bundle-size.yml

name: Bundle Size Check

on:
  pull_request:
    types:
      - opened
      - synchronize
      - reopened

jobs:
  bundle-size:
    name: Check Bundle Size
    runs-on: ubuntu-latest
    permissions:
      contents: read
      checks: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      - name: Set up pnpm
        uses: pnpm/action-setup@0e279bb959325dab635dd2c09392533439d90093 # v6.0.8
        with:
          version: 11.1.2

      - name: Set up Node.js
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run lint
        run: pnpm run lint

      - name: Run typecheck
        run: pnpm run typecheck

      - name: Run tests with coverage
        run: pnpm run test:ci

      - name: Publish test report
        uses: dorny/test-reporter@a43b3a5f7366b97d083190328d2c652e1a8b6aa2 # v3.0.0
        if: ${{ !cancelled() && github.event.pull_request.head.repo.full_name == github.repository && hashFiles('reports/vitest-junit.xml') != '' }}
        with:
          name: Vitest Tests
          path: reports/vitest-junit.xml
          reporter: java-junit
          fail-on-error: false

      - name: Add coverage summary
        if: ${{ !cancelled() && hashFiles('coverage/coverage-summary.json') != '' }}
        run: |
          node <<'EOF'
          const fs = require('node:fs');

          const summary = JSON.parse(fs.readFileSync('coverage/coverage-summary.json', 'utf8')).total;
          const metrics = ['lines', 'statements', 'functions', 'branches'];
          const rows = metrics.map((metric) => {
            const value = summary[metric];
            const label = metric.charAt(0).toUpperCase() + metric.slice(1);

            return `| ${label} | ${value.covered} | ${value.total} | ${value.pct}% |`;
          });

          fs.appendFileSync(process.env.GITHUB_STEP_SUMMARY, [
            '## Coverage Summary',
            '',
            '| Metric | Covered | Total | Percent |',
            '|---|---:|---:|---:|',
            ...rows,
            '',
          ].join('\n'));
          EOF

      - name: Build action bundle
        run: pnpm run build

      - name: Prepare comparison fixture
        run: |
          mkdir -p bundle-size-fixture
          printf 'module.exports = true;\n' > bundle-size-fixture/index.js

      # Run the bundle-size action that lives in this repository.
      # Because the action is defined here, we reference it with the
      # special `./` prefix so GitHub Actions resolves it locally.
      - name: Run Bundle Size Action
        uses: ./
        with:
          path: "bundle-size-fixture"
          package-name: "is-number"
          files: |
            index.js
          output-file: "bundle-size-comparison.json"