67 lines
1.0 KiB
Go
67 lines
1.0 KiB
Go
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package file
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import (
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"errors"
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"os"
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"github.com/fsnotify/fsnotify"
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"github.com/micro/go-micro/config/source"
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)
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type watcher struct {
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f *file
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fw *fsnotify.Watcher
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exit chan bool
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}
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func newWatcher(f *file) (source.Watcher, error) {
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fw, err := fsnotify.NewWatcher()
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if err != nil {
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return nil, err
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}
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fw.Add(f.path)
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return &watcher{
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f: f,
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fw: fw,
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exit: make(chan bool),
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}, nil
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}
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func (w *watcher) Next() (*source.ChangeSet, error) {
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// is it closed?
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select {
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case <-w.exit:
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return nil, errors.New("watcher stopped")
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default:
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}
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// try get the event
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select {
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case event, _ := <-w.fw.Events:
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if event.Op == fsnotify.Rename {
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// check existence of file, and add watch again
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_, err := os.Stat(event.Name)
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if err == nil || os.IsExist(err) {
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w.fw.Add(event.Name)
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}
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}
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c, err := w.f.Read()
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if err != nil {
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return nil, err
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}
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return c, nil
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case err := <-w.fw.Errors:
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return nil, err
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case <-w.exit:
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return nil, errors.New("watcher stopped")
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}
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}
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func (w *watcher) Stop() error {
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return w.fw.Close()
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}
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