backup.yml

name: Backup Fork and Sync

on:
  schedule:
    - cron: '0 0 * * 0'  # 每週日午夜執行
  workflow_dispatch:  # 允許手動觸發

env:
  UPSTREAM_REPO: ${{ vars.UPSTREAM_REPO || 'https://github.com/facebookresearch/detectron2.git' }}
  MAIN_BRANCH: ${{ vars.MAIN_BRANCH || 'main' }}

jobs:
  backup-and-sync:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.PAT_TOKEN }}

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

      - name: Tag current state
        run: |
          TIMESTAMP=$(date +"%Y%m%d%H%M%S")
          git tag -a "pre-sync-$TIMESTAMP" -m "Pre-sync state on $TIMESTAMP"
          git push origin "pre-sync-$TIMESTAMP"

      - name: Add upstream repository
        run: |
          git remote add upstream ${{ env.UPSTREAM_REPO }} || git remote set-url upstream ${{ env.UPSTREAM_REPO }}
          git fetch --all --tags

      - name: Sync and handle conflicts
        run: |
          branches=$(git branch -r | grep 'origin/' | grep -v 'origin/HEAD' | sed 's/origin\///')
          
          for branch in $branches; do
            echo "Processing branch: $branch"
            
            if git ls-remote --exit-code --heads upstream $branch > /dev/null 2>&1; then
              git checkout -B $branch origin/$branch
              
              echo "Changes in upstream $branch:"
              git log --oneline $branch..upstream/$branch
              
              if git merge upstream/$branch --no-edit --allow-unrelated-histories; then
                echo "Successfully merged changes for $branch"
              else
                echo "Merge conflict in $branch. Creating a new branch with upstream changes."
                git merge --abort
                conflict_branch="${branch}-upstream-changes"
                git checkout -b $conflict_branch upstream/$branch
                echo "Created new branch $conflict_branch with upstream changes"
                git push origin $conflict_branch
                echo "Please manually review and merge changes from $conflict_branch into $branch"
                git checkout $branch
              fi
              git push origin $branch || echo "Failed to push $branch, please check and push manually if needed"
            else
              echo "Branch $branch does not exist in upstream. Skipping."
            fi
          done

      - name: Create post-sync version tag
        run: |
          TIMESTAMP=$(date +"%Y%m%d%H%M%S")
          git tag -a "post-sync-$TIMESTAMP" -m "Post-sync state on $TIMESTAMP"
          git push origin "post-sync-$TIMESTAMP"

      - name: Generate sync report
        if: always()
        run: |
          echo "Sync Report" > sync_report.md
          echo "===========" >> sync_report.md
          echo "" >> sync_report.md
          git branch -r | grep 'origin/' | grep -v 'origin/HEAD' | sed 's/origin\///' | while read branch; do
            echo "## Branch: $branch" >> sync_report.md
            if git log HEAD..origin/$branch --oneline | grep -q .; then
              echo "Status: Changes synced" >> sync_report.md
              echo "Changes:" >> sync_report.md
              git log HEAD..origin/$branch --oneline >> sync_report.md
            else
              echo "Status: No changes or sync failed" >> sync_report.md
            fi
            echo "" >> sync_report.md
          done

      - name: Upload sync report
        if: always()
        uses: actions/upload-artifact@v3
        with:
          name: sync-report
          path: sync_report.md