import { LogLevels, NpmClientType } from '../types';
export interface UpgradePiralOptions {
    /**
     * The version of Piral to upgrade to.
     */
    version?: string;
    /**
     * The target Piral instance for upgrading. This is the root
     * directory of the app shell, i.e., where the package.json is
     * stored.
     */
    target?: string;
    /**
     * Sets the log level to use (1-5).
     */
    logLevel?: LogLevels;
    /**
     * Defines if the dependencies should be installed, too.
     * If the option is disabled, only the package.json is
     * modified, but nothing is installed yet.
     */
    install?: boolean;
    /**
     * Defines the used npm client. By default, "npm" is used
     * if no other client is autodetected. The autodetection
     * works against Lerna, pnpm, and Yarn.
     */
    npmClient?: NpmClientType;
}
export declare const upgradePiralDefaults: UpgradePiralOptions;
export declare function upgradePiral(baseDir?: string, options?: UpgradePiralOptions): Promise<void>;