import type { RParseRequestFromFile } from '../r-bridge/retriever';
/**
 * Represents a table, identified by a header and a list of rows.
 */
export interface Table {
    header: string[];
    rows: string[][];
}
/**
 * Retrieves all files in the given directory recursively
 * @param dir    - Directory path to start the search from
 * @param suffix - Suffix of the files to be retrieved
 * Based on {@link https://stackoverflow.com/a/45130990}
 */
export declare function getAllFiles(dir: string, suffix?: RegExp): AsyncGenerator<string>;
/**
 * Retrieves all R files in a given directory (asynchronously)
 *
 *
 * @param input - directory-path to start the search from, can be a file as well. Will just return the file then.
 * @param limit - limit the number of files to be retrieved
 *
 * @returns Number of files processed (normally &le; `limit`, is &ge; `limit` if limit was reached).
 *          Will be `1`, if `input` is an R file (and `0` if it isn't).
 *
 * @see getAllFiles
 */
export declare function allRFiles(input: string, limit?: number): AsyncGenerator<RParseRequestFromFile, number>;
/**
 * Retrieves all R files in a given set of directories and files (asynchronously)
 *
 * @param inputs - Files or directories to validate for R-files
 * @param limit  - Limit the number of files to be retrieved
 * @returns Number of files processed (&le; limit)
 *
 * @see allRFiles
 */
export declare function allRFilesFrom(inputs: string[], limit?: number): AsyncGenerator<RParseRequestFromFile, number>;
export declare function writeTableAsCsv(table: Table, file: string, sep?: string, newline?: string): void;
/**
 * Reads a file line by line and calls the given function for each line.
 * The `lineNumber` starts at `0`.
 *
 * See {@link readLineByLineSync} for a synchronous version.
 */
export declare function readLineByLine(filePath: string, onLine: (line: Buffer, lineNumber: number) => Promise<void>): Promise<void>;
/**
 * Reads a file line by line and calls the given function for each line.
 * The `lineNumber` starts at `0`.
 *
 * See {@link readLineByLine} for an asynchronous version.
 */
export declare function readLineByLineSync(filePath: string, onLine: (line: Buffer, lineNumber: number) => void): void;
/**
 * Chops off the last part of the given directory path after a path separator, essentially returning the path's parent directory.
 * If an absolute path is passed, the returned path is also absolute.
 * @param directory - The directory whose parent to return
 */
export declare function getParentDirectory(directory: string): string;