import { AbstractSource } from "./abstract-source";
/**
 * @export
 * @class NPM
 * @implements {Source}
 */
export declare class NPM extends AbstractSource {
    constructor(paths: {
        data: string;
        temp: string;
    });
    /**
     * @param {string} value
     * @param version
     * @returns {Promise<boolean>}
     * @memberof NPM
     */
    exists(value: string, version?: string): Promise<boolean>;
    /**
     * @param {string} value
     * @returns {Promise<void>}
     * @memberof NPM
     */
    update(value: string): Promise<void>;
    protected preparePackage(value: string, version?: string): Promise<void>;
    /**
     * @private
     * @param {string} value
     * @returns {Promise<{ name: string; tarball: string }>}
     * @memberof NPM
     */
    private getPackage;
    /**
     * @private
     * @param {string} source
     * @param {string} dest
     * @returns {Promise<void>}
     * @memberof NPM
     */
    private downloadPackage;
    /**
     * @private
     * @param {string} name
     * @param {string} file
     * @returns {Promise<void>}
     * @memberof NPM
     */
    private extractPackage;
}
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