/**
 * Check for a valid lock file, if it exists and is within the lockTimeout
 * @param lockfile - path to the lock file
 * @param lockTimeout - time in seconds that the lock file is valid
 * @returns boolean
 */
export declare function checkForValidLockFile(lockfile: string, lockTimeout: number | string): Promise<boolean>;
/**
 * Create a lock file
 * @param lockfile - path to the lock file
 */
export declare function createLockFile(lockfile: string): Promise<void>;
/**
 * Remove a lock file
 * @param lockfile - path to the lock file
 */
export declare function removeLockFile(lockfile: string): Promise<void>;