version.py

# Copyright: 2006 Marien Zwart <marienz@gentoo.org>
# License: BSD/GPL2


"""Version information (tied to bzr)."""

import os

__version__ = '0.3.6'

_ver = None

def get_version():
    """@returns: a string describing the snakeoil version."""
    global _ver
    if _ver is not None:
        return _ver

    try:
        from snakeoil.bzr_verinfo import version_info
    except ImportError:
        try:
            from bzrlib import branch, errors
        except ImportError:
            ver = 'unknown (not from an sdist tarball, bzr unavailable)'
        else:
            try:
                # Returns a (branch, relpath) tuple, ignore relpath.
                b = branch.Branch.open_containing(os.path.realpath(__file__))[0]
            except errors.NotBranchError:
                ver = 'unknown (not from an sdist tarball, not a bzr branch)'
            else:
                ver = '%s:%s %s' % (b.nick, b.revno(), b.last_revision())
    else:
        ver = '%(branch_nick)s:%(revno)s %(revision_id)s' % version_info

    _ver = 'snakeoil %s\n(bzr rev %s)' % (__version__, ver)

    return _ver