Bot: Comment on the Pull Request #73
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
| name: "Bot: Comment on the Pull Request" | |
| # read-write repo token | |
| # access to secrets | |
| on: | |
| workflow_run: | |
| workflows: ["Receive Pull Request"] | |
| types: | |
| - completed | |
| concurrency: | |
| group: pr-${{ github.event.workflow_run.pull_requests[0].number }} | |
| cancel-in-progress: true | |
| jobs: | |
| # Pull requests are valid if: | |
| # - they match the sha of the workflow run head commit | |
| # - they are open | |
| # - no .github files were committed | |
| test-pr: | |
| name: "Test if pull request is valid" | |
| runs-on: ubuntu-latest | |
| if: > | |
| github.event.workflow_run.event == 'pull_request' && | |
| github.event.workflow_run.conclusion == 'success' | |
| outputs: | |
| is_valid: ${{ steps.check-pr.outputs.VALID }} | |
| payload: ${{ steps.check-pr.outputs.payload }} | |
| number: ${{ steps.get-pr.outputs.NUM }} | |
| msg: ${{ steps.check-pr.outputs.MSG }} | |
| steps: | |
| - name: 'Download PR artifact' | |
| id: dl | |
| uses: carpentries/actions/download-workflow-artifact@main | |
| with: | |
| run: ${{ github.event.workflow_run.id }} | |
| name: 'pr' | |
| - name: "Get PR Number" | |
| if: ${{ steps.dl.outputs.success == 'true' }} | |
| id: get-pr | |
| run: | | |
| unzip pr.zip | |
| echo "NUM=$(<./NR)" >> $GITHUB_OUTPUT | |
| - name: "Fail if PR number was not present" | |
| id: bad-pr | |
| if: ${{ steps.dl.outputs.success != 'true' }} | |
| run: | | |
| echo '::error::A pull request number was not recorded. The pull request that triggered this workflow is likely malicious.' | |
| exit 1 | |
| - name: "Get Invalid Hashes File" | |
| id: hash | |
| run: | | |
| echo "json<<EOF | |
| $(curl -sL https://files.carpentries.org/invalid-hashes.json) | |
| EOF" >> $GITHUB_OUTPUT | |
| - name: "Check PR" | |
| id: check-pr | |
| if: ${{ steps.dl.outputs.success == 'true' }} | |
| uses: carpentries/actions/check-valid-pr@main | |
| with: | |
| pr: ${{ steps.get-pr.outputs.NUM }} | |
| sha: ${{ github.event.workflow_run.head_sha }} | |
| headroom: 3 # if it's within the last three commits, we can keep going, because it's likely rapid-fire | |
| invalid: ${{ fromJSON(steps.hash.outputs.json)[github.repository] }} | |
| fail_on_error: true | |
| # Create an orphan branch on this repository with two commits | |
| # - the current HEAD of the md-outputs branch | |
| # - the output from running the current HEAD of the pull request through | |
| # the md generator | |
| create-branch: | |
| name: "Create Git Branch" | |
| needs: test-pr | |
| runs-on: ubuntu-latest | |
| if: ${{ needs.test-pr.outputs.is_valid == 'true' }} | |
| env: | |
| NR: ${{ needs.test-pr.outputs.number }} | |
| permissions: | |
| contents: write | |
| steps: | |
| - name: 'Checkout md outputs' | |
| uses: actions/checkout@v4 | |
| with: | |
| ref: md-outputs | |
| path: built | |
| fetch-depth: 1 | |
| - name: 'Download built markdown' | |
| id: dl | |
| uses: carpentries/actions/download-workflow-artifact@main | |
| with: | |
| run: ${{ github.event.workflow_run.id }} | |
| name: 'built' | |
| - if: ${{ steps.dl.outputs.success == 'true' }} | |
| run: unzip built.zip | |
| - name: "Create orphan and push" | |
| if: ${{ steps.dl.outputs.success == 'true' }} | |
| run: | | |
| cd built/ | |
| git config --local user.email "[email protected]" | |
| git config --local user.name "GitHub Actions" | |
| CURR_HEAD=$(git rev-parse HEAD) | |
| git checkout --orphan md-outputs-PR-${NR} | |
| git add -A | |
| git commit -m "source commit: ${CURR_HEAD}" | |
| ls -A | grep -v '^.git$' | xargs -I _ rm -r '_' | |
| cd .. | |
| unzip -o -d built built.zip | |
| cd built | |
| git add -A | |
| git commit --allow-empty -m "differences for PR #${NR}" | |
| git push -u --force --set-upstream origin md-outputs-PR-${NR} | |
| # Comment on the Pull Request with a link to the branch and the diff | |
| comment-pr: | |
| name: "Comment on Pull Request" | |
| needs: [test-pr, create-branch] | |
| runs-on: ubuntu-latest | |
| if: ${{ needs.test-pr.outputs.is_valid == 'true' }} | |
| env: | |
| NR: ${{ needs.test-pr.outputs.number }} | |
| permissions: | |
| pull-requests: write | |
| steps: | |
| - name: 'Download comment artifact' | |
| id: dl | |
| uses: carpentries/actions/download-workflow-artifact@main | |
| with: | |
| run: ${{ github.event.workflow_run.id }} | |
| name: 'diff' | |
| - if: ${{ steps.dl.outputs.success == 'true' }} | |
| run: unzip ${{ github.workspace }}/diff.zip | |
| - name: "Comment on PR" | |
| id: comment-diff | |
| if: ${{ steps.dl.outputs.success == 'true' }} | |
| uses: carpentries/actions/comment-diff@main | |
| with: | |
| pr: ${{ env.NR }} | |
| path: ${{ github.workspace }}/diff.md | |
| # Comment if the PR is open and matches the SHA, but the workflow files have | |
| # changed | |
| comment-changed-workflow: | |
| name: "Comment if workflow files have changed" | |
| needs: test-pr | |
| runs-on: ubuntu-latest | |
| if: ${{ always() && needs.test-pr.outputs.is_valid == 'false' }} | |
| env: | |
| NR: ${{ github.event.workflow_run.pull_requests[0].number }} | |
| body: ${{ needs.test-pr.outputs.msg }} | |
| permissions: | |
| pull-requests: write | |
| steps: | |
| - name: 'Check for spoofing' | |
| id: dl | |
| uses: carpentries/actions/download-workflow-artifact@main | |
| with: | |
| run: ${{ github.event.workflow_run.id }} | |
| name: 'built' | |
| - name: 'Alert if spoofed' | |
| id: spoof | |
| if: ${{ steps.dl.outputs.success == 'true' }} | |
| run: | | |
| echo 'body<<EOF' >> $GITHUB_ENV | |
| echo '' >> $GITHUB_ENV | |
| echo '## :x: DANGER :x:' >> $GITHUB_ENV | |
| echo 'This pull request has modified workflows that created output. Close this now.' >> $GITHUB_ENV | |
| echo '' >> $GITHUB_ENV | |
| echo 'EOF' >> $GITHUB_ENV | |
| - name: "Comment on PR" | |
| id: comment-diff | |
| uses: carpentries/actions/comment-diff@main | |
| with: | |
| pr: ${{ env.NR }} | |
| body: ${{ env.body }} | |