feat: hot reload for config/templates and GitPython-based hot update with pre-update notification

updater.py

@@ -0,0 +1,69 @@
+"""Git 热更新：定期检查远端新版本，更新前先推送通知，再拉取并重启进程。
+
+基于 GitPython。
+"""
+import asyncio
+import logging
+import os
+import sys
+
+import git
+
+log = logging.getLogger("updater")
+
+
+class Updater:
+    def __init__(self, ob, cfg: dict):
+        self.ob = ob
+        self.interval = cfg.get("interval", 300)
+        self.groups = cfg.get("groups", []) or []
+        self.friends = cfg.get("friends", []) or []
+        self._updating = False
+        try:
+            self.repo = git.Repo(".")
+        except (git.InvalidGitRepositoryError, git.NoSuchPathError):
+            self.repo = None
+
+    def start(self):
+        if self.repo is None:
+            log.info("非 git 仓库，热更新已禁用")
+            return
+        self._task = asyncio.get_running_loop().create_task(self._loop())
+
+    async def stop(self):
+        if hasattr(self, "_task"):
+            self._task.cancel()
+
+    async def _loop(self):
+        log.info("热更新已启动: 每 %ds 检查一次远端", self.interval)
+        while True:
+            try:
+                await asyncio.sleep(self.interval)
+                if self.ob.connected and not self._updating:
+                    await self.check_once()
+            except asyncio.CancelledError:
+                break
+            except Exception:
+                log.exception("热更新检查出错")
+
+    async def check_once(self):
+        """检查远端；有更新则通知、拉取并重启进程。"""
+        self._updating = True
+        try:
+            await asyncio.to_thread(self.repo.remotes.origin.fetch)
+            refs = self.repo.remotes.origin.refs
+            remote = getattr(refs, "HEAD", None) or (refs[0] if refs else None)
+            if remote is None or remote.commit == self.repo.head.commit:
+                return
+            log.info("发现新版本: %s -> %s",
+                     self.repo.head.commit.hexsha[:8], remote.commit.hexsha[:8])
+            if self.ob.connected and (self.groups or self.friends):
+                await self.ob.broadcast(
+                    "[更新] 检测到新版本，正在更新并重启机器人...",
+                    self.groups, self.friends)
+            await asyncio.to_thread(self.repo.remotes.origin.pull, "--ff-only")
+            log.warning("更新完成，重启进程...")
+            await asyncio.sleep(1)
+            os.execv(sys.executable, [sys.executable] + sys.argv)
+        finally:
+            self._updating = False