ci: validate that PR titles are conventional

.commitlintrc.json

@@ -0,0 +1,10 @@
+{
+  "extends": [
+    "@commitlint/config-conventional",
+    "@commitlint/config-nx-scopes"
+  ],
+  "rules": {
+    "footer-max-line-length": [0],
+    "body-max-line-length": [0]
+  }
+}

.github/workflows/validate-pr-title.yml

@@ -0,0 +1,31 @@
+name: Validate PR title
+
+on:
+  pull_request:
+    types: ['opened', 'edited', 'reopened', 'synchronize']
+
+permissions:
+  pull-requests: read
+  contents: read
+
+jobs:
+  validate-pr-title:
+    runs-on: ubuntu-latest
+    name: 'Validate PR title'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - name: Install pnpm
+        uses: pnpm/action-setup@d882d12c64e032187b2edb46d3a0d003b7a43598 # v2.4.0
+      - name: Setup NodeJs
+        id: setup-node
+        uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
+        with:
+          cache: pnpm
+      - name: Install dependencies
+        run: pnpm install
+      - name: Lint PR title
+        # TODO - forked until https://github.com/JulienKode/pull-request-name-linter-action/pull/227 is merged
+        uses: mattlewis92/pull-request-name-linter-action@9c7a21391dfe3e08dbc7247a1a748422a21d640c # v0.5.0
+        with:
+          configuration-path: './.commitlintrc.json'

package.json

@@ -21,6 +21,9 @@
     "@babel/plugin-syntax-decorators": "^7.22.10",
     "@babel/plugin-syntax-typescript": "^7.22.5",
     "@babel/types": "^7.23.0",
+    "@commitlint/cli": "^18.2.0",
+    "@commitlint/config-conventional": "^18.1.0",
+    "@commitlint/config-nx-scopes": "^18.3.0",
     "@craftamap/esbuild-plugin-html": "^0.6.1",
     "@nx/angular": "^17.0.2",
     "@nx/eslint": "17.0.2",