| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'dart:io' as io show Directory, File, IOOverrides, Link; |
| |
| import 'package:flutter_migrate/src/base/file_system.dart'; |
| |
| /// An [IOOverrides] that can delegate to [FileSystem] implementation if provided. |
| /// |
| /// Does not override any of the socket facilities. |
| /// |
| /// Do not provide a [LocalFileSystem] as a delegate. Since internally this calls |
| /// out to `dart:io` classes, it will result in a stack overflow error as the |
| /// IOOverrides and LocalFileSystem call each other endlessly. |
| /// |
| /// The only safe delegate types are those that do not call out to `dart:io`, |
| /// like the [MemoryFileSystem]. |
| class FlutterIOOverrides extends io.IOOverrides { |
| FlutterIOOverrides({FileSystem? fileSystem}) |
| : _fileSystemDelegate = fileSystem; |
| |
| final FileSystem? _fileSystemDelegate; |
| |
| @override |
| io.Directory createDirectory(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.createDirectory(path); |
| } |
| return _fileSystemDelegate!.directory(path); |
| } |
| |
| @override |
| io.File createFile(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.createFile(path); |
| } |
| return _fileSystemDelegate!.file(path); |
| } |
| |
| @override |
| io.Link createLink(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.createLink(path); |
| } |
| return _fileSystemDelegate!.link(path); |
| } |
| |
| @override |
| Stream<FileSystemEvent> fsWatch(String path, int events, bool recursive) { |
| if (_fileSystemDelegate == null) { |
| return super.fsWatch(path, events, recursive); |
| } |
| return _fileSystemDelegate! |
| .file(path) |
| .watch(events: events, recursive: recursive); |
| } |
| |
| @override |
| bool fsWatchIsSupported() { |
| if (_fileSystemDelegate == null) { |
| return super.fsWatchIsSupported(); |
| } |
| return _fileSystemDelegate!.isWatchSupported; |
| } |
| |
| @override |
| Future<FileSystemEntityType> fseGetType(String path, bool followLinks) { |
| if (_fileSystemDelegate == null) { |
| return super.fseGetType(path, followLinks); |
| } |
| return _fileSystemDelegate!.type(path, followLinks: followLinks); |
| } |
| |
| @override |
| FileSystemEntityType fseGetTypeSync(String path, bool followLinks) { |
| if (_fileSystemDelegate == null) { |
| return super.fseGetTypeSync(path, followLinks); |
| } |
| return _fileSystemDelegate!.typeSync(path, followLinks: followLinks); |
| } |
| |
| @override |
| Future<bool> fseIdentical(String path1, String path2) { |
| if (_fileSystemDelegate == null) { |
| return super.fseIdentical(path1, path2); |
| } |
| return _fileSystemDelegate!.identical(path1, path2); |
| } |
| |
| @override |
| bool fseIdenticalSync(String path1, String path2) { |
| if (_fileSystemDelegate == null) { |
| return super.fseIdenticalSync(path1, path2); |
| } |
| return _fileSystemDelegate!.identicalSync(path1, path2); |
| } |
| |
| @override |
| io.Directory getCurrentDirectory() { |
| if (_fileSystemDelegate == null) { |
| return super.getCurrentDirectory(); |
| } |
| return _fileSystemDelegate!.currentDirectory; |
| } |
| |
| @override |
| io.Directory getSystemTempDirectory() { |
| if (_fileSystemDelegate == null) { |
| return super.getSystemTempDirectory(); |
| } |
| return _fileSystemDelegate!.systemTempDirectory; |
| } |
| |
| @override |
| void setCurrentDirectory(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.setCurrentDirectory(path); |
| } |
| _fileSystemDelegate!.currentDirectory = path; |
| } |
| |
| @override |
| Future<FileStat> stat(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.stat(path); |
| } |
| return _fileSystemDelegate!.stat(path); |
| } |
| |
| @override |
| FileStat statSync(String path) { |
| if (_fileSystemDelegate == null) { |
| return super.statSync(path); |
| } |
| return _fileSystemDelegate!.statSync(path); |
| } |
| } |