Initial support for an explicit plugin list

pkg/analyzer/lib/src/task/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.src.task.options;
 
 import 'dart:collection';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/plugin/options.dart';
@@ skipping 498 matching lines @@
       var filters = analyzer[AnalyzerOptions.errors];
       _applyProcessors(options, filters);
 
       // Process language options.
       var language = analyzer[AnalyzerOptions.language];
       _applyLanguageOptions(options, language);
 
       // Process excludes.
       var excludes = analyzer[AnalyzerOptions.exclude];
       _applyExcludes(options, excludes);
+
+      // Process plugins.
+      var names = analyzer[AnalyzerOptions.plugins];
+      List<String> pluginNames = <String>[];
+      if (names is String) {
+        pluginNames.add(names);
+      } else if (names is YamlList) {
+        for (var element in names) {
+          if (element is String) {
+            pluginNames.add(element);
+          }
+        }
+      } else if (names is YamlMap) {
+        for (var key in names.keys) {
+          if (key is String) {
+            pluginNames.add(key);
+          }
+        }
+      }
+      options.enabledPluginNames = pluginNames;
     }
 
     LintConfig config = parseConfig(optionMap);
     if (config != null) {
       Iterable<LintRule> lintRules = Registry.ruleRegistry.enabled(config);
       if (lintRules.isNotEmpty) {
         options.lint = true;
         options.lintRules = lintRules.toList();
       }
     }
@@ skipping 66 matching lines @@
         }
       });
     } else if (config is Map) {
       options.strongMode = true;
       config.forEach((k, v) => _applyStrongModeOption(options, k, v));
     } else {
       options.strongMode = config is bool ? config : false;
     }
   }
 }