import { Packager, InstallOptions, PruneOptions, AddOptions } from './packager-protocol';
export declare class Yarn implements Packager {
    get lockfileName(): string;
    get copyPackageSectionNames(): string[];
    get mustCopyModules(): boolean;
    getProdDependencies(depth: number, cwd?: string): Promise<{
        problems: never[];
        dependencies: any;
    }>;
    readLockfile(lockfilePath: string): Promise<string>;
    writeLockfile(lockfilePath: string, content: string): Promise<void>;
    rebaseLockfile(pathToPackageRoot: string, lockfile: string): string;
    install(opts?: InstallOptions, cwd?: string): Promise<any>;
    add(packages: string[], opts?: AddOptions, cwd?: string): Promise<any>;
    prune(opts?: PruneOptions, cwd?: string): Promise<any>;
    runScripts(scriptNames: string[], cwd?: string): Promise<any[]>;
}
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