PR Watcher #16
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # Workflow that runs periodically to check whether PRs have been imported into | |
| # Gerrit and if they have been merged. The workflow adds a PR comment after | |
| # import and after merge. PRs that are merged upstream are then closed. | |
| name: PR Watcher | |
| on: | |
| workflow_dispatch: | |
| schedule: | |
| - cron: "*/10 * * * *" # Every 10 minutes | |
| jobs: | |
| check: | |
| name: Check Copybara Import Status | |
| runs-on: ubuntu-latest | |
| permissions: | |
| actions: write | |
| steps: | |
| - name: Check Pull Requests | |
| uses: actions/github-script@v6 | |
| with: | |
| script: | | |
| // Get all open PRs. | |
| const pulls = await github.rest.pulls.list({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| state: 'open', | |
| base: 'main', | |
| }); | |
| for (const pull of pulls.data) { | |
| const query = `query($owner:String!, $name:String!, $pullNumber:Int!, $statusContext:String!) { | |
| repository(owner:$owner, name:$name) { | |
| pullRequest(number:$pullNumber) { | |
| commits(last:1) { | |
| nodes { | |
| commit { | |
| status { | |
| context(name: $statusContext) { | |
| state | |
| targetUrl | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| }`; | |
| // Query the import/copybara status check. | |
| const result = await github.graphql(query, { | |
| owner: context.repo.owner, | |
| name: context.repo.repo, | |
| pullNumber: pull.number, | |
| statusContext: 'import/copybara', | |
| }); | |
| const nodes = result.repository.pullRequest.commits.nodes; | |
| const commit = nodes[0].commit; | |
| if (commit && commit.status && commit.status.context) { | |
| // Forward the status check information to the pr-manager workflow. | |
| await github.rest.actions.createWorkflowDispatch({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| ref: 'main', | |
| workflow_id: 'pr-manager.yml', | |
| inputs: { | |
| pullNumber: pull.number.toString(), | |
| state: commit.status.context.state, | |
| targetUrl: commit.status.context.targetUrl, | |
| }, | |
| }); | |
| } | |
| // Look through all timeline events on the PR. | |
| // When the PR is merged upstream, it will include a backreference back to | |
| // the PR in the commit message. | |
| const timeline = github.paginate.iterator(github.rest.issues.listEventsForTimeline, { | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: pull.number, | |
| }); | |
| for await (const { data: timelineData } of timeline) { | |
| for (const timelineItem of timelineData) { | |
| if (timelineItem.event === 'referenced' && timelineItem.commit_id) { | |
| try { | |
| // Compare commit ids against refs/heads/main to see if they are | |
| // included in the main branch. | |
| const compare = await github.rest.repos.compareCommitsWithBasehead({ | |
| basehead: `${timelineItem.commit_id}...refs/heads/main`, | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| }); | |
| if (compare.data.status == "ahead" || compare.data.status == "identical") { | |
| // This is a commit that has already been merged into main. | |
| const commit = await github.rest.repos.getCommit({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| ref: timelineItem.commit_id, | |
| }); | |
| const message = commit.data.commit.message; | |
| const lines = message.split('\n'); | |
| for (const line of lines) { | |
| // Check if the commit has a footer referencing a PR. | |
| const tag = 'GITHUB_PR_HEAD_SHA='; | |
| if (line.startsWith(tag)) { | |
| const sha = line.slice(tag.length); | |
| // The merged commit footer matches the PR sha. | |
| if (pull.head.sha === sha) { | |
| // Close the PR. | |
| await github.rest.actions.createWorkflowDispatch({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| ref: 'main', | |
| workflow_id: 'pr-manager.yml', | |
| inputs: { | |
| pullNumber: pull.number.toString(), | |
| state: 'merged', | |
| targetUrl: commit.data.html_url, | |
| }, | |
| }); | |
| } | |
| } | |
| } | |
| } | |
| } catch (err) { | |
| // This is OK because not all commits will be comparable. | |
| console.warn(err); | |
| } | |
| } | |
| } | |
| } | |
| } |