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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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Map from Git sha's to Bazaar objects."""
from bzrlib.errors import NoSuchRevision
class GitObjectConverter(object):
def __init__(self, repository, mapping=None):
self.repository = repository
if mapping is None:
self.mapping = self.repository.get_mapping()
else:
self.mapping = mapping
def __getitem__(self, sha):
# Commit
revid = self.mapping.revision_id_foreign_to_bzr(sha)
try:
rev = self.repository.get_revision(revid)
except NoSuchRevision:
pass
else:
return reconstruct_git_commit(rev)
# TODO: Yeah, this won't scale, but the only alternative is a
# custom map..
for (fileid, revision) in self.repository.texts.keys():
blob = self._get_blob(
print revision
class GitShaMap(object):
def __init__(self, transport):
self.transport = transport
def add_entry(self, sha, type, type_data):
"""Add a new entry to the database.
"""
raise NotImplementedError(self.add_entry)
def lookup_git_sha(self, sha):
"""Lookup a Git sha in the database.
:param sha: Git object sha
:return: (type, type_data) with type_data:
revision: revid, tree sha
"""
raise NotImplementedError(self.lookup_git_sha)
class MappedGitObjectConverter(GitObjectConverter):
def __init__(self, repository):
self.repository = repository
self._idmap = GitShaMap(self.repository._transport)
def _update_sha_map(self):
# TODO: Check which
raise NotImplementedError(self._update_sha_map)
def __getitem__(self, sha):
# See if sha is in map
try:
(type, type_data) = self._idmap.lookup_git_sha(sha)
except KeyError:
# if not, see if there are any unconverted revisions and add them
# to the map, search for sha in map again
self._update_sha_map()
(type, type_data) = self._idmap.lookup_git_sha(sha)
# convert object to git object
if type == "revision":
return self._get_commit(*type_data)
else:
raise AssertionError("Unknown object type '%s'" % type)
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