old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """
  Created by René Meusel
  This file is part of the CernVM File System auxiliary tools.
  """
  
  from root_file    import IncompleteRootFileSignature
  from manifest     import *
  from whitelist    import *
  from certificate  import *
  from repository   import *
  from availability import *
  from _common      import _split_md5
  from _common      import _combine_md5
  
  import subprocess
  import re
  
  class ServerNotInstalled(Exception):
      pass
  
  class ClientNotInstalled(Exception):
      pass
  
  class VersionNotDetected(Exception):
      def __init__(self, input_string):
          self.input_string = input_string
  
  
  def __extract_version_string(input_str):
      match = re.search('.*([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*).*', input_str)
      if not match or len(match.groups()) != 1:
          raise VersionNotDetected(input_str)
      return match.groups()[0]
  
  
  def check_output(popen_args):
      """ instead of using subprocess.check_output that was
          introduced with python 2.7                        """
      return subprocess.Popen(popen_args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT).communicate()[0]
  
  
  def _get_server_version():
      output = ''
      try:
          output = check_output(['cvmfs_server'])
          return __extract_version_string(output)
      except OSError, e:
          raise ServerNotInstalled()
  
  
  def _get_client_version():
      output = ''
      try:
          output = check_output(['cvmfs2', '--version'])
      except OSError, e:
          raise ClientNotInstalled()
      return __extract_version_string(output)
  
  
  has_server = True
  has_client = True
  server_version = None
  client_version = None
  
  
  try:
      server_version = _get_server_version()
  except (ServerNotInstalled, VersionNotDetected) as e:
      has_server = False
  
  try:
      client_version = _get_client_version()
  except ClientNotInstalled, e:
      has_client = False
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """
  Created by René Meusel
  This file is part of the CernVM File System auxiliary tools.
  """
  
  from root_file    import IncompleteRootFileSignature
  from manifest     import *
  from whitelist    import *
  from certificate  import *
  from repository   import *
  from availability import *
  from _common      import _split_md5
  from _common      import _combine_md5
  
  import subprocess
  import re
  
  version     = "0.1.0"
  __version__ = version
  
  class ServerNotInstalled(Exception):
      pass
  
  class ClientNotInstalled(Exception):
      pass
  
  class VersionNotDetected(Exception):
      def __init__(self, input_string):
          self.input_string = input_string
  
  
  def __extract_version_string(input_str):
      match = re.search('.*([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*).*', input_str)
      if not match or len(match.groups()) != 1:
          raise VersionNotDetected(input_str)
      return match.groups()[0]
  
  
  def check_output(popen_args):
      """ instead of using subprocess.check_output that was
          introduced with python 2.7                        """
      return subprocess.Popen(popen_args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT).communicate()[0]
  
  
  def _get_server_version():
      output = ''
      try:
          output = check_output(['cvmfs_server'])
          return __extract_version_string(output)
      except OSError, e:
          raise ServerNotInstalled()
  
  
  def _get_client_version():
      output = ''
      try:
          output = check_output(['cvmfs2', '--version'])
      except OSError, e:
          raise ClientNotInstalled()
      return __extract_version_string(output)
  
  
  has_server = True
  has_client = True
  server_version = None
  client_version = None
  
  
  try:
      server_version = _get_server_version()
  except (ServerNotInstalled, VersionNotDetected) as e:
      has_server = False
  
  try:
      client_version = _get_client_version()
  except ClientNotInstalled, e:
      has_client = False
  
subject: add version number