enable/disable default package contributed analysis options

pkg/analyzer/lib/src/command_line/arguments.dart

Index: pkg/analyzer/lib/src/command_line/arguments.dart
diff --git a/pkg/analyzer/lib/src/command_line/arguments.dart b/pkg/analyzer/lib/src/command_line/arguments.dart
index 5579005fc7999454e43c73bedd121377bd69c18e..10bd00c2279065d854c758983f6721681adcc931 100644
--- a/pkg/analyzer/lib/src/command_line/arguments.dart
+++ b/pkg/analyzer/lib/src/command_line/arguments.dart
@@ -23,12 +23,18 @@ const String ignoreUnrecognizedFlagsFlag = 'ignore-unrecognized-flags';
 const String lintsFlag = 'lints';
 const String noImplicitCastsFlag = 'no-implicit-casts';
 const String noImplicitDynamicFlag = 'no-implicit-dynamic';
+const String packageDefaultAnalysisOptions = 'package-default-analysis-options';
 const String packageRootOption = 'package-root';
 const String packagesOption = 'packages';
 const String sdkPathOption = 'dart-sdk';
 const String sdkSummaryPathOption = 'dart-sdk-summary';
 const String strongModeFlag = 'strong';
 
+const String bazelAnalysisOptionsPath =
+    'package:dart.analysis_options/default.yaml';
+const String flutterAnalysisOptionsPath =
+    'package:flutter/analysis_options_user.yaml';
+
 /**
  * Update [options] with the value of each analysis option command line flag.
  */
@@ -87,6 +93,11 @@ ContextBuilderOptions createContextBuilderOptions(ArgResults args,
   builderOptions.defaultPackageFilePath = args[packagesOption];
   builderOptions.defaultPackagesDirectoryPath = args[packageRootOption];
   //
+  // Flags.
+  //
+  builderOptions.packageDefaultAnalysisOptions =
+      args[packageDefaultAnalysisOptions];
+  //
   // Analysis options.
   //
   AnalysisOptionsImpl defaultOptions = new AnalysisOptionsImpl();
@@ -179,6 +190,17 @@ void defineAnalysisArguments(ArgParser parser, {bool hide: true, ddc: false}) {
       help: 'Define environment variables. For example, "-Dfoo=bar" defines an '
           'environment variable named "foo" whose value is "bar".',
       hide: hide);
+  parser.addFlag(packageDefaultAnalysisOptions,
+      help: 'If an analysis options file is not explicitly specified '
+          'via the "--$analysisOptionsFileOption" option\n'
+          'and an analysis options file cannot be found '
+          'in the project directory or any parent directory,\n'
+          'then look for analysis options in the following locations:\n'
+          '- $flutterAnalysisOptionsPath\n'
+          '- $bazelAnalysisOptionsPath',
+      defaultsTo: true,
+      negatable: true,
+      hide: hide);
   parser.addOption(packagesOption,
       help: 'The path to the package resolution configuration file, which '
           'supplies a mapping of package names\nto paths. This option cannot be '