Convert analysis server over to use ContextBuilder

pkg/analysis_server/lib/src/context_manager.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 context.directory.manager;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:core' hide Resource;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.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/config.dart';
 import 'package:analyzer/source/package_map_provider.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/source/path_filter.dart';
 import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/source/sdk_ext.dart';
 import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/context/context.dart' as context;
-import 'package:analyzer/src/context/source.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/task/options.dart';
 import 'package:analyzer/src/util/absolute_path.dart';
 import 'package:analyzer/src/util/glob.dart';
@@ skipping 299 matching lines @@
    */
   void applyChangesToContext(Folder contextFolder, ChangeSet changeSet);
 
   /**
    * Signals that the context manager has started to compute a package map (if
    * [computing] is `true`) or has finished (if [computing] is `false`).
    */
   void computingPackageMap(bool computing);
 
   /**
+   * Create and return a context builder that can be used to create a context
+   * for the files in the given [folder] when analyzed using the given [options].
+   */
+  ContextBuilder createContextBuilder(Folder folder, AnalysisOptions options);
+
+  /**
    * Called when the context manager changes the folder with which a context is
    * associated. Currently this is mostly FYI, and used only in tests.
    */
   void moveContext(Folder from, Folder to);
 
   /**
    * Remove the context associated with the given [folder].  [flushedFiles] is
    * a list of the files which will be "orphaned" by removing this context
    * (they will no longer be analyzed by any context).
    */
@@ skipping 536 matching lines @@
         callbacks.applyChangesToContext(info.folder, new ChangeSet());
       }
     }
   }
 
   void _checkForPackagespecUpdate(
       String path, ContextInfo info, Folder folder) {
     // Check to see if this is the .packages file for this context and if so,
     // update the context's source factory.
     if (absolutePathContext.basename(path) == PACKAGE_SPEC_NAME) {
-      File packagespec = resourceProvider.getFile(path);
-      if (packagespec.exists) {
-        // Locate embedder yamls for this .packages file.
-        // If any embedder libs are contributed and this context does not
-        // have an embedded URI resolver, we need to create a new context.
-
-        List<int> bytes = packagespec.readAsStringSync().codeUnits;
-        Map<String, Uri> packages =
-            pkgfile.parse(bytes, new Uri.file(packagespec.path));
-
-        Map<String, List<Folder>> packageMap =
-            new PackagesFileDisposition(new MapPackages(packages))
-                .buildPackageMap(resourceProvider);
-        Map<Folder, YamlMap> embedderYamls =
-            new EmbedderYamlLocator(packageMap).embedderYamls;
-
-        SourceFactory sourceFactory = info.context.sourceFactory;
-
-        // Check for library embedders.
-        if (embedderYamls.values.any(definesEmbeddedLibs)) {
-          // If there is no embedded URI resolver, a new source factory needs to
-          // be recreated.
-          if (sourceFactory is SourceFactoryImpl) {
-            // Get all but the dart: Uri resolver.
-            List<UriResolver> resolvers = sourceFactory.resolvers
-                .where((r) => r is! DartUriResolver)
-                .toList();
-            // Add an embedded URI resolver in its place.
-            resolvers.add(new DartUriResolver(
-                new EmbedderSdk(resourceProvider, embedderYamls)));
-
-            // Set a new source factory.
-            SourceFactoryImpl newFactory = sourceFactory.clone();
-            newFactory.resolvers.clear();
-            newFactory.resolvers.addAll(resolvers);
-            info.context.sourceFactory = newFactory;
-            return;
-          }
-        }
-
-        // Next check for package URI updates.
-        if (info.isPathToPackageDescription(path)) {
-          Packages packages = _readPackagespec(packagespec);
-          if (packages != null) {
-            _updateContextPackageUriResolver(
-                folder, new PackagesFileDisposition(packages));
-          }
-        }
-      }
+      String contextRoot = info.folder.path;
+      ContextBuilder builder =
+          callbacks.createContextBuilder(info.folder, defaultContextOptions);
+      AnalysisOptions options =
+          builder.getAnalysisOptions(info.context, contextRoot);
+      SourceFactory factory = builder.createSourceFactory(contextRoot, options);
+      info.context.analysisOptions = options;
+      info.context.sourceFactory = factory;
     }
   }
 
   /**
    * Compute the set of files that are being flushed, this is defined as
    * the set of sources in the removed context (context.sources), that are
    * orphaned by this context being removed (no other context includes this
    * file.)
    */
   List<String> _computeFlushedFiles(ContextInfo info) {
@@ skipping 929 matching lines @@
     }
     return _embedderLocator;
   }
 
   @override
   SdkExtensionFinder getSdkExtensionFinder(ResourceProvider resourceProvider) {
     return _sdkExtensionFinder ??=
         new SdkExtensionFinder(buildPackageMap(resourceProvider));
   }
 }