/// <reference types="node" />
import { SpawnSyncOptions } from 'child_process';
export declare function downloadUrl(url: string, file: string): Promise<void>;
export declare function hash(filePath: string): Promise<string>;
export declare function plusx(file: string): Promise<void>;
export declare function spawn(
  command: string,
  args?: ReadonlyArray<string>,
  options?: SpawnSyncOptions
): Promise<void>;
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