enhance(cache): handle symlinks in file event handler

Author: 0xJacky

internal/cache/index.go

@@ -216,12 +216,28 @@ func (s *Scanner) handleFileEvent(event fsnotify.Event) {
 		return
 	}
 
-	fi, err := os.Stat(event.Name)
+	// Use Lstat to get symlink info without following it
+	fi, err := os.Lstat(event.Name)
 	if err != nil {
 		return
 	}
 
-	if fi.IsDir() {
+	// If it's a symlink, we need to check what it points to
+	var targetIsDir bool
+	if fi.Mode()&os.ModeSymlink != 0 {
+		// For symlinks, check the target
+		targetFi, err := os.Stat(event.Name)
+		if err != nil {
+			logger.Debug("Symlink target not accessible:", event.Name, err)
+			return
+		}
+		targetIsDir = targetFi.IsDir()
+		logger.Debug("Symlink changed:", event.Name, "-> target is dir:", targetIsDir)
+	} else {
+		targetIsDir = fi.IsDir()
+	}
+
+	if targetIsDir {
 		logger.Debug("Directory changed:", event.Name)
 	} else {
 		logger.Debug("File changed:", event.Name)