import { AbortableAsyncMapper } from '@naturalcycles/js-lib';
import { TransformMapOptions, TransformLogProgressOptions } from '../..';
export interface NDJSONMapOptions<IN = any, OUT = IN> extends TransformMapOptions<IN, OUT>, TransformLogProgressOptions<IN> {
    inputFilePath: string;
    outputFilePath: string;
    limitInput?: number;
    limitOutput?: number;
    /**
     * @default 100_000
     */
    logEveryOutput?: number;
    /**
     * Defaults to `true` for ndjsonMap
     *
     * @default true
     */
    flattenArrayOutput?: boolean;
}
/**
 * Unzips input file automatically, if it ends with `.gz`.
 * Zips output file automatically, if it ends with `.gz`.
 */
export declare function ndjsonMap<IN = any, OUT = any>(mapper: AbortableAsyncMapper<IN, OUT>, opt: NDJSONMapOptions<IN, OUT>): Promise<void>;