coverage-comment.yml

name: Post Coverage Comment
on:
  workflow_run:
    workflows: ["Build and Deploy Snapshot"]
    types: [completed]

permissions:
  pull-requests: write

jobs:
  post-comment:
    runs-on: ubuntu-24.04
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'success'
    steps:
    - name: Download PR comment artifact
      uses: dawidd6/action-download-artifact@v20
      with:
        workflow: main.yml
        run_id: ${{ github.event.workflow_run.id }}
        name: pr-coverage-comment
        path: pr-coverage-comment/
    - name: Post or update PR comment
      uses: actions/github-script@v9
      with:
        script: |
          const fs = require('fs');
          const prNumber = parseInt(
            fs.readFileSync('pr-coverage-comment/pr-number.txt', 'utf8').trim()
          );
          const commentBody = fs.readFileSync(
            'pr-coverage-comment/comment-body.txt', 'utf8'
          ).trim();

          const marker = '## :test_tube: Code Coverage Report';
          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.body.startsWith(marker));
          if (existing) {
            await github.rest.issues.updateComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              comment_id: existing.id,
              body: commentBody,
            });
          } else {
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              body: commentBody,
            });
          }