fix: revert code

Author: Rick Yu

air_example.toml

@@ -65,3 +65,7 @@ runner = "green"
 [misc]
 # Delete tmp directory on exit
 clean_on_exit = true
+
+[screen]
+clear_on_rebuild = true
+keep_scroll = true

runner/engine.go

@@ -239,6 +239,9 @@ func (e *Engine) watchPath(path string) error {
 				return
 			case ev := <-e.watcher.Events():
 				e.mainDebug("event: %+v", ev)
+				if !validEvent(ev) {
+					break
+				}
 				if isDir(ev.Name) {
 					e.watchNewDir(ev.Name, removeEvent(ev))
 					break

runner/util.go

@@ -215,6 +215,12 @@ func isDir(path string) bool {
 	return i.IsDir()
 }
 
+func validEvent(ev fsnotify.Event) bool {
+	return ev.Op&fsnotify.Create == fsnotify.Create ||
+		ev.Op&fsnotify.Write == fsnotify.Write ||
+		ev.Op&fsnotify.Remove == fsnotify.Remove
+}
+
 func removeEvent(ev fsnotify.Event) bool {
 	return ev.Op&fsnotify.Remove == fsnotify.Remove
 }