go-easylog

What's this ?

This library is easy logger.
It has these functions.

• 5 levels of output level for log
  • FATAL
  • ERROR
  • WARN <- Default
  • INFO
  • TRACE
• Output file
• File rotation

Install

go get github.com/go-easylog/el

Exsample

• main.go

   package main
  
   import "github.com/go-easylog/el"
  
   func main() {
  
   	// Default output level is "WARN"
   	el.Warn("Output warning")
   	el.Trace("This comment is don't output to log")
  
   	// Set level for log
   	el.SetLogLevel(el.TRACE)
  
   	el.Info("This will be outputed")
  
   	if err := el.SetRotateLog("./%Y/%M/%D.log"); err != nil {
   		panic(err)
   	}
   	// %Y <- year  (YYYY)
   	// %M <- month (MM)
   	// %D <- day   (DD)
   	//
   	// "./prefix-%Y-%M.log"  <---  It is possible to specify like this
   	//                             This pattern in one month's rotation
  
  
   	el.Trace("this comment outputing to file")
  
   	
   	// no rotate pattern
   	if err := el.SetRotateLog("./no-rotate.log"); err != nil {
   		panic(err)
   	}
  
   	el.Error("this file is no rotate")
   	el.Fatal("error exit") // <- Forced kill here
  
   	el.Trace("this text is no outputed") // <- This is not output
   }

• terminal

   $ go run main.go
   2017-02-04 04:08:03 [WARN] Output warning
   2017-02-04 04:08:03 [INFO] This will be outputed
   2017-02-04 04:08:03 [FATAL] error exit
   exit status 255
  

• 2017/02/04.log

   2017-02-04 04:08:03 [TRACE] this comment outputing to file
  

• rotator_test.go

   2017-02-04 04:08:03 [ERROR] this file is no rotate
  

Additionally

This package supprts github.com/pkg/errors

• main.go

   package main
  
   import (
   	"fmt"
  
   	"github.com/go-easylog/el"
   	"github.com/pkg/errors"
   )
  
   func ErrorFunc() error {
   	return fmt.Errorf("base error")
   }
  
   func main() {
  
   	// set debug mode
   	el.SetDebug()
   	if err := ErrorFunc(); err != nil {
   		el.Error(errors.Wrap(err, "Error by ErrorFunc() <-- (1)"))
   	}
  
   	// if when release mode
   	// not outputs the error details 
   	el.SetRelease()
   	if err := ErrorFunc(); err != nil {
   		el.Error(errors.Wrap(err, "Error by ErrorFunc() <-- (2)"))
   	}
   }

• terminal

   $ go run main.go
   2017-02-04 04:34:49 [ERROR] base error
   Error by ErrorFunc() <-- (1)
   main.main
   		/Users/.../exsample_el/main.go:18
   runtime.main
   		/usr/local/Cellar/go/1.7.4_2/libexec/src/runtime/proc.go:183
   runtime.goexit
   		/usr/local/Cellar/go/1.7.4_2/libexec/src/runtime/asm_amd64.s:2086
   2017-02-04 04:34:49 [ERROR] Error by ErrorFunc() <-- (2): base error