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

pkg/analyzer_cli/lib/src/driver.dart

Index: pkg/analyzer_cli/lib/src/driver.dart
diff --git a/pkg/analyzer_cli/lib/src/driver.dart b/pkg/analyzer_cli/lib/src/driver.dart
index ec779a7eb8dda662d1fdfe4fb65c148d403fe406..9e32cf0d951015241c42ad50e8f87bdbd0db9a51 100644
--- a/pkg/analyzer_cli/lib/src/driver.dart
+++ b/pkg/analyzer_cli/lib/src/driver.dart
@@ -744,12 +744,8 @@ class Driver implements CommandLineStarter {
             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;
   }