/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict-local
 * @format
 * @oncall react_native
 */

/**
 * Determine whether we can run the dev server.
 *
 * Return values:
 * - `not_running`: The port is unoccupied.
 * - `matched_server_running`: The port is occupied by another instance of this
 *   dev server (matching the passed `projectRoot`).
 * - `port_taken`: The port is occupied by another process.
 * - `unknown`: An error was encountered; attempt server creation anyway.
 */
declare export default function isDevServerRunning(
  devServerUrl: string,
  projectRoot: string
): Promise<"not_running" | "matched_server_running" | "port_taken" | "unknown">;