upstream-sync.yml

# .github/workflows/sync-upstream.yml
name: Sync Upstream

on:
  schedule:
    - cron: '0 */3 * * *' # Runs every 3 hours
  workflow_dispatch:

jobs:
  sync:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v2
      with:
        persist-credentials: false
        fetch-depth: 0

    - name: Pull latest changes from upstream
      run: |
        set -x
        git config --global user.email "sync@datadoghq.com"
        git config --global user.name "Datadog Syncup Service"
        git config --global checkout.defaultRemote "origin"
        git remote add upstream https://github.com/openjdk/jdk.git
        git fetch upstream
        git checkout upstream_base
        git checkout -b upstream-master upstream/master
        git checkout upstream_base
        git merge upstream/master
        git checkout master
        git merge --ff --no-commit upstream/master
        git add .
        git commit -m "Sync upstream" || true

    - name: Push changes to upstream_base
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GH_PAT }}
        branch: upstream_base

    - name: Push changes to master
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GH_PAT }}
        branch: master