| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library pub.excluding_transformer; |
| |
| import 'dart:async'; |
| |
| import 'package:barback/barback.dart'; |
| |
| /// Decorates an inner [Transformer] and handles including and excluding |
| /// primary inputs. |
| class ExcludingTransformer extends Transformer { |
| /// If [includes] or [excludes] is non-null, wraps [inner] in an |
| /// [ExcludingTransformer] that handles those. |
| /// |
| /// Otherwise, just returns [inner] unmodified. |
| static Transformer wrap(Transformer inner, Set<String> includes, |
| Set<String> excludes) { |
| if (includes == null && excludes == null) return inner; |
| |
| return new ExcludingTransformer._(inner, includes, excludes); |
| } |
| |
| final Transformer _inner; |
| |
| /// The set of asset paths which should be included. |
| /// |
| /// If `null`, all non-excluded assets are allowed. Otherwise, only included |
| /// assets are allowed. |
| final Set<String> _includes; |
| |
| /// The set of assets which should be excluded. |
| /// |
| /// Exclusions are applied after inclusions. |
| final Set<String> _excludes; |
| |
| ExcludingTransformer._(this._inner, this._includes, this._excludes); |
| |
| isPrimary(AssetId id) { |
| // TODO(rnystrom): Support globs in addition to paths. See #17093. |
| if (_includes != null) { |
| // If there are any includes, it must match one of them. |
| if (!_includes.contains(id.path)) return false; |
| } |
| |
| // It must not be excluded. |
| if (_excludes != null && _excludes.contains(id.path)) { |
| return false; |
| } |
| |
| return _inner.isPrimary(id); |
| } |
| |
| Future apply(Transform transform) => _inner.apply(transform); |
| |
| String toString() => _inner.toString(); |
| } |