[NaCl SDK] Make verification failures a little easier to read.

native_client_sdk/src/build_tools/verify_filelist.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 import optparse
 import os
 import re
 import sys
 
@@ skipping 19 matching lines @@
 
 class VerifyException(Exception):
   pass
 
 class Rules(object):
   def __init__(self, platform, filename, contents=None):
     self.glob_prefixes = []
     self.exact_filenames = set()
     self.filename = filename
     self.platform = platform
+    self.exe_ext = '.exe' if platform == 'win' else ''
 
     if platform not in VALID_PLATFORMS:
       raise ParseException(self.filename, 1, 'Unknown platform %s' % platform)
 
     if not contents:
       with open(filename) as f:
         contents = f.read()
 
     for line_no, rule in enumerate(contents.split('\n')):
       rule = rule.strip()
@@ skipping 10 matching lines @@
         msg = 'Unknown platform(s) %s.' % (
             ', '.join('"%s"' % platform for platform in unknown_platforms))
         raise ParseException(self.filename, line_no, msg)
       if self.platform not in platforms:
         return
 
       # If this platform is included, strip the [...] part.
       pattern = match.group(2)
 
     pattern = pattern.replace('${PLATFORM}', self.platform)
+    pattern = pattern.replace('${EXE_EXT}', self.exe_ext)
 
     if '*' in pattern:
       # glob pattern
       # We only support * at the end.
       if pattern.find('*') != len(pattern) - 1:
         msg = '* is only allowed at the end of the line.'
         raise ParseException(self.filename, line_no, msg)
 
       # Remove the *
       pattern = pattern[:-1]
@@ skipping 87 matching lines @@
     print >> sys.stderr, 'Error parsing rules:\n', e
     return 1
   except VerifyException, e:
     print >> sys.stderr, 'Error verifying file list:\n', e
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))