/// <reference types="node" />
import { pipeline } from 'stream';
export declare const pipelineP: typeof pipeline.__promisify__;
/**
 * Integer division with remained.
 *
 * @param v Value.
 * @param d Divisor.
 * @return Integer divided and remained.
 */
export declare function divmod(v: number, d: number): number[];
/**
 * Parse date or return null is not valid.
 *
 * @param str Date string.
 * @return Date object or null.
 */
export declare function parseDate(str: string): Date | null;
/**
 * Get environment variable value.
 *
 * @param name Environment name.
 * @return String value or null.
 */
export declare function env(name: string): string | null;
/**
 * Check if the environment variable value is true.
 *
 * @param name Environment name.
 * @return String value is a true-like value.
 */
export declare function envTrue(name: string): boolean | "" | null;
/**
 * Stat path or return null if path does not exist.
 *
 * @param filepath File path.
 * @return Stat object or null.
 */
export declare function fstat(filepath: string): Promise<import("fs").Stats | null>;
/**
 * Read input file to list all URL's line by line.
 *
 * @param filepath Input file.
 * @return URL list.
 */
export declare function readInputFile(filepath: string): Promise<string[]>;
/**
 * Format date for human readable timestamps.
 *
 * @param date Date object or null.
 * @return Date string.
 */
export declare function dateHumanTimestamp(date?: Date | null): string;