How to implement correctly on GO the functionality of tracking changes in a file?

Question

go

The idea is to read the file after changes, transfer these changes to another function

func MusicFile()   {
  watcher, err := fsnotify.NewWatcher()
  if err != nil {
    log.Fatal(err)
  }
  defer watcher.Close()
  done := make(chan bool)
  go func() {
    fmt.Println("start")
    for {
      select {
      case event := <-watcher.Events:
        if event.Op&fsnotify.Write == fsnotify.Write {
          Parser.ParseMusicFile() -- Вызываю функцию парсинга если в канал записались данные о том что файл перезаписан 


      }
      case err := <-watcher.Errors:
        fmt.Println("error:", err)
      }
  }
  }()
  err = watcher.Add(Parser.ParsConfig().Directory)
  if err != nil {
    log.Fatal(err)
  }
  <-done

  }

I have a file parser

func ParseMusicFile() *MusicFile {
  reSong := regexp.MustCompile(`(?m)(^[^|]+(?:|))`)
  reArtist := regexp.MustCompile(`(?m)\|(.*)`)
  file, err := os.Open(ParsConfig().Directory)
  if err != nil {
    panic(err)
  }
  defer file.Close()
  MusicFile := &MusicFile{}
  scanner := bufio.NewScanner(file)
  for scanner.Scan() {
    if reSong.MatchString(scanner.Text()) { // Тут записывается результат найдено значение по регулярке или нет
      //*MusicFile.Song := reSong.MatchString(scanner.Text())
      MusicFile.Song = reSong.FindStringSubmatch(scanner.Text())[1]
    }else {
      MusicFile.Song = "null"
    }
    if reArtist.MatchString(scanner.Text()) { //Тут записывается результат найдено значение по регулярке или нет
      MusicFile.Artist = reArtist.FindStringSubmatch(scanner.Text())[1]
    }else {
      MusicFile.Artist = "null"
    }
  }

  return MusicFile
}

Парсер возвращает структуру

type MusicFile struct {
  Artist string
  Song   string
}

What’s the point, when the Watcher process starts, it hangs and reads changes in the file, the changes get there using third-party software, how can I properly organize the constant “backup” of changes using the Watcher function
Put on the right path, I guess changes using the parser as well need to be received through the channel? and to transfer already a pointer on this channel there where it is necessary?