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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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('system_cache'); | 5 #library('system_cache'); |
6 | 6 |
7 #import('io.dart'); | 7 #import('io.dart'); |
8 #import('package.dart'); | 8 #import('package.dart'); |
9 #import('source.dart'); | 9 #import('source.dart'); |
10 #import('source_registry.dart'); | 10 #import('source_registry.dart'); |
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52 | 52 |
53 /** | 53 /** |
54 * Ensures that the package identified by [id] is installed to the cache, | 54 * Ensures that the package identified by [id] is installed to the cache, |
55 * loads it, and returns it. | 55 * loads it, and returns it. |
56 * | 56 * |
57 * It is an error to try installing a package from a source with `shouldCache | 57 * It is an error to try installing a package from a source with `shouldCache |
58 * == false` to the system cache. | 58 * == false` to the system cache. |
59 */ | 59 */ |
60 Future<Package> install(PackageId id) { | 60 Future<Package> install(PackageId id) { |
61 if (!id.source.shouldCache) { | 61 if (!id.source.shouldCache) { |
62 throw new IllegalArgumentException("Package $id is not cacheable."); | 62 throw new ArgumentError("Package $id is not cacheable."); |
63 } | 63 } |
64 | 64 |
65 var pending = _pendingInstalls[id]; | 65 var pending = _pendingInstalls[id]; |
66 if (pending != null) return pending; | 66 if (pending != null) return pending; |
67 | 67 |
68 var future = id.source.installToSystemCache(id); | 68 var future = id.source.installToSystemCache(id); |
69 always(future, () => _pendingInstalls.remove(id)); | 69 always(future, () => _pendingInstalls.remove(id)); |
70 _pendingInstalls[id] = future; | 70 _pendingInstalls[id] = future; |
71 return future; | 71 return future; |
72 } | 72 } |
73 } | 73 } |
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