mastodon/.github/workflows/bundlesize-compare.yml

name: Compare JS bundle size
on:
  pull_request:
    paths:
      - 'app/javascript/**'
      - 'vite.config.mts'
      - 'package.json'
      - 'yarn.lock'
      - .github/workflows/bundlesize-compare.yml

jobs:
  build-head:
    name: 'Build head'
    runs-on: ubuntu-latest
    permissions:
      contents: read
    env:
      ANALYZE_BUNDLE_SIZE: '1'
    steps:
      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5

      - name: Set up Javascript environment
        uses: ./.github/actions/setup-javascript

      - name: Build
        run: yarn run build:production

      - name: Upload stats.json
        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
        with:
          name: head-stats
          path: ./stats.json
          if-no-files-found: error

  build-base:
    name: 'Build base'
    runs-on: ubuntu-latest
    permissions:
      contents: read
    env:
      ANALYZE_BUNDLE_SIZE: '1'
    steps:
      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
        with:
          ref: ${{ github.base_ref }}

      - name: Set up Javascript environment
        uses: ./.github/actions/setup-javascript

      - name: Build
        run: yarn run build:production

      - name: Upload stats.json
        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
        with:
          name: base-stats
          path: ./stats.json
          if-no-files-found: error

  compare:
    name: 'Compare base & head bundle sizes'
    runs-on: ubuntu-latest
    needs: [build-base, build-head]
    permissions:
      pull-requests: write
    steps:
      - uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5

      - uses: twk3/rollup-size-compare-action@5d3e409fcfe15d8ebb0edfe87e772c04b287f660 # v1.0.0
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          current-stats-json-path: ./head-stats/stats.json
          base-stats-json-path: ./base-stats/stats.json