refactor assign file list

import.go

@@ -93,10 +93,21 @@ func (s *Settings[C]) importStreams() {
 func (s *Settings[C]) importFiles() {
 
 	s.fileWatch.Lock()
-	defer s.fileWatch.Unlock()
 
 	// new files may have been added
-	s.fileWatch.watchList = make(map[string]string)
+	tmpWatchList := make(map[string]string)
+
+	defer func() {
+		s.fileWatch.watchList = tmpWatchList
+		s.fileWatch.Unlock()
+	}()
+
+	errorCount := len(s.errors)
+	defer func() {
+		if len(s.errors) > errorCount {
+			s.notifyErrorHooks()
+		}
+	}()
 
 	for _, d := range s.files.directories {
 		fn := path.Join(d, s.files.name+s.files.format.Extension())
@@ -112,7 +123,7 @@ func (s *Settings[C]) importFiles() {
 		s.importStream(reader{s.files.format, r})
 		f.Close()
 
-		s.fileWatch.watchList[fn] = fn
+		tmpWatchList[fn] = fn
 
 	}
 
@@ -125,8 +136,9 @@ func (s *Settings[C]) importFiles() {
 			continue
 		}
 		s.importStream(reader{f.format, r})
+
 		r.Close()
-		s.fileWatch.watchList[f.path] = f.path
+		tmpWatchList[f.path] = f.path
 	}
 
 }