Function prepareCache

packages/python/src/index.ts:1327–1352

({
  repoRootPath,
  workPath,
})

export { startDevServer };

export const prepareCache: PrepareCache = async ({
  repoRootPath,
  workPath,
}) => {
  const root = repoRootPath || workPath;
  const ignore = ['**/*.pyc', '**/__pycache__/**'];

  // Prune pre-built wheels from the uv cache (source-built wheels are retained).
  const uvCacheDir = getUvCacheDir(workPath);
  try {
    const uvPath = findUvInPath();
    if (uvPath) {
      const uv = new UvRunner(uvPath, uvCacheDir);
      await uv.cachePrune();
    }
  } catch {
    // best-effort; don't fail the build
  }

  // Cache the uv package cache, the default venv, and any service-namespaced
  // venvs so that subsequent builds can skip dependency installation.
  return glob('**/.vercel/python/{.venv,services/*/.venv,cache/uv}/**', {
    cwd: root,
    ignore,
  });
};

export const shouldServe: ShouldServe = opts => {
  const framework = opts.config.framework;