import { Logger } from './lib/Logger';
export declare class WebpackBuilder {
    webpack: any;
    entryCache: Set<string>;
    cache: boolean;
    servicePath: string;
    buildTmpDir: string;
    logger: Logger;
    constructor(config: {
        servicePath: string;
        buildTmpDir: string;
        logger: Logger;
        cache?: boolean;
    });
    /**
     *  Builds a webpack config into the build directory.
     */
    build(config: any): Promise<string[]>;
    /**
     *  Normalizes webpacks externals into an array of strings.
     *  This is fairly rough, could be better.
     *
     *  @return [ "moduleName" ]
     */
    private normalizeExternals;
    private runWebpack;
}