Add --build-summary-only-diet option.

pkg/analyzer_cli/lib/src/build_mode.dart

 // Copyright (c) 2015, 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_cli.src.build_mode;
 
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 127 matching lines @@
     // Create the context.
     context = AnalysisEngine.instance.createAnalysisContext();
     context.sourceFactory = new SourceFactory(<UriResolver>[
       new DartUriResolver(sdk),
       new InSummaryPackageUriResolver(summaryDataStore),
       new ExplicitSourceResolver(uriToFileMap)
     ]);
 
     // Set context options.
     Driver.setAnalysisContextOptions(
-        context, options, (AnalysisOptionsImpl contextOptions) {});
+        context, options, (AnalysisOptionsImpl contextOptions) {
+      if (options.buildSummaryOnlyDiet) {
+        contextOptions.analyzeFunctionBodies = false;
+      }
+    });
 
     // Configure using summaries.
     context.typeProvider = sdk.context.typeProvider;
     context.resultProvider =
         new InputPackagesResultProvider(context, summaryDataStore);
   }
 
   /**
    * Print errors for all explicit sources.  If [outputPath] is supplied, output
    * is sent to a new file at that path.
@@ skipping 36 matching lines @@
             'Illegal input file (must be "\$uri|\$path"): $sourceFile');
         return null;
       }
       Uri uri = Uri.parse(sourceFile.substring(0, pipeIndex));
       String path = sourceFile.substring(pipeIndex + 1);
       uriToFileMap[uri] = new JavaFile(path);
     }
     return uriToFileMap;
   }
 }