Use different SDKs based on option settings

pkg/analysis_server/lib/src/analysis_server.dart

 // Copyright (c) 2014, 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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:core' hide Resource;
 import 'dart:math' show max;
 
-import 'package:analysis_server/plugin/protocol/protocol.dart' hide Element;
+import 'package:analysis_server/plugin/protocol/protocol.dart'
+    hide AnalysisOptions, Element;
 import 'package:analysis_server/src/analysis_logger.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analysis_server/src/operation/operation_queue.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/services/correction/namespace.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 110 matching lines @@
    */
   bool statusAnalyzing = false;
 
   /**
    * A list of the request handlers used to handle the requests sent to this
    * server.
    */
   List<RequestHandler> handlers;
 
   /**
-   * The current default [DartSdk].
+   * The function used to create a new SDK using the default SDK.
    */
-  final DartSdk defaultSdk;
+  final SdkCreator defaultSdkCreator;
+
+  /**
+   * The object used to manage the SDK's known to this server.
+   */
+  DartSdkManager sdkManager;
 
   /**
    * The instrumentation service that is to be used by this analysis server.
    */
   final InstrumentationService instrumentationService;
 
   /**
    * A table mapping [Folder]s to the [AnalysisContext]s associated with them.
    */
   final Map<Folder, AnalysisContext> folderMap =
@@ skipping 137 matching lines @@
    * exceptions to show up in unit tests, but it should be set to false when
    * running a full analysis server.
    */
   AnalysisServer(
       this.channel,
       this.resourceProvider,
       PubPackageMapProvider packageMapProvider,
       Index _index,
       this.serverPlugin,
       this.options,
-      this.defaultSdk,
+      this.defaultSdkCreator,
       this.instrumentationService,
       {ResolverProvider packageResolverProvider: null,
       EmbeddedResolverProvider embeddedResolverProvider: null,
       this.rethrowExceptions: true})
       : index = _index,
         searchEngine = _index != null ? createSearchEngine(_index) : null {
     _performance = performanceDuringStartup;
     operationQueue = new ServerOperationQueue();
     contextManager = new ContextManagerImpl(
         resourceProvider,
@@ skipping 21 matching lines @@
       onAnalysisComplete.then((_) {
         performanceAfterStartup = new ServerPerformance();
         _performance = performanceAfterStartup;
       });
     });
     Notification notification =
         new ServerConnectedParams(VERSION).toNotification();
     channel.sendNotification(notification);
     channel.listen(handleRequest, onDone: done, onError: error);
     handlers = serverPlugin.createDomains(this);
+    sdkManager = new DartSdkManager(defaultSdkCreator);
   }
 
   /**
    * The [Future] that completes when analysis is complete.
    */
   Future get onAnalysisComplete {
     if (isAnalysisComplete()) {
       return new Future.value();
     }
     if (_onAnalysisCompleteCompleter == null) {
@@ skipping 65 matching lines @@
    * notify interested parties that the file has been (at least partially)
    * analyzed.
    */
   void fileAnalyzed(ChangeNotice notice) {
     if (contextManager.isInAnalysisRoot(notice.source.fullName)) {
       _onFileAnalyzedController.add(notice);
     }
   }
 
   /**
+   * Return one of the SDKs that has been created, or `null` if no SDKs have
+   * been created yet.
+   */
+  DartSdk findSdk() {
+    DartSdk sdk = sdkManager.anySdk;
+    if (sdk != null) {
+      return sdk;
+    }
+    // TODO(brianwilkerson) Should we create an SDK using the default options?
+    return null;
+  }
+
+  /**
    * Return the preferred [AnalysisContext] for analyzing the given [path].
    * This will be the context that explicitly contains the path, if any such
    * context exists, otherwise it will be the first analysis context that
    * implicitly analyzes it.  Return `null` if no context is analyzing the
    * path.
    */
   AnalysisContext getAnalysisContext(String path) {
     return getContextSourcePair(path).context;
   }
 
@@ skipping 63 matching lines @@
    * a `null` context and a `file` [Source] is returned.
    *
    * If the [path] doesn't represent a file, a [ContextSourcePair] with a `null`
    * context and `null` [Source] is returned.
    *
    * Does not return `null`.
    */
   ContextSourcePair getContextSourcePair(String path) {
     // try SDK
     {
-      Uri uri = resourceProvider.pathContext.toUri(path);
-      Source sdkSource = defaultSdk.fromFileUri(uri);
-      if (sdkSource != null) {
-        AnalysisContext sdkContext = defaultSdk.context;
-        return new ContextSourcePair(sdkContext, sdkSource);
+      DartSdk sdk = findSdk();
+      if (sdk != null) {
+        Uri uri = resourceProvider.pathContext.toUri(path);
+        Source sdkSource = sdk.fromFileUri(uri);
+        if (sdkSource != null) {
+          return new ContextSourcePair(sdk.context, sdkSource);
+        }
       }
     }
     // try to find the deep-most containing context
     Resource resource = resourceProvider.getResource(path);
     if (resource is! File) {
       return new ContextSourcePair(null, null);
     }
     File file = resource;
     {
       AnalysisContext containingContext = getContainingContext(path);
@@ skipping 924 matching lines @@
           AnalysisEngine.instance.logger.logError(
               'Invalid glob pattern: "$pattern"',
               new CaughtException(exception, stackTrace));
         }
       }
     }
     return _analyzedFilesGlobs;
   }
 
   @override
-  AnalysisContext addContext(Folder folder, FolderDisposition disposition) {
+  AnalysisOptions get defaultAnalysisOptions =>
+      analysisServer.defaultContextOptions;
+
+  @override
+  AnalysisContext addContext(
+      Folder folder, AnalysisOptions options, FolderDisposition disposition) {
     InternalAnalysisContext context =
         AnalysisEngine.instance.createAnalysisContext();
     context.contentCache = analysisServer.overlayState;
     analysisServer.folderMap[folder] = context;
     _locateEmbedderYamls(context, disposition);
-    context.sourceFactory = _createSourceFactory(context, disposition, folder);
-    context.analysisOptions =
-        new AnalysisOptionsImpl.from(analysisServer.defaultContextOptions);
+    context.sourceFactory =
+        _createSourceFactory(context, options, disposition, folder);
+    context.analysisOptions = options;
     analysisServer._onContextsChangedController
         .add(new ContextsChangedEvent(added: [context]));
     analysisServer.schedulePerformAnalysisOperation(context);
     return context;
   }
 
   @override
   void applyChangesToContext(Folder contextFolder, ChangeSet changeSet) {
     AnalysisContext context = analysisServer.folderMap[contextFolder];
     if (context != null) {
@@ skipping 48 matching lines @@
         return file.exists;
       }
     }
     return false;
   }
 
   @override
   void updateContextPackageUriResolver(
       Folder contextFolder, FolderDisposition disposition) {
     AnalysisContext context = analysisServer.folderMap[contextFolder];
-    context.sourceFactory =
-        _createSourceFactory(context, disposition, contextFolder);
+    context.sourceFactory = _createSourceFactory(
+        context, context.analysisOptions, disposition, contextFolder);
     analysisServer._onContextsChangedController
         .add(new ContextsChangedEvent(changed: [context]));
     analysisServer.schedulePerformAnalysisOperation(context);
   }
 
   void _computingPackageMap(bool computing) {
     if (analysisServer.serverServices.contains(ServerService.STATUS)) {
       PubStatus pubStatus = new PubStatus(computing);
       ServerStatusParams params = new ServerStatusParams(pub: pubStatus);
       analysisServer.sendNotification(params.toNotification());
     }
   }
 
   /**
    * Set up a [SourceFactory] that resolves packages as appropriate for the
    * given [disposition].
    */
   SourceFactory _createSourceFactory(InternalAnalysisContext context,
-      FolderDisposition disposition, Folder folder) {
+      AnalysisOptions options, FolderDisposition disposition, Folder folder) {
     List<UriResolver> resolvers = [];
     List<UriResolver> packageUriResolvers =
         disposition.createPackageUriResolvers(resourceProvider);
 
     EmbedderUriResolver embedderUriResolver;
 
     // First check for a resolver provider.
     ContextManager contextManager = analysisServer.contextManager;
     if (contextManager is ContextManagerImpl) {
       EmbeddedResolverProvider resolverProvider =
           contextManager.embeddedUriResolverProvider;
       if (resolverProvider != null) {
         embedderUriResolver = resolverProvider(folder);
       }
     }
 
     // If no embedded URI resolver was provided, defer to a locator-backed one.
     embedderUriResolver ??=
         new EmbedderUriResolver(context.embedderYamlLocator.embedderYamls);
     if (embedderUriResolver.length == 0) {
       // The embedder uri resolver has no mappings. Use the default Dart SDK
       // uri resolver.
-      resolvers.add(new DartUriResolver(analysisServer.defaultSdk));
+      resolvers.add(new DartUriResolver(
+          analysisServer.sdkManager.getSdkForOptions(options)));
     } else {
       // The embedder uri resolver has mappings, use it instead of the default
       // Dart SDK uri resolver.
       resolvers.add(embedderUriResolver);
     }
 
     resolvers.addAll(packageUriResolvers);
     resolvers.add(new ResourceUriResolver(resourceProvider));
     return new SourceFactory(resolvers, disposition.packages);
   }
@@ skipping 106 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }