Start adding experimental incremental analysis mode into CLI analyzer.

pkg/analyzer_cli/lib/src/options.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.options;
 
 import 'dart:io';
 
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:args/args.dart';
@@ skipping 94 matching lines @@
 
   /// Whether to report lints
   final bool lints;
 
   /// Whether to log additional analysis messages and exceptions
   final bool log;
 
   /// Whether to use machine format for error display
   final bool machineFormat;
 
+  /// The path to the root folder of the incremental cache.
+  final String incrementalCachePath;
+
   /// The path to the package root
   final String packageRootPath;
 
   /// The path to a `.packages` configuration file
   final String packageConfigPath;
 
   /// The path to a file to write a performance log.
   /// (Or null if not enabled.)
   final String perfReport;
 
@@ skipping 44 matching lines @@
         displayVersion = args['version'],
         enableNullAwareOperators = args['enable-null-aware-operators'],
         enableStrictCallChecks = args['enable-strict-call-checks'],
         enableSuperMixins = args['supermixin'],
         enableTypeChecks = args['enable_type_checks'],
         hintsAreFatal = args['fatal-hints'],
         ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
         lints = args['lints'],
         log = args['log'],
         machineFormat = args['machine'] || args['format'] == 'machine',
+        incrementalCachePath = args['incremental-cache-path'],
         packageConfigPath = args['packages'],
         packageRootPath = args['package-root'],
         perfReport = args['x-perf-report'],
         shouldBatch = args['batch'],
         showPackageWarnings = args['show-package-warnings'] ||
             args['package-warnings'] ||
             args['x-package-warnings-prefix'] != null,
         showPackageWarningsPrefix = args['x-package-warnings-prefix'],
         showSdkWarnings = args['show-sdk-warnings'] || args['warnings'],
         sourceFiles = args.rest,
@@ skipping 155 matching lines @@
           help: 'Display this help message.',
           defaultsTo: false,
           negatable: false)
       ..addOption('url-mapping',
           help: '--url-mapping=libraryUri,/path/to/library.dart directs the '
               'analyzer to use "library.dart" as the source for an import '
               'of "libraryUri".',
           allowMultiple: true,
           splitCommas: false)
       //
+      // Incremental analysis.
+      //
+      ..addOption('incremental-cache-path',
+          help: 'The path to the folder with information to support '
+              'incremental analysis, e.g. summary files, errors, etc.',
+          hide: true)
+      //
       // Build mode.
       //
       ..addFlag('persistent_worker',
           help: 'Enable Bazel persistent worker mode.',
           defaultsTo: false,
           negatable: false,
           hide: true)
       ..addOption('build-analysis-output',
           help:
               'Specifies the path to the file where analysis results should be written.',
@@ skipping 309 matching lines @@
 
   int _getNextFlagIndex(args, i) {
     for (; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }