import { SourcePath } from '../common/types';
export declare const ensureFileExists: (filePath: string) => Promise<void>;
/**
 * Traverse up a file path and search for the given file name.  Always returns an absolute path.
 *
 * @param start File or folder path to start searching from
 * @param fileName File name to search for
 */
export declare function searchUp(start: SourcePath, fileName: string): string | undefined;