Add an analyzer_cli option to disable analysis (for faster summary generation)

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 68 matching lines @@
 
   /// The path of the root folder of the package to analyze.
   final String packageModePath;
 
   /// The name of the package being analyzed.
   final String packageName;
 
   /// Mapping of package names to package summary file paths.
   final Map<String, String> packageSummaryInputs;
 
+  /// Whether to skip analysis when creating summaries.
+  final bool packageSummaryOnly;
+
   /// The path to find the package summary.
   final String packageSummaryOutput;
 
   /// 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.
@@ skipping 32 matching lines @@
         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',
         packageMode = args['package-mode'],
         packageModePath = args['package-mode-path'],
         packageName = args['package-name'],
         packageSummaryInputs = _parsePackageSummaryInputs(args),
+        packageSummaryOnly = args['package-summary-only'],
         packageSummaryOutput = args['package-summary-output'],
         packageConfigPath = args['packages'],
         packageRootPath = args['package-root'],
         perfReport = args['x-perf-report'],
         shouldBatch = args['batch'],
         showPackageWarnings =
             args['show-package-warnings'] || args['package-warnings'],
         showSdkWarnings = args['show-sdk-warnings'] || args['warnings'],
         sourceFiles = args.rest,
         warningsAreFatal = args['fatal-warnings'],
@@ skipping 155 matching lines @@
           help: '--package-summary-input=packageName,/path/to/package.sum '
               'specifies the summary file that contains information about '
               'every library of the specified package.',
           allowMultiple: true,
           splitCommas: false,
           hide: true)
       ..addOption('package-summary-output',
           help: 'Specifies the path to the file where the summary information '
               'about the package should be written to.',
           hide: true)
+      ..addFlag('package-summary-only',
+          help: 'Disable analysis (only generate summaries).',
+          defaultsTo: false,
+          negatable: false,
+          hide: true)
       //
       // Hidden flags.
       //
       ..addFlag('enable-async',
           help: 'Enable support for the proposed async feature.',
           defaultsTo: false,
           negatable: false,
           hide: true)
       ..addFlag('enable-enum',
           help: 'Enable support for the proposed enum feature.',
@@ skipping 238 matching lines @@
 
   int _getNextFlagIndex(args, i) {
     for (; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }