auto-sync.yml

name: Auto Sync with Upstream

on:
  schedule:
    - cron: '0 0 * * *' # daily
  workflow_dispatch:

env:
  SYNC_BRANCH: master   # Change to main if your repo uses main

jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Set up git user
        run: |
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'

      - name: Add upstream remote and fetch
        run: |
          git remote | grep -q upstream || git remote add upstream https://github.com/jhlywa/chess.js.git
          git fetch upstream

      - name: Show pre-merge status
        run: git status

      - name: Merge upstream changes
        run: |
          git checkout ${{ env.SYNC_BRANCH }}
          git merge upstream/${{ env.SYNC_BRANCH }} --allow-unrelated-histories || true

      - name: Show post-merge status
        run: git status

      - name: Push changes if any
        env:
          GH_TOKEN: ${{ secrets.AUTO_SYNC }}
        run: |
          if [ -n "$(git status --porcelain)" ]; then
            git push https://x-access-token:${GH_TOKEN}@github.com/${{ github.repository }} ${{ env.SYNC_BRANCH }}
          else
            echo "No changes to push."
          fi