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# Copyright (C) 2009 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, see <http://www.gnu.org/licenses/>.
"""An object that maps git ref names to bzr branch names. Note that it is not
used to map git ref names to bzr tag names."""
import re
class BranchMapper(object):
_GIT_TRUNK_RE = re.compile('(?:git-)*trunk')
def git_to_bzr(self, ref_name):
"""Map a git reference name to a Bazaar branch name.
"""
parts = ref_name.split('/')
if parts[0] == 'refs':
parts.pop(0)
category = parts.pop(0)
if category == 'heads':
git_name = '/'.join(parts)
bazaar_name = self._git_to_bzr_name(git_name)
else:
if category == 'remotes' and parts[0] == 'origin':
parts.pop(0)
git_name = '/'.join(parts)
if category.endswith('s'):
category = category[:-1]
name_no_ext = self._git_to_bzr_name(git_name)
bazaar_name = "%s.%s" % (name_no_ext, category)
return bazaar_name
def _git_to_bzr_name(self, git_name):
# Make a simple name more bzr-like, by mapping git 'master' to bzr 'trunk'.
# To avoid collision, map git 'trunk' to bzr 'git-trunk'. Likewise
# 'git-trunk' to 'git-git-trunk' and so on, such that the mapping is
# one-to-one in both directions.
if git_name == 'master':
bazaar_name = 'trunk'
elif self._GIT_TRUNK_RE.match(git_name):
bazaar_name = 'git-%s' % (git_name,)
else:
bazaar_name = git_name
return bazaar_name
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