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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library barback.transformer; | 5 library barback.transformer.transformer; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 | 8 |
9 import 'asset_id.dart'; | 9 import '../asset/asset_id.dart'; |
| 10 import '../utils.dart'; |
10 import 'transform.dart'; | 11 import 'transform.dart'; |
11 import 'utils.dart'; | |
12 | 12 |
13 /// A [Transformer] represents a processor that takes in one or more input | 13 /// A [Transformer] represents a processor that takes in one or more input |
14 /// assets and uses them to generate one or more output assets. | 14 /// assets and uses them to generate one or more output assets. |
15 /// | 15 /// |
16 /// Dart2js, a SASS->CSS processor, a CSS spriter, and a tool to concatenate | 16 /// Dart2js, a SASS->CSS processor, a CSS spriter, and a tool to concatenate |
17 /// files are all examples of transformers. To define your own transformation | 17 /// files are all examples of transformers. To define your own transformation |
18 /// step, extend (or implement) this class. | 18 /// step, extend (or implement) this class. |
19 /// | 19 /// |
20 /// If possible, transformers should implement [DeclaringTransformer] as well to | 20 /// If possible, transformers should implement [DeclaringTransformer] as well to |
21 /// help barback optimize the package graph. | 21 /// help barback optimize the package graph. |
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84 /// In other words, a Transformer's job is to find all inputs for a | 84 /// In other words, a Transformer's job is to find all inputs for a |
85 /// transform, starting at the primary input, then generate all output assets | 85 /// transform, starting at the primary input, then generate all output assets |
86 /// and yield them back to the transform. | 86 /// and yield them back to the transform. |
87 /// | 87 /// |
88 /// If this does asynchronous work, it should return a [Future] that completes | 88 /// If this does asynchronous work, it should return a [Future] that completes |
89 /// once it's finished. | 89 /// once it's finished. |
90 apply(Transform transform); | 90 apply(Transform transform); |
91 | 91 |
92 String toString() => runtimeType.toString().replaceAll("Transformer", ""); | 92 String toString() => runtimeType.toString().replaceAll("Transformer", ""); |
93 } | 93 } |
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