/**
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 *
 * @format
 */
/// <reference types="node" />
/// <reference types="node" />
import FileRepository from './FileRepository';
export type HashOpts = {
    /**
     * What differences between files should we be insensitive to when generating
     * a hash? Defaults to line-ending insensitivity
     */
    insensitivity?: 'none' | 'line-ending' | 'whitespace';
};
/**
 * Creates a hash from content, attempting to normalize for line-feeds
 */
export declare class Hasher {
    private readonly hash;
    private readonly hashOpts;
    constructor(hashOpts?: HashOpts);
    feedContent(content: string | Buffer): Hasher;
    digest(): string;
}
/**
 * Convenience helper which hashes a single buffer
 */
export declare function hashContent(content: string | Buffer, opts?: HashOpts): string;
/**
 * Helper to hash a file/directory belonging to a repository
 */
export declare function hashFileOrDirectory(name: string, repo: FileRepository, opts?: HashOpts): Promise<string | null>;