Auto-cancel old builds when new commit pushed to branch (#98009)

* Auto-cancel old builds when new commit pushed to branch

* Add a fallback

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

* Use the same group for all workflows.

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

.github/workflows/build.yml

@@ -25,6 +25,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   check_source:
     name: 'Check for source changes'

.github/workflows/build_msi.yml

@@ -18,6 +18,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   build:
     name: Windows Installer

.github/workflows/doc.yml

@@ -28,6 +28,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   build_doc:
     name: 'Docs'

.github/workflows/verify-ensurepip-wheels.yml

@@ -16,6 +16,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   verify:
     runs-on: ubuntu-latest