Add _embedder.yaml support to analyzer and analysis_server

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/plugin/analysis/resolver_provider.dart';
 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/source/analysis_options_provider.dart';
+import 'package:analyzer/source/embedder.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/context.dart' as context;
 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/source.dart';
@@ skipping 1396 matching lines @@
 }
 
 /**
  * Concrete [FolderDisposition] object indicating that the context for a given
  * folder should resolve packages using a ".packages" file.
  */
 class PackagesFileDisposition extends FolderDisposition {
   @override
   final Packages packages;
 
+  Map<String, List<Folder>> buildPackageMap(ResourceProvider resourceProvider) {
+    Map<String, List<Folder>> packageMap = <String, List<Folder>>{};
+    if (packages == null) {
+      return packageMap;
+    }
+    packages.asMap().forEach((String name, Uri uri) {
+      if (uri.scheme == 'file' || uri.scheme == '' /* unspecified */) {
+        var path = resourceProvider.pathContext.fromUri(uri);
+        packageMap[name] = <Folder>[resourceProvider.getFolder(path)];
+      }
+    });
+    return packageMap;
+  }
+
   PackagesFileDisposition(this.packages) {}
 
   @override
   String get packageRoot => null;
 
   @override
   Iterable<UriResolver> createPackageUriResolvers(
       ResourceProvider resourceProvider) {
     if (packages != null) {
       // Construct package map for the SdkExtUriResolver.
-      Map<String, List<Folder>> packageMap = <String, List<Folder>>{};
-      packages.asMap().forEach((String name, Uri uri) {
-        if (uri.scheme == 'file' || uri.scheme == '' /* unspecified */) {
-          var path = resourceProvider.pathContext.fromUri(uri);
-          packageMap[name] = <Folder>[resourceProvider.getFolder(path)];
-        }
-      });
+      Map<String, List<Folder>> packageMap =
+          buildPackageMap(resourceProvider);
       return <UriResolver>[new SdkExtUriResolver(packageMap)];
     } else {
       return const <UriResolver>[];
     }
   }
 }