Initial QSfera import

Server/vendor/go-micro.dev/v4/config/source/file/watcher.go

@@ -0,0 +1,68 @@
+//go:build !linux
+// +build !linux
+
+package file
+
+import (
+	"os"
+
+	"github.com/fsnotify/fsnotify"
+	"go-micro.dev/v4/config/source"
+)
+
+type watcher struct {
+	f *file
+
+	fw *fsnotify.Watcher
+}
+
+func newWatcher(f *file) (source.Watcher, error) {
+	fw, err := fsnotify.NewWatcher()
+	if err != nil {
+		return nil, err
+	}
+
+	fw.Add(f.path)
+
+	return &watcher{
+		f:  f,
+		fw: fw,
+	}, nil
+}
+
+func (w *watcher) Next() (*source.ChangeSet, error) {
+	// try get the event
+	select {
+	case event, ok := <-w.fw.Events:
+		// check if channel was closed (i.e. Watcher.Close() was called).
+		if !ok {
+			return nil, source.ErrWatcherStopped
+		}
+
+		if event.Has(fsnotify.Rename) {
+			// check existence of file, and add watch again
+			_, err := os.Stat(event.Name)
+			if err == nil || os.IsExist(err) {
+				w.fw.Add(event.Name)
+			}
+		}
+
+		c, err := w.f.Read()
+		if err != nil {
+			return nil, err
+		}
+
+		return c, nil
+	case err, ok := <-w.fw.Errors:
+		// check if channel was closed (i.e. Watcher.Close() was called).
+		if !ok {
+			return nil, source.ErrWatcherStopped
+		}
+
+		return nil, err
+	}
+}
+
+func (w *watcher) Stop() error {
+	return w.fw.Close()
+}