extract number of errors and pod directory

pkg/monitor/monitor.go

@@ -7,18 +7,42 @@ import (
 	"regexp"
 )
 
+type Option func(monitor *LogMonitor)
+
+// WithTailFollow Continue looking for new lines (tail -f)
+func WithTailFollow(follow bool) Option {
+	return func(monitor *LogMonitor) {
+		monitor.follow = follow
+	}
+}
+
+// WithReOpen Reopen recreated files (tail -F)
+func WithReOpen(reopen bool) Option {
+	return func(monitor *LogMonitor) {
+		monitor.reopen = reopen
+	}
+}
+
 type Monitor interface {
 	Close() error
 	Watch(filename string, filter *regexp.Regexp, lineChan chan<- string) error
 }
 
-func New() *LogMonitor {
-	return &LogMonitor{
+func New(opts ...Option) *LogMonitor {
+	l := &LogMonitor{
+		follow: true,
+		reopen: true,
 		cancel: make(chan interface{}),
 	}
+	for _, opt := range opts {
+		opt(l)
+	}
+	return l
 }
 
 type LogMonitor struct {
+	follow bool
+	reopen bool
 	cancel chan interface{}
 }
 
@@ -28,7 +52,7 @@ func (l *LogMonitor) Close() error {
 }
 
 func (l *LogMonitor) Watch(filename string, filter *regexp.Regexp, lineChan chan<- string) error {
-	t, err := tail.TailFile(filename, tail.Config{Follow: true, ReOpen: true, Logger: tail.DiscardingLogger})
+	t, err := tail.TailFile(filename, tail.Config{Follow: l.follow, ReOpen: l.reopen, Logger: tail.DiscardingLogger})
 	if err != nil {
 		return fmt.Errorf("unable to begin to tail file '%s': %w", filename, err)
 	}
@@ -36,11 +60,15 @@ func (l *LogMonitor) Watch(filename string, filter *regexp.Regexp, lineChan chan
 	for {
 		select {
 		case line := <-t.Lines:
+			if line == nil {
+				// EOF
+				t.Cleanup()
+				return nil
+			}
 			if line.Err != nil {
 				zap.S().Errorf("tail error: %v", err)
 				continue
 			}
-			zap.S().Infof("new line: '%s'", line.Text)
 			if filter.MatchString(line.Text) {
 				lineChan <- line.Text
 			}
@@ -50,5 +78,4 @@ func (l *LogMonitor) Watch(filename string, filter *regexp.Regexp, lineChan chan
 			return nil
 		}
 	}
-	return nil
 }