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# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
#
# 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 dulwich.objects import (
Blob,
Tree,
)
import stat
from bzrlib import (
errors,
ui,
)
from bzrlib.plugins.git.mapping import (
inventory_to_tree_and_blobs,
mapping_registry,
revision_to_commit,
)
from bzrlib.plugins.git.shamap import (
SqliteGitShaMap,
)
class BazaarObjectStore(object):
"""A Git-style object store backed onto a Bazaar repository."""
def __init__(self, repository, mapping=None):
self.repository = repository
if mapping is None:
self.mapping = self.repository.get_mapping()
else:
self.mapping = mapping
self._idmap = SqliteGitShaMap(self.repository._transport)
def _update_sha_map(self):
all_revids = self.repository.all_revision_ids()
graph = self.repository.get_graph()
present_revids = set(self._idmap.revids())
pb = ui.ui_factory.nested_progress_bar()
try:
for i, revid in enumerate(graph.iter_topo_order(all_revids)):
if revid in present_revids:
continue
pb.update("updating git map", i, len(all_revids))
self._update_sha_map_revision(revid)
finally:
self._idmap.commit()
pb.finished()
def _update_sha_map_revision(self, revid):
inv = self.repository.get_inventory(revid)
objects = inventory_to_tree_and_blobs(self.repository, self.mapping,
revid)
for sha, o, path in objects:
if path == "":
tree_sha = sha
ie = inv[inv.path2id(path)]
if ie.kind in ("file", "symlink"):
self._idmap.add_entry(sha, "blob", (ie.file_id, ie.revision))
elif ie.kind == "directory":
self._idmap.add_entry(sha, "tree", (path, ie.revision))
else:
raise AssertionError()
rev = self.repository.get_revision(revid)
commit_obj = revision_to_commit(rev, tree_sha,
self._idmap._parent_lookup)
try:
foreign_revid, mapping = mapping_registry.parse_revision_id(revid)
except errors.InvalidRevisionId:
pass
else:
if foreign_revid != commit_obj.id:
raise AssertionError("recreated git commit had different sha1: expected %s, got %s" % (foreign_revid, commit_obj.id))
self._idmap.add_entry(commit_obj.id, "commit", (revid, tree_sha))
def _get_blob(self, fileid, revision):
"""Return a Git Blob object from a fileid and revision stored in bzr.
:param fileid: File id of the text
:param revision: Revision of the text
"""
text = self.repository.texts.get_record_stream([(fileid, revision)],
"unordered", True).next().get_bytes_as("fulltext")
blob = Blob()
blob._text = text
return blob
def _get_tree(self, path, revid, inv=None):
"""Return a Git Tree object from a path and a revision stored in bzr.
:param path: path in the tree.
:param revision: Revision of the tree.
"""
if inv is None:
inv = self.repository.get_inventory(revid)
tree = Tree()
fileid = inv.path2id(path)
for name, ie in inv[fileid].children.iteritems():
if ie.kind == "directory":
subtree = self._get_tree(inv.id2path(ie.file_id), revid, inv)
tree.add(stat.S_IFDIR, name.encode('UTF-8'), subtree.id)
elif ie.kind == "file":
blob = self._get_blob(ie.file_id, ie.revision)
mode = stat.S_IFREG | 0644
if ie.executable:
mode |= 0111
tree.add(mode, name.encode('UTF-8'), blob.id)
elif ie.kind == "symlink":
raise AssertionError("Symlinks not yet supported")
tree.serialize()
return tree
def _get_commit(self, revid, tree_sha):
rev = self.repository.get_revision(revid)
return revision_to_commit(rev, tree_sha, self._idmap._parent_lookup)
def get_raw(self, sha):
obj = self[sha]
assert obj.id == sha
return obj._text
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 == "commit":
return self._get_commit(*type_data)
elif type == "blob":
return self._get_blob(*type_data)
elif type == "tree":
return self._get_tree(*type_data)
else:
raise AssertionError("Unknown object type '%s'" % type)
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