debug MemoryResourceProvider on Windows

pkg/analyzer/lib/src/context/builder.dart

 // Copyright (c) 2016, 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_builder;
 
 import 'dart:collection';
 import 'dart:core';
 
 import 'package:analyzer/context/declared_variables.dart';
@@ skipping 375 matching lines @@
       } catch (_) {
         // Ignore exceptions thrown while trying to load the options file.
       }
     } else {
       // Search for the default analysis options
       Source source;
       // TODO(danrubel) determine if bazel or gn project depends upon flutter
       if (workspace.hasFlutterDependency) {
         source =
             sourceFactory.forUri('package:flutter/analysis_options_user.yaml');
+        if (resourceProvider.pathContext.separator == r'\') {
+          // echo some debugging information
+          print('>>> hasFlutterDependency');
+          print('>>> source: ${source?.fullName}');
+          print('>>> source exists: ${source?.exists()}');
+          sourceFactory.packageMap.forEach((String key, List<Folder> folders) {
+            print('>>> p $key : ${folders.map((f) => f.path).join(', ')}');
+          });
+        }
       }
       if (source == null || !source.exists()) {
         source =
             sourceFactory.forUri('package:dart.analysis_options/default.yaml');
       }
       if (source.exists()) {
         try {
           optionMap = optionsProvider.getOptionsFromSource(source);
         } catch (_) {
           // Ignore exceptions thrown while trying to load the options file.
@@ skipping 360 matching lines @@
   }
 
   /**
    * Find the basic workspace that contains the given [path].
    */
   static _BasicWorkspace find(
       ResourceProvider resourceProvider, String path, ContextBuilder builder) {
     return new _BasicWorkspace._(resourceProvider, path, builder);
   }
 }