Move VERSION file location into top level variable

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 datetime
 import json
@@ skipping 222 matching lines @@
   'mips': 'mips',
   'simarm': 'ia32',
   'simarmv5te': 'ia32',
   'simmips': 'ia32',
   'simarm64': 'ia32',
 }
 
 ARCH_GUESS = GuessArchitecture()
 BASE_DIR = os.path.abspath(os.path.join(os.curdir, '..'))
 DART_DIR = os.path.abspath(os.path.join(__file__, '..', '..'))
+VERSION_FILE = os.path.join(DART_DIR, 'tools', 'VERSION')
 
 def GetBuildbotGSUtilPath():
   gsutil = '/b/build/scripts/slave/gsutil'
   if platform.system() == 'Windows':
     gsutil = 'e:\\\\b\\build\\scripts\\slave\\gsutil'
   return gsutil
 
 def GetBuildMode(mode):
   return BUILD_MODES[mode]
 
@@ skipping 81 matching lines @@
     key = 'USERNAME'
   return os.environ.get(key, '')
 
 def ReadVersionFile():
   def match_against(pattern, file_content):
     match = re.search(pattern, file_content, flags=re.MULTILINE)
     if match:
       return match.group(1)
     return None
 
-  version_file = os.path.join(DART_DIR, 'tools', 'VERSION')
   try:
-    fd = open(version_file)
+    fd = open(VERSION_FILE)
     content = fd.read()
     fd.close()
   except:
-    print "Warning: Couldn't read VERSION file (%s)" % version_file
+    print "Warning: Couldn't read VERSION file (%s)" % VERSION_FILE
     return None
 
   channel = match_against('^CHANNEL ([A-Za-z0-9]+)$', content)
   major = match_against('^MAJOR (\d+)$', content)
   minor = match_against('^MINOR (\d+)$', content)
   patch = match_against('^PATCH (\d+)$', content)
   prerelease = match_against('^PRERELEASE (\d+)$', content)
   prerelease_patch = match_against('^PRERELEASE_PATCH (\d+)$', content)
 
   if channel and major and minor and prerelease and prerelease_patch:
     return Version(
         channel, major, minor, patch, prerelease, prerelease_patch)
   else:
-    print "Warning: VERSION file (%s) has wrong format" % version_file
+    print "Warning: VERSION file (%s) has wrong format" % VERSION_FILE
     return None
 
 
 # Our schema for releases and archiving is based on an increasing
 # sequence of numbers. In the svn world this was simply the revision of a
 # commit, which would always give us a one to one mapping between the number
 # and the commit. This was true across branches as well, so a number used
 # to archive a build was always unique and unambiguous.
 # In git there is no such global number, so we loosen the requirement a bit.
 # We only use numbers on the master branch (bleeding edge). On branches
@@ skipping 288 matching lines @@
     os.chdir(self._working_directory)
 
   def __exit__(self, *_):
     print "Enter directory = ", self._old_cwd
     os.chdir(self._old_cwd)
 
 
 if __name__ == "__main__":
   import sys
   Main()