/**
 * A client interface for interacting with the git command-line tool.
 */
export interface GitClient {
    /**
     * Returns the version string reported by git.
     *
     * @returns the output of `git version`.
     * @throws an error if git is not available.
     */
    version(): Promise<string>;
    /**
     * Returns the most recent tag reachable from HEAD in the given directory.
     * Equivalent to running `git -C <directory> describe --tags --abbrev=0`.
     *
     * @param directory the path to the git repository.
     * @returns the tag string.
     * @throws an error if no tag is found or git fails.
     */
    describeTag(directory: string): Promise<string>;
}