name: main branch sync

on:
  push:
    branches:
      - 'main'

jobs:
  branch_sync:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Code
        uses: actions/checkout@v2
        with:
          # persist-credentials: false allows us to use our own credentials for
          # pushing to the repository.  Otherwise, the default github actions token
          # is used.
          persist-credentials: false
          fetch-depth: 0

      - name: Update branch
        env:
          LLVMBOT_TOKEN: ${{ secrets.LLVMBOT_MAIN_SYNC }}
        run: |
          git push https://$LLVMBOT_TOKEN@github.com/${{ github.repository }} HEAD:master