name: Composer Diff
on:
  pull_request:
    paths:
      - "composer.lock"
jobs:
  composer-diff:
    name: Composer Diff
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          # Required to make it possible to compare with PR base branch
          fetch-depth: 0

      - name: Generate composer diff
        # To reference the output in comment
        id: composer_diff
        uses: IonBazan/composer-diff-action@v1

      - uses: marocchino/sticky-pull-request-comment@v2
        # An empty diff result will break this action.
        if: ${{ steps.composer_diff.outputs.composer_diff_exit_code != 0 }}
        with:
          # Creates a collapsed comment with the report
          header: composer-diff
          message: |
            <details>
            <summary>Composer package changes</summary>

            ${{ steps.composer_diff.outputs.composer_diff }}

            </details>