/**
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import * as fs from 'fs';
import * as ncp from 'ncp';
export declare const readFilep: typeof fs.readFile.__promisify__;
export declare const ncpp: (source: string, destination: string, options?: ncp.Options) => Promise<void>;
export interface Bag<T> {
    [script: string]: T;
}
export interface DefaultPackage extends Bag<string> {
    gts: string;
    typescript: string;
    '@types/node': string;
}
export declare function readJsonp(jsonPath: string): Promise<any>;
export interface ReadFileP {
    (path: string, encoding: string): Promise<string>;
}
export declare function nop(): void;
/**
 * An interface containing the top level data fields present in Config Files
 */
export interface ConfigFile {
    files?: string[];
    compilerOptions?: {};
    include?: string[];
    exclude?: string[];
    extends?: string[];
}
/**
 * Automatically defines npm or yarn is going to be used:
 * - If only yarn.lock exists, use yarn
 * - If only package-lock.json or both exist, use npm
 */
export declare function isYarnUsed(existsSync?: typeof fs.existsSync): boolean;
export declare function getPkgManagerCommand(isYarnUsed?: boolean): string;
/**
 * Find the tsconfig.json, read it, and return parsed contents.
 * @param rootDir Directory where the tsconfig.json should be found.
 * If the tsconfig.json file has an "extends" field hop down the dependency tree
 * until it ends or a circular reference is found in which case an error will be
 * thrown
 */
export declare function getTSConfig(rootDir: string, customReadFilep?: ReadFileP): Promise<ConfigFile>;