/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
export type GitLineChangeMarker = 'N' | 'M' | 'D' | '░';
export interface GitLineChangeResult {
    /**
     * 1-based line number in the *working tree* file -> marker.
     *
     * Only includes lines that have a non-default marker (N/M/D). Lines not present in the map
     * should be treated as unchanged.
     */
    markersByLine: Map<number, Exclude<GitLineChangeMarker, '░'>>;
    /**
     * 1-based line numbers after which there is a deletion block (relative to HEAD).
     *
     * Special case: 0 means "before the first line" (deletions at file start).
     */
    deletionAfterLines: Set<number>;
    /**
     * When present, indicates why git changes could not be computed.
     */
    warning?: string;
}
/**
 * Computes per-line change markers for a file relative to HEAD.
 *
 * Notes:
 * - Uses `git diff HEAD --unified=0` to include both staged and unstaged changes.
 * - For files not in a git repo / git unavailable / errors: returns empty markers and a warning.
 */
export declare function getGitLineChanges(absolutePath: string): Promise<GitLineChangeResult>;