Update revision info to version info for dart2js et al.

tools/utils.py

 # Copyright (c) 2012, 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 134 matching lines @@
 
 def GetBuildRoot(host_os, mode=None, arch=None, target_os=None):
   build_root = GetBuildDir(host_os, target_os)
   if mode:
     build_root = os.path.join(build_root, GetBuildConf(mode, arch))
   return build_root
 
 def GetBaseDir():
   return BASE_DIR
 
+def GetVersion():
+  dartbin = DartBinary()
+  version_script = VersionScript()
+  p = subprocess.Popen([dartbin, version_script], stdout = subprocess.PIPE,
+      stderr = subprocess.STDOUT, shell=IsWindows())
+  output, not_used = p.communicate()
+  return output.strip()
+
 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,
@@ skipping 125 matching lines @@
   if IsCrashExitCode(exit_code):
     sys.stderr.write('Command: %s\nCRASHED with exit code %d (0x%x)\n' % (
         ' '.join(command), exit_code, exit_code & 0xffffffff))
 
 
 def Touch(name):
   with file(name, 'a'):
     os.utime(name, None)
 
 
+def VersionScript():
+  tools_dir = os.path.dirname(os.path.realpath(__file__))
+  return os.path.join(tools_dir, 'version.dart')
+
+
 def DartBinary():
   tools_dir = os.path.dirname(os.path.realpath(__file__))
   dart_binary_prefix = os.path.join(tools_dir, 'testing', 'bin')
   if IsWindows():
     return os.path.join(dart_binary_prefix, 'windows', 'dart.exe')
   else:
     return os.path.join(dart_binary_prefix, GuessOS(), 'dart')
 
 
 if __name__ == "__main__":
   import sys
   Main(sys.argv)