Watch for created directories.

watchalldirs.go

package main

import (
	"log"
	"os"
	"path/filepath"

	"github.com/howeyc/fsnotify"
)

func watchAllDirs(watcher *fsnotify.Watcher, root string) (err error) {
	walkFn := func(path string, info os.FileInfo, err error) error {
		if info.IsDir() {
			watcher.Watch(path)
			log.Println("Added Watch: ", path)
		}
		return nil
	}

	return filepath.Walk(root, walkFn)
}

func main() {
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}

	done := make(chan bool)

	go func() {
		for {
			select {
			case ev := <-watcher.Event:
				log.Println("event:", ev)
				if ev.IsCreate() {
					if finfo, err := os.Stat(ev.Name); err == nil && finfo.IsDir() {
						watcher.Watch(ev.Name)
						log.Println("Added Watch: ", ev.Name)
					}
				}
			case err := <-watcher.Error:
				log.Println("error:", err)
			}
		}
		done <- true
	}()

	err = watchAllDirs(watcher, "test")
	if err != nil {
		log.Fatal(err)
	}

	<-done

	watcher.Close()
}