cleanup --batch-mode sourceFiles

pkg/analyzer_cli/lib/src/build_mode.dart

Index: pkg/analyzer_cli/lib/src/build_mode.dart
diff --git a/pkg/analyzer_cli/lib/src/build_mode.dart b/pkg/analyzer_cli/lib/src/build_mode.dart
index ba19d8cc0a7666099380ad2a7168d19313fa3d2a..b68476b8b1a2c7d9d39d70c0612449e657d428dd 100644
--- a/pkg/analyzer_cli/lib/src/build_mode.dart
+++ b/pkg/analyzer_cli/lib/src/build_mode.dart
@@ -159,6 +159,15 @@ class BuildMode {
       return ErrorSeverity.ERROR;
     }
 
+    // BuildMode expects sourceFiles in the format "<uri>|<filepath>",
+    // but the rest of the code base does not understand this format.
+    // Rewrite sourceFiles, stripping the "<uri>|" prefix, so that it
+    // does not cause problems with code that does not expect this format.
+    options.rewriteSourceFiles(options.sourceFiles
+        .map((String uriPipePath) =>
+            uriPipePath.substring(uriPipePath.indexOf('|') + 1))
+        .toList());
+
     // Prepare the analysis context.
     _createContext();