Issue 27375. Use ContextBuilder to find analysis options file in analyzer_cli.

pkg/analyzer_cli/lib/src/driver.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_cli.src.driver;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io' as io;
 
@@ skipping 726 matching lines @@
       CommandLineOptions options) {
     file_system.File file;
     String filePath = options.analysisOptionsFile;
     if (filePath != null) {
       file = resourceProvider.getFile(filePath);
       if (!file.exists) {
         printAndFail('Options file not found: $filePath',
             exitCode: ErrorSeverity.ERROR.ordinal);
       }
     } else {
-      filePath = AnalysisEngine.ANALYSIS_OPTIONS_FILE;
-      file = resourceProvider.getFile(filePath);
-      if (!file.exists) {
-        filePath = AnalysisEngine.ANALYSIS_OPTIONS_YAML_FILE;
-        file = resourceProvider.getFile(filePath);
-      }
+      return new ContextBuilder(resourceProvider, null, null)
+          .getOptionsFile(options.sourceFiles.first);

[Brian Wilkerson, 2016/09/22 22:01:20]

I'm not sure how this works. The method getOptionsFile is expecting the path to
a directory, not a file, but sourceFiles can be paths to files.

Also, don't we potentially need to get a different set of options for each file?
(I know this second issue is a bigger issue than this CL, so I'm not asking you
to fix it, just confirming that the first element in the list won't necessarily
be in the same context as every other item.)

     }
     return file;
   }
 
   /// Convert [sourcePath] into an absolute path.
   static String _normalizeSourcePath(String sourcePath) =>
       path.normalize(new io.File(sourcePath).absolute.path);
 
   static void _processAnalysisOptions(
       file_system.ResourceProvider resourceProvider,
@@ skipping 110 matching lines @@
     for (var package in packages) {
       var packageName = path.basename(package.path);
       var realPath = package.resolveSymbolicLinksSync();
       result[packageName] = [
         PhysicalResourceProvider.INSTANCE.getFolder(realPath)
       ];
     }
     return result;
   }
 }