As a temporary measure, allow SDK to be specified on analysis server cmd line.

pkg/analysis_server/lib/src/package_map_provider.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 package.map.provider;
 
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io' as io;
 
-import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:path/path.dart';
 
 /**
  * Data structure output by PackageMapProvider.  This contains both the package
  * map and dependency information.
  */
 class PackageMapInfo {
   /**
    * The package map itself.  This is a map from package name to a list of
    * the folders containing source code for the package.
@@ skipping 37 matching lines @@
    * in the event that [PUB_LIST_COMMAND] fails.
    */
   static const String PUBSPEC_LOCK_NAME = 'pubspec.lock';
 
   /**
    * [ResourceProvider] that is used to create the [Folder]s that populate the
    * package map.
    */
   final ResourceProvider resourceProvider;
 
-  PubPackageMapProvider(this.resourceProvider);
+  /**
+   * Sdk that we use to find the pub executable.
+   */
+  final DirectoryBasedDartSdk sdk;
+
+  PubPackageMapProvider(this.resourceProvider, this.sdk);
 
   @override
   PackageMapInfo computePackageMap(Folder folder) {
     // TODO(paulberry) make this asynchronous so that we can (a) do other
     // analysis while it's in progress, and (b) time out if it takes too long
     // to respond.
-    String executable = SHARED_SDK.pubExecutable.getAbsolutePath();
+    String executable = sdk.pubExecutable.getAbsolutePath();
     io.ProcessResult result;
     try {
       result = io.Process.runSync(
           executable, [PUB_LIST_COMMAND], workingDirectory: folder.path);
     } on io.ProcessException catch (exception, stackTrace) {
       AnalysisEngine.instance.logger.logInformation(
           "Error running pub $PUB_LIST_COMMAND\n${exception}\n${stackTrace}");
     }
     if (result.exitCode != 0) {
       AnalysisEngine.instance.logger.logInformation(
@@ skipping 67 matching lines @@
    */
   PackageMapInfo _error(Folder folder) {
     // Even if an error occurs, we still need to know the dependencies, so that
     // we'll know when to try running "pub list-package-dirs" again.
     // Unfortunately, "pub list-package-dirs" doesn't tell us dependencies when
     // an error occurs, so just assume there is one dependency, "pubspec.lock".
     List<String> dependencies = <String>[join(folder.path, PUBSPEC_LOCK_NAME)];
     return new PackageMapInfo(null, dependencies.toSet());
   }
 }