Build Impact Comment #2
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| # Copyright (c) Facebook, Inc. and its affiliates. | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| name: Build Impact Comment | |
| # zizmor:disable:dangerous-triggers -- only reads an artifact and posts a comment, no PR code execution. | |
| on: | |
| workflow_run: | |
| workflows: [Build Impact Analysis] | |
| types: | |
| - completed | |
| permissions: | |
| pull-requests: write | |
| issues: write | |
| actions: read | |
| jobs: | |
| post-comment: | |
| if: > | |
| github.event.workflow_run.event == 'pull_request' && | |
| github.event.workflow_run.conclusion == 'success' | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Download comment artifact | |
| uses: actions/download-artifact@v4 | |
| with: | |
| name: build-impact-comment | |
| github-token: ${{ github.token }} | |
| run-id: ${{ github.event.workflow_run.id }} | |
| - name: Get PR number | |
| id: pr | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| REPO: ${{ github.repository }} | |
| HEAD_OWNER: ${{ github.event.workflow_run.head_repository.owner.login }} | |
| HEAD_BRANCH: ${{ github.event.workflow_run.head_branch }} | |
| run: | | |
| pr_number=$(gh api \ | |
| "/repos/${REPO}/pulls?head=${HEAD_OWNER}:${HEAD_BRANCH}&state=open" \ | |
| -q '.[0].number // empty') | |
| if [ -z "$pr_number" ]; then | |
| echo "No open PR found for branch ${HEAD_BRANCH}" | |
| exit 0 | |
| fi | |
| echo "number=$pr_number" >> "$GITHUB_OUTPUT" | |
| - name: Post or update PR comment | |
| if: steps.pr.outputs.number | |
| uses: actions/github-script@v7 | |
| env: | |
| PR_NUMBER: ${{ steps.pr.outputs.number }} | |
| with: | |
| script: | | |
| const fs = require('fs'); | |
| const comment = fs.readFileSync('comment.md', 'utf8'); | |
| const marker = '## Build Impact Analysis'; | |
| const prNumber = parseInt(process.env.PR_NUMBER, 10); | |
| const { data: comments } = await github.rest.issues.listComments({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: prNumber, | |
| }); | |
| const existing = comments.find(c => | |
| c.user.login === 'github-actions[bot]' && c.body.includes(marker) | |
| ); | |
| if (existing) { | |
| await github.rest.issues.updateComment({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| comment_id: existing.id, | |
| body: comment, | |
| }); | |
| } else { | |
| await github.rest.issues.createComment({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: prNumber, | |
| body: comment, | |
| }); | |
| } |