sync-pr.yml

name: Automatically Sync PR with Base Branch

on:
  pull_request:
    types:
      - opened
      - synchronize

jobs:
  sync:
    runs-on: ubuntu-latest

    steps:
      - name: Check out code
        uses: actions/checkout@v2

      - name: Configure Git Identity
        run: |
          git config --global user.email "ci-build@aemforms"
          git config --global user.name "ci-build"

      - name: Validate branch names
        id: validate
        run: |
          echo "Validating branch names..."
          if ! [[ "${{ github.event.pull_request.head.ref }}" =~ ^[a-zA-Z0-9._/-]+$ ]]; then
            echo "Invalid characters in head ref"
            exit 1
          fi
          if ! [[ "${{ github.event.pull_request.base.ref }}" =~ ^[a-zA-Z0-9._/-]+$ ]]; then
            echo "Invalid characters in base ref"
            exit 1
          fi
          echo "::set-output name=head_ref::${{ github.event.pull_request.head.ref }}"
          echo "::set-output name=base_ref::${{ github.event.pull_request.base.ref }}"

      - name: Sync with Base Branch
        if: ${{ github.event.pull_request.base.ref != 'master' }}
        run: |
          git fetch origin ${{ steps.validate.outputs.head_ref }}
          git fetch origin ${{ steps.validate.outputs.base_ref }}
          git checkout ${{ steps.validate.outputs.base_ref }}
          git pull origin ${{ steps.validate.outputs.base_ref }}
          git checkout ${{ steps.validate.outputs.head_ref }}
          git pull origin ${{ steps.validate.outputs.head_ref }}
          git rebase ${{ steps.validate.outputs.base_ref }}
          git push --force origin ${{ steps.validate.outputs.head_ref }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}