Add psutil dependency and enhance process termination handling

pyproject.toml

@@ -28,7 +28,8 @@ classifiers = [
 dependencies = [
   "jedi-language-server==0.41.1",
   "requests==2.32.3",
-  "typing-extensions>=4.2.0"
+  "typing-extensions>=4.2.0",
+  "psutil (>=7.0.0,<8.0.0)"
 ]
 
 [project.urls]

src/multilspy/lsp_protocol_handler/server.py

@@ -32,6 +32,7 @@
 import dataclasses
 import json
 import os
+import psutil
 from typing import Any, Dict, List, Optional, Union
 
 from .lsp_requests import LspNotification, LspRequest
@@ -241,6 +242,10 @@ async def stop(self) -> None:
             except asyncio.TimeoutError:
                 process.kill()
 
+                for child in psutil.Process(process.pid).children(recursive=True):
+                    child.kill()
+
+
     async def shutdown(self) -> None:
         """
         Perform the shutdown sequence for the client, including sending the shutdown request to the server and notifying it of exit