Allow Analysis Server crawl up the folders to search .analysis_options file.

pkg/analyzer/lib/source/analysis_options_provider.dart

Index: pkg/analyzer/lib/source/analysis_options_provider.dart
diff --git a/pkg/analyzer/lib/source/analysis_options_provider.dart b/pkg/analyzer/lib/source/analysis_options_provider.dart
index b96ba5cebf2de765913c58eed54881cbc3005501..58bde71131078ed17872f4ddb7a0829026b3f3c2 100644
--- a/pkg/analyzer/lib/source/analysis_options_provider.dart
+++ b/pkg/analyzer/lib/source/analysis_options_provider.dart
@@ -4,6 +4,8 @@
 
 library analyzer.source.analysis_options_provider;
 
+import 'dart:core' hide Resource;
+
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/util/yaml.dart';
@@ -14,9 +16,15 @@ import 'package:yaml/yaml.dart';
 class AnalysisOptionsProvider {
   /// Provide the options found in [root]/[ANALYSIS_OPTIONS_FILE].
   /// Return an empty options map if the file does not exist.
-  Map<String, YamlNode> getOptions(Folder root) {
-    var optionsSource = _readAnalysisOptionsFile(
-        root.getChild(AnalysisEngine.ANALYSIS_OPTIONS_FILE));
+  Map<String, YamlNode> getOptions(Folder root, {bool crawlUp: false}) {
+    Resource resource;
+    for (Folder folder = root; folder != null; folder = folder.parent) {
+      resource = folder.getChild(AnalysisEngine.ANALYSIS_OPTIONS_FILE);
+      if (resource.exists || !crawlUp) {
+        break;
+      }
+    }
+    var optionsSource = _readAnalysisOptionsFile(resource);

[Brian Wilkerson, 2016/03/23 22:16:57]

type?

     return getOptionsFromString(optionsSource);
   }