ValidatePRTitle.yml

# Enforces the PR title follows conventional commits
#
# NOTE
# Our base CI system is CircleCI, but for anything that interacts with the PR metadata works better in GHA so we use GHA
# here.

name: "Validate PR Title"

on:
  pull_request_target:
    types:
      - opened
      - edited
    branches:
      - main

permissions:
  pull-requests: write

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:
          types: |
            chore
            refactor
            fix
            feat

      - uses: marocchino/sticky-pull-request-comment@v2
        # When the previous steps fails, the workflow would stop. By adding this
        # condition you can continue the execution with the populated error message.
        if: always() && (steps.lint_pr_title.outputs.error_message != null)
        with:
          header: pr-title-lint-error
          message: |
            We require pull request titles to follow the [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/) and it looks like your proposed title needs to be adjusted.

            Details:

            ${{ steps.lint_pr_title.outputs.error_message }}

      # Delete a previous comment when the issue has been resolved
      - if: ${{ steps.lint_pr_title.outputs.error_message == null }}
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: pr-title-lint-error
          delete: true