Bot: Comment on the Pull Request #2
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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 }} | |