python server

server/src/_debug_server.py

@@ -0,0 +1,39 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+"""Debugging support for LSP."""
+
+import os
+import pathlib
+import runpy
+import sys
+
+
+def update_sys_path(path_to_add: str) -> None:
+    """Add given path to `sys.path`."""
+    if path_to_add not in sys.path and os.path.isdir(path_to_add):
+        sys.path.append(path_to_add)
+
+
+# Ensure debugger is loaded before we load anything else, to debug initialization.
+debugger_path = os.getenv("DEBUGPY_PATH", None)
+if debugger_path:
+    if debugger_path.endswith("debugpy"):
+        debugger_path = os.fspath(pathlib.Path(debugger_path).parent)
+
+    update_sys_path(debugger_path)
+
+    # pylint: disable=wrong-import-position,import-error
+    import debugpy
+
+    # 5678 is the default port, If you need to change it update it here
+    # and in launch.json.
+    debugpy.connect(5678)
+
+    # This will ensure that execution is paused as soon as the debugger
+    # connects to VS Code. If you don't want to pause here comment this
+    # line and set breakpoints as appropriate.
+    debugpy.breakpoint()
+
+SERVER_PATH = os.fspath(pathlib.Path(__file__).parent / "lsp_server.py")
+# NOTE: Set breakpoint in `lsp_server.py` before continuing.
+runpy.run_path(SERVER_PATH, run_name="__main__")