add migration code

__init__.py

@@ -1,7 +1,37 @@
-from .modules import manager_ext_server
-from .modules import share_3rdparty
+legacy_manager_core_path = None
+manager_core_path = None
 
-WEB_DIRECTORY = "js"
 
-NODE_CLASS_MAPPINGS = {}
-__all__ = ['NODE_CLASS_MAPPINGS']
+def is_manager_core_exists():
+    global legacy_manager_core_path
+    global manager_core_path
+    import os
+    import folder_paths
+
+    comfy_path = os.path.dirname(folder_paths.__file__)
+    legacy_manager_core_path = os.path.join(comfy_path, 'custom_nodes', 'manager-core')
+    manager_core_path = legacy_manager_core_path
+
+    manager_core_path_file = os.path.join(comfy_path, 'manager_core_path.txt')
+    if os.path.exists(manager_core_path_file):
+        with open(manager_core_path_file, 'r') as f:
+            manager_core_path = os.path.join(f.read().strip(), 'manager-core')
+
+    return os.path.exists(manager_core_path) or os.path.exists(legacy_manager_core_path)
+
+
+if not is_manager_core_exists():
+    from .modules import migration_server
+    migration_server.manager_core_path = manager_core_path
+
+    WEB_DIRECTORY = "migration_js"
+    NODE_CLASS_MAPPINGS = {}
+else:
+    # Main code
+    from .modules import manager_ext_server
+    from .modules import share_3rdparty
+
+    WEB_DIRECTORY = "js"
+
+    NODE_CLASS_MAPPINGS = {}
+    __all__ = ['NODE_CLASS_MAPPINGS']