lint-PR-title.yml

name: Lint Pull Request Title

on:
  pull_request:
    types:
      - opened
      - edited
      - reopened

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions-ecosystem/action-regex-match@v2
        id: regex-match
        with:
          text: ${{ github.event.pull_request.title }}
          regex: '(?:add|update|task|chore|feat|fix|refactor)\([a-z-A-Z]+\):\s.+'

      - uses: actions-ecosystem/action-create-comment@v1
        if: ${{ steps.regex-match.outputs.match == '' }}
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          body: |
            :warning: The title of this PR is invalid.
            Please make the title match the regex `(?:add|update|task|chore|feat|fix|refactor)\([a-z-A-Z]+\):\s.+`.
            e.g.) `add(cli): enable --verbose flag`, `fix(api): avoid unexpected error in handler`

      - name: Add invalid PR title label if regex is not matching
        if: ${{ steps.regex-match.outputs.match == '' }}
        uses: buildsville/add-remove-label@v2.0.1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          labels: |
            invalid PR title
          type: add

      - name: Remove label if regex is matching
        if: ${{ steps.regex-match.outputs.match != '' }}
        uses: buildsville/add-remove-label@v2.0.1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          labels: |
            invalid PR title
          type: remove

      - run: exit 1
        if: ${{ steps.regex-match.outputs.match == '' }}