pr_auto_commit.yml

name: PR Auto Commit Review

on:
  pull_request:
    branches:
      - develop
    types:
      - opened
      - reopened
      - synchronize
      - auto_merge_enabled
      - auto_merge_disabled

env:
  TITLE_REGEX: '^(chore|build|ci|docs|feat|fix|perf|refactor|test)(\(.+\))?:[[:blank:]].+$'
jobs:
  title:
    name: Lint merge commit
    runs-on: ubuntu-latest
    steps:
      - name: Print details
        env:
          GITHUB_CONTEXT: ${{ toJson(github.event) }}
        run: echo "$GITHUB_CONTEXT"

      - name: Add annotation for Angular commit message conventions
        run: |
          echo "::notice ::Verification of squash merge commit messages matching https://github.com/angular/angular/blob/main/CONTRIBUTING.md#commit."

      - name: Add annotation for sample commit message
        run: |
          echo '::notice ::Example of a valid commit message is: "fix(command): fix issue with command"'

      - name: Check auto-merge is enabled
        if: ${{ !github.event.pull_request.auto_merge }}
        run: |
          echo "::error ::Enable auto-merge (squash) on this PR. When enabling auto-merge, provide a commit message matching: ${{ env.TITLE_REGEX }}"
          exit 1

      - name: Print commit title
        run: |
          echo "${{ github.event.pull_request.auto_merge.commit_title }}"

      - name: Print commit message
        run: |
          echo "${{ github.event.pull_request.auto_merge.commit_message }}"

      - name: Fail if release branch contains breaking change (commit title)
        if: ${{ contains(github.event.pull_request.auto_merge.commit_title, 'BREAKING CHANGE') && startsWith(github.base_ref, 'release/') }}
        run: |
          echo "::error ::PRs to a release branch must not contain breaking changes."
          exit 1

      - name: Fail if release branch contains breaking change (commit message)
        if: ${{ contains(github.event.pull_request.auto_merge.commit_message, 'BREAKING CHANGE') && startsWith(github.base_ref, 'release/') }}
        run: |
          echo "::error ::PRs to a release branch must not contain breaking changes."
          exit 1

      - name: Fail if features are merged to release branches
        if: ${{ startsWith(github.event.pull_request.auto_merge.commit_title, 'feat') && startsWith(github.base_ref, 'release/y') }}
        run: |
          echo "::error ::PRs to a release branch must not contain features."
          exit 1

      - name: Check squash merge commit title
        id: check-title
        run: |
          echo '${{ github.event.pull_request.auto_merge.commit_title }}'
          [[ '${{ github.event.pull_request.auto_merge.commit_title }}' =~ ${{ env.TITLE_REGEX }} ]] && exit 0 || echo "missing-id=true" >> $GITHUB_OUTPUT

      - name: Fail for malformed squash merge commit title
        if: ${{ steps.check-title.outputs.missing-id == 'true' }}
        run: |
          echo "::error ::The title of your squash merge commit message does not match the expected format. It should match this regex: ${{ env.TITLE_REGEX }}"
          exit 1