Function getInstalledPythons

packages/python/src/version.ts:352–373

()

}

function getInstalledPythons(): Set<string> {
  if (installedPythonsCache !== null) {
    return installedPythonsCache;
  }

  if (process.env.VERCEL_BUILD_IMAGE) {
    installedPythonsCache = getInstalledPythonsFromFilesystem();
    return installedPythonsCache;
  }

  const uvPath = findUvInPath();
  if (!uvPath) {
    throw new NowBuildError({
      code: 'UV_ERROR',
      link: 'https://vercel.link/python-version',
      message: 'uv is required but was not found in PATH.',
    });
  }
  const uv = new UvRunner(uvPath);
  installedPythonsCache = uv.listInstalledPythons();
  return installedPythonsCache;
}

/**
 * Reset the installed Python versions cache.