Make multi-lang-server support OS name.

lsp_bridge.py

@@ -680,13 +680,7 @@ def open_file(self, filepath):
             create_file_action_with_single_server(filepath, lang_server_info, lsp_server)
         elif multi_lang_server:
             # Try to load multi language server when get-multi-lang-server return match one.
-            multi_lang_server_dir = Path(__file__).resolve().parent / "multiserver"
-            multi_lang_server_path = multi_lang_server_dir / "{}.json".format(multi_lang_server)
-
-            user_multi_lang_server_dir = Path(str(get_emacs_vars(["lsp-bridge-user-multiserver-dir"])[0])).expanduser()
-            user_multi_lang_server_path = user_multi_lang_server_dir / "{}.json".format(multi_lang_server)
-            if user_multi_lang_server_path.exists():
-                multi_lang_server_path = user_multi_lang_server_path
+            multi_lang_server_path = get_lang_server_path(multi_lang_server, True)
 
             with open(multi_lang_server_path, encoding="utf-8", errors="ignore") as f:
                 multi_lang_server_info = json.load(f)
@@ -1045,12 +1039,15 @@ def load_single_server_info(lang_server):
     with open(lang_server_info_path, encoding="utf-8", errors="ignore") as f:
         return read_lang_server_info(f)
 
-def get_lang_server_path(server_name):
-    server_dir = Path(__file__).resolve().parent / "langserver"
+def get_lang_server_path(server_name, is_multi_server=False):
+    lang_server_dir = "multiserver" if is_multi_server else "langserver"
+    lang_server_dir_var = "lsp-bridge-user-multiserver-dir" if is_multi_server else "lsp-bridge-user-langserver-dir"
+
+    server_dir = Path(__file__).resolve().parent / lang_server_dir
     server_path_current = server_dir / "{}_{}.json".format(server_name, get_os_name())
     server_path_default = server_dir / "{}.json".format(server_name)
 
-    user_server_dir = Path(str(get_emacs_vars(["lsp-bridge-user-langserver-dir"])[0])).expanduser()
+    user_server_dir = Path(str(get_emacs_vars([lang_server_dir_var])[0])).expanduser()
     user_server_path_current = user_server_dir / "{}_{}.json".format(server_name, get_os_name())
     user_server_path_default = user_server_dir / "{}.json".format(server_name)