Decimate go-logging & replace with logrus backend

License: MIT
Signed-off-by: rht <rhtbot@gmail.com>

util/log.go

@@ -3,23 +3,21 @@ package util
 import (
 	"os"
 
-	logging "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/whyrusleeping/go-logging"
+	"github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/Sirupsen/logrus"
 )
 
 func init() {
 	SetupLogging()
 }
 
-var log = Logger("util")
-
-var ansiGray = "\033[0;37m"
-var ansiBlue = "\033[0;34m"
+var log = logrus.New()
 
 // LogFormats is a map of formats used for our logger, keyed by name.
-var LogFormats = map[string]string{
-	"nocolor": "%{time:2006-01-02 15:04:05.000000} %{level} %{module} %{shortfile}: %{message}",
-	"color": ansiGray + "%{time:15:04:05.000} %{color}%{level:5.5s} " + ansiBlue +
-		"%{module:10.10s}: %{color:reset}%{message} " + ansiGray + "%{shortfile}%{color:reset}",
+// TODO: write custom TextFormatter (don't print module=name explicitly) and
+// fork logrus to add shortfile
+var LogFormats = map[string]*logrus.TextFormatter{
+	"nocolor": &logrus.TextFormatter{DisableColors: true, FullTimestamp: true, TimestampFormat: "2006-01-02 15:04:05.000000", DisableSorting: true},
+	"color":   &logrus.TextFormatter{DisableColors: false, FullTimestamp: true, TimestampFormat: "15:04:05:000", DisableSorting: true},
 }
 var defaultLogFormat = "color"
 
@@ -30,65 +28,66 @@ const (
 )
 
 // loggers is the set of loggers in the system
-var loggers = map[string]*logging.Logger{}
+var loggers = map[string]*logrus.Entry{}
 
 // SetupLogging will initialize the logger backend and set the flags.
 func SetupLogging() {
 
-	fmt := LogFormats[os.Getenv(envLoggingFmt)]
-	if fmt == "" {
-		fmt = LogFormats[defaultLogFormat]
+	format, ok := LogFormats[os.Getenv(envLoggingFmt)]
+	if !ok {
+		format = LogFormats[defaultLogFormat]
 	}
 
-	backend := logging.NewLogBackend(os.Stderr, "", 0)
-	logging.SetBackend(backend)
-	logging.SetFormatter(logging.MustStringFormatter(fmt))
+	log.Out = os.Stderr
+	log.Formatter = format
 
-	lvl := logging.ERROR
+	lvl := logrus.ErrorLevel
 
 	if logenv := os.Getenv(envLogging); logenv != "" {
 		var err error
-		lvl, err = logging.LogLevel(logenv)
+		lvl, err = logrus.ParseLevel(logenv)
 		if err != nil {
-			log.Debugf("logging.LogLevel() Error: %q", err)
-			lvl = logging.ERROR // reset to ERROR, could be undefined now(?)
+			log.Debugf("logrus.ParseLevel() Error: %q", err)
+			lvl = logrus.ErrorLevel // reset to ERROR, could be undefined now(?)
 		}
 	}
 
-	Debug = GetenvBool("IPFS_DEBUG")
-	if Debug {
-		lvl = logging.DEBUG
+	if Debug := GetenvBool("IPFS_DEBUG"); Debug {
+		lvl = logrus.DebugLevel
 	}
 
 	SetAllLoggers(lvl)
-
 }
 
-// SetDebugLogging calls SetAllLoggers with logging.DEBUG
+// SetDebugLogging calls SetAllLoggers with logrus.DebugLevel
 func SetDebugLogging() {
-	SetAllLoggers(logging.DEBUG)
+	SetAllLoggers(logrus.DebugLevel)
 }
 
-// SetAllLoggers changes the logging.Level of all loggers to lvl
-func SetAllLoggers(lvl logging.Level) {
-	logging.SetLevel(lvl, "")
-	for n := range loggers {
-		logging.SetLevel(lvl, n)
+// SetAllLoggers changes the logrus.Level of all loggers to lvl
+func SetAllLoggers(lvl logrus.Level) {
+	log.Level = lvl
+	for _, logger := range loggers {
+		logger.Level = lvl
 	}
 }
 
 // Logger retrieves a particular logger
-func Logger(name string) *logging.Logger {
-	log := logging.MustGetLogger(name)
-	log.ExtraCalldepth = 1
-	loggers[name] = log
-	return log
+func Logger(name string) *logrus.Entry {
+	if len(name) == 0 {
+		log.Warnf("Missing name parameter")
+		name = "undefined"
+	}
+	if _, ok := loggers[name]; !ok {
+		loggers[name] = log.WithField("module", name)
+	}
+	return loggers[name]
 }
 
 // SetLogLevel changes the log level of a specific subsystem
 // name=="*" changes all subsystems
 func SetLogLevel(name, level string) error {
-	lvl, err := logging.LogLevel(level)
+	lvl, err := logrus.ParseLevel(level)
 	if err != nil {
 		return err
 	}
@@ -100,13 +99,11 @@ func SetLogLevel(name, level string) error {
 	}
 
 	// Check if we have a logger by that name
-	// logging.SetLevel() can't tell us...
-	_, ok := loggers[name]
-	if !ok {
+	if _, ok := loggers[name]; !ok {
 		return ErrNoSuchLogger
 	}
 
-	logging.SetLevel(lvl, name)
+	loggers[name].Level = lvl
 
 	return nil
 }