ContextBuilder can configure contexts to use summaries

pkg/analyzer/lib/src/context/builder.dart

 // Copyright (c) 2016, 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 analyzer.src.context.context_builder;
 
 import 'dart:collection';
 import 'dart:core';
 
 import 'package:analyzer/context/declared_variables.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/plugin/options.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/package_bundle_reader.dart';
+import 'package:analyzer/src/summary/pub_summary.dart';
 import 'package:analyzer/src/task/options.dart';
 import 'package:package_config/packages.dart';
 import 'package:package_config/packages_file.dart';
 import 'package:package_config/src/packages_impl.dart';
 import 'package:path/src/context.dart';
 import 'package:yaml/yaml.dart';
 
 /**
  * A utility class used to build an analysis context for a given directory.
  *
@@ skipping 74 matching lines @@
    */
   AnalysisOptions defaultOptions;
 
   /**
    * A table mapping variable names to values for the declared variables, or
    * `null` if no additional variables should be declared.
    */
   Map<String, String> declaredVariables;
 
   /**
+   * The manager of pub package summaries.
+   */
+  PubSummaryManager pubSummaryManager;
+
+  /**
    * Initialize a newly created builder to be ready to build a context rooted in
    * the directory with the given [rootDirectoryPath].
    */
   ContextBuilder(this.resourceProvider, this.sdkManager, this.contentCache);
 
   /**
    * Return an analysis context that is configured correctly to analyze code in
    * the directory with the given [path].
    *
    * *Note:* This method is not yet fully implemented and should not be used.
    */
   AnalysisContext buildContext(String path) {
     InternalAnalysisContext context =
         AnalysisEngine.instance.createAnalysisContext();
     AnalysisOptions options = getAnalysisOptions(context, path);
     context.contentCache = contentCache;
     context.sourceFactory = createSourceFactory(path, options);
     context.analysisOptions = options;
     context.name = path;
     //_processAnalysisOptions(context, optionMap);
     declareVariables(context);
+    configureSummaries(context);
     return context;
   }
 
+  /**
+   * Configure the context to make use of summaries.
+   */
+  void configureSummaries(InternalAnalysisContext context) {
+    if (pubSummaryManager != null) {
+      List<LinkedPubPackage> linkedBundles =
+          pubSummaryManager.getLinkedBundles(context);
+      if (linkedBundles.isNotEmpty) {
+        SummaryDataStore store = new SummaryDataStore([]);
+        for (LinkedPubPackage package in linkedBundles) {
+          store.addBundle(null, package.unlinked);
+          store.addBundle(null, package.linked);
+        }
+        context.resultProvider =
+            new InputPackagesResultProvider(context, store);
+      }
+    }
+  }
+
   Map<String, List<Folder>> convertPackagesToMap(Packages packages) {
     Map<String, List<Folder>> folderMap = new HashMap<String, List<Folder>>();
     if (packages != null && packages != Packages.noPackages) {
       packages.asMap().forEach((String packageName, Uri uri) {
         String path = resourceProvider.pathContext.fromUri(uri);
         folderMap[packageName] = [resourceProvider.getFolder(path)];
       });
     }
     return folderMap;
   }
@@ skipping 416 matching lines @@
   String _readEmbedderYaml(Folder libDir) {
     File file = libDir.getChild(EMBEDDER_FILE_NAME);
     try {
       return file.readAsStringSync();
     } on FileSystemException {
       // File can't be read.
       return null;
     }
   }
 }