Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

logger/text_logger.go

@@ -0,0 +1,68 @@
+package logger
+
+import (
+	"errors"
+	"io"
+	"log"
+	"os"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal/rotate"
+)
+
+// Keep those constants for backward compatibility even though they are not
+// used anywhere. See https://github.com/influxdata/telegraf/pull/15514 for
+// more details.
+//
+// Deprecated: Those constants are unused and deprecated. The removal is
+// scheduled for v1.45.0, if you use them please adapt your code!
+const (
+	LogTargetFile   = "file"
+	LogTargetStderr = "stderr"
+)
+
+type textLogger struct {
+	logger *log.Logger
+}
+
+func (l *textLogger) Close() error {
+	writer := l.logger.Writer()
+
+	// Close the writer if possible and avoid closing stderr
+	if writer == os.Stderr {
+		return nil
+	}
+	if closer, ok := writer.(io.Closer); ok {
+		return closer.Close()
+	}
+
+	return errors.New("the underlying writer cannot be closed")
+}
+
+func (l *textLogger) Print(level telegraf.LogLevel, ts time.Time, prefix string, _ map[string]interface{}, args ...interface{}) {
+	msg := append([]interface{}{ts.Format(time.RFC3339), " ", level.Indicator(), " ", prefix}, args...)
+	l.logger.Print(msg...)
+}
+
+func createTextLogger(cfg *Config) (sink, error) {
+	var writer io.Writer = os.Stderr
+	if cfg.Logfile != "" {
+		w, err := rotate.NewFileWriter(
+			cfg.Logfile,
+			cfg.RotationInterval,
+			cfg.RotationMaxSize,
+			cfg.RotationMaxArchives,
+		)
+		if err != nil {
+			return nil, err
+		}
+		writer = w
+	}
+
+	return &textLogger{logger: log.New(writer, "", 0)}, nil
+}
+
+func init() {
+	add("text", createTextLogger)
+}