import { Registry } from "./npm";
export interface IRegistryCollectionShards {
    sameCollection: Array<Registry>;
    differentCollection: Array<Registry>;
}
/**
 * Given an array of Registry objects, returns only those
 * which are unique and correspond to a VSTS feed.
 */
export declare function filterUniqueVstsRegistries(registries: Array<Registry>): Array<Registry>;
export declare function isInSameCollection(r: Registry): boolean;
/**
 * Given an array of Registry objects, splits them
 * by the collection their VSTS feed resides in. Only
 * splits by whether they are in the same collection
 * as the current job scope or a different one. This
 * depends on running inside of a VSTS agent context
 * as it depends on SYSTEM_TEAMFOUNDATIONCOLLECTIONURI.
 */
export declare function shardRegistriesByCollection(registries: Array<Registry>): IRegistryCollectionShards;
export declare function authenticateRegistries(...registries: Array<Registry>): Promise<Array<Registry>>;