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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.test.transformer.many_to_one; | 5 library barback.test.transformer.many_to_one; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 | 8 |
9 import 'package:barback/barback.dart'; | 9 import 'package:barback/barback.dart'; |
10 | 10 |
11 import 'mock.dart'; | 11 import 'mock.dart'; |
12 | 12 |
13 /// A transformer that uses the contents of a file to define the other inputs. | 13 /// A transformer that uses the contents of a file to define the other inputs. |
14 /// | 14 /// |
15 /// Outputs a file with the same name as the primary but with an "out" | 15 /// Outputs a file with the same name as the primary but with an "out" |
16 /// extension containing the concatenated contents of all non-primary inputs. | 16 /// extension containing the concatenated contents of all non-primary inputs. |
17 class ManyToOneTransformer extends MockTransformer { | 17 class ManyToOneTransformer extends MockTransformer { |
18 final String extension; | 18 final String extension; |
19 | 19 |
20 /// Creates a transformer that consumes assets with [extension]. | 20 /// Creates a transformer that consumes assets with [extension]. |
21 /// | 21 /// |
22 /// That file contains a comma-separated list of paths and it will input | 22 /// That file contains a comma-separated list of paths and it will input |
23 /// files at each of those paths. | 23 /// files at each of those paths. |
24 ManyToOneTransformer(this.extension); | 24 ManyToOneTransformer(this.extension); |
25 | 25 |
26 bool doIsPrimary(AssetId id) => id.extension == ".$extension"; | 26 bool doIsPrimary(AssetId id) => id.extension == ".$extension"; |
27 | 27 |
28 Future doApply(Transform transform) { | 28 Future doApply(Transform transform) async { |
29 return getPrimary(transform) | 29 var primary = await getPrimary(transform); |
30 .then((primary) => primary.readAsString()) | 30 var contents = await primary.readAsString(); |
31 .then((contents) { | 31 |
32 // Get all of the included inputs. | 32 // Get all of the included inputs. |
33 return Future.wait(contents.split(",").map((path) { | 33 var outputs = await Future.wait(contents.split(",").map((path) { |
34 var id; | 34 var id; |
35 if (path.contains("|")) { | 35 if (path.contains("|")) { |
36 id = new AssetId.parse(path); | 36 id = new AssetId.parse(path); |
37 } else { | 37 } else { |
38 id = new AssetId(transform.primaryInput.id.package, path); | 38 id = new AssetId(transform.primaryInput.id.package, path); |
39 } | 39 } |
40 return getInput(transform, id).then((input) => input.readAsString()); | 40 return getInput(transform, id).then((input) => input.readAsString()); |
41 })); | 41 })); |
42 }).then((outputs) { | 42 |
43 var id = transform.primaryInput.id.changeExtension(".out"); | 43 var id = transform.primaryInput.id.changeExtension(".out"); |
44 transform.addOutput(new Asset.fromString(id, outputs.join())); | 44 transform.addOutput(new Asset.fromString(id, outputs.join())); |
45 }); | |
46 } | 45 } |
47 | 46 |
48 String toString() => "many->1 $extension"; | 47 String toString() => "many->1 $extension"; |
49 } | 48 } |
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