get svn rev num even if using git svn

tools/utils.py

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This file contains a set of utilities functions used by other Python-based
 # scripts.
 
 import commands
 import os
 import platform
@@ skipping 131 matching lines @@
   else:
     return BUILD_ROOT[target_os]
 
 def GetBaseDir():
   return BASE_DIR
 
 def GetSVNRevision():
   p = subprocess.Popen(['svn', 'info'], stdout = subprocess.PIPE,
       stderr = subprocess.STDOUT, shell=IsWindows())
   output, not_used = p.communicate()
+  revision = ParseSvnInfoOutput(output)
+  if revision:
+    return revision
+
+  # maybe the builder is using git-svn, try that
+  p = subprocess.Popen(['git', 'svn', 'info'], stdout = subprocess.PIPE,
+      stderr = subprocess.STDOUT, shell=IsWindows())
+  output, not_used = p.communicate()
+  revision = ParseSvnInfoOutput(output)
+  if revision:
+    return revision
+
+  return None
+
+def ParseSvnInfoOutput(output):
   for line in output.split('\n'):
     if 'Revision' in line:
       return (line.strip().split())[1]
   return None
 
 def RewritePathSeparator(path, workspace):
   # Paths in test files are always specified using '/'
   # as the path separator. Replace with the actual
   # path separator before use.
   if ('/' in path):
@@ skipping 109 matching lines @@
 
 
 def Touch(name):
   with file(name, 'a'):
     os.utime(name, None)
 
 
 if __name__ == "__main__":
   import sys
   Main(sys.argv)