autosquash.yml

name: Autosquash
on:
  check_run:
    types:
      # Check runs completing successfully can unblock the corresponding pull requests and make them mergeable.
      - completed
  pull_request:
    types:
      # A closed pull request makes the checks on the other pull request on the same base outdated.
      - closed
      # Adding the autosquash label to a pull request can trigger an update or a merge.
      - labeled
  pull_request_review:
    types:
      # Review approvals can unblock the pull request and make it mergeable.
      - submitted
  # Success statuses can unblock the corresponding pull requests and make them mergeable.
  status: {}

jobs:
  autosquash:
    name: Autosquash
    runs-on: ubuntu-18.04
    if: github.event.pull_request.head.repo.full_name == github.repository
    steps:
      - uses: tibdex/autosquash@v2
        with:
          # The built-in secrets.GITHUB_TOKEN cannot yet be used because of this limitation:
          # https://gh.neting.ccmunity/t5/GitHub-Actions/Triggering-a-new-workflow-from-another-workflow/td-p/31676
          # In the meantime, use a token granting write access on the repo:
          # - a GitHub App token
          #   See https://github.com/marketplace/actions/github-app-token.
          # - a personal access token
          #   See https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line.
          github_token: ${{ secrets.AUTOSQUASH_TOKEN }}