screenshots.yml

name: Percy screenshots

on:
  workflow_call:
  workflow_dispatch:

concurrency:
  group: screenshots-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  screenshots:
    name: Send screenshots
    runs-on: ubuntu-22.04

    env:
      PERCY_POSTINSTALL_BROWSER: false
      PERCY_TOKEN: ${{ secrets.PERCY_TOKEN }}
      PUPPETEER_SKIP_DOWNLOAD: true

    # Skip when secrets are unavailable on forks
    if: ${{ !github.event.pull_request.head.repo.fork }}

    steps:
      - name: Check secrets
        if: ${{ !env.PERCY_TOKEN }}
        run: echo "::warning title=GitHub Actions secrets::Workflow requires 'PERCY_TOKEN' secret"

      - name: Checkout
        uses: actions/checkout@v4.2.2

      - name: Install dependencies
        uses: ./.github/workflows/actions/install-node

      - name: Cache browser download
        uses: actions/cache@v4.2.0
        with:
          # Use faster GNU tar for all runners
          enableCrossOsArchive: true
          key: puppeteer-${{ runner.os }}
          path: .cache/puppeteer

      - name: Build
        uses: ./.github/workflows/actions/build

      - name: Start review app
        run: npm start --workspace @govuk-frontend/review &

      - name: Send screenshots to Percy
        run: npx --workspace @govuk-frontend/review percy exec -- npm run test:screenshots