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log's Introduction

log

Go Report GolangCI License Build Status Coverage Status

Yet another Go Logger

log is simple extended version of standard 'log' package based on logLevel most of the concepts inspired from glog and tracelog these packages are huge and complex.

Hence we writing our own log package with as simple as possible and extensible to third party logging systems such as Papertrail, Loggly, LogDNA.

package main

import (
	"flag"
	"io"
	"time"

	syslog "log"

	"github.com/manigandand/log"
)

var (
	logLevel = flag.String("log", "INFO",
		"log-level for the app valid choice INFO, WARNING, ERROR, FATAL, PANIC")
	papertrailAddr = flag.String("papertrail", "",
		"with valid papertrail address starts logging on papertrail.")
)

func main() {
	flag.Parse()

	// init log
	var multiWriter io.Writer
	if *papertrailAddr != "" {
		multiWriter = &log.Papertrail{Address: *papertrailAddr}
	}
	l, ok := log.Levels[*logLevel]
	if !ok {
		syslog.Fatal("log: invalid log-level")
	}
	log.Init(l, multiWriter)

	// ex
	log.Info("log info level example")
	log.Infof("%s---%d", "time", time.Now().Unix())
	log.Infoln("log info level example")

	log.Warning("log info level example")
	log.Warningf("%s---%d", "time", time.Now().Unix())
	log.Warningln("log info level example")

	log.Error("log info level example")
	log.Errorf("%s---%d", "time", time.Now().Unix())
	log.Errorln("log info level example")

	log.Fatal("log info level example")
	log.Fatalf("%s---%d", "time", time.Now().Unix())
	log.Fatalln("log info level example")

	log.Panic("log info level example")
	log.Panicf("%s---%d", "time", time.Now().Unix())
	log.Panicln("log info level example")
}
INFO: 2019/10/07 18:37:20 main.go:35: log info level example
INFO: 2019/10/07 18:37:20 main.go:36: time---1570453640
INFO: 2019/10/07 18:37:20 main.go:37: log info level example
WARNING: 2019/10/07 18:37:20 main.go:39: log info level example
WARNING: 2019/10/07 18:37:20 main.go:40: time---1570453640
WARNING: 2019/10/07 18:37:20 main.go:41: log info level example
ERROR: 2019/10/07 18:37:20 main.go:43: log info level example
ERROR: 2019/10/07 18:37:20 main.go:44: time---1570453640
ERROR: 2019/10/07 18:37:20 main.go:45: log info level example
FATAL: 2019/10/07 18:37:20 main.go:47: log info level example
exit status 1
PANIC: 2019/10/07 18:37:20 main.go:47: log info level example
exit status 1

TODO:

  • Context based logging.
  • github.com/sirupsen/logrus
  • github.com/uber-go/zap

Licence

MIT

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