encoder, and the base `Logger` strives to avoid serialization overhead
+and allocations wherever possible. By building the high-level `SugaredLogger`
+on that foundation, zap lets users *choose* when they need to count every
+allocation and when they'd prefer a more familiar, loosely typed API.
+
+As measured by its own [benchmarking suite][], not only is zap more performant
+than comparable structured logging packages — it's also faster than the
+standard library. Like all benchmarks, take these with a grain of salt.<sup
+id="anchor-versions">[1](#footnote-versions)</sup>
+
+Log a message and 10 fields:
+
+| Package | Time | Time % to zap | Objects Allocated |
+| :------ | :--: | :-----------: | :---------------: |
+| :zap: zap | 862 ns/op | +0% | 5 allocs/op
+| :zap: zap (sugared) | 1250 ns/op | +45% | 11 allocs/op
+| zerolog | 4021 ns/op | +366% | 76 allocs/op
+| go-kit | 4542 ns/op | +427% | 105 allocs/op
+| apex/log | 26785 ns/op | +3007% | 115 allocs/op
+| logrus | 29501 ns/op | +3322% | 125 allocs/op
+| log15 | 29906 ns/op | +3369% | 122 allocs/op
+
+Log a message with a logger that already has 10 fields of context:
+
+| Package | Time | Time % to zap | Objects Allocated |
+| :------ | :--: | :-----------: | :---------------: |
+| :zap: zap | 126 ns/op | +0% | 0 allocs/op
+| :zap: zap (sugared) | 187 ns/op | +48% | 2 allocs/op
+| zerolog | 88 ns/op | -30% | 0 allocs/op
+| go-kit | 5087 ns/op | +3937% | 103 allocs/op
+| log15 | 18548 ns/op | +14621% | 73 allocs/op
+| apex/log | 26012 ns/op | +20544% | 104 allocs/op
+| logrus | 27236 ns/op | +21516% | 113 allocs/op
+
+Log a static string, without any context or `printf`-style templating:
+
+| Package | Time | Time % to zap | Objects Allocated |
+| :------ | :--: | :-----------: | :---------------: |
+| :zap: zap | 118 ns/op | +0% | 0 allocs/op
+| :zap: zap (sugared) | 191 ns/op | +62% | 2 allocs/op
+| zerolog | 93 ns/op | -21% | 0 allocs/op
+| go-kit | 280 ns/op | +137% | 11 allocs/op
+| standard library | 499 ns/op | +323% | 2 allocs/op
+| apex/log | 1990 ns/op | +1586% | 10 allocs/op
+| logrus | 3129 ns/op | +2552% | 24 allocs/op
+| log15 | 3887 ns/op | +3194% | 23 allocs/op
+
+## Development Status: Stable
+
+All APIs are finalized, and no breaking changes will be made in the 1.x series
+of releases. Users of semver-aware dependency management systems should pin
+zap to `^1`.
+
+## Contributing
+
+We encourage and support an active, healthy community of contributors &mdash;
+including you! Details are in the [contribution guide](CONTRIBUTING.md) and
+the [code of conduct](CODE_OF_CONDUCT.md). The zap maintainers keep an eye on
+issues and pull requests, but you can also report any negative conduct to
+oss-conduct@uber.com. That email list is a private, safe space; even the zap
+maintainers don't have access, so don't hesitate to hold us to a high
+standard.
+
+<hr>
+
+Released under the [MIT License](LICENSE.txt).
+
+<sup id="footnote-versions">1</sup> In particular, keep in mind that we may be
+benchmarking against slightly older versions of other packages. Versions are
+pinned in the [benchmarks/go.mod][] file. [↩](#anchor-versions)
+
+[doc-img]: https://pkg.go.dev/badge/go.uber.org/zap
+[doc]: https://pkg.go.dev/go.uber.org/zap
+[ci-img]: https://github.com/uber-go/zap/actions/workflows/go.yml/badge.svg
+[ci]: https://github.com/uber-go/zap/actions/workflows/go.yml
+[cov-img]: https://codecov.io/gh/uber-go/zap/branch/master/graph/badge.svg
+[cov]: https://codecov.io/gh/uber-go/zap
+[benchmarking suite]: https://github.com/uber-go/zap/tree/master/benchmarks
+[benchmarks/go.mod]: https://github.com/uber-go/zap/blob/master/benchmarks/go.mod
+