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File system notifications for Go

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Cross platform, works on:

  • Windows
  • Linux
  • BSD
  • OSX

Example:

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

    // Process events
    go func() {
        for {
            select {
            case ev := <-watcher.Event:
                log.Println("event:", ev)
            case err := <-watcher.Error:
                log.Println("error:", err)
            }
        }
    }()

    err = watcher.Watch("/tmp")
    if err != nil {
        log.Fatal(err)
    }

    /* ... do stuff ... */
    watcher.Close()

For each event:

  • Name
  • IsCreate()
  • IsDelete()
  • IsModify()
  • IsRename()

Notes:

  • When a file is renamed to another directory is it still being watched?
    • No (it shouldn't be, unless you are watching where it was moved to).
  • When I watch a directory, are all subdirectories watched as well?
    • No, you must add watches for any directory you want to watch.
  • Do I have to watch the Error and Event channels in a separate goroutine?
    • As of now, yes. Looking into making this single-thread friendly.

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File system notification for Go

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