package main

import (
	"flag"
	"github.com/fsnotify/fsnotify"
	"log"
)

func main() {
	log.SetFlags(log.LstdFlags | log.Lshortfile)

	var name = flag.String("f", "", "File path")
	flag.Parse()
	if *name == "" {
		log.Fatal("File path is empty.")
	}

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}
	if err = watcher.Add(*name); err != nil {
		log.Fatal(err)
	}
	log.Println("Start fsnotify.")
	for {
		select {
		case ev := <-watcher.Events:
			log.Println(ev.Name, ev.Op.String())
		case er := <-watcher.Errors:
			log.Println(er.Error())
		}
	}
}