Upstream-sync → protected master #791
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| name: Upstream-sync → protected master | |
| on: | |
| schedule: # run every night | |
| - cron: '7 2 * * *' | |
| workflow_dispatch: # (optional) manual trigger | |
| permissions: # minimum perms the job needs | |
| contents: write # push the sync branch | |
| pull-requests: write # open, approve & merge the PR | |
| concurrency: # never let two syncs race | |
| group: ${{ github.workflow }}-${{ github.ref }} | |
| cancel-in-progress: true | |
| jobs: | |
| sync: | |
| runs-on: ubuntu-latest | |
| steps: | |
| # 1. full clone so we always have the latest tip | |
| - uses: actions/checkout@v4 | |
| with: | |
| fetch-depth: 0 | |
| token: ${{ secrets.GITHUB_TOKEN }} | |
| # 2. fetch upstream & copy it to a side branch | |
| - name: Update upstream-sync branch | |
| env: | |
| GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| run: | | |
| # Configure git identity | |
| git config --global user.email "[email protected]" | |
| git config --global user.name "GitHub Action" | |
| git remote add upstream https://github.com/openjdk/jdk17u-dev.git | |
| git fetch upstream master | |
| echo "=== Current branch status ===" | |
| git log --oneline -5 | |
| echo "=== Upstream status ===" | |
| git log --oneline -5 upstream/master | |
| # Create sync branch from current master to preserve workflows | |
| git checkout -B upstream-sync origin/master | |
| echo "=== About to merge upstream changes ===" | |
| git log --oneline -1 HEAD | |
| git log --oneline -1 upstream/master | |
| # Simple merge approach - let's see what happens | |
| if git merge upstream/master --no-edit --allow-unrelated-histories; then | |
| echo "=== Merge successful ===" | |
| git log --oneline -5 | |
| else | |
| echo "=== Merge failed, trying alternative approach ===" | |
| git merge --abort || true | |
| git reset --hard upstream/master | |
| # Restore our workflow files after taking upstream | |
| git checkout origin/master -- .github/workflows/ | |
| git add .github/workflows/ | |
| git commit -m "Preserve local workflow files during upstream sync" | |
| echo "=== Alternative approach completed ===" | |
| git log --oneline -5 | |
| fi | |
| echo "=== Final branch status before push ===" | |
| git log --oneline -10 | |
| git push -f origin upstream-sync | |
| # 3. Open or update the PR `upstream-sync -> master` | |
| - name: Create or update pull request | |
| env: | |
| GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| run: | | |
| # Check if PR already exists | |
| PR_NUMBER=$(gh pr list --head upstream-sync --base master --json number --jq '.[0].number' || echo "") | |
| if [ -n "$PR_NUMBER" ]; then | |
| echo "PR #$PR_NUMBER already exists, updating it" | |
| gh pr edit $PR_NUMBER --title "Automated upstream merge" --body "Nightly sync of openjdk/jdk17u-dev:master into this fork" | |
| else | |
| echo "Creating new PR" | |
| PR_NUMBER=$(gh pr create --head upstream-sync --base master --title "Automated upstream merge" --body "Nightly sync of openjdk/jdk17u-dev:master into this fork" --json number --jq '.number') | |
| echo "Created PR #$PR_NUMBER" | |
| fi | |
| echo "pr-number=$PR_NUMBER" >> $GITHUB_OUTPUT | |
| # 4. Auto-approve that PR | |
| - name: Auto-approve PR | |
| env: | |
| GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| run: | | |
| PR_NUMBER=$(gh pr list --head upstream-sync --base master --json number --jq '.[0].number') | |
| if [ -n "$PR_NUMBER" ]; then | |
| gh pr review $PR_NUMBER --approve --body "Auto-approved upstream sync" | |
| echo "Approved PR #$PR_NUMBER" | |
| fi | |
| # 5. Enable auto-merge so GitHub merges as soon as | |
| # branch protection requirements are satisfied | |
| - name: Enable auto-merge | |
| env: | |
| GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| run: | | |
| PR_NUMBER=$(gh pr list --head upstream-sync --base master --json number --jq '.[0].number') | |
| if [ -n "$PR_NUMBER" ]; then | |
| gh pr merge $PR_NUMBER --auto --merge | |
| echo "Enabled auto-merge for PR #$PR_NUMBER" | |
| fi |