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/**
* @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.io/license
*/
import { Path } from '@angular-devkit/core';
import { Tree, UpdateRecorder } from '@angular-devkit/schematics';
import { DirectoryEntry, FileSystem } from '../update-tool/file-system';
/**
* File system that leverages the virtual tree from the CLI devkit. This file
* system is commonly used by `ng update` migrations that run as part of the
* Angular CLI.
*/
export declare class DevkitFileSystem extends FileSystem {
private _tree;
private _updateRecorderCache;
constructor(_tree: Tree);
resolve(...segments: string[]): Path;
edit(filePath: Path): UpdateRecorder;
commitEdits(): void;
fileExists(filePath: Path): boolean;
directoryExists(dirPath: Path): boolean;
overwrite(filePath: Path, content: string): void;
create(filePath: Path, content: string): void;
delete(filePath: Path): void;
read(filePath: Path): string | null;
readDirectory(dirPath: Path): DirectoryEntry;
}