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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 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 | 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 library initialize.mirror_loader; | 4 library initialize.mirror_loader; |
5 | 5 |
6 import 'dart:collection' show Queue; | 6 import 'dart:collection' show Queue; |
7 import 'dart:mirrors'; | 7 import 'dart:mirrors'; |
8 import 'package:path/path.dart' as path; | 8 import 'package:path/path.dart' as path; |
9 import 'package:initialize/initialize.dart'; | 9 import 'package:initialize/initialize.dart'; |
10 | 10 |
11 final _root = currentMirrorSystem().isolate.rootLibrary; | |
12 | |
11 Queue<Function> loadInitializers( | 13 Queue<Function> loadInitializers( |
12 {List<Type> typeFilter, InitializerFilter customFilter}) { | 14 {List<Type> typeFilter, InitializerFilter customFilter}) { |
13 return new InitializationCrawler(typeFilter, customFilter).run(); | 15 return new InitializationCrawler(typeFilter, customFilter).run(); |
14 } | 16 } |
15 | 17 |
16 // Crawls a library and all its dependencies for `Initializer` annotations using | 18 // Crawls a library and all its dependencies for `Initializer` annotations using |
17 // mirrors | 19 // mirrors |
18 class InitializationCrawler { | 20 class InitializationCrawler { |
19 // Set of all visited annotations, keys are the declarations that were | 21 // Set of all visited annotations, keys are the declarations that were |
20 // annotated, values are the annotations that have been processed. | 22 // annotated, values are the annotations that have been processed. |
21 static final _annotationsFound = | 23 static final _annotationsFound = |
22 new Map<DeclarationMirror, Set<InstanceMirror>>(); | 24 new Map<DeclarationMirror, Set<InstanceMirror>>(); |
23 | 25 |
24 // If non-null, then only these annotations should be processed. | 26 // If non-null, then only these annotations should be processed. |
25 final List<Type> typeFilter; | 27 final List<Type> typeFilter; |
26 | 28 |
27 // If non-null, then only annotations which return true when passed to this | 29 // If non-null, then only annotations which return true when passed to this |
28 // function will be processed. | 30 // function will be processed. |
29 final InitializerFilter customFilter; | 31 final InitializerFilter customFilter; |
30 | 32 |
31 // The root library that we start parsing from. | 33 InitializationCrawler(this.typeFilter, this.customFilter); |
32 LibraryMirror _root; | |
33 | |
34 InitializationCrawler(this.typeFilter, this.customFilter, | |
35 {LibraryMirror root}) { | |
36 _root = root == null ? currentMirrorSystem().isolate.rootLibrary : root; | |
37 } | |
38 | 34 |
39 // The primary function in this class, invoke it to crawl and collect all the | 35 // The primary function in this class, invoke it to crawl and collect all the |
40 // annotations into a queue of init functions. | 36 // annotations into a queue of init functions. |
41 Queue<Function> run() => _readLibraryDeclarations(_root); | 37 Queue<Function> run() { |
38 var librariesSeen = new Set<LibraryMirror>(); | |
39 var queue = new Queue<Function>(); | |
40 | |
41 var libraries = currentMirrorSystem().libraries; | |
42 var nonDartOrPackageImports = new List.from(libraries.keys.where( | |
43 (uri) => uri.scheme != 'package' && uri.scheme != 'dart')); | |
44 | |
45 for (var import in nonDartOrPackageImports.reversed) { | |
46 // Always load the package: version of a library if available. | |
47 var libToRun; | |
48 if (_isHttpStylePackageUrl(import)) { | |
49 var packageUri = _packageUriFor(import); | |
50 libToRun = libraries[packageUri]; | |
51 } | |
52 if (libToRun == null) libToRun = libraries[import]; | |
53 | |
54 // Dartium creates an extra trampoline lib that loads the main dart script | |
55 // and breaks our ordering. | |
56 if (librariesSeen.contains(libToRun) || | |
57 libToRun.uri.toString().endsWith('\$trampoline')) { | |
Siggi Cherem (dart-lang)
2015/03/04 16:43:52
maybe it's enough to do
libToRun.uri.path.ends
jakemac
2015/03/04 16:49:49
good point switched to .path
| |
58 continue; | |
59 } | |
60 _readLibraryDeclarations(libToRun, librariesSeen, queue); | |
61 } | |
62 | |
63 return queue; | |
64 } | |
65 | |
66 /// Whether [uri] is an http URI that contains a 'packages' segment, and | |
67 /// therefore could be converted into a 'package:' URI. | |
68 bool _isHttpStylePackageUrl(Uri uri) { | |
69 var uriPath = uri.path; | |
70 return uri.scheme == _root.uri.scheme && | |
71 // Don't process cross-domain uris. | |
72 uri.authority == _root.uri.authority && | |
73 uriPath.endsWith('.dart') && | |
74 (uriPath.contains('/packages/') || uriPath.startsWith('packages/')); | |
75 } | |
76 | |
77 Uri _packageUriFor(Uri httpUri) { | |
78 var packagePath = httpUri.path.substring( | |
79 httpUri.path.lastIndexOf('packages/') + 'packages/'.length); | |
80 return Uri.parse('package:$packagePath'); | |
81 } | |
42 | 82 |
43 // Reads Initializer annotations on this library and all its dependencies in | 83 // Reads Initializer annotations on this library and all its dependencies in |
44 // post-order. | 84 // post-order. |
45 Queue<Function> _readLibraryDeclarations(LibraryMirror lib, | 85 Queue<Function> _readLibraryDeclarations(LibraryMirror lib, |
46 [Set<LibraryMirror> librariesSeen, Queue<Function> queue]) { | 86 Set<LibraryMirror> librariesSeen, Queue<Function> queue) { |
47 if (librariesSeen == null) librariesSeen = new Set<LibraryMirror>(); | |
48 if (queue == null) queue = new Queue<Function>(); | |
49 librariesSeen.add(lib); | 87 librariesSeen.add(lib); |
50 | 88 |
51 // First visit all our dependencies. | 89 // First visit all our dependencies. |
52 for (var dependency in _sortedLibraryDependencies(lib)) { | 90 for (var dependency in _sortedLibraryDependencies(lib)) { |
53 // Skip dart: imports, they never use this package. | 91 // Skip dart: imports, they never use this package. |
54 if (dependency.targetLibrary.uri.toString().startsWith('dart:')) continue; | 92 if (dependency.targetLibrary.uri.toString().startsWith('dart:')) continue; |
55 if (librariesSeen.contains(dependency.targetLibrary)) continue; | 93 if (librariesSeen.contains(dependency.targetLibrary)) continue; |
56 | 94 |
57 _readLibraryDeclarations(dependency.targetLibrary, librariesSeen, queue); | 95 _readLibraryDeclarations(dependency.targetLibrary, librariesSeen, queue); |
58 } | 96 } |
(...skipping 82 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
141 if (declaration.owner is! LibraryMirror) { | 179 if (declaration.owner is! LibraryMirror) { |
142 // TODO(jakemac): Support static class methods. | 180 // TODO(jakemac): Support static class methods. |
143 throw _TOP_LEVEL_FUNCTIONS_ONLY; | 181 throw _TOP_LEVEL_FUNCTIONS_ONLY; |
144 } | 182 } |
145 annotatedValue = (declaration.owner as ObjectMirror) | 183 annotatedValue = (declaration.owner as ObjectMirror) |
146 .getField(declaration.simpleName).reflectee; | 184 .getField(declaration.simpleName).reflectee; |
147 } else if (declaration is LibraryMirror) { | 185 } else if (declaration is LibraryMirror) { |
148 var package; | 186 var package; |
149 var filePath; | 187 var filePath; |
150 Uri uri = declaration.uri; | 188 Uri uri = declaration.uri; |
189 // Convert to a package style uri if possible. | |
190 if (_isHttpStylePackageUrl(uri)) { | |
191 uri = _packageUriFor(uri); | |
192 } | |
151 if (uri.scheme == 'file' || uri.scheme.startsWith('http')) { | 193 if (uri.scheme == 'file' || uri.scheme.startsWith('http')) { |
152 filePath = path.url.relative(uri.path, | 194 filePath = path.url.relative(uri.path, |
153 from: path.url.dirname(_root.uri.path)); | 195 from: path.url.dirname(_root.uri.path)); |
154 } else if (uri.scheme == 'package') { | 196 } else if (uri.scheme == 'package') { |
155 var segments = uri.pathSegments; | 197 var segments = uri.pathSegments; |
156 package = segments[0]; | 198 package = segments[0]; |
157 filePath = path.url.joinAll(segments.getRange(1, segments.length)); | 199 filePath = path.url.joinAll(segments.getRange(1, segments.length)); |
158 } else { | 200 } else { |
159 throw new UnsupportedError('Unsupported uri scheme ${uri.scheme} for ' | 201 throw new UnsupportedError('Unsupported uri scheme ${uri.scheme} for ' |
160 'library ${declaration}.'); | 202 'library ${declaration}.'); |
(...skipping 24 matching lines...) Expand all Loading... | |
185 return true; | 227 return true; |
186 } | 228 } |
187 } | 229 } |
188 | 230 |
189 final _TOP_LEVEL_FUNCTIONS_ONLY = new UnsupportedError( | 231 final _TOP_LEVEL_FUNCTIONS_ONLY = new UnsupportedError( |
190 'Only top level methods are supported for initializers'); | 232 'Only top level methods are supported for initializers'); |
191 | 233 |
192 final _UNSUPPORTED_DECLARATION = new UnsupportedError( | 234 final _UNSUPPORTED_DECLARATION = new UnsupportedError( |
193 'Initializers are only supported on libraries, classes, and top level ' | 235 'Initializers are only supported on libraries, classes, and top level ' |
194 'methods'); | 236 'methods'); |
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