/// <reference types="node" />
import * as execa from 'execa';
import { Writable } from 'stream';
export { execa };
export declare function exec(command: string, options?: execa.Options): execa.ExecaChildProcess;
export declare function exec(commands: string[], options?: execa.Options): Promise<execa.ExecaReturns[]>;
export declare const spawn: execa.ExecaStatic;
export declare class ShellContext {
    private _cwdStack;
    private _env;
    logCommand: boolean;
    sleep: (ms: number) => Promise<void>;
    redirectLog?: boolean | string | Writable;
    readonly cwd: string;
    private readonly _logger;
    cd(dir: string): this;
    pushd(dir: string): this;
    popd(): this;
    exec(command: string, options?: execa.Options): execa.ExecaChildProcess;
    exec(commands: string[], options?: execa.Options): Promise<execa.ExecaReturns[]>;
    spawn(file: string, args?: string[], options?: execa.Options): execa.ExecaChildProcess;
    env(key: string): string | undefined;
    env(key: string, val: string | undefined): this;
    resetEnv(): this;
    private _getRedirectLogFile;
    private _logCmd;
}
export declare function shell(callback: (ctx: ShellContext) => Promise<any>): Promise<any>;