From 526a3c9dbe7e90e845ed8f8615388128181e7e0e Mon Sep 17 00:00:00 2001
From: David Badura <david.badura@patchlevel.de>
Date: Sat, 17 Oct 2026 19:38:34 +0200
Subject: [PATCH] Cancel outdated CI runs

Adds a concurrency group to the CI workflows, so a new push to a pull
request or branch cancels the runs still going for the previous commit
instead of letting them finish for nothing. The group is
github.workflow_ref (workflow file plus ref, refs/pull/<number>/merge
for pull requests), so two workflows with the same name and two fork
pull requests with the same branch name never cancel each other.
Release, notify and docs deploy workflows are left as they are.
---
 .github/workflows/backward-compatibility-check.yml | 4 ++++
 .github/workflows/coding-standard.yml              | 4 ++++
 .github/workflows/docs-check.yml                   | 4 ++++
 .github/workflows/mutation-tests-diff.yml          | 4 ++++
 .github/workflows/mutation-tests.yml               | 4 ++++
 .github/workflows/phpstan.yml                      | 4 ++++
 .github/workflows/unit.yml                         | 4 ++++
 7 files changed, 28 insertions(+)

diff --git a/.github/workflows/backward-compatibility-check.yml b/.github/workflows/backward-compatibility-check.yml
index e086865..7108320 100644
--- a/.github/workflows/backward-compatibility-check.yml
+++ b/.github/workflows/backward-compatibility-check.yml
@@ -5,6 +5,10 @@ name: "Backward Compatibility Check"
 on:
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow_ref }}
+  cancel-in-progress: true
+
 jobs:
   roave-backwards-compatibility-check:
     name: "Backward Compatibility Check"
diff --git a/.github/workflows/coding-standard.yml b/.github/workflows/coding-standard.yml
index f3a8c16..ae5893d 100644
--- a/.github/workflows/coding-standard.yml
+++ b/.github/workflows/coding-standard.yml
@@ -9,6 +9,10 @@ on:
             - "[0-9]+.[0-9]+.x"
             - "renovate/*"
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     static-analysis-coding-standard:
         name: "Static Analysis by patchlevel/coding-standard"
diff --git a/.github/workflows/docs-check.yml b/.github/workflows/docs-check.yml
index ec7b7f6..39cf3ac 100644
--- a/.github/workflows/docs-check.yml
+++ b/.github/workflows/docs-check.yml
@@ -8,6 +8,10 @@ on:
         branches:
             - "[0-9]+.[0-9]+.x"
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     checkdocs:
         name: "Check Docs"
diff --git a/.github/workflows/mutation-tests-diff.yml b/.github/workflows/mutation-tests-diff.yml
index d9b2025..759a10e 100644
--- a/.github/workflows/mutation-tests-diff.yml
+++ b/.github/workflows/mutation-tests-diff.yml
@@ -5,6 +5,10 @@ name: "Mutation tests on diff"
 on:
     pull_request:
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     mutation-tests-diff:
         name: "Mutation tests on diff"
diff --git a/.github/workflows/mutation-tests.yml b/.github/workflows/mutation-tests.yml
index 4b0d987..88523b1 100644
--- a/.github/workflows/mutation-tests.yml
+++ b/.github/workflows/mutation-tests.yml
@@ -9,6 +9,10 @@ on:
             - "[0-9]+.[0-9]+.x"
             - "renovate/*"
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     mutation-tests:
         name: "Mutation tests"
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 2afec47..c768eb2 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -9,6 +9,10 @@ on:
             - "[0-9]+.[0-9]+.x"
             - "renovate/*"
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     static-analysis-phpstan:
         name: "Static Analysis by PHPStan"
diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 86deeb6..2e993e4 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -9,6 +9,10 @@ on:
             - "[0-9]+.[0-9]+.x"
             - "renovate/*"
 
+concurrency:
+    group: ${{ github.workflow_ref }}
+    cancel-in-progress: true
+
 jobs:
     phpunit:
         name: "Unit tests"