Function GetWatcher

pkg/wconfig/filewatcher.go:37–62

GetWatcher returns the singleton instance of the Watcher

()

// GetWatcher returns the singleton instance of the Watcher
func GetWatcher() *Watcher {
	once.Do(func() {
		watcher, err := fsnotify.NewWatcher()
		if err != nil {
			log.Printf("failed to create file watcher: %v", err)
			return
		}
		configDirAbsPath := wavebase.GetWaveConfigDir()
		log.Printf("create config watcher, configdir=%q", configDirAbsPath)
		instance = &Watcher{watcher: watcher}
		err = instance.watcher.Add(configDirAbsPath)
		const failedStr = "failed to add path %s to watcher: %v"
		if err != nil {
			log.Printf(failedStr, configDirAbsPath, err)
		}

		subdirs := GetConfigSubdirs()
		for _, dir := range subdirs {
			err = instance.watcher.Add(dir)
			if err != nil && !os.IsNotExist(err) {
				log.Printf(failedStr, dir, err)
			}
		}
	})
	return instance
}

func (w *Watcher) Start() {
	w.mutex.Lock()