support --options flag and other analysis options flags in DDC

pkg/dev_compiler/lib/src/compiler/command.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.
 
 import 'dart:io';
 import 'package:analyzer/src/command_line/arguments.dart'
     show
         defineAnalysisArguments,
         filterUnknownArguments,
         ignoreUnrecognizedFlagsFlag;
@@ skipping 14 matching lines @@
 ///
 /// This handles argument parsing, usage, error handling.
 /// See bin/dartdevc.dart for the actual entry point, which includes Bazel
 /// worker support.
 int compile(List<String> args, {void printFn(Object obj)}) {
   printFn ??= print;
 
   ArgResults argResults;
   AnalyzerOptions analyzerOptions;
   try {
-    var parser = _argParser();
+    var parser = ddcArgParser();
     if (args.contains('--$ignoreUnrecognizedFlagsFlag')) {
       args = filterUnknownArguments(args, parser);
     }
     argResults = parser.parse(args);
     analyzerOptions = new AnalyzerOptions.fromArguments(argResults);
   } on FormatException catch (error) {
     printFn('$error\n\n$_usageMessage');
     return 64;
   }
 
@@ skipping 30 matching lines @@
     dartdevc arguments: ${args.join(' ')}
     dart --version: ${Platform.version}
 ```
 $error
 $stackTrace
 ```''');
     return 70;
   }
 }
 
-ArgParser _argParser({bool hide: true}) {
+ArgParser ddcArgParser({bool hide: true}) {
   var argParser = new ArgParser(allowTrailingOptions: true)
     ..addFlag('help',
         abbr: 'h',
         help: 'Display this message.\n'
             'Add --verbose to show hidden options.',
         negatable: false)
     ..addFlag('verbose', abbr: 'v', help: 'Verbose output.')
     ..addFlag(ignoreUnrecognizedFlagsFlag,
         help: 'Ignore unrecognized command line flags.',
         defaultsTo: false,
@@ skipping 121 matching lines @@
 
   _usageException(
       'Imported file "${source.uri}" was not found as a summary or source '
       'file. Please pass in either the summary or the source file '
       'for this import.');
   return null; // unreachable
 }
 
 String get _usageMessage =>
     'Dart Development Compiler compiles Dart into a JavaScript module.'
-    '\n\n${_argParser(hide: !_verbose).usage}';
+    '\n\n${ddcArgParser(hide: !_verbose).usage}';
 
 void _usageException(String message) {
   throw new UsageException(message, _usageMessage);
 }
 
 /// Thrown when the input source code has errors.
 class CompileErrorException implements Exception {
   toString() => '\nPlease fix all errors before compiling (warnings are okay).';
 }