From 0dd6784b8c2615dea1e53f471912dee85e0c7f2c Mon Sep 17 00:00:00 2001
From: Prayuj Tuli <prayujtuli@hotmail.com>
Date: Mon, 24 Aug 2026 23:24:16 -0400
Subject: [PATCH] ci: cancel deleted branch deploys

---
 .github/workflows/build-deploy.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/build-deploy.yml b/.github/workflows/build-deploy.yml
index d001591..ca7b5c3 100644
--- a/.github/workflows/build-deploy.yml
+++ b/.github/workflows/build-deploy.yml
@@ -7,6 +7,12 @@ on:
 
   workflow_dispatch:
 
+# Normalize the branch name across push and delete events so deleting a merged
+# branch cancels its in-flight preview deploy before cleanup runs.
+concurrency:
+  group: nimbus-cityio-web-${{ github.event_name == 'delete' && github.event.ref || github.ref_name }}
+  cancel-in-progress: ${{ github.event_name == 'delete' }}
+
 jobs:
   build-and-deploy:
     if: github.event_name != 'delete'