import { ExactPackage, LatestPackageTarget, PackageConfig } from "../install/package.js";
import { Resolver } from "../trace/resolver.js";
import { Install } from "../generator.js";
export declare function resolveBuiltin(specifier: string, env: string[]): string | Install | undefined;
export declare function pkgToUrl(pkg: ExactPackage): Promise<`${string}/`>;
export declare function getPackageConfig(this: Resolver, pkgUrl: string): Promise<PackageConfig | null | undefined>;
export declare function parseUrlPkg(url: string): {
    pkg: ExactPackage;
    subpath: `./${string}` | null;
    layer: string;
} | undefined;
export declare function resolveLatestTarget(this: Resolver, target: LatestPackageTarget, _layer: string, parentUrl: string): Promise<ExactPackage | null>;