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// 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);
}
}