ci: cache playwright dependencies (#4863)

.github/workflows/playwright.yaml

@@ -1,47 +1,61 @@
 name: Playwright Tests
 
-env:
-  pip-version: 24.2
-
 on:
   push:
     branches: [ main, playground ]
   pull_request:
     branches: [ main, playground ]
 jobs:
-  test:
+  e2e-test:
     timeout-minutes: 60
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./app
     steps:
       - uses: actions/checkout@v4
       - name: Install PNPM
-        uses: pnpm/action-setup@v3
+        uses: pnpm/action-setup@v4
         with:
-          version: 9.8.0
+          version: 9.12.0
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
           cache-dependency-path: ./app/pnpm-lock.yaml
           node-version: lts/*
-          cache: "pnpm"
+          cache: pnpm
       - name: Install dependencies
-        working-directory: ./app
         run: pnpm install --frozen-lockfile
+      - name: Get installed Playwright version
+        id: playwright-version
+        run: echo "PLAYWRIGHT_VERSION=$(pnpm list --json | jq -r '.[0].devDependencies["@playwright/test"].version')" >> $GITHUB_ENV
+      - name: Cache Playwright binaries
+        uses: actions/cache@v4
+        id: playwright-cache
+        with:
+          path: ~/.cache/ms-playwright
+          key: ${{ runner.os }}-playwright-${{ env.PLAYWRIGHT_VERSION }}-${{ hashFiles('app/playwright.config.ts') }}
       - name: Install Playwright Browsers
-        working-directory: ./app
+        if: steps.playwright-cache.outputs.cache-hit != 'true'
         run: pnpm exec playwright install --with-deps
+      - name: Install system dependencies for WebKit
+        # WebKit dependencies can't be cached and must always be installed
+        if: steps.playwright-cache.outputs.cache-hit == 'true'
+        run: pnpm exec playwright install-deps webkit
       - name: Build the app
-        working-directory: ./app
         run: pnpm run build
       - uses: actions/setup-python@v5
         with:
           python-version: 3.12
-      - name: Install Phoenix
-        run: |
-          python -m pip install --upgrade pip==${{ env.pip-version }}
-          pip install .
+      - uses: astral-sh/setup-uv@v3
+        with:
+          version: 0.4.18
+          enable-cache: true
+          cache-dependency-glob: "pyproject.toml"
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - run: uv pip install --system -q ../. uvloop
+      - run: uv pip list
       - name: Run Playwright tests
-        working-directory: ./app
         run: pnpm exec playwright test
       - uses: actions/upload-artifact@v4
         if: always()