| // Copyright (c) 2013, 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 barback.package_provider; |
| |
| import 'dart:async'; |
| |
| import 'asset.dart'; |
| import 'asset_id.dart'; |
| |
| /// API for locating and accessing packages on disk. |
| /// |
| /// Implemented by pub and provided to barback so that it isn't coupled |
| /// directly to pub. |
| abstract class PackageProvider { |
| /// The names of all packages that can be provided by this provider. |
| /// |
| /// This is equal to the transitive closure of the entrypoint package |
| /// dependencies. |
| Iterable<String> get packages; |
| |
| /// Loads an asset from disk. |
| /// |
| /// This should be re-entrant; it may be called multiple times with the same |
| /// id before the previously returned future has completed. |
| Future<Asset> getAsset(AssetId id); |
| } |