Roll Observatory deps (charted -> ^0.3.0)

packages/analyzer/lib/src/services/lint.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 lint;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/visitors.dart';
+import 'package:analyzer/src/task/model.dart';
+import 'package:analyzer/task/model.dart';
 
-/// A registry containing mappings of contexts to their associated configured
-/// lints.
-final Map<AnalysisContext, List<Linter>> lintRegistry =
-    <AnalysisContext, List<Linter>>{};
+const List<Linter> _noLints = const <Linter>[];
+
+/// The descriptor used to associate lints with analysis contexts in
+/// configuration data.
+final ResultDescriptor<List<Linter>> CONFIGURED_LINTS_KEY =
+    new ResultDescriptorImpl('configured.lints', _noLints);
+
+/// Return lints associated with this [context], or an empty list if there are
+/// none.
+List<Linter> getLints(AnalysisContext context) =>
+    context.getConfigurationData(CONFIGURED_LINTS_KEY) ?? _noLints;
+
+/// Associate these [lints] with the given [context].
+void setLints(AnalysisContext context, List<Linter> lints) {
+  context.setConfigurationData(CONFIGURED_LINTS_KEY, lints);
+}
 
 /// Implementers contribute lint warnings via the provided error [reporter].
 abstract class Linter {
   /// Used to report lint warnings.
   /// NOTE: this is set by the framework before visit begins.
   ErrorReporter reporter;
 
   /// Return a visitor to be passed to compilation units to perform lint
   /// analysis.
   /// Lint errors are reported via this [Linter]'s error [reporter].
   AstVisitor getVisitor();
 }
 
 /// Traverses a library's worth of dart code at a time to generate lint warnings
 /// over the set of sources.
 ///
 /// See [LintCode].
 class LintGenerator {
-  /// A global container for contributed linters.
-  @deprecated // Use lintRegistry.
-  static final List<Linter> LINTERS = <Linter>[];
+  static const List<Linter> _noLints = const <Linter>[];
 
   final Iterable<CompilationUnit> _compilationUnits;
   final AnalysisErrorListener _errorListener;
   final Iterable<Linter> _linters;
 
   LintGenerator(this._compilationUnits, this._errorListener,
       [Iterable<Linter> linters])
-      : _linters = linters ?? LINTERS;
+      : _linters = linters ?? _noLints;
 
   void generate() {
     PerformanceStatistics.lint.makeCurrentWhile(() {
       _compilationUnits.forEach((cu) {
         if (cu.element != null) {
           _generate(cu, cu.element.source);
         }
       });
     });
   }
 
   void _generate(CompilationUnit unit, Source source) {
     ErrorReporter errorReporter = new ErrorReporter(_errorListener, source);
     _linters.forEach((l) => l.reporter = errorReporter);
     Iterable<AstVisitor> visitors = _linters.map((l) => l.getVisitor());
     unit.accept(new DelegatingAstVisitor(visitors.where((v) => v != null)));
   }
 }