/**
 * Check if a directory exists.
 */
export declare function dirExists(dir: string): boolean;
/**
 * Check if a file exists.
 */
export declare function fileExists(file: string): boolean;
/**
 * Create a directory, only if it doesn't exist yet.
 * Throws an error if the directory already exists, or encounters a filesystem problem.
 */
export declare function createDirSafely(dir: string): string;
/**
 * Create a file, only if it doesn't exist yet.
 * Throws an error if the file already exists, or encounters a filesystem problem.
 */
export declare function createFileSafely(file: string, data: string, overwrite?: boolean): string;
/**
 * Create an Actionhero LinkFile, only if it doesn't exist yet.
 * Throws an error if the file already exists, or encounters a filesystem problem.
 */
export declare function createLinkfileSafely(filePath: string, type: string): string;
/**
 * Remove an Actionhero LinkFile, only if it exists.
 * Throws an error if the file does not exist, or encounters a filesystem problem.
 */
export declare function removeLinkfileSafely(filePath: string): string;
/**
 * Create a system symbolic link.
 * Throws an error if it encounters a filesystem problem.
 */
export declare function createSymlinkSafely(destination: string, source: string): string;