grit: Ignore empty file paths when generating input file list

grit/node/misc.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Miscellaneous node types.
 """
 
 import os.path
 import re
@@ skipping 313 matching lines @@
     input_files = set()
     old_output_language = self.output_language
     for lang, ctx, fallback in self.GetConfigurations():
       self.SetOutputLanguage(lang or self.GetSourceLanguage())
       self.SetOutputContext(ctx)
       self.SetFallbackToDefaultLayout(fallback)
 
       for node in self.ActiveDescendants():
         if isinstance(node, (io.FileNode, include.IncludeNode, misc.PartNode,
                              structure.StructureNode, variant.SkeletonNode)):
-          input_files.add(node.GetInputPath())
+          input_path = node.GetInputPath()
+          if input_path is not None:
+            input_files.add(input_path)
     self.SetOutputLanguage(old_output_language)
     return sorted(map(self.ToRealPath, input_files))
 
   def GetFirstIdsFile(self):
     """Returns a usable path to the first_ids file, if set, otherwise
     returns None.
 
     The first_ids_file attribute is by default relative to the
     base_dir of the .grd file, but may be prefixed by GRIT_DIR/,
     which makes it relative to the directory of grit.py
@@ skipping 188 matching lines @@
     by parameters of the same name.
     """
     node = IdentifierNode()
     node.StartParsing('identifier', parent)
     node.HandleAttribute('name', name)
     node.HandleAttribute('id', id)
     node.HandleAttribute('comment', comment)
     node.HandleAttribute('systemid', systemid)
     node.EndParsing()
     return node