Add ghstack PR detection and error message #3
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| name: Check for ghstack PRs | |
| on: | |
| pull_request: | |
| types: [opened, reopened, synchronize] | |
| jobs: | |
| check-ghstack: | |
| runs-on: ubuntu-latest | |
| permissions: | |
| pull-requests: write | |
| steps: | |
| - name: Check for ghstack usage | |
| uses: actions/github-script@v7 | |
| with: | |
| script: | | |
| const pr = context.payload.pull_request; | |
| const headRef = pr.head.ref; | |
| const prBody = pr.body || ''; | |
| // ghstack branches follow pattern: gh/<username>/<number>/head | |
| const isGhstack = /^gh\/[^/]+\/\d+\/head$/.test(headRef); | |
| if (!isGhstack) { | |
| core.info('No ghstack patterns detected. PR is good to go!'); | |
| return; | |
| } | |
| core.info('ghstack PR detected'); | |
| // Check if we've already commented | |
| const { data: comments } = await github.rest.issues.listComments({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: pr.number, | |
| }); | |
| const alreadyCommented = comments.some(c => | |
| c.user.type === 'Bot' && c.body.includes('ghstack PRs are not supported') | |
| ); | |
| if (!alreadyCommented) { | |
| await github.rest.issues.createComment({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: pr.number, | |
| body: `## ⚠️ ghstack PRs are not supported. | |
| This pull request appears to be created using [ghstack](https://github.com/ezyang/ghstack). | |
| **We do not support ghstack in this repository.** | |
| Please resubmit as a regular pull request: | |
| 1. Create a branch from main | |
| 2. Cherry-pick or apply your changes | |
| 3. Open a new pull request | |
| See our [Contributing Guide](https://github.com/pytorch/tutorials/blob/main/CONTRIBUTING.md) for details.`, | |
| }); | |
| } | |
| core.setFailed('ghstack PRs are not supported. Please resubmit as a regular pull request.'); |