Function prepareCell

scripts/lighthouse-bundle-and-upload.mjs:86–126

* Build a single (mode) cell: * 1. Copy the app to a unique temp dir. * 2. Apply pnpm overrides (existing helper). * 3. Run `pnpm install` then `pnpm build: `. * 4. Tar the `dist/` output dir. * 5. Return cell metadata for the upload.

(mode, fieldName)

 *   5. Return cell metadata for the upload.
 */
async function prepareCell(mode, fieldName) {
  const tempApp = path.join(RUNNER_TEMP, `app-${APP}-${mode}`);
  await rm(tempApp, { recursive: true, force: true });

  // Copy app to temp (fixes file:/link: deps to workspace-absolute paths)
  execFileSync('yarn', ['ci:copy-to-temp', `./test-applications/${APP_DIR}`, tempApp], {
    cwd: E2E_DIR,
    stdio: 'inherit',
  });

  // Add pnpm overrides (workspace-absolute paths pointing at packed dir)
  execFileSync('yarn', ['ci:pnpm-overrides', tempApp, PACKED_DIR], {
    cwd: E2E_DIR,
    stdio: 'inherit',
  });

  // Install deps
  execFileSync('pnpm', ['install'], { cwd: tempApp, stdio: 'inherit' });

  // Build with the Vite mode — mode selection lives inside the per-mode npm
  // script, no extra env vars needed for routing. VITE_E2E_TEST_DSN is passed
  // so the tracing-replay build's Sentry.init has a DSN at build time.
  execFileSync('pnpm', [`build:${mode}`], {
    cwd: tempApp,
    stdio: 'inherit',
    env: {
      ...process.env,
      VITE_E2E_TEST_DSN: process.env.VITE_E2E_TEST_DSN ?? 'https://username@domain/123',
    },
  });

  const tarPath = path.join(RUNNER_TEMP, 'bundles', `${APP}-${mode}.tar.gz`);
  execFileSync('tar', ['-czf', tarPath, '-C', tempApp, STATIC_DIR], { stdio: 'inherit' });
  console.log(`Static bundle: ${tarPath} (${await formatSize(tarPath)})`);

  return {
    fieldName,
    tarPath,
    cell: { app: APP, mode, bundleField: fieldName, serve: 'static', staticDir: STATIC_DIR },
  };
}

/**
 * POST the multipart form. Returns the parsed 202 response body.