build: use built-in workflow cancelling

Author: nedbat

.github/workflows/cancel.yml

@@ -22,6 +22,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   coverage:
     name: "Python ${{ matrix.python-version }} on ${{ matrix.os }}"

.github/workflows/coverage.yml

@@ -41,6 +41,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   wheels:
     name: "Build ${{ matrix.os }} ${{ matrix.py }} ${{ matrix.arch }} wheels"

.github/workflows/kit.yml

@@ -25,6 +25,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   tests:
     name: "Python ${{ matrix.python-version }}"

.github/workflows/python-nightly.yml

@@ -21,6 +21,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   lint:
     name: "Pylint etc"

.github/workflows/quality.yml

@@ -22,6 +22,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   tests:
     name: "Python ${{ matrix.python-version }} on ${{ matrix.os }}"