| // Copyright 2013 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| library quiver.io; |
| |
| import 'dart:async'; |
| import 'dart:convert'; |
| import 'dart:io'; |
| |
| /// Converts a [Stream] of byte lists to a [String]. |
| Future<String> byteStreamToString(Stream<List<int>> stream, |
| {Encoding encoding: utf8}) { |
| return stream.transform(encoding.decoder).join(); |
| } |
| |
| /// Gets the full path of [path] by using [File.fullPathSync]. |
| String getFullPath(path) => new File(path).resolveSymbolicLinksSync(); |
| |
| /// Lists the sub-directories and files of this Directory, optionally recursing |
| /// into sub-directories based on the return value of [visit]. |
| /// |
| /// [visit] is called with a [File], [Directory] or [Link] to a directory, |
| /// never a Symlink to a File. If [visit] returns true, then its argument is |
| /// listed recursively. |
| Future visitDirectory(Directory dir, Future<bool> visit(FileSystemEntity f)) { |
| final completer = new Completer(); |
| final directories = <String, bool>{dir.path: false}; |
| |
| void _list(Directory dir) { |
| directories.putIfAbsent(dir.path, () => false); |
| dir.list(followLinks: false).listen((FileSystemEntity entity) { |
| var future = visit(entity); |
| if (future != null) { |
| future.then((bool recurse) { |
| // recurse on directories, but not cyclic symlinks |
| if (entity is! File && recurse == true) { |
| if (entity is Link) { |
| if (FileSystemEntity.typeSync(entity.path, followLinks: true) == |
| FileSystemEntityType.directory) { |
| var fullPath = getFullPath(entity.path).toString(); |
| var dirFullPath = getFullPath(dir.path).toString(); |
| if (!dirFullPath.startsWith(fullPath)) { |
| _list(new Directory(entity.path)); |
| } |
| } |
| } else { |
| _list(entity); |
| } |
| } |
| }); |
| } |
| }, onDone: () { |
| directories[dir.path] = true; |
| if (directories.values.every((v) => v)) { |
| completer.complete(); |
| } |
| }, onError: (e) { |
| completer.completeError(e); |
| }, cancelOnError: true); |
| } |
| |
| _list(dir); |
| |
| return completer.future; |
| } |