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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, 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 /// Transformer that removes uses of mirrors from the polymer runtime, so that | 5 /// Transformer that removes uses of mirrors from the polymer runtime, so that |
6 /// deployed applications are thin and small. | 6 /// deployed applications are thin and small. |
7 library polymer.src.build.mirrors_remover; | 7 library polymer.src.build.mirrors_remover; |
8 | 8 |
9 import 'dart:async'; | 9 import 'dart:async'; |
10 import 'package:barback/barback.dart'; | 10 import 'package:barback/barback.dart'; |
11 | 11 |
12 /// Removes the code-initialization logic based on mirrors. | 12 /// Removes the code-initialization logic based on mirrors. |
13 class MirrorsRemover extends Transformer { | 13 class MirrorsRemover extends Transformer { |
14 MirrorsRemover.asPlugin(); | 14 MirrorsRemover.asPlugin(); |
15 | 15 |
16 /// Only apply to `lib/polymer.dart`. | 16 /// Only apply to `lib/polymer.dart`. |
17 Future<bool> isPrimary(Asset input) => new Future.value( | 17 Future<bool> isPrimary(Asset input) => new Future.value( |
18 input.id.package == 'polymer' && | 18 input.id.package == 'polymer' && |
19 input.id.path == 'lib/polymer.dart'); | 19 input.id.path == 'lib/polymer.dart'); |
20 | 20 |
21 Future apply(Transform transform) { | 21 Future apply(Transform transform) { |
22 var id = transform.primaryInput.id; | 22 var id = transform.primaryInput.id; |
23 return transform.primaryInput.readAsString().then((code) { | 23 return transform.primaryInput.readAsString().then((code) { |
24 // Note: this rewrite is highly-coupled with how polymer.dart is | 24 // Note: this rewrite is highly-coupled with how polymer.dart is |
25 // written. Make sure both are updated in sync. | 25 // written. Make sure both are updated in sync. |
26 var start = code.indexOf('@MirrorsUsed'); | 26 var start = code.indexOf('@MirrorsUsed('); |
27 if (start == -1) _error(); | 27 if (start == -1) _error(); |
28 var end = code.indexOf('show MirrorsUsed;', start); | 28 var end = code.indexOf('show MirrorsUsed;', start); |
29 if (end == -1) _error(); | 29 if (end == -1) _error(); |
| 30 end = code.indexOf('\n', end); |
30 var loaderImport = code.indexOf( | 31 var loaderImport = code.indexOf( |
31 "import 'src/mirror_loader.dart' as loader;", end); | 32 "import 'src/mirror_loader.dart' as loader;", end); |
32 if (loaderImport == -1) _error(); | 33 if (loaderImport == -1) _error(); |
33 var sb = new StringBuffer() | 34 var sb = new StringBuffer() |
34 ..write(code.substring(0, start)) | 35 ..write(code.substring(0, start)) |
35 ..write(code.susbtring(end) | 36 ..write(code.substring(end) |
36 .replaceAll('src/mirror_loader.dart', 'src/static_loader.dart')); | 37 .replaceAll('src/mirror_loader.dart', 'src/static_loader.dart')); |
37 | 38 |
38 transform.addOutput(new Asset.fromString(id, sb.toString())); | 39 transform.addOutput(new Asset.fromString(id, sb.toString())); |
39 }); | 40 }); |
40 } | 41 } |
41 } | 42 } |
42 | 43 |
43 /** Transformer phases which should be applied to the smoke package. */ | 44 /** Transformer phases which should be applied to the smoke package. */ |
44 List<List<Transformer>> get phasesForSmoke => | 45 List<List<Transformer>> get phasesForSmoke => |
45 [[new MirrorsRemover.asPlugin()]]; | 46 [[new MirrorsRemover.asPlugin()]]; |
46 | 47 |
47 _error() => throw new StateError("Couldn't remove imports to mirrors, maybe " | 48 _error() => throw new StateError("Couldn't remove imports to mirrors, maybe " |
48 "polymer.dart was modified, but mirrors_remover.dart wasn't."); | 49 "polymer.dart was modified, but mirrors_remover.dart wasn't."); |
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