ci: automatically lint commit messages

.commitlintrc.yml

@@ -0,0 +1,2 @@
+extends:
+  - '@commitlint/config-conventional'

.github/workflows/pr.yml

@@ -0,0 +1,19 @@
+name: Lint Commits
+
+on:
+  pull_request:
+
+jobs:
+  lint-commits:
+    timeout-minutes: 10
+    runs-on: ubuntu-latest
+    if: ${{ github.actor != 'dependabot[bot]' }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18.x'
+      - run: yarn --immutable --immutable-cache
+      - run: yarn commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose

package.json

@@ -21,6 +21,7 @@
   },
   "bin": "./dist/index.js",
   "devDependencies": {
+    "@commitlint/config-conventional": "^18.6.0",
     "@tsconfig/node18-strictest-esm": "^1.0.1",
     "@types/jest": "^29.4.0",
     "@types/luxon": "^3.2.0",
@@ -29,6 +30,7 @@
     "@typescript-eslint/eslint-plugin": "^5.55.0",
     "@typescript-eslint/parser": "^5.56.0",
     "auto-changelog": "^2.4.0",
+    "commitlint": "^18.6.0",
     "eslint": "^8.36.0",
     "eslint-config-prettier": "^8.8.0",
     "jest": "^29.4.1",