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| 1 // Copyright (c) 2015, 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 /// Transformer used for pub serve and pub build | |
| 6 library web_components.transformer; | |
| 7 | |
| 8 import 'package:barback/barback.dart'; | |
| 9 | |
| 10 export 'build/html_import_annotation_recorder.dart'; | |
| 11 import 'build/import_inliner.dart'; | |
| 12 export 'build/import_inliner.dart'; | |
| 13 import 'build/script_compactor.dart'; | |
| 14 export 'build/script_compactor.dart'; | |
| 15 import 'build/test_compatibility.dart'; | |
| 16 export 'build/test_compatibility.dart'; | |
| 17 import 'build/web_components.dart'; | |
| 18 export 'build/web_components.dart'; | |
| 19 | |
| 20 /// The Web Components transformer group, which internally runs several phases | |
| 21 /// that: | |
| 22 /// * Extract inlined script tags into separate files. | |
| 23 /// * Extract script tags from entry points and all html imports and add them | |
| 24 /// as dart imports in a new *.bootstrap.dart file. | |
| 25 /// * Run the `initialize` transformer. | |
| 26 /// * Inlines @HtmlImport annotations as html imports into the entry point. | |
| 27 /// * Inline imported html files and remove all but the main dart script tag. | |
| 28 /// | |
| 29 /// At the end of these phases, this tranformer produces a single entrypoint | |
| 30 /// HTML file with a single Dart script that can later be compiled with dart2js. | |
| 31 class WebComponentsTransformerGroup implements TransformerGroup { | |
| 32 final Iterable<Iterable> phases; | |
| 33 | |
| 34 WebComponentsTransformerGroup(TransformOptions options) | |
| 35 : phases = createDeployPhases(options); | |
| 36 | |
| 37 WebComponentsTransformerGroup.asPlugin(BarbackSettings settings) | |
| 38 : this(_parseSettings(settings)); | |
| 39 } | |
| 40 | |
| 41 /// Create deploy phases for web_components. | |
| 42 List<List<Transformer>> createDeployPhases(TransformOptions options, | |
| 43 {String sdkDir}) { | |
| 44 var phases = []; | |
| 45 | |
| 46 /// Must happen first, temporarily rewrites <link rel="x-dart-test"> tags to | |
| 47 /// <script type="application/dart" _was_test></script> tags. | |
| 48 phases.add([new RewriteXDartTestToScript(options.entryPoints)]); | |
| 49 | |
| 50 // Must happen before the WebComponents transformer, grabs all dart scripts | |
| 51 // and combines them into one bootstrap file. | |
| 52 phases.add([new ScriptCompactorTransformer(options.entryPoints)]); | |
| 53 | |
| 54 // Runs the customized version of the `initialize` transformer and inlines | |
| 55 // @HtmlImport annotations. | |
| 56 phases.add([new WebComponentsTransformer(options)]); | |
| 57 | |
| 58 // Inlines all html imports and removes all dart script tags in the process. | |
| 59 phases.add([new ImportInlinerTransformer(options.entryPoints)]); | |
| 60 | |
| 61 /// Must happen last, rewrites | |
| 62 /// <script type="application/dart" _was_test></script> tags to | |
| 63 /// <link rel="x-dart-test"> tags. | |
| 64 phases.add([new RewriteScriptToXDartTest(options.entryPoints)]); | |
| 65 return phases; | |
| 66 } | |
| 67 | |
| 68 /// Options used by web_components transformers | |
| 69 class TransformOptions { | |
| 70 /// List of entrypoints paths. The paths are relative to the package root and | |
| 71 /// are represented using posix style, which matches the representation used | |
| 72 /// in asset ids in barback. If null, any html file under 'web/' or 'test/' is | |
| 73 /// considered an entry point. | |
| 74 final List<String> entryPoints; | |
| 75 | |
| 76 /// Current Barback mode. | |
| 77 final bool releaseMode; | |
| 78 | |
| 79 TransformOptions(this.entryPoints, this.releaseMode); | |
| 80 | |
| 81 /// Whether an asset with [id] is an entry point HTML file. | |
| 82 bool isHtmlEntryPoint(AssetId id) { | |
| 83 if (id.extension != '.html') return false; | |
| 84 | |
| 85 // Note: [id.path] is a relative path from the root of a package. | |
| 86 if (entryPoints == null) { | |
| 87 return id.path.startsWith('web/') || id.path.startsWith('test/'); | |
| 88 } | |
| 89 | |
| 90 return entryPoints.contains(id.path); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 // Builds TransformOptions given some BarbackSettings | |
| 95 TransformOptions _parseSettings(BarbackSettings settings) { | |
| 96 var args = settings.configuration; | |
| 97 bool releaseMode = settings.mode == BarbackMode.RELEASE; | |
| 98 var entryPoints = readFileList(args['entry_points']); | |
| 99 return new TransformOptions(entryPoints, releaseMode); | |
| 100 } | |
| 101 | |
| 102 /// Reads a file list value from the [BarbackSettings] | |
| 103 /// TODO(jakemac): This should also move to code_transformers. | |
| 104 readFileList(value) { | |
| 105 if (value == null) return null; | |
| 106 var files = []; | |
| 107 bool error; | |
| 108 if (value is List) { | |
| 109 files = value; | |
| 110 error = value.any((e) => e is! String); | |
| 111 } else if (value is String) { | |
| 112 files = [value]; | |
| 113 error = false; | |
| 114 } else { | |
| 115 error = true; | |
| 116 } | |
| 117 if (error) { | |
| 118 print('Bad value for "entry_points" in the web_components transformer. ' | |
| 119 'Expected either one String or a list of Strings.'); | |
| 120 } | |
| 121 return files; | |
| 122 } | |
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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