Move logrus wrapper to ocis-pkg

To make it more widely usable

idp/pkg/logging/logrus_wrapper.go

@@ -1,74 +0,0 @@
-package logging
-
-import (
-	"io/ioutil"
-
-	"github.com/rs/zerolog"
-	"github.com/sirupsen/logrus"
-)
-
-type levelMap map[logrus.Level]zerolog.Level
-
-var levelMapping = levelMap{
-	logrus.PanicLevel: zerolog.PanicLevel,
-	logrus.ErrorLevel: zerolog.ErrorLevel,
-	logrus.TraceLevel: zerolog.TraceLevel,
-	logrus.DebugLevel: zerolog.DebugLevel,
-	logrus.WarnLevel:  zerolog.WarnLevel,
-	logrus.InfoLevel:  zerolog.InfoLevel,
-}
-
-// LogrusWrapper around zerolog. Required because idp uses logrus internally.
-type LogrusWrapper struct {
-	zeroLog  *zerolog.Logger
-	levelMap levelMap
-}
-
-// Wrap return a logrus logger which internally logs to /dev/null. Messages are passed to the
-// underlying zerolog via hooks.
-func Wrap(zr zerolog.Logger) *logrus.Logger {
-	lr := logrus.New()
-	lr.SetOutput(ioutil.Discard)
-	lr.SetLevel(logrusLevel(zr.GetLevel()))
-	lr.AddHook(&LogrusWrapper{
-		zeroLog:  &zr,
-		levelMap: levelMapping,
-	})
-
-	return lr
-}
-
-// Levels on which logrus hooks should be triggered
-func (h *LogrusWrapper) Levels() []logrus.Level {
-	return logrus.AllLevels
-}
-
-// Fire called by logrus on new message
-func (h *LogrusWrapper) Fire(entry *logrus.Entry) error {
-	h.zeroLog.WithLevel(h.levelMap[entry.Level]).
-		Fields(zeroLogFields(entry.Data)).
-		Msg(entry.Message)
-
-	return nil
-}
-
-//Convert logrus fields to zerolog
-func zeroLogFields(fields logrus.Fields) map[string]interface{} {
-	fm := make(map[string]interface{})
-	for k, v := range fields {
-		fm[k] = v
-	}
-
-	return fm
-}
-
-// Convert logrus level to zerolog
-func logrusLevel(level zerolog.Level) logrus.Level {
-	for lrLvl, zrLvl := range levelMapping {
-		if zrLvl == level {
-			return lrLvl
-		}
-	}
-
-	panic("Unexpected loglevel")
-}