From 6fcc8727f5c14c28b988b4755f6ee0ebbbefd18d Mon Sep 17 00:00:00 2001
From: Patric Stout <truebrain@openttd.org>
Date: Sun, 26 Feb 2023 22:36:33 +0100
Subject: [PATCH] Change: [Actions] cancel previous run if pushing new PR

Lately we had a few times that people pushed to their PR branch
a few times to make small changes. Sadly, this triggers all CIs
every time, which takes ~20 minutes. As we are limited in the
amount of runners we get assigned to us, this means all other CI,
even for other repositories within OpenTTD, are delayed too.

We can avoid this by simply cancelling old runs when a new PR is
pushed. There is a downside: sometimes people already push a new
commit, but still want to know if the old one passed. That will
no longer be possible with this change.
---
 .github/workflows/ci-build.yml       | 4 ++++
 .github/workflows/codeql.yml         | 4 ++++
 .github/workflows/commit-checker.yml | 4 ++++
 .github/workflows/unused-strings.yml | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index e5b0947315..a9c868242e 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -9,6 +9,10 @@ on:
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 jobs:
   emscripten:
     name: Emscripten
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 153a4706c7..936c4c92d7 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -9,6 +9,10 @@ on:
     branches:
     - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 jobs:
   analyze:
     name: Analyze
diff --git a/.github/workflows/commit-checker.yml b/.github/workflows/commit-checker.yml
index 91fc54b104..1407757fc5 100644
--- a/.github/workflows/commit-checker.yml
+++ b/.github/workflows/commit-checker.yml
@@ -3,6 +3,10 @@ name: Commit checker
 on:
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 jobs:
   commit-checker:
     name: Commit checker
diff --git a/.github/workflows/unused-strings.yml b/.github/workflows/unused-strings.yml
index 6026671307..08a0cb26e7 100644
--- a/.github/workflows/unused-strings.yml
+++ b/.github/workflows/unused-strings.yml
@@ -3,6 +3,10 @@ name: Unused strings
 on:
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 jobs:
   unused-strings:
     name: Unused strings