Simplify how patch files are specified to analyzer.

pkg/analyzer/lib/src/context/context.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.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 282 matching lines @@
             : false) ||
         ((options is AnalysisOptionsImpl)
             ? this._options.nonnullableTypes != options.nonnullableTypes
             : false) ||
         ((options is AnalysisOptionsImpl)
             ? this._options.implicitDynamic != options.implicitDynamic
             : false) ||
         this._options.enableStrictCallChecks !=
             options.enableStrictCallChecks ||
         this._options.enableSuperMixins != options.enableSuperMixins ||
-        this._options.patchPlatform != options.patchPlatform;
+        !_samePatchPaths(this._options.patchPaths, options.patchPaths);
     this._options.analyzeFunctionBodiesPredicate =
         options.analyzeFunctionBodiesPredicate;
     this._options.generateImplicitErrors = options.generateImplicitErrors;
     this._options.generateSdkErrors = options.generateSdkErrors;
     this._options.dart2jsHint = options.dart2jsHint;
     this._options.enableAssertInitializer = options.enableAssertInitializer;
     this._options.enableStrictCallChecks = options.enableStrictCallChecks;
     this._options.enableLazyAssignmentOperators =
         options.enableLazyAssignmentOperators;
     this._options.enableSuperMixins = options.enableSuperMixins;
     this._options.enableTiming = options.enableTiming;
     this._options.errorProcessors = options.errorProcessors;
     this._options.excludePatterns = options.excludePatterns;
     this._options.hint = options.hint;
     this._options.incremental = options.incremental;
     this._options.incrementalApi = options.incrementalApi;
     this._options.incrementalValidation = options.incrementalValidation;
     this._options.lint = options.lint;
     this._options.lintRules = options.lintRules;
     this._options.preserveComments = options.preserveComments;
     if (this._options.strongMode != options.strongMode) {
       _typeSystem = null;
     }
     this._options.strongMode = options.strongMode;
     this._options.trackCacheDependencies = options.trackCacheDependencies;
     this._options.disableCacheFlushing = options.disableCacheFlushing;
     this._options.finerGrainedInvalidation = options.finerGrainedInvalidation;
-    this._options.patchPlatform = options.patchPlatform;
+    this._options.patchPaths = options.patchPaths;
     if (options is AnalysisOptionsImpl) {
       this._options.strongModeHints = options.strongModeHints;
       this._options.implicitCasts = options.implicitCasts;
       this._options.nonnullableTypes = options.nonnullableTypes;
       this._options.implicitDynamic = options.implicitDynamic;
     }
     if (needsRecompute) {
       for (WorkManager workManager in workManagers) {
         workManager.onAnalysisOptionsChanged();
       }
@@ skipping 1617 matching lines @@
         AnalysisErrorInfo errorInfo = getErrors(unitSource);
         notice.setErrors(errorInfo.errors, errorInfo.lineInfo);
       }
       // schedule
       dartWorkManager.unitIncrementallyResolved(librarySource, unitSource);
       // OK
       driver.reset();
       return true;
     });
   }
+
+  static bool _samePatchPaths(
+      Map<String, List<String>> a, Map<String, List<String>> b) {
+    if (a.length != b.length) return false;
+    for (var key in a.keys) {
+      if (!b.containsKey(key)) return false;
+      var aValue = a[key];
+      var bValue = b[key];
+      if (aValue.length != bValue.length) return false;
+      for (var i = 0; i < aValue.length; i++) {
+        if (aValue[i] != bValue[i]) return false;
+      }
+    }
+    return true;
+  }
 }
 
 /**
  * A helper class used to create futures for [AnalysisContextImpl].
  * Using a helper class allows us to preserve the generic parameter T.
  */
 class AnalysisFutureHelper<T> {
   final AnalysisContextImpl _context;
   final AnalysisTarget _target;
   final ResultDescriptor<T> _descriptor;
@@ skipping 267 matching lines @@
     }
     DartSdk sdk = factory.dartSdk;
     if (sdk == null) {
       throw new ArgumentError(
           "The source factory for an SDK analysis context must have a DartUriResolver");
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }