check_pr_meta.yml

name: Check Pull Request Meta

on:
  pull_request:
    types:
      - opened
      - synchronize
      - edited

jobs:
  check-pr-meta:
    runs-on: ubuntu-20.04
    env:
      REGEX_VALIDATION_PATTERN: '^DEV-[0-9]+\ (feat|fix|refactor|chore|tests|docs|style|perf|build|ci|revert|deps)(\(.*\))?:\ '

    steps:
      - name: Check PR Title
        if: github.event_name == 'pull_request'
        env:
          PR_TITLE: "${{ github.event.pull_request.title }}"
        run: |
          # Check PR Title
          if ! echo "$PR_TITLE" | grep --perl-regexp --quiet "${{ env.REGEX_VALIDATION_PATTERN }}"
          then
            echo "Error: PR title in wrong format: \"$PR_TITLE\""
            echo "Please prefix the title with the issue number followed by a space, a conventional commit prefix, and a colon (e.g. \"DEV-XXXX feat: \")"
            exit 1
          fi

      - name: Checkout Code
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Check PR Commit Messages
        run: |
          # Check PR Commit Messages
          commit_range=""
          if [ "${{ github.event_name }}" == "push" ]; then
            commit_range="${{ github.event.before }}..${{ github.event.after }}"
          elif [ "${{ github.event_name }}" == "pull_request" ]; then
            commit_range="${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}"
          fi

          for commit_sha in $(git rev-list --no-merges "${commit_range}"); do
            commit_message=$(git log --format=%B -n 1 "${commit_sha}")
            if [[ ! "${commit_message}" =~ ${{ env.REGEX_VALIDATION_PATTERN }} ]]; then
              echo "Error: Commit message in wrong format: \"${commit_message}\""
              echo "Please prefix the commit message with the issue number followed by a space, a conventional commit prefix, and a colon (e.g. \"DEV-XXXX feat: \")"
              exit 1
            fi
          done