cloud: production gaps (worker loop + true cancel, task result columns + migration, DB interface migration, metrics + backup)

cloud/sandbox.py

@@ -167,6 +167,32 @@ class LocalExecutor(Executor):
         return self._result_from_runner(
             task["id"], self.runner(cmd))
 
+    def popen_task(self, task, kind="dispatch"):
+        """进程组启动 host.py 子进程，返回 Popen（供真取消用）。
+
+        start_new_session=True 让子进程自成进程组，worker 取消时
+        killpg 才能连同子孙一起杀掉。注意：只有默认 runner（真实
+        subprocess）时才用本方法；单测注入的假 runner 走同步路径，
+        不走这里。
+        """
+        if not isinstance(task, dict) or task.get("id") is None:
+            raise ValueError("任务缺少 id")
+        if not task.get("prompt"):
+            raise ValueError("任务缺少 prompt")
+        cmd = self._base_command()
+        if kind == "run":
+            cmd += ["run", "--task", self._host_name(task),
+                    "--prompt", task["prompt"]]
+        else:
+            cmd += ["dispatch", "--name", self._host_name(task),
+                    "--task", task["prompt"]]
+            repo = task.get("repo") or self.repo
+            if repo:
+                cmd += ["--repo", repo]
+        return subprocess.Popen(cmd, stdout=subprocess.PIPE,
+                                stderr=subprocess.PIPE, text=True,
+                                start_new_session=True)
+
     def execute(self, task) -> dict:
         task_id = task.get("id") if isinstance(task, dict) else None
         if task_id is None: