function requirePlugin() {
  try {
    const path = require.resolve('@web/dev-server-esbuild', { paths: [__dirname, process.cwd()] });
    return require(path);
  } catch (error) {
    if (error.code === 'MODULE_NOT_FOUND') {
      throw new Error(
        'You need to add @web/dev-server-esbuild as a dependency of your project to use the esbuild flags.',
      );
    } else {
      throw error;
    }
  }
}

export function esbuildPlugin(target: string | string[]) {
  const pluginModule = requirePlugin();
  return pluginModule.esbuildPlugin({ target });
}