/** Named by its own `package/package.json`, never by the file name. */
export type PackedEntry = {
    name: string;
    path: string;
    version: string;
};
export declare const fileFromTarballBytes: (bytes: Buffer, member: string) => string | undefined;
export declare const isRegistryDir: (value: string) => boolean;
export declare const packedCatalogueIn: (dir: string) => Map<string, PackedEntry>;
export declare const versionInTarball: (path: string) => string | undefined;
export declare const fileInPacked: (entry: PackedEntry, member: string) => string | undefined;
export declare const tarballUrlOf: (registry: string, name: string, version: string) => string;
/** For a dry run, which has installed nothing for `node_modules` to hold. */
export declare const changelogFromRegistry: ({ name, registry, timeoutMs, version }: {
    name: string;
    registry: string;
    timeoutMs?: number;
    version: string;
}) => Promise<string | undefined>;
export type FromRegistry = {
    kind: 'file';
    text: string;
} | {
    kind: 'none';
} | {
    kind: 'unreachable';
    why: string;
};
export declare const fileFromRegistry: ({ member, name, registry, timeoutMs, version }: {
    member: string;
    name: string;
    registry: string;
    timeoutMs?: number;
    version: string;
}) => Promise<FromRegistry>;