Raises an exception when an unexpected </if> occurs

grit/format/html_inline.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.
 
 """Flattens a HTML file by inlining its external resources.
 
 This is a small script that takes a HTML file, looks for src attributes
 and inlines the specified file, producing one HTML file with no external
 dependencies. It recursively inlines the included files.
@@ skipping 166 matching lines @@
 
   def IsConditionSatisfied(src_match):
     expression = src_match.group('expression')
     return grd_node is None or grd_node.EvaluateCondition(expression)
 
   def CheckConditionalElements(str):
     """Helper function to conditionally inline inner elements"""
     while True:
       begin_if = _BEGIN_IF_BLOCK.search(str)
       if begin_if is None:
+        if _END_IF_BLOCK.search(str) is not None:
+          raise Exception('Unexpected </if>')

[Nico, 2015/03/26 17:58:56]

Should this be 'Unmatched </if>' to match the similar message a few lines down?

         return str
 
       condition_satisfied = IsConditionSatisfied(begin_if)
       leading = str[0:begin_if.start()]
       content_start = begin_if.end()
 
       # Find matching "if" block end.
       count = 1
       pos = begin_if.end()
       while True:
@@ skipping 215 matching lines @@
 
 def main():
   if len(sys.argv) <= 2:
     print "Flattens a HTML file by inlining its external resources.\n"
     print "html_inline.py inputfile outputfile"
   else:
     InlineToFile(sys.argv[1], sys.argv[2], None)
 
 if __name__ == '__main__':
   main()