fast_forward.yml

name: Fast-forward merge a pull request

on:
  issue_comment:
    types:
      - created
      - edited

jobs:
  fast-forward:

    name: "Fast-forward"
    runs-on: ubuntu-latest

    permissions:
      contents: write  # Allows merging the PR.
      pull-requests: write  # Writing comments on PRs.
      issues: write  # Also required for posting comments on PRs.

    # Only run if the comment is one of the defined keywords.
    if: >-
      ${{
        github.event.issue.pull_request
        && contains(fromJSON('["/fast-forward", "/ff"]'), github.event.comment.body)
      }}

    steps:
      - name: "Fast forwarding"
        uses: MrThearMan/prff@v1

      - name: "Trigger additional pipelines for bots"
        # Only run if one of the defined bots is the pull request author.
        # https://github.com/City-of-Helsinki/tilavarauspalvelu-core/settings/variables/actions
        if: contains(fromJSON(vars.BOTS), github.event.pull_request.user.login)
        # We need to trigger additional pipelines manually,
        # since new pushes to main by bots do not trigger additional workflows.
        # https://docs.github.com/en/actions/security-for-github-actions/security-guides/automatic-token-authentication
        # Triggers all workflows with the `fast-forward` in `repository_dispatch`.
        run: |
          curl -L \
            -X POST \
            -H "Accept: application/vnd.github+json" \
            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            -H "User-Agent: ${{ github.repository }}" \
            https://api.github.com/repos/${{ github.repository }}/dispatches \
            -d '{"event_type":"fast-forward"}'