import * as tar from 'tar';
export type ExtractOptions = Omit<tar.TarOptionsWithAliasesAsyncNoFile, 'file' | 'cwd'>;
export interface ExtractResult {
    /**
     * When `'hit'`, the data was already present in cache and was returned from
     * cache.
     *
     * When `'miss'`, the data was extracted into the cache and returned from
     * cache.
     *
     * When `undefined`, the cache is not enabled.
     */
    readonly cache?: 'hit' | 'miss';
}
/**
 * Extracts the content of a tarball, possibly caching it on disk.
 *
 * @param file     is the path to the tarball to be extracted.
 * @param options  are options to pass to `tar.extract`
 * @param comments are included in the cache key, when caching is enabled.
 *
 * @returns the result of the extraction.
 */
export declare function extract(file: string, outDir: string, options: ExtractOptions, ...comments: readonly string[]): ExtractResult;
/** @internal */
export declare function getPackageCacheEnabled(): boolean;
/** @internal */
export declare function setPackageCacheEnabled(value: boolean): void;
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