fast-forward.yaml

# This a small action to perform fast forward merging which is not supported by github by default.
# NB: since this by default is run using the default GITHUB_TOKEN it will not trigger subsequent work-flows.
# In order for this to be effective either a PAT or a github app (dependabot) should be setup 

name: Fast Forward PR
on: 
  issue_comment:
      types: [created]

jobs:
  fast_forward_job:
    name: Fast Forward
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/fast-forward')   
    runs-on: ubuntu-latest
    steps:
      # To use this repository's private action, you must check out the repository
      - name: Checkout
        uses: actions/checkout@v2
      # Basic use case example
      - name: Fast Forward PR
        id: ff-action
        uses:  endre-spotlab/fast-forward-js-action@2.1
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          success_message: 'Success! Fast forwarded ***target_base*** to ***source_head***! ```git checkout target_base && git merge source_head --ff-only``` '
          failure_message: 'Failed! Cannot do fast forward! - try merging the target back into source first.'