fix(v03): forward sigterm from env reuse launcher (#2002)

deploy/runtime/launcher/hwlab-env-reuse-launcher.ts

@@ -1,4 +1,4 @@
-import { spawnSync } from "node:child_process";
+import { spawn, spawnSync } from "node:child_process";
 import { chmodSync, existsSync, mkdirSync, rmSync, symlinkSync, writeFileSync } from "node:fs";
 import path from "node:path";
 
@@ -89,6 +89,10 @@ function installHwpodAlias(commandName: string, relativeCli: string): void {
 }
 
 function run(command: string, args: string[], cwd: string, options: { replace?: boolean } = {}): void {
+  if (options.replace) {
+    runReplacingProcess(command, args, cwd);
+    return;
+  }
   const result = spawnSync(command, args, {
     cwd,
     env: process.env,
@@ -97,10 +101,56 @@ function run(command: string, args: string[], cwd: string, options: { replace?:
   if (result.error) fail(`${command} failed to start: ${result.error.message}`);
   if (result.signal) process.kill(process.pid, result.signal);
   const code = result.status ?? 0;
-  if (options.replace) process.exit(code);
   if (code !== 0) process.exit(code);
 }
 
+function runReplacingProcess(command: string, args: string[], cwd: string): void {
+  const child = spawn(command, args, {
+    cwd,
+    env: process.env,
+    stdio: "inherit",
+    detached: true
+  });
+  let settled = false;
+  const signalHandlers: Array<{ signal: string, handler: () => void }> = [];
+  const cleanup = () => {
+    for (const { signal, handler } of signalHandlers.splice(0)) {
+      process.off(signal, handler);
+    }
+  };
+  const forwardSignal = (signal: string) => {
+    if (!child.pid) return;
+    try {
+      process.kill(-child.pid, signal);
+    } catch {
+      try { child.kill(signal); } catch {}
+    }
+  };
+  for (const signal of ["SIGINT", "SIGTERM"]) {
+    const handler = () => forwardSignal(signal);
+    process.on(signal, handler);
+    signalHandlers.push({ signal, handler });
+  }
+  child.on("error", (error) => {
+    if (settled) return;
+    settled = true;
+    cleanup();
+    fail(`${command} failed to start: ${error.message}`);
+  });
+  child.on("exit", (code, signal) => {
+    if (settled) return;
+    settled = true;
+    cleanup();
+    if (signal) process.exit(signalExitCode(signal));
+    process.exit(code ?? 0);
+  });
+}
+
+function signalExitCode(signal: string): number {
+  const signals: Record<string, number> = { SIGHUP: 1, SIGINT: 2, SIGQUIT: 3, SIGTERM: 15 };
+  return 128 + (signals[signal] ?? 1);
+}
+
 function fail(message: string): never {
   process.stderr.write(`${JSON.stringify({ status: "failed", error: "hwlab_env_reuse_launcher_failed", message })}\n`);
   process.exit(1);