style_check_comment.yml

name: Style-Check-Comment

on:
  workflow_run:
    workflows:
      - Style-Check
    types:
      - completed

jobs:
  style_check_comment:
    name: Style-Check-Comment
    if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'failure' }}
    runs-on: ubuntu-22.04
    steps:
      # https://securitylab.github.com/research/github-actions-preventing-pwn-requests/
      - name: Download artifact
        uses: actions/github-script@v6
        with:
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: ${{ github.event.workflow_run.id }},
            });
            var prArtifact = artifacts.data.artifacts.filter((artifact) => artifact.name == "pr")[0];
            var download = await github.rest.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: prArtifact.id,
              archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{ github.workspace }}/pr.zip', Buffer.from(download.data));
            await github.rest.actions.deleteArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: prArtifact.id,
            });
      - run: unzip pr.zip
      - name: Comment
        uses: actions/github-script@v6
        with:
          script: |
            var fs = require('fs');
            var pr_number = Number(fs.readFileSync('./NR'));
            await github.rest.issues.createComment({
              issue_number: pr_number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: 'Style check found [formatting issues](https://github.com/'
                    + context.repo.owner + '/' + context.repo.repo + '/actions/runs/' + ${{ github.event.workflow_run.id }} + ')! '
                    + 'Comment `/format`, to automatically commit the suggested changes.'
            })