import * as Event from 'events';
import { type FSWatcher } from '@modern-js/utils';
import type { BabelOptions, IFinaleCompilerOptions } from './type';
export declare const BuildWatchEvent: {
    firstCompiler: string;
    compiling: string;
    watchingCompiler: string;
};
export declare class BuildWatchEmitter extends Event.EventEmitter {
    private _initFn;
    setInitFn(fn: (emitter: BuildWatchEmitter) => Promise<any> | any): void;
    watch(): Promise<FSWatcher | null>;
}
export declare const runBuildWatch: (option: IFinaleCompilerOptions, babelConfig: BabelOptions | undefined, emitter: BuildWatchEmitter) => Promise<FSWatcher>;
export declare const buildWatch: (option: IFinaleCompilerOptions, babelConfig?: BabelOptions) => BuildWatchEmitter;