adept/config/log.go

package config

import (
	"io"
	"log"
	"os"

	"github.com/spf13/viper"

	"git.metaunix.net/BitGoblin/adept/util"
)

func InitLogging() *os.File {
	var fileHandle *os.File = nil

	if viper.GetBool("log_to_file") {
		// open a file
		var err error
		fileHandle, err = os.OpenFile(util.ResolveTilde(viper.GetString("log_file")), os.O_APPEND | os.O_CREATE | os.O_RDWR, 0644)
		if err != nil {
		  log.Fatalf("Error opening log file: %v", err)
		  os.Exit(1)
		}
	}

	// create a MultiWriter instance so we can write to both console AND file
	mw := io.MultiWriter(os.Stdout, fileHandle)
	// set our multiwriter object as the output for logging
	log.SetOutput(mw)

	return fileHandle
}