lint-pr-title.yml

name: "Lint Pull Request Titles"

on:
  pull_request_target:
    types:
      - opened
      - edited
      - synchronize

permissions:
  pull-requests: read

jobs:
  main:
    name: Validate PR title
    runs-on: ubuntu-latest
    steps:
      - uses: amannn/action-semantic-pull-request@v5
        id: lint_pr_title
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          # Configure which types are allowed (newline-delimited).
          # ref: biomejs/biome/CONTRIBUTING.md
          types: |
            build
            chore
            ci
            docs
            feat
            fix
            perf
            refactor
            release
            revert
            test
          # Configure that a scope must always be provided.
          requireScope: false
          # Configure which scopes are disallowed in PR titles.
          # These are regex patterns auto-wrapped in `^ $`.
          #
          # We disable the following scopes:
          # - `release` because we have the `release` type
          # - UPPERCASE titles because we promote the use of lowercase
          disallowScopes: |
            [A-Z]+
          # Configure additional validation for the subject based on a regex.
          # Ensures that the subject doesn't start with an uppercase character.
          subjectPattern: ^[^A-Z].*$
          # If `subjectPattern` is configured, you can use this property to override
          # the default error message that is shown when the pattern doesn't match.
          # The variables `subject` and `title` can be used within the message.
          subjectPatternError: |
            The subject "{subject}" found in the pull request title "{title}"
            didn't match the configured pattern.
            Please ensure that the subject doesn't start with an uppercase character.
            The scope should not be in UPPERCASE.