.github/workflows/post_summaries.yaml

name: Comment on the pull request

on:
  # Trigger this workflow after the Health workflow completes. This workflow will have permissions to
  # do things like create comments on the PR, even if the original workflow couldn't.
  workflow_call:
  workflow_run:
    workflows:
      - Publish:Internal
      - Health:Internal
    types:
      - completed

jobs:
  upload:
    permissions:
      pull-requests: write
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request'
    continue-on-error: true
    steps:

      # Download the output of the health workflow, consisting of the comment markdown and either
      # the issue number or an existing comment ID.
      - name: 'Download artifact'
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: ${{ github.event.workflow_run.id }},
            });
            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "output"
            })[0];
            var download = await github.rest.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: matchArtifact.id,
              archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{ github.workspace }}/comment.zip', Buffer.from(download.data));
      - run: unzip comment.zip


      # Create the comment, or update the existing one, with the markdown
      # generated in the Health workflow.
      - name: 'Comment on PR'
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            var fs = require('fs');
            if (fs.existsSync('./comment.md')) {
              var markdown = fs.readFileSync('./comment.md', 'utf8');
              if (fs.existsSync('./commentId')) {
                var comment_number = Number(fs.readFileSync('./commentId', 'utf8'));
            
                await github.rest.issues.updateComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  comment_id: comment_number,
                  body: markdown
                });
              } else {
                var issue_number = Number(fs.readFileSync('./issueNumber', 'utf8'));
            
                await github.rest.issues.createComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: issue_number,
                  body: markdown
                });
              }
            } else if (fs.existsSync('./commentId')) {
              var comment_number = Number(fs.readFileSync('./commentId', 'utf8'));
            
              await github.rest.issues.deleteComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: comment_number,
              });
            }