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| 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 |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 import 'package:barback/barback.dart'; |
| 6 import 'package:path/path.dart' as p; |
| 7 |
| 8 import 'dart:async'; |
| 9 |
| 10 class MakeBook extends AggregateTransformer { |
| 11 // All transformers need to implement "asPlugin" to let Pub know that they |
| 12 // are transformers. |
| 13 MakeBook.asPlugin(); |
| 14 |
| 15 // Implement the classifyPrimary method to claim any assets that you want |
| 16 // to handle. Return a value for the assets you want to handle, |
| 17 // or null for those that you do not want to handle. |
| 18 classifyPrimary(AssetId id) { |
| 19 |
| 20 // Only process assets where the filename ends with "recipe.html". |
| 21 if (!id.path.endsWith('recipe.html')) return null; |
| 22 |
| 23 // Return the path string, minus the recipe itself. |
| 24 // This is where the output asset will be written. |
| 25 return p.url.dirname(id.path); |
| 26 } |
| 27 |
| 28 // Implement the apply method to process the assets and create the |
| 29 // output asset. |
| 30 Future apply(AggregateTransform transform) async { |
| 31 var buffer = new StringBuffer()..write('<html><body>'); |
| 32 |
| 33 var assets = await transform.primaryInputs.toList(); |
| 34 assets.sort((x, y) => x.id.compareTo(y.id)); |
| 35 for (var asset in assets) { |
| 36 var content = await asset.readAsString(); |
| 37 buffer.write(content); |
| 38 buffer.write('<hr>'); |
| 39 } |
| 40 buffer.write('</body></html>'); |
| 41 // Write the output back to the same directory, |
| 42 // in a file named recipes.html. |
| 43 var id = new AssetId( |
| 44 transform.package, p.url.join(transform.key, "recipes.html")); |
| 45 transform.addOutput(new Asset.fromString(id, buffer.toString())); |
| 46 } |
| 47 } |
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Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master