/brz/remove-bazaar

# Copyright (C) 2007 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Library API versioning support."""

import bzrlib

from bzrlib.lazy_import import lazy_import

lazy_import(globals(), """

from bzrlib.errors import IncompatibleAPI

""")

def get_current_api_version(object_with_api):

    """Return the API version tuple for object_with_api.

    :param object_with_api: An object to look for an API version on. If the

        object has a api_current_version attribute, that is used. Otherwise if

        there is a version_info attribute, its first three elements are used.

        Finally if there was no version_info attribute, the current api version

        of bzrlib itself is used.

    """

    try:

        return object_with_api.api_current_version

    except AttributeError:

        try:

            return object_with_api.version_info[0:3]

        except AttributeError:

            return get_current_api_version(bzrlib)

def get_minimum_api_version(object_with_api):

    """Return the minimum API version supported by object_with_api.

    :param object_with_api: An object to look for an API version on. If the

        object has a api_minimum_version attribute, that is used. Otherwise the

        minimum api version of bzrlib itself is used.

    """

    try:

        return object_with_api.api_minimum_version

    except AttributeError:

        return get_minimum_api_version(bzrlib)