fix: apply suggestion

Signed-off-by: hlts2 <[email protected]>

internal/file/watch/watch.go

@@ -71,7 +71,10 @@ func (w *watch) init() (*watch, error) {
 		return nil, err
 	}
 	w.mu.RLock()
-	dirs := w.dirs
+	dirs := make(map[string]struct{}, len(w.dirs))
+	for name, val := range w.dirs {
+		dirs[name] = val
+	}
 	w.mu.RUnlock()
 	for dir := range dirs {
 		log.Debug("Adding watcher target: ", dir)

internal/file/watch/watch_test.go

@@ -189,6 +189,36 @@ func Test_watch_init(t *testing.T) {
 			},
 		},
 
+		{
+			name: "returns nil when watcher already created and initialize success",
+			fields: fields{
+				dirs: map[string]struct{}{
+					"../watch":      struct{}{},
+					"watch.go":      struct{}{},
+					"watch_test.go": struct{}{},
+				},
+				w: func() *fsnotify.Watcher {
+					w, _ := fsnotify.NewWatcher()
+					return w
+				}(),
+			},
+			checkFunc: func(w want, got *watch, err error) error {
+				if !errors.Is(err, w.err) {
+					return errors.Errorf("got error = %v, want %v", err, w.err)
+				}
+				if got == nil {
+					return errors.New("got is nil")
+				}
+				if got.w == nil {
+					return errors.New("got w is nil")
+				}
+				return nil
+			},
+			want: want{
+				err: nil,
+			},
+		},
+
 		{
 			name: "returns nil when initialize success",
 			fields: fields{