fix(plugin): make installation lifecycle cancellable

app/application/plugin/lifecycle.py

@@ -0,0 +1,88 @@
+"""插件安装与启动同步之间共享的生命周期互斥。"""
+
+from __future__ import annotations
+
+import asyncio
+import threading
+from contextlib import asynccontextmanager, contextmanager
+from typing import Iterator
+
+
+class PluginLifecycleCoordinator:
+    """在事件循环和同步启动线程之间协调插件生命周期操作。"""
+
+    def __init__(self) -> None:
+        self._condition = threading.Condition()
+        self._active_plugins: set[str] = set()
+        self._startup_active = False
+
+    @staticmethod
+    def _normalize(plugin_id: str) -> str:
+        return (plugin_id or "").strip().lower()
+
+    def _try_acquire_plugin(self, plugin_id: str) -> bool:
+        normalized_id = self._normalize(plugin_id)
+        if not normalized_id:
+            raise ValueError("插件ID不能为空")
+        with self._condition:
+            if self._startup_active or normalized_id in self._active_plugins:
+                return False
+            self._active_plugins.add(normalized_id)
+            return True
+
+    def _release_plugin(self, plugin_id: str) -> None:
+        normalized_id = self._normalize(plugin_id)
+        with self._condition:
+            self._active_plugins.discard(normalized_id)
+            self._condition.notify_all()
+
+    def _try_acquire_startup(self) -> bool:
+        with self._condition:
+            if self._startup_active or self._active_plugins:
+                return False
+            self._startup_active = True
+            return True
+
+    def _release_startup(self) -> None:
+        with self._condition:
+            self._startup_active = False
+            self._condition.notify_all()
+
+    @asynccontextmanager
+    async def hold(self, plugin_id: str):
+        """异步持有单个插件的生命周期资格，不在线程池中等待锁。"""
+        while not self._try_acquire_plugin(plugin_id):
+            await asyncio.sleep(0.01)
+        try:
+            yield
+        finally:
+            self._release_plugin(plugin_id)
+
+    @contextmanager
+    def hold_sync(self, plugin_id: str) -> Iterator[None]:
+        """同步持有单个插件的生命周期资格。"""
+        normalized_id = self._normalize(plugin_id)
+        if not normalized_id:
+            raise ValueError("插件ID不能为空")
+        with self._condition:
+            while self._startup_active or normalized_id in self._active_plugins:
+                self._condition.wait()
+            self._active_plugins.add(normalized_id)
+        try:
+            yield
+        finally:
+            self._release_plugin(normalized_id)
+
+    @asynccontextmanager
+    async def hold_startup(self):
+        """异步持有启动同步的全局资格，阻止安装请求穿过启动收口。"""
+        while not self._try_acquire_startup():
+            await asyncio.sleep(0.01)
+        try:
+            yield
+        finally:
+            self._release_startup()
+
+
+plugin_lifecycle = PluginLifecycleCoordinator()
+