quick go logger writing to file

gistfile1.txt

in program:

func init() {
	if lf := os.Getenv("LOGFILE"); lf != "" {
		log.SetOutput(func() io.Writer { f, _ := os.Create(lf); return f }())
	}
}

or

func init() {
	log.SetOutput(func() io.Writer { f, _ := os.Create("/tmp/log"); return f }())
}

or

log := log.New(func() io.Writer { f, _ := os.Create("/tmp/log"); return f }(), "", 0)

log.Printf("vs: %#+v\n", vs)

in other terminal:
tail -f /var/log