/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
import { HashFormat, OutputHashing } from '../models/plugin-options';
/**
 * Delete an output directory, but error out if it's the root of the project because
 * that would remove the entire project and could be dangerous.
 */
export declare function deleteOutputDir(root: string, outputPath: string, preserveDirs?: string[]): Promise<void>;
export declare function getOutputHashFormat(outputHashing?: OutputHashing, length?: number): HashFormat;
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