import { type Dirent } from 'node:fs';
import { type Promisable } from 'type-fest';
/**
 * Test if the error is a NodeJS errno exception.
 *
 * @param error The value to check
 * @param code If specified, check if the code matches
 * @returns Whether or not the error is a NodeJS errno exception.
 */
export declare function isErrno(error: unknown, code?: string): error is NodeJS.ErrnoException;
/**
 * Read the content of a JSON or YAML file.
 *
 * @param path The path to the file to read.
 * @returns A tuple of the parsed content and the content as a string.
 */
export declare function readData<R>(path: URL | string): Promise<[R, string]>;
interface WriteDataOptions {
    /**
     * If false, don’t sort the object keys.
     */
    readonly sort?: boolean;
    /**
     * A comparison function to use for sorting keys.
     *
     * By default natural sorting will be used.
     */
    readonly compare?: ((a: string, b: string) => number) | null;
}
/**
 * Write data to a file serialized as JSON or YAML.
 *
 * If `prettier` is available, the content is also formatted.
 *
 * @param path The file path to write the data to.
 * @param data The data to write to the file.
 * @param options Additional options for processing the data.
 * @returns The formatted content.
 */
export declare function writeData(path: string, data: unknown, { compare, sort }?: WriteDataOptions): Promise<string>;
interface OpenDirSafeOptions {
    allowMissing?: boolean;
    recursive?: boolean;
}
/**
 * Read the contents of a directory.
 *
 * @param directory The path of the directory to open.
 * @param onFile A callback which will get called for every file. This will be called with the full
 *   file path as its first argument and its `Dirent` object as the second argument.
 * @param options Additional options.
 */
export declare function opendirSafe(directory: string, onFile: (fullpath: string, stat: Dirent) => Promisable<void>, options?: OpenDirSafeOptions): Promise<void>;
export {};