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: '^(feat|themes|highlights|utils|plugins|config|fix|refactor|chore|tests|docs|style|perf|build|ci|revert|deps)(\(.*\))?(!)?:\ .*\ \(DEV-[0-9]+\)$'

        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 suffix the title with the issue number followed by a space, a conventional commit prefix, and a colon (e.g. feat: <commit message> (DEV-XXXX))"
                    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}" | head -n 1)
                    echo "Checking commit message: \"${commit_message}\""
                    if [[ ! "${commit_message}" =~ ${{ env.REGEX_VALIDATION_PATTERN }} ]]; then
                      echo "Error: Commit message in wrong format: \"${commit_message}\""
                  echo "Please suffix the commit message with the issue number followed by a space, a conventional commit prefix, and a colon (e.g. feat: <commit message> (DEV-XXXX))"
                      exit 1
                    fi
                  done