bundle-size-pr.yml

name: Bundle size
on:
  pull_request:

env:
  NX_PARALLEL: 4

jobs:
  bundle-size:
    runs-on: ubuntu-latest
    if: ${{ github.repository_owner == 'microsoft' }}

    permissions:
      contents: 'read'
      actions: 'read'

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0

      - name: Derive appropriate SHAs for base and head for `nx affected` commands
        uses: nrwl/nx-set-shas@afb73a62d26e41464e9254689e1fd6122ee683c1 # v5.0.1

      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          cache: yarn
          node-version: '24'

      - run: yarn install --immutable

      - name: Measure affected packages
        run: yarn nx affected --target=bundle-size --nxBail

      - name: Compare results with "main" branch
        id: compare
        continue-on-error: true
        run: npx monosize compare-reports --branch main --output markdown --quiet > ./monosize.md

      - name: Save PR number
        run: echo ${{ github.event.number }} > pr.txt

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: monosize-report
          retention-days: 1
          if-no-files-found: error
          path: |
            monosize.md
            pr.txt

      - name: Fail if threshold exceeded
        if: steps.compare.outcome == 'failure'
        run: exit 1