import type { CacheDirOptions, DiskCacheOptions } from "../types";
export declare const detectCIEnv: () => boolean;
export declare const hashLockfile: (root?: string) => string;
export declare const resolveCacheDir: (options?: CacheDirOptions) => string;
export declare const pruneBackups: (cacheDir: string, options?: {
    keep?: number;
    maxAgeMs?: number;
}) => void;
export declare class DiskCache<V> {
    private readonly filePath;
    private readonly ttl;
    private readonly version;
    private readonly maxEntries;
    private readonly enabled;
    private data;
    constructor(namespace: string, options: DiskCacheOptions);
    private empty;
    private load;
    private flush;
    private isExpired;
    get(key: string): V | undefined;
    set(key: string, value: V): void;
    has(key: string): boolean;
    delete(key: string): void;
    clear(): void;
    prune(): number;
}