bundle-size-trusted.yaml

# This is the trusted counterpart of the Bundle size workflow.
# It generates a report and posts a comment on the PR.

name: Bundle size (trusted)

on:
  workflow_run:
    workflows: [Bundle size]
    types:
      - completed

permissions:
  pull-requests: write

jobs:
  print:
    name: Print the sizes
    runs-on: ubuntu-latest
    steps:
      - name: Download the sizes
        uses: actions/download-artifact@v4
        with:
          merge-multiple: true
          path: '.'
          github-token: ${{ secrets.GITHUB_TOKEN }}
          run-id: ${{ github.event.workflow_run.id }}

      - name: Create the report
        id: create-report
        uses: actions/github-script@v7
        with:
          result-encoding: string
          script: |
            function parseDuOutput(output) {
              return Object.fromEntries(output.trim().split('\n').map(line => {
                const [size, folderName] = line.split(/\s+/);
                const [_packages, packageName, _dist] = folderName.split('/');
                return [packageName, parseInt(size, 10)];
              }));
            }
            function formatSize(sizeInBytes) {
              if (sizeInBytes < 1000) {
                return `${sizeInBytes} B`;
              } else {
                const sizeInKb = sizeInBytes / 1000;
                return `${sizeInKb.toFixed(2)} KB`;
              }
            }
            const fs = require('fs');
            const sizes = parseDuOutput(fs.readFileSync(`sizes-${${{ toJson(github.base_ref) }}}.txt`, 'utf8'));
            const sizesPR = parseDuOutput(fs.readFileSync(`sizes-${${{ toJson(github.head_ref) }}}.txt`, 'utf8'));
            core.summary.addHeading('📊 Package size report', '3');
            core.summary.addTable([
              ['Package', 'Before', 'After'].map((data) => ({ data, header: true })),
              ...Object.keys(sizes).map((packageName) => {
                const size = sizes[packageName];
                const sizePR = sizesPR[packageName];
                return [packageName, formatSize(size), sizePR === size ? 'No change' : formatSize(sizePR)];
              }),
            ]);
            const report = core.summary.stringify();
            core.summary.write();
            return report;

      - name: Post the report to the PR
        uses: thollander/actions-comment-pull-request@24bffb9b452ba05a4f3f77933840a6a841d1b32b # v3.0.1
        with:
          message: ${{ steps.create-report.outputs.result }}
          pr-number: ${{ github.event.workflow_run.pull_requests.number }}
          comment-tag: bundle-size