/**
 * Use the Git CLI to fetch the previous version of the spec.  If the
 * previous does not exist or an error occurs fetching it, an empty
 * string is returned.
 *
 * @param baseDir Project repository base directory
 * @param specPath Path to spec file relative to `baseDir`
 */
export declare function previousSpecVersion(baseDir: string, specPath: string, sha: string): Promise<string>;
//# sourceMappingURL=previousSpecVersion.d.ts.map