From 446bb4e4702d7a6d5fd69f6f4ddb6f890324e601 Mon Sep 17 00:00:00 2001
From: Gregg Tavares <github@greggman.com>
Date: Thu, 17 Oct 2024 09:55:46 +0900
Subject: [PATCH] address comments

---
 build/tools/serve.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/build/tools/serve.js b/build/tools/serve.js
index 960fc18d..0e7d1a53 100644
--- a/build/tools/serve.js
+++ b/build/tools/serve.js
@@ -3,15 +3,18 @@ import { mkdirSync } from 'fs';
 
 mkdirSync('out', { recursive: true });
 
-const spawns = [];
+const spawns = new Set();
 
 function spawnAndCheck(cmd, args, options) {
   const s = spawn(cmd, args, options);
-  spawns.push(s);
+  spawns.add(s);
   s.on('close', (code) => {
-    console.log(cmd, 'exited with code:', code);
-    spawns.forEach((s) => s.kill());
-    process.exit(code);
+    spawns.delete(s);
+    if (code !== 0) {
+      console.error(cmd, 'exited with code:', code);
+      [...spawns].forEach((s) => s.kill());
+      process.exit(code);
+    }
   });
 }