Golang从包中导入方法

Question

Now i decided to use leveled logger in my Go programm. At this moment it's logrus. But after some investigation (through pain) found that there are much loggers: glog, log15, logrus and so on. So, now i want try to use logrus and have
possibility to change it on another without fixing all my sources where log is used.

I tried to create my own package logger which only imports logrus:

package logger
import "github.com/Sirupsen/logrus"

func init() {
    logrus.SetFormater(new(logrus.TextFormater))    
}

In all other my sources a want to use i in such way: // main.go

package main
import log "logger"

func main() {
   log.Print(...)
   log.Debug(...)
   and so on
}

But compiler says me that there are no such methods in logger package. Is there a way just import some package A to my own package B and use in my code all methods of A through B?

The reason what i need this is to have a chance quickly change logrus to ahother logger in future which support same methods just replacing several lines of code in my own logger file without replacing import log "github.com/Sirupsen/logrus" on import log "github.com/some_bestlogger" over all sources

Answer 1

You can import your logger package simply for its side effects, and still use the logrus package directly:

package main

import (
    log "github.com/Sirupsen/logrus"
    _ "logger"
)

func main() {
    log.Print()
    log.Debug()
}

If you do want to be able to call those log function directly through your "logger" package, you will need to define the functions and delegate them to the "logrus" package internally.