/**
 * @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
 */
/**
 * A `string` representing a specific type of path, with a particular brand `B`.
 *
 * A `string` is not assignable to a `BrandedPath`, but a `BrandedPath` is assignable to a `string`.
 * Two `BrandedPath`s with different brands are not mutually assignable.
 */
export type BrandedPath<B extends string> = string & {
    _brand: B;
};
/**
 * A fully qualified path in the file system, in POSIX form.
 */
export type AbsoluteFsPath = BrandedPath<'AbsoluteFsPath'>;
/**
 * A path that's relative to another (unspecified) root.
 *
 * This does not necessarily have to refer to a physical file.
 */
export type PathSegment = BrandedPath<'PathSegment'>;
/**
 * An abstraction over the path manipulation aspects of a file-system.
 */
export interface PathManipulation {
    extname(path: AbsoluteFsPath | PathSegment): string;
    isRoot(path: AbsoluteFsPath): boolean;
    isRooted(path: string): boolean;
    dirname<T extends PathString>(file: T): T;
    extname(path: AbsoluteFsPath | PathSegment): string;
    join<T extends PathString>(basePath: T, ...paths: string[]): T;
    /**
     * Compute the relative path between `from` and `to`.
     *
     * In file-systems that can have multiple file trees the returned path may not actually be
     * "relative" (i.e. `PathSegment`). For example, Windows can have multiple drives :
     * `relative('c:/a/b', 'd:/a/c')` would be `d:/a/c'.
     */
    relative<T extends PathString>(from: T, to: T): PathSegment | AbsoluteFsPath;
    basename(filePath: string, extension?: string): PathSegment;
    normalize<T extends PathString>(path: T): T;
    resolve(...paths: string[]): AbsoluteFsPath;
    pwd(): AbsoluteFsPath;
    chdir(path: AbsoluteFsPath): void;
}
/**
 * An abstraction over the read-only aspects of a file-system.
 */
export interface ReadonlyFileSystem extends PathManipulation {
    isCaseSensitive(): boolean;
    exists(path: AbsoluteFsPath): boolean;
    readFile(path: AbsoluteFsPath): string;
    readFileBuffer(path: AbsoluteFsPath): Uint8Array;
    readdir(path: AbsoluteFsPath): PathSegment[];
    lstat(path: AbsoluteFsPath): FileStats;
    stat(path: AbsoluteFsPath): FileStats;
    realpath(filePath: AbsoluteFsPath): AbsoluteFsPath;
    getDefaultLibLocation(): AbsoluteFsPath;
}
/**
 * A basic interface to abstract the underlying file-system.
 *
 * This makes it easier to provide mock file-systems in unit tests,
 * but also to create clever file-systems that have features such as caching.
 */
export interface FileSystem extends ReadonlyFileSystem {
    writeFile(path: AbsoluteFsPath, data: string | Uint8Array, exclusive?: boolean): void;
    removeFile(path: AbsoluteFsPath): void;
    symlink(target: AbsoluteFsPath, path: AbsoluteFsPath): void;
    copyFile(from: AbsoluteFsPath, to: AbsoluteFsPath): void;
    moveFile(from: AbsoluteFsPath, to: AbsoluteFsPath): void;
    ensureDir(path: AbsoluteFsPath): void;
    removeDeep(path: AbsoluteFsPath): void;
}
export type PathString = string | AbsoluteFsPath | PathSegment;
/**
 * Information about an object in the FileSystem.
 * This is analogous to the `fs.Stats` class in Node.js.
 */
export interface FileStats {
    isFile(): boolean;
    isDirectory(): boolean;
    isSymbolicLink(): boolean;
}
