1
# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""Map from Git sha's to Bazaar objects."""
19
from dulwich.objects import (
30
from bzrlib.plugins.git.mapping import (
35
from bzrlib.plugins.git.shamap import (
40
class BazaarObjectStore(object):
41
"""A Git-style object store backed onto a Bazaar repository."""
43
def __init__(self, repository, mapping=None):
44
self.repository = repository
46
self.mapping = self.repository.get_mapping()
48
self.mapping = mapping
49
self._idmap = SqliteGitShaMap(self.repository._transport)
51
def _update_sha_map(self):
52
all_revids = self.repository.all_revision_ids()
53
graph = self.repository.get_graph()
54
present_revids = set(self._idmap.revids())
55
missing_revids = [revid for revid in graph.iter_topo_order(all_revids) if revid not in present_revids]
56
pb = ui.ui_factory.nested_progress_bar()
58
for i, revid in enumerate(missing_revids):
59
pb.update("updating git map", i, len(missing_revids))
60
self._update_sha_map_revision(revid)
65
def _update_sha_map_revision(self, revid):
66
inv = self.repository.get_inventory(revid)
67
tree_sha = self._get_ie_sha1(inv.root, inv)
68
rev = self.repository.get_revision(revid)
69
commit_obj = revision_to_commit(rev, tree_sha,
70
self._idmap._parent_lookup)
72
foreign_revid, mapping = mapping_registry.parse_revision_id(revid)
73
except errors.InvalidRevisionId:
76
if foreign_revid != commit_obj.id:
77
raise AssertionError("recreated git commit had different sha1: expected %s, got %s" % (foreign_revid, commit_obj.id))
78
self._idmap.add_entry(commit_obj.id, "commit", (revid, tree_sha))
80
def _check_expected_sha(self, expected_sha, object):
81
if expected_sha is None:
83
if expected_sha != object.id:
84
raise AssertionError("Invalid sha for %r: %s" % (object, expected_sha))
86
def _get_ie_sha1(self, entry, inv):
87
if entry.kind == "directory":
89
ret = self._idmap.lookup_tree(entry.file_id, inv.revision_id)
91
ret = self._get_tree(entry.file_id, inv.revision_id,
93
self._idmap.add_entry(ret, "tree", (entry.file_id, inv.revision_id))
97
return self._idmap.lookup_blob(entry.file_id, entry.revision)
99
ret = self._get_blob(entry.file_id, entry.revision).id
100
self._idmap.add_entry(ret, "blob", (entry.file_id, entry.revision))
103
def _get_blob(self, fileid, revision, expected_sha=None):
104
"""Return a Git Blob object from a fileid and revision stored in bzr.
106
:param fileid: File id of the text
107
:param revision: Revision of the text
109
text = self.repository.texts.get_record_stream([(fileid, revision)],
110
"unordered", True).next().get_bytes_as("fulltext")
113
self._check_expected_sha(expected_sha, blob)
116
def _get_tree(self, fileid, revid, inv=None, expected_sha=None):
117
"""Return a Git Tree object from a file id and a revision stored in bzr.
119
:param fileid: fileid in the tree.
120
:param revision: Revision of the tree.
123
inv = self.repository.get_inventory(revid)
124
tree = directory_to_tree(inv[fileid], lambda ie: self._get_ie_sha1(ie, inv))
125
self._check_expected_sha(expected_sha, tree)
128
def _get_commit(self, revid, tree_sha, expected_sha=None):
129
rev = self.repository.get_revision(revid)
130
commit = revision_to_commit(rev, tree_sha, self._idmap._parent_lookup)
131
self._check_expected_sha(expected_sha, commit)
134
def get_raw(self, sha):
135
return self[sha]._text
137
def __getitem__(self, sha):
138
# See if sha is in map
140
(type, type_data) = self._idmap.lookup_git_sha(sha)
142
# if not, see if there are any unconverted revisions and add them
143
# to the map, search for sha in map again
144
self._update_sha_map()
145
(type, type_data) = self._idmap.lookup_git_sha(sha)
146
# convert object to git object
148
return self._get_commit(type_data[0], type_data[1],
151
return self._get_blob(type_data[0], type_data[1], expected_sha=sha)
153
return self._get_tree(type_data[0], type_data[1], expected_sha=sha)
155
raise AssertionError("Unknown object type '%s'" % type)