[llvm] [Github][libcxx] Run Container Build Workflow on Stacked PRs (PR #150683)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/150683

Currently the container build workflow does not run on stacked PRs that do not have a branch target of main because of how the workflow is configured. This makes the workflow better confirm to the LLVM CI best practices around Github workflows:

https://llvm.org/docs/CIBestPractices.html#ensuring-workflows-run-on-the-correct-events

>From 28b4e737c142982268944b21c1321f53eb9e0d9b Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Fri, 25 Jul 2025 19:09:07 +0000
Subject: [PATCH] [Github][libcxx] Run Container Build Workflow on Stacked PRs

Currently the container build workflow does not run on stacked PRs that
do not have a branch target of main because of how the workflow is
configured. This makes the workflow better confirm to the LLVM CI best
practices around Github workflows:

https://llvm.org/docs/CIBestPractices.html#ensuring-workflows-run-on-the-correct-events
---
 .github/workflows/libcxx-build-containers.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/libcxx-build-containers.yml b/.github/workflows/libcxx-build-containers.yml
index 564a79341edb1..f432e3ddd5d1e 100644
--- a/.github/workflows/libcxx-build-containers.yml
+++ b/.github/workflows/libcxx-build-containers.yml
@@ -18,8 +18,6 @@ on:
       - 'libcxx/utils/ci/**'
       - '.github/workflows/libcxx-build-containers.yml'
   pull_request:
-    branches:
-      - main
     paths:
       - 'libcxx/utils/ci/**'
       - '.github/workflows/libcxx-build-containers.yml'