import type { LilypondVersion } from "../types/lilypondVersion.js";
export interface DownloadLilypondOptions {
    version: LilypondVersion;
    cacheDir?: string;
    fetchImpl?: typeof fetch;
    log?: (message: string) => void;
}
/**
 * Downloads, verifies, and extracts a prebuilt LilyPond release into the
 * cache dir, then returns the path to its `bin/lilypond[.exe]`. Returns
 * `undefined` when LilyPond publishes no prebuilt for the current
 * platform/arch. A previously-completed install for the same version is
 * reused as-is.
 */
export declare function downloadLilypond({ version, cacheDir, fetchImpl, log, }: DownloadLilypondOptions): Promise<string | undefined>;