/// <reference types="node" />
import { EventEmitter } from 'events';
export declare class Engine<TProgress extends {
    [key: string]: Step;
}> extends EventEmitter {
    protected progress: TProgress;
    protected hasPrinted: boolean;
    protected hasFailed: boolean;
    printSteps(steps: {
        [key: string]: Step;
    }): void;
    protected exec(command: string): Promise<string>;
    protected get<TData = any>(url: string): Promise<TData>;
    protected createTemp(): Promise<string>;
    protected readJson<TData = any>(filename: string): Promise<TData>;
    protected updateProgress(step: keyof TProgress, status: Step['status'], reason?: string): void;
    protected failure(message: string): void;
    protected warning(message: string): void;
    protected notice(message: string): void;
    protected trace(message: string): void;
}
export declare type Step = {
    status: 'pass' | 'fail' | 'warn' | 'skipped' | 'pending' | 'working';
    title: string;
    reason?: string;
};