trigger_rebase.yml

name: Trigger Rebase

on:
  push:
    branches:
      - develop
env:
  AUTO_REBASE_PERSONAL_ACCESS_TOKEN: ${{ secrets.AUTO_REBASE_PERSONAL_ACCESS_TOKEN }}
jobs:
  fetch_all_prs_awaiting_automerge:
    runs-on: ubuntu-latest
    outputs:
      pr_numbers: ${{ steps.get-all-awaiting-pr-numbers.outputs.pr_numbers }}
    steps:
      - name: Get all awaiting PR numbers
        id: get-all-awaiting-pr-numbers
        run: |
          PR_NUMBERS=$(curl https://api.github.com/repos/UKGovernmentBEIS/beis-report-official-development-assistance/pulls\?state\=open | jq -c '.[] | select(.auto_merge!=null) | .number | [.]')
          echo "::set-output name=pr_numbers::$PR_NUMBERS"
  trigger_rebase_action:
    if: ${{ needs.fetch_all_prs_awaiting_automerge.outputs.pr_numbers != '' }}
    strategy:
      matrix:
        pr_number: ${{ fromJson(needs.fetch_all_prs_awaiting_automerge.outputs.pr_numbers) }}
    needs: fetch_all_prs_awaiting_automerge
    runs-on: ubuntu-latest
    steps:
      - name: Get the latest ref for ${{ matrix.pr_number }}
        run: |
          PR_DATA=$(curl https://api.github.com/repos/UKGovernmentBEIS/beis-report-official-development-assistance/pulls/${{ matrix.pr_number }})
          echo "ref=$(echo $PR_DATA | jq ".head.ref") >> $GITHUB_ENV"
      - name: Checkout the latest code for ${{ matrix.pr_number }}
        uses: actions/checkout@v2
        with:
          token: ${{ secrets.AUTO_REBASE_PERSONAL_ACCESS_TOKEN }}
          fetch-depth: 0
          ref: ${{ ENV.ref }}
      - name: Automatic Rebase
        uses: dxw/rebase@master
        env:
          GITHUB_TOKEN: ${{ secrets.AUTO_REBASE_PERSONAL_ACCESS_TOKEN }}
          PR_NUMBER: ${{ matrix.pr_number }}