From b7b1920846fc6dffdcca9aecdafd962d834c94a1 Mon Sep 17 00:00:00 2001
From: Leo Vasanko <git@vasanko.com>
Date: Mon, 2 Feb 2026 16:26:19 +0000
Subject: [PATCH] Make devserver verify that no servers are already running
 before starting them.

---
 template/scripts/devserver.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/template/scripts/devserver.py b/template/scripts/devserver.py
index 02a31e9..253e3d2 100755
--- a/template/scripts/devserver.py
+++ b/template/scripts/devserver.py
@@ -13,6 +13,7 @@ from pathlib import Path
 sys.path.insert(0, str(Path(__file__).with_name("fastapi-vue")))
 from devutil import (  # type: ignore
     ProcessGroup,
+    check_ports_free,
     logger,
     ready,
     setup_fastapi,
@@ -36,7 +37,7 @@ async def run_devserver(frontend: str, backend: str) -> None:
 
     async with ProcessGroup() as pg:
         npm_i = await pg.spawn(*npm_install, cwd=front)
-        await asyncio.sleep(0.2)  # reduce message overlap
+        await check_ports_free(viteurl, backurl)
         await pg.spawn(
             *fastapi,
             "--reload",