bloat-comment.yml

name: Bloat Comment

on:
  workflow_run:
    workflows: ["CI"]
    types: [completed]

jobs:
  comment:
    if: github.event.workflow_run.event == 'pull_request'
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Download comment data
        uses: actions/download-artifact@v7
        with:
          name: bloat-comment
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Post PR comment
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');

            const prNumber = parseInt(fs.readFileSync('pr-number.txt', 'utf8').trim());
            const body = fs.readFileSync('report.md', 'utf8').trim();

            if (!body) {
              console.log('Empty report, skipping comment.');
              return;
            }

            const marker = '## Size Report';
            const { data: comments } = await github.rest.issues.listComments({
              issue_number: prNumber,
              owner: context.repo.owner,
              repo: context.repo.repo,
            });
            const existing = comments.find(c => c.body.includes(marker));
            if (existing) {
              await github.rest.issues.updateComment({
                comment_id: existing.id,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body,
              });
            } else {
              await github.rest.issues.createComment({
                issue_number: prNumber,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body,
              });
            }