logrus4logr

Provides adapters for using Logrus hooks and formatters with Logr.

While Logrus hooks and formatters can easily be modified to work directly with Logr, these adapters are provided for convenience.

Hooks

A Logrus hook can be adapted to a Logr target. The example below uses LFSHook. More examples can be found here.

package main
import (
  "github.com/rifflock/lfshook"
  "github.com/sirupsen/logrus"
  "github.com/wiggin77/logr"
  "github.com/wiggin77/logrus4logr"
)

func main() {
  var lgr = &logr.Logr{}

  // create a Local File System Hook (LFSHook)
  pathMap := lfshook.PathMap{
    logrus.InfoLevel:  "./info.log",
    logrus.WarnLevel:  "./warn.log",
    logrus.ErrorLevel: "./error.log",
  }
  lfsHook := lfshook.NewHook(pathMap, &logrus.JSONFormatter{})

  // log severity Info or higher.
  filter := &logr.StdFilter{Lvl: logr.Info}

  // create adapter wrapping lfshook.
  target := logrus4logr.NewAdapterTarget(filter, nil, lfsHook, 1000)
  lgr.AddTarget(target)

  // log stuff!
  logger := lgr.NewLogger().WithField("status", "woot!")

  logger.Info("I'm hooked on Logr")
  logger.WithField("code", 501).Error("Request failed")

  lgr.Shutdown()
}

Formatters

A Logrus formatter can be used by Logr via an adapter. The example below uses Logrus' built-in TextFormatter. More examples can be found here.

package main
import (
  "github.com/sirupsen/logrus"
  "github.com/wiggin77/logr"
  "github.com/wiggin77/logrus4logr"
)

func main() {
  var lgr = &logr.Logr{}

  // create a Logrus TextFormatter with whatever settings you prefer.
  logrusFormatter := &logrus.TextFormatter{
    // settings...
  }

  // log severity Info or higher.
  filter := &logr.StdFilter{Lvl: logr.Info}

  // wrap TextFormatter in Logr adapter.
  formatter := &logrus4logr.FAdapter{Fmtr: logrusFormatter}

  // create writer target to stdout using adapter.
  var t logr.Target
  t = target.NewWriterTarget(filter, formatter, os.Stdout, 1000)
  lgr.AddTarget(t)

  // log stuff!
  logger := lgr.NewLogger().WithField("status", "woot!")

  logger.Info("I'm hooked on Logr")
  logger.WithField("code", 501).Error("Request failed")

  lgr.Shutdown()
}