import { TransformerPath } from '../types/runner';
/**
 * Filters out the list of file paths containing the given extension
 * @param files List of file paths
 * @param extensions Extensions of the file to filter out from the given list
 * @returns list of filtered files list
 */
export declare const filterFiles: (files: string[], extensions: string[]) => string[][];
/**
 * Returns the path to the transform file used by JSCodeshift
 * @param transformer Partial path to the transform file
 * @param ext Extension of the transform file
 */
export declare const getTransformFile: (transformer: TransformerPath, ext?: 'ts' | 'js') => string;
/**
 * Creates a directory in the OS temp directory where temporary files will be stored
 * @param prefix Prefix for the temp directory
 * @returns The path to the created temp directory
 */
export declare const initTempDir: (prefix: string) => Promise<string>;
/**
 * Saves data into a temporary file storage
 * @param data Data to be stored
 * @param dirPath Path to the temporary directory where a temp file will be created
 */
export declare const saveTempData: <T>(data: T, dirPath: string) => Promise<void>;
/**
 * Reads and returns the data from the temporary file storage
 * @param dirPath Path to temp directory
 * @param cleanup Should delete temp directory
 * @returns Data merged from all the files in the temp directory
 */
export declare const readTempData: <T>(dirPath: string, cleanup?: boolean) => Promise<T>;