export default function getCurrentPackageManager(
  // @ts-expect-error TS2322
  userAgent: string | null = process.env.npm_config_user_agent,
):
  | {
      name: string;
      version: string;
    }
  | null
  | undefined {
  if (!userAgent) {
    return undefined;
  }

  const pmSpec = userAgent.split(' ')[0];
  const separatorPos = pmSpec.lastIndexOf('/');
  const name = pmSpec.substring(0, separatorPos);
  return {
    name: name,
    version: pmSpec.substring(separatorPos + 1),
  };
}