From 88f50470d3fac26a1f590f030095c22c4b60efd3 Mon Sep 17 00:00:00 2001
From: David Badura <david.badura@patchlevel.de>
Date: Sat, 17 Oct 2026 19:37:30 +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Subject: [PATCH] Cancel outdated CI runs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.yml               | 4 ++++
 .github/workflows/phpstan.yml                      | 4 ++++
 .github/workflows/unit.yml                         | 4 ++++
 6 files changed, 24 insertions(+)

diff --git a/.github/workflows/backward-compatibility-check.yml b/.github/workflows/backward-compatibility-check.yml
index afa5088..a75aafa 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 2628098..7009868 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.yml b/.github/workflows/mutation-tests.yml
index 38405bb..a59f942 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 d55aac2..2a9d2db 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 93ac525..c95f9dc 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"