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GitHub - chzyer/logex: An golang log lib, supports tracking and level, wrap by standard log lib
An golang log lib, supports tracking and level, wrap by standard log lib - chzyer/logex
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GitHub - chzyer/logex: An golang log lib, supports tracking and level, wrap by standard log lib

GitHub - chzyer/logex: An golang log lib, supports tracking and level, wrap by standard log lib

Logex

Build Status GoDoc

An golang log lib, supports tracing and level, wrap by standard log lib

How To Get

shell

go get github.com/chzyer/logex

source code

import "github.com/chzyer/logex" // package name is logex

func main() {
  logex.Info("Hello!")
}

Level

import "github.com/chzyer/logex"

func main() {
  logex.Println("")
  logex.Debug("debug staff.") // Only show if has an "DEBUG" named env variable(whatever value).
  logex.Info("info")
  logex.Warn("")
  logex.Fatal("") // also trigger exec "os.Exit(1)"
  logex.Error(err) // print error
  logex.Struct(obj) // print objs follow such layout "%T(%+v)"
  logex.Pretty(obj) // print objs as JSON-style, more readable and hide non-publish properties, just JSON
}

Extendability

source code

type MyStruct struct {
  BiteMe bool
}

may change to

type MyStruct struct {
  BiteMe bool
  logex.Logger // just this
}

func main() {
  ms := new(MyStruct)
  ms.Info("woo!")
}

Runtime Tracing

All log will attach theirs stack info. Stack Info will shown by an layout, {packageName}.{FuncName}:{FileName}:{FileLine}

package main

import "github.com/chzyer/logex"

func test() {
	logex.Pretty("hello")
}

func main() {
	test()
}

response

2014/10/10 15:17:14 [main.test:testlog.go:6][PRETTY] "hello"

Error Tracing

You can trace an error if you want.

package main

import (
	"github.com/chzyer/logex"
	"os"
)

func openfile() (*os.File, error) {
	f, err := os.Open("xxx")
	if err != nil {
		err = logex.Trace(err)
	}
	return f, err
}

func test() error {
	f, err := openfile()
	if err != nil {
		return logex.Trace(err)
	}
	f.Close()
	return nil
}

func main() {
	err := test()
	if err != nil {
		logex.Error(err)
		return
	}
	logex.Info("test success")
}

response

2014/10/10 15:22:29 [main.main:testlog.go:28][ERROR] [main.openfile:11;main.test:19] open xxx: no such file or directory

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