Refactor path mapping logic in Config class

- Updated add_path_mapping method to return a boolean indicating success or failure of mapping addition.
- Enhanced link scanning to only continue if a mapping was successfully added.
- Filtered paths to exclude those already mapped, improving efficiency in path handling.
- Added logging for existing mappings to provide better insights during execution.

py/config.py

@@ -51,23 +51,34 @@ class Config:
                     if self._is_link(entry.path):
                         target_path = os.path.realpath(entry.path)
                         if os.path.isdir(target_path):
-                            self.add_path_mapping(entry.path, target_path)
-                            self._scan_directory_links(target_path)
+                            # 只有当映射成功添加时才继续扫描目标目录
+                            if self.add_path_mapping(entry.path, target_path):
+                                self._scan_directory_links(target_path)
                     elif entry.is_dir(follow_symlinks=False):
                         self._scan_directory_links(entry.path)
         except Exception as e:
             logger.error(f"Error scanning links in {root}: {e}")
 
-    def add_path_mapping(self, link_path: str, target_path: str):
+    def add_path_mapping(self, link_path: str, target_path: str) -> bool:
         """添加符号链接路径映射
         target_path: 实际目标路径
         link_path: 符号链接路径
+        
+        Returns:
+            bool: True if mapping was added, False if target already exists
         """
         normalized_link = os.path.normpath(link_path).replace(os.sep, '/')
         normalized_target = os.path.normpath(target_path).replace(os.sep, '/')
+        
+        # 检查目标路径是否已经存在映射
+        if normalized_target in self._path_mappings:
+            logger.info(f"Target path already mapped: {normalized_target} -> {self._path_mappings[normalized_target]}, ignoring new mapping to {normalized_link}")
+            return False
+            
         # 保持原有的映射关系：目标路径 -> 链接路径
         self._path_mappings[normalized_target] = normalized_link
         logger.info(f"Added path mapping: {normalized_target} -> {normalized_link}")
+        return True
 
     def add_route_mapping(self, path: str, route: str):
         """添加静态路由映射"""
@@ -96,11 +107,17 @@ class Config:
         if not paths:
             raise ValueError("No valid loras folders found in ComfyUI configuration")
         
-        # 初始化路径映射
+        # initialize path mappings
+        # Filter out loras roots where real path is already mapped
+        filtered_paths = []
         for path in paths:
             real_path = os.path.normpath(os.path.realpath(path)).replace(os.sep, '/')
             if real_path != path:
-                self.add_path_mapping(path, real_path)
+                if self.add_path_mapping(path, real_path):
+                    filtered_paths.append(path)
+            else:
+                filtered_paths.append(path)
+        paths = filtered_paths
         
         return paths