ci: add GitHub Actions for commitlint and DCO checks

.github/workflows/commitlint.yml

@@ -0,0 +1,33 @@
+name: Commitlint
+
+on:
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    name: Check commit messages
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: |
+          npm install --save-dev @commitlint/config-conventional @commitlint/cli
+
+      - name: Validate current commit (last commit) with commitlint
+        if: github.event_name == 'push'
+        run: npx commitlint --from HEAD~1 --to HEAD --verbose
+
+      - name: Validate PR commits with commitlint
+        if: github.event_name == 'pull_request'
+        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose

.github/workflows/dco.yml

@@ -0,0 +1,20 @@
+name: DCO Check
+
+on:
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  dco-check:
+    runs-on: ubuntu-latest
+    name: Developer Certificate of Origin Check
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: DCO Check
+        uses: dcoapp/[email protected]
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

commitlint.config.js

@@ -0,0 +1,26 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules: {
+    'type-enum': [
+      2,
+      'always',
+      [
+        'build',
+        'chore',
+        'ci',
+        'docs',
+        'feat',
+        'fix',
+        'perf',
+        'refactor',
+        'revert',
+        'style',
+        'test'
+      ]
+    ],
+    'subject-case': [2, 'never', ['start-case', 'pascal-case', 'upper-case']],
+    'subject-empty': [2, 'never'],
+    'subject-full-stop': [2, 'never', '.'],
+    'header-max-length': [2, 'always', 72]
+  }
+};