ci: check pr title with commitlint (#828)

* Add workflow to lint PR title on PRs

* Install necessary packages for commitlint permanently

* Trigger workflow only if the target branch is main

* test

* Revert "test"

This reverts commit fb6e0e8.

Author: reakaleek

.github/workflows/opentelemetry.yml

@@ -7,6 +7,7 @@ on:
       - ci
       - dist-tag
       - e2e
+      - pr-title-lint
       - release
     types: [completed]
 

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

@@ -0,0 +1,25 @@
+name: pr-title-lint
+
+on:
+  pull_request_target:
+    branches:
+      - main
+    types:
+      - opened
+      - synchronize
+      - edited
+
+jobs:
+  pr-title-lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          cache: npm
+          node-version-file: .nvmrc
+      - run: npm ci
+      - name: Lint PR title
+        run: echo "${PR_TITLE}" | npx commitlint
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}

commitlint.config.js

@@ -0,0 +1,26 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2020-present, Elastic NV
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+module.exports = { extends: ['@commitlint/config-conventional'] };