export declare function createDirIfNotExists(dir: string): void;
export declare function handleResponse({ success, message, data }?: {
    success?: boolean;
    message?: string;
    data?: {};
}): {
    success: boolean;
    data: {};
    message: string;
};
export declare function getRootDir(): any;
export declare function getProjectPkgJson(): any;
export declare function getPkgJson(): any;
/**
 * 判断端口是否可用
 * @param port 端口号
 * @returns Promise<void>
 */
export declare function isPortValid(port: number): Promise<boolean>;
/**
 * 获取可用的端口号
 * @param startPort 其实端口
 * @param maxTry 最大尝试次数
 * @returns Promise<number>
 */
export declare function getValidPort(startPort: number, maxTry?: number): Promise<number>;