Support (de)serialization from command-line

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, 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 dart2js.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'cache_strategy.dart' show CacheStrategy;
@@ skipping 346 matching lines @@
       checker = new TypeCheckerTask(this),
       typesTask = new ti.TypesTask(this),
       constants = backend.constantCompilerTask,
       deferredLoadTask = new DeferredLoadTask(this),
       mirrorUsageAnalyzerTask = new MirrorUsageAnalyzerTask(this),
       enqueuer = backend.makeEnqueuer(),
       dumpInfoTask = new DumpInfoTask(this),
       reuseLibraryTask = new GenericTask('Reuse library', this),
       selfTask = new GenericTask('self', this),
     ];
+    if (options.resolveOnly) {
+      serialization.supportSerialization = true;
+    }
 
     _parsingContext =
         new ParsingContext(reporter, options, parser, patchParser, backend);
 
     tasks.addAll(backend.tasks);
   }
 
   /// Creates the scanner task.
   ///
   /// Override this to mock the scanner for testing.
@@ skipping 474 matching lines @@
         _reporter.reportSuppressedMessagesSummary();
 
         if (compilationFailed) {
           if (!options.generateCodeWithCompileTimeErrors) return;
           if (!backend
               .enableCodegenWithErrorsIfSupported(NO_LOCATION_SPANNABLE)) {
             return;
           }
         }
 
+        if (options.resolveOnly) {
+          reporter.log('Serializing to ${options.resolutionOutput}');
+          serialization.serializeToSink(
+              userOutputProvider.createEventSink('', 'data'),
+              libraryLoader.libraries);
+        }
         if (options.analyzeOnly) {
           if (!analyzeAll && !compilationFailed) {
             // No point in reporting unused code when [analyzeAll] is true: all
             // code is artificially used.
             // If compilation failed, it is possible that the error prevents the
             // compiler from analyzing all the code.
             // TODO(johnniwinther): Reenable this when the reporting is more
             // precise.
             //reportUnusedCode();
           }
@@ skipping 1219 matching lines @@
   _ElementScanner(this.scanner);
   void scanLibrary(LibraryElement library) => scanner.scanLibrary(library);
   void scanUnit(CompilationUnitElement unit) => scanner.scan(unit);
 }
 
 class _EmptyEnvironment implements Environment {
   const _EmptyEnvironment();
 
   String valueOf(String key) => null;
 }