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Side by Side Diff: pkg/code_transformers/lib/src/resolver_impl.dart

Issue 315813003: Support using a mock SDK with the resolver in code-transformers, and switch (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 6 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 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 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 code_transformer.src.resolver_impl; 5 library code_transformer.src.resolver_impl;
6 6
7 import 'dart:async'; 7 import 'dart:async';
8 import 'package:analyzer/analyzer.dart' show parseCompilationUnit; 8 import 'package:analyzer/analyzer.dart' show parseCompilationUnit;
9 import 'package:analyzer/src/generated/ast.dart' hide ConstantEvaluator; 9 import 'package:analyzer/src/generated/ast.dart' hide ConstantEvaluator;
10 import 'package:analyzer/src/generated/constant.dart' show ConstantEvaluator, 10 import 'package:analyzer/src/generated/constant.dart' show ConstantEvaluator,
11 EvaluationResult; 11 EvaluationResult;
12 import 'package:analyzer/src/generated/element.dart'; 12 import 'package:analyzer/src/generated/element.dart';
13 import 'package:analyzer/src/generated/engine.dart'; 13 import 'package:analyzer/src/generated/engine.dart';
14 import 'package:analyzer/src/generated/java_io.dart';
15 import 'package:analyzer/src/generated/sdk.dart' show DartSdk; 14 import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
16 import 'package:analyzer/src/generated/sdk_io.dart' show DirectoryBasedDartSdk;
17 import 'package:analyzer/src/generated/source.dart'; 15 import 'package:analyzer/src/generated/source.dart';
18 import 'package:barback/barback.dart'; 16 import 'package:barback/barback.dart';
19 import 'package:code_transformers/assets.dart'; 17 import 'package:code_transformers/assets.dart';
20 import 'package:path/path.dart' as native_path; 18 import 'package:path/path.dart' as native_path;
21 import 'package:source_maps/refactor.dart'; 19 import 'package:source_maps/refactor.dart';
22 import 'package:source_maps/span.dart' show SourceFile, Span; 20 import 'package:source_maps/span.dart' show SourceFile, Span;
23 21
24 import 'resolver.dart'; 22 import 'resolver.dart';
23 import 'dart_sdk.dart' show UriAnnotatedSource;
25 24
26 // We should always be using url paths here since it's always Dart/pub code. 25 // We should always be using url paths here since it's always Dart/pub code.
27 final path = native_path.url; 26 final path = native_path.url;
28 27
29 /// Resolves and updates an AST based on Barback-based assets. 28 /// Resolves and updates an AST based on Barback-based assets.
30 /// 29 ///
31 /// This also provides a handful of useful APIs for traversing and working 30 /// This also provides a handful of useful APIs for traversing and working
32 /// with the resolved AST. 31 /// with the resolved AST.
33 class ResolverImpl implements Resolver { 32 class ResolverImpl implements Resolver {
34 /// Cache of all asset sources currently referenced. 33 /// Cache of all asset sources currently referenced.
35 final Map<AssetId, _AssetBasedSource> sources = 34 final Map<AssetId, _AssetBasedSource> sources =
36 <AssetId, _AssetBasedSource>{}; 35 <AssetId, _AssetBasedSource>{};
37 36
38 final InternalAnalysisContext _context = 37 final InternalAnalysisContext _context =
39 AnalysisEngine.instance.createAnalysisContext(); 38 AnalysisEngine.instance.createAnalysisContext();
40 39
41 /// Transform for which this is currently updating, or null when not updating. 40 /// Transform for which this is currently updating, or null when not updating.
42 Transform _currentTransform; 41 Transform _currentTransform;
43 42
44 /// The currently resolved entry libraries, or null if nothing is resolved. 43 /// The currently resolved entry libraries, or null if nothing is resolved.
45 List<LibraryElement> _entryLibraries; 44 List<LibraryElement> _entryLibraries;
46 Set<LibraryElement> _libraries; 45 Set<LibraryElement> _libraries;
47 46
48 /// Future indicating when this resolver is done in the current phase. 47 /// Future indicating when this resolver is done in the current phase.
49 Future _lastPhaseComplete = new Future.value(); 48 Future _lastPhaseComplete = new Future.value();
50 49
51 /// Completer for wrapping up the current phase. 50 /// Completer for wrapping up the current phase.
52 Completer _currentPhaseComplete; 51 Completer _currentPhaseComplete;
53 52
54 /// Handler for all Dart SDK (dart:) sources. 53 /// Creates a resolver with a given [sdk] implementation for resolving
55 DirectoryBasedDartSdk _dartSdk; 54 /// `dart:*` imports.
56 55 ResolverImpl(DartSdk sdk, DartUriResolver dartUriResolver,
57 /// Creates a resolver, where [sdkDir] is the root directory of the Dart SDK, 56 {AnalysisOptions options}) {
58 /// for resolving `dart:*` imports.
59 ResolverImpl(String sdkDir, {AnalysisOptions options}) {
60 if (options == null) { 57 if (options == null) {
61 options = new AnalysisOptionsImpl() 58 options = new AnalysisOptionsImpl()
62 ..cacheSize = 256 // # of sources to cache ASTs for. 59 ..cacheSize = 256 // # of sources to cache ASTs for.
63 ..preserveComments = false 60 ..preserveComments = false
64 ..analyzeFunctionBodies = true; 61 ..analyzeFunctionBodies = true;
65 } 62 }
66 _context.analysisOptions = options; 63 _context.analysisOptions = options;
67 64 sdk.context.analysisOptions = options;
68 _dartSdk = new _DirectoryBasedDartSdkProxy(new JavaFile(sdkDir)); 65 _context.sourceFactory = new SourceFactory([dartUriResolver,
69 _dartSdk.context.analysisOptions = options;
70
71 _context.sourceFactory = new SourceFactory([
72 new DartUriResolverProxy(_dartSdk),
73 new _AssetUriResolver(this)]); 66 new _AssetUriResolver(this)]);
74 } 67 }
75 68
76 LibraryElement getLibrary(AssetId assetId) { 69 LibraryElement getLibrary(AssetId assetId) {
77 var source = sources[assetId]; 70 var source = sources[assetId];
78 return source == null ? null : _context.computeLibraryElement(source); 71 return source == null ? null : _context.computeLibraryElement(source);
79 } 72 }
80 73
81 Future<Resolver> resolve(Transform transform, [List<AssetId> entryPoints]) { 74 Future<Resolver> resolve(Transform transform, [List<AssetId> entryPoints]) {
82 // Can only have one resolve in progress at a time, so chain the current 75 // Can only have one resolve in progress at a time, so chain the current
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241 Uri getImportUri(LibraryElement lib, {AssetId from}) => 234 Uri getImportUri(LibraryElement lib, {AssetId from}) =>
242 _getSourceUri(lib, from: from); 235 _getSourceUri(lib, from: from);
243 236
244 237
245 /// Similar to getImportUri but will get the part URI for parts rather than 238 /// Similar to getImportUri but will get the part URI for parts rather than
246 /// the library URI. 239 /// the library URI.
247 Uri _getSourceUri(Element element, {AssetId from}) { 240 Uri _getSourceUri(Element element, {AssetId from}) {
248 var source = element.source; 241 var source = element.source;
249 if (source is _AssetBasedSource) { 242 if (source is _AssetBasedSource) {
250 return source.getSourceUri(from); 243 return source.getSourceUri(from);
251 } else if (source is _DartSourceProxy) { 244 } else if (source is UriAnnotatedSource) {
252 return source.uri; 245 return source.uri;
253 } 246 }
254 // Should not be able to encounter any other source types. 247 // Should not be able to encounter any other source types.
255 throw new StateError('Unable to resolve URI for ${source.runtimeType}'); 248 throw new StateError('Unable to resolve URI for ${source.runtimeType}');
256 } 249 }
257 250
258 AssetId getSourceAssetId(Element element) { 251 AssetId getSourceAssetId(Element element) {
259 var source = element.source; 252 var source = element.source;
260 if (source is _AssetBasedSource) return source.assetId; 253 if (source is _AssetBasedSource) return source.assetId;
261 return null; 254 return null;
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446 439
447 Source fromEncoding(UriKind kind, Uri uri) => 440 Source fromEncoding(UriKind kind, Uri uri) =>
448 throw new UnsupportedError('fromEncoding is not supported'); 441 throw new UnsupportedError('fromEncoding is not supported');
449 442
450 Uri restoreAbsolute(Source source) => 443 Uri restoreAbsolute(Source source) =>
451 throw new UnsupportedError('restoreAbsolute is not supported'); 444 throw new UnsupportedError('restoreAbsolute is not supported');
452 445
453 TransformLogger get logger => _resolver._currentTransform.logger; 446 TransformLogger get logger => _resolver._currentTransform.logger;
454 } 447 }
455 448
456
457 /// Dart SDK which wraps all Dart sources to ensure they are tracked with Uris.
458 ///
459 /// Just a simple wrapper to make it easy to make sure that all sources we
460 /// encounter are either _AssetBasedSource or _DartSourceProxy.
461 class _DirectoryBasedDartSdkProxy extends DirectoryBasedDartSdk {
462 _DirectoryBasedDartSdkProxy(JavaFile sdkDirectory) : super(sdkDirectory);
463
464 Source mapDartUri(String dartUri) =>
465 _DartSourceProxy.wrap(super.mapDartUri(dartUri), Uri.parse(dartUri));
466 }
467
468
469 /// Dart SDK resolver which wraps all Dart sources to ensure they are tracked
470 /// with URIs.
471 class DartUriResolverProxy implements DartUriResolver {
472 final DartUriResolver _proxy;
473 DartUriResolverProxy(DirectoryBasedDartSdk sdk) :
474 _proxy = new DartUriResolver(sdk);
475
476 Source resolveAbsolute(Uri uri) =>
477 _DartSourceProxy.wrap(_proxy.resolveAbsolute(uri), uri);
478
479 DartSdk get dartSdk => _proxy.dartSdk;
480
481 Source fromEncoding(UriKind kind, Uri uri) =>
482 throw new UnsupportedError('fromEncoding is not supported');
483
484 Uri restoreAbsolute(Source source) =>
485 throw new UnsupportedError('restoreAbsolute is not supported');
486 }
487
488 /// Source file for dart: sources which track the sources with dart: URIs.
489 ///
490 /// This is primarily to support [Resolver.getImportUri] for Dart SDK (dart:)
491 /// based libraries.
492 class _DartSourceProxy implements Source {
493
494 /// Absolute URI which this source can be imported from
495 final Uri uri;
496
497 /// Underlying source object.
498 final Source _proxy;
499
500 _DartSourceProxy(this._proxy, this.uri);
501
502 /// Ensures that [source] is a _DartSourceProxy.
503 static _DartSourceProxy wrap(Source source, Uri uri) {
504 if (source == null || source is _DartSourceProxy) return source;
505 return new _DartSourceProxy(source, uri);
506 }
507
508 Source resolveRelative(Uri relativeUri) {
509 // Assume that the type can be accessed via this URI, since these
510 // should only be parts for dart core files.
511 return wrap(_proxy.resolveRelative(relativeUri), uri);
512 }
513
514 bool exists() => _proxy.exists();
515
516 bool operator ==(Object other) =>
517 (other is _DartSourceProxy && _proxy == other._proxy);
518
519 int get hashCode => _proxy.hashCode;
520
521 TimestampedData<String> get contents => _proxy.contents;
522
523 String get encoding => _proxy.encoding;
524
525 String get fullName => _proxy.fullName;
526
527 int get modificationStamp => _proxy.modificationStamp;
528
529 String get shortName => _proxy.shortName;
530
531 UriKind get uriKind => _proxy.uriKind;
532
533 bool get isInSystemLibrary => _proxy.isInSystemLibrary;
534 }
535
536 /// Get an asset ID for a URL relative to another source asset. 449 /// Get an asset ID for a URL relative to another source asset.
537 AssetId _resolve(AssetId source, String url, TransformLogger logger, 450 AssetId _resolve(AssetId source, String url, TransformLogger logger,
538 Span span) { 451 Span span) {
539 if (url == null || url == '') return null; 452 if (url == null || url == '') return null;
540 var uri = Uri.parse(url); 453 var uri = Uri.parse(url);
541 454
542 // Workaround for dartbug.com/17156- pub transforms package: imports from 455 // Workaround for dartbug.com/17156- pub transforms package: imports from
543 // files of the transformers package to have absolute /packages/ URIs. 456 // files of the transformers package to have absolute /packages/ URIs.
544 if (uri.scheme == '' && path.isAbsolute(url) 457 if (uri.scheme == '' && path.isAbsolute(url)
545 && uri.pathSegments[0] == 'packages') { 458 && uri.pathSegments[0] == 'packages') {
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626 539
627 void apply(ChangeSet changeSet) { 540 void apply(ChangeSet changeSet) {
628 if (!source.updateContents(content)) return; 541 if (!source.updateContents(content)) return;
629 if (source._revision == 1 && source._contents != null) { 542 if (source._revision == 1 && source._contents != null) {
630 changeSet.addedSource(source); 543 changeSet.addedSource(source);
631 } else { 544 } else {
632 changeSet.changedSource(source); 545 changeSet.changedSource(source);
633 } 546 }
634 } 547 }
635 } 548 }
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