From c4673f11fc3c456fa7f3df87e956156a3df69b25 Mon Sep 17 00:00:00 2001
From: Francesco Chemolli <5175948+kinkie@users.noreply.github.com>
Date: Mon, 11 Nov 2024 18:24:25 +0000
Subject: [PATCH] CI: Cancel obsolete concurrent GitHub Actions workflow jobs
 (#1940)

If a new push happens to a staging branch or a PR branch, continuing to
run now-obsolete tests is pointless and wasteful. However, we do want to
finish any jobs running on previous master branch commits, so that every
master branch commit has full test results.
---
 .github/workflows/quick.yaml | 6 ++++++
 .github/workflows/slow.yaml  | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/.github/workflows/quick.yaml b/.github/workflows/quick.yaml
index affa40466b..aad03461d4 100644
--- a/.github/workflows/quick.yaml
+++ b/.github/workflows/quick.yaml
@@ -16,6 +16,12 @@ on:
     # test PRs targeting this branch code
     branches: [ "master" ]
 
+concurrency:
+  # Cancel ongoing tests in case of push to the same PR or staging branch,
+  # but let previous master commit tests complete.
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 env:
   # empty except for pull_request events
   PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number }}
diff --git a/.github/workflows/slow.yaml b/.github/workflows/slow.yaml
index 6604bb9ec0..0d60fa04ed 100644
--- a/.github/workflows/slow.yaml
+++ b/.github/workflows/slow.yaml
@@ -14,6 +14,11 @@ on:
   push:
     branches: [ "auto" ]
 
+concurrency:
+  # Cancel ongoing tests in case of push to staging branch.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   linux-distros:
 
-- 
2.47.3