Formalizing the hacks letting the angular analyzer plugin run for now.

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';
@@ skipping 42 matching lines @@
  * 4. Look for an analysis options file (`analyis_options.yaml` or
  *    `.analysis_options`) and process the options in the file.
  *
  * 5. Create a new context. Initialize its source factory based on steps 1, 2
  *    and 3. Initialize its analysis options from step 4.
  *
  * [1]: https://github.com/dart-lang/dart_enhancement_proposals/blob/master/Accepted/0005%20-%20Package%20Specification/DEP-pkgspec.md.
  */
 class ContextBuilder {
   /**
+   * A callback for when analysis drivers are created, which takes all the same
+   * arguments as the dart analysis driver constructor so that plugins may
+   * create their own drivers with the same tools, in theory. Here as a stopgap
+   * until the official plugin API is complete
+   */
+  static Function onCreateAnalysisDriver = null;
+
+  /**
    * The [ResourceProvider] by which paths are converted into [Resource]s.
    */
   final ResourceProvider resourceProvider;
 
   /**
    * The manager used to manage the DartSdk's that have been created so that
    * they can be shared across contexts.
    */
   final DartSdkManager sdkManager;
 
@@ skipping 69 matching lines @@
     return context;
   }
 
   /**
    * Return an analysis driver that is configured correctly to analyze code in
    * the directory with the given [path].
    */
   AnalysisDriver buildDriver(String path) {
     AnalysisOptions options = getAnalysisOptions(path);
     //_processAnalysisOptions(context, optionMap);
+    final sf = createSourceFactory(path, options);
     AnalysisDriver driver = new AnalysisDriver(
         analysisDriverScheduler,
         performanceLog,
         resourceProvider,
         byteStore,
         fileContentOverlay,
         path,
-        createSourceFactory(path, options),
+        sf,
         options);
+    // temporary plugin support:
+    if (onCreateAnalysisDriver != null) {
+      onCreateAnalysisDriver(driver, analysisDriverScheduler, performanceLog,
+          resourceProvider, byteStore, fileContentOverlay, path, sf, options);
+    }
     declareVariablesInDriver(driver);
     return driver;
   }
 
   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)];
@@ skipping 618 matching lines @@
 
     // Ensure that the path is absolute and normalized.
     if (!context.isAbsolute(path)) {
       throw new ArgumentError('not absolute: $path');
     }
     path = context.normalize(path);
 
     return new _BasicWorkspace._(provider, path, builder);
   }
 }