echo analysis options information if dartanalyzer --verbose is specified

pkg/analyzer/lib/src/command_line/arguments.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.command_line.arguments;
 
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/builder.dart';
@@ skipping 14 matching lines @@
 const String noImplicitDynamicFlag = 'no-implicit-dynamic';
 const String packageRootOption = 'package-root';
 const String packagesOption = 'packages';
 const String sdkPathOption = 'dart-sdk';
 const String sdkSummaryPathOption = 'dart-sdk-summary';
 const String strongModeFlag = 'strong';
 
 /**
  * Update [options] with the value of each analysis option command line flag.
  */
-void applyAnalysisOptionFlags(AnalysisOptionsImpl options, ArgResults args) {
+void applyAnalysisOptionFlags(AnalysisOptionsImpl options, ArgResults args,
+    {void verbosePrint(String text)}) {
+  void verbose(String text) {
+    if (verbosePrint != null) {
+      verbosePrint('Analysis options: $text');
+    }
+  }
+
   if (args.wasParsed(enableStrictCallChecksFlag)) {
     options.enableStrictCallChecks = args[enableStrictCallChecksFlag];
+    verbose('$enableStrictCallChecksFlag = ${options.enableStrictCallChecks}');
   }
   if (args.wasParsed(enableSuperMixinFlag)) {
     options.enableSuperMixins = args[enableSuperMixinFlag];
+    verbose('$enableSuperMixinFlag = ${options.enableSuperMixins}');
   }
   if (args.wasParsed(noImplicitCastsFlag)) {
     options.implicitCasts = !args[noImplicitCastsFlag];
+    verbose('$noImplicitCastsFlag = ${options.implicitCasts}');
   }
   if (args.wasParsed(noImplicitDynamicFlag)) {
     options.implicitDynamic = !args[noImplicitDynamicFlag];
+    verbose('$noImplicitDynamicFlag = ${options.implicitDynamic}');
   }
   if (args.wasParsed(strongModeFlag)) {
     options.strongMode = args[strongModeFlag];
+    verbose('$strongModeFlag = ${options.strongMode}');
   }
   try {
     if (args.wasParsed(lintsFlag)) {
       options.lint = args[lintsFlag];
+      verbose('$lintsFlag = ${options.lint}');
     }
   } on ArgumentError {
     // lints were not defined - ignore and fall through
   }
 }
 
 /**
  * Use the given [resourceProvider], [contentCache] and command-line [args] to
  * create a context builder.
  */
@@ skipping 250 matching lines @@
           .replaceAll('\r\n', '\n')
           .replaceAll('\r', '\n')
           .split('\n')
           .where((String line) => line.isNotEmpty));
     } on FileSystemException catch (e) {
       throw new Exception('Failed to read file specified by $lastArg : $e');
     }
   }
   return args;
 }