Synnefo » snf-ganeti

# Format for CONFIG_VERSION:

#   01 03 0123 = 01030123

#   ^^ ^^ ^^^^

#   |  |  + Configuration version/revision

#   |  + Minor version

#   + Major version

#

# It is stored as an integer. Make sure not to write an octal number.

# BuildVersion and SplitVersion must be in here because we can't import other

# modules. The cfgupgrade tool must be able to read and write version numbers

# and thus requires these functions. To avoid code duplication, they're kept in

# here.

def BuildVersion(major, minor, revision):

  """Calculates int version number from major, minor and revision numbers.

  Returns: int representing version number

  """

  assert isinstance(major, int)

  assert isinstance(minor, int)

  assert isinstance(revision, int)

  return (1000000 * major +

            10000 * minor +

                1 * revision)

def SplitVersion(version):

  """Splits version number stored in an int.

  Returns: tuple; (major, minor, revision)

  """

  assert isinstance(version, int)

  (major, remainder) = divmod(version, 1000000)

  (minor, revision) = divmod(remainder, 10000)

  return (major, minor, revision)