pull_request_rules:

  - name: Automatic merge on approval
    conditions:
      - base=master
      # number of review approvals
      - "#approved-reviews-by>=3"
      # no waiting or assigned review
      - "#review-requested=0"
      # no requested chnages from any reviewer
      - "#changes-requested-reviews-by=0"
      # this serves as ALL check has to pass as we have actually 27 tests in total
      - "#status-success>=27"
      # this is just in case since we rely on GPU tests (note: redundand to the above)
      - status-success=continuous-integration/drone/pr
      # this is patter-like, unofrunatly serves as `any(...)` (note: redundand to the above)
      - "status-success~=^ci/circleci:"
      # no conflict with master branch
      - -conflict
      # was not closed yet
      - -closed
    actions:
      delete_head_branch: {}
      merge:
        # https://doc.mergify.io/merge-action.html#strict-merge
        # (on head branch) $ git merge --no-ff base
        # (on head branch) # Wait for CI to go green
        # (on head branch) # Squash all commits
        # (on base branch) $ git merge --ff head
        strict: true
        method: squash
      comment:
        message: Great job! =)

  - name: warn on conflicts
    conditions:
      - conflict
    actions:
      comment:
        message: This pull request is now in conflict... :(

  - name: add core reviewer
    conditions:
      # number of review approvals
      - "#approved-reviews-by<3"
    actions:
      request_reviews:
        teams:
          - core-contributors