1
# Copyright (C) 2007 Canonical Ltd
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
"""An adapter between a Git Repository and a Bazaar Branch"""
35
from bzrlib.foreign import (
39
from bzrlib.trace import mutter
40
from bzrlib.transport import get_transport
42
from bzrlib.plugins.git.foreign import (
45
from bzrlib.plugins.git.mapping import default_mapping
47
from bzrlib.plugins.git import git
50
class GitTags(object):
52
def __init__(self, tags):
56
return iter(self._tags)
59
class GitRepository(ForeignRepository):
60
"""An adapter to git repositories for bzr."""
64
def __init__(self, gitdir, lockfiles):
65
ForeignRepository.__init__(self, GitFormat(), gitdir, lockfiles)
66
from bzrlib.plugins.git import fetch
67
repository.InterRepository.register_optimiser(fetch.InterGitRepository)
72
def supports_rich_root(self):
75
def _warn_if_deprecated(self):
76
# This class isn't deprecated
79
def get_mapping(self):
80
return default_mapping
82
def make_working_trees(self):
86
class LocalGitRepository(GitRepository):
88
def __init__(self, gitdir, lockfiles):
89
# FIXME: This also caches negatives. Need to be more careful
90
# about this once we start writing to git
91
self._parents_provider = graph.CachingParentsProvider(self)
92
GitRepository.__init__(self, gitdir, lockfiles)
93
self.base = gitdir.root_transport.base
94
self._git = gitdir._git
96
self.signatures = versionedfiles.VirtualSignatureTexts(self)
97
self.revisions = versionedfiles.VirtualRevisionTexts(self)
98
self.tags = GitTags(self._git.get_tags())
100
def all_revision_ids(self):
101
ret = set([revision.NULL_REVISION])
102
if self._git.heads() == []:
104
bzr_heads = [self.get_mapping().revision_id_foreign_to_bzr(h) for h in self._git.heads()]
106
graph = self.get_graph()
107
for rev, parents in graph.iter_ancestry(bzr_heads):
111
#def get_revision_delta(self, revision_id):
112
# parent_revid = self.get_revision(revision_id).parent_ids[0]
113
# diff = self._git.diff(ids.convert_revision_id_bzr_to_git(parent_revid),
114
# ids.convert_revision_id_bzr_to_git(revision_id))
116
def _make_parents_provider(self):
117
"""See Repository._make_parents_provider()."""
118
return self._parents_provider
120
def get_parent_map(self, revids):
122
mutter("get_parent_map(%r)", revids)
123
for revision_id in revids:
124
assert isinstance(revision_id, str)
125
if revision_id == revision.NULL_REVISION:
126
parent_map[revision_id] = ()
128
hexsha = self.lookup_git_revid(revision_id, self.get_mapping())
129
commit = self._git.commit(hexsha)
133
parent_map[revision_id] = [self.get_mapping().revision_id_foreign_to_bzr(p) for p in commit.parents]
136
def get_ancestry(self, revision_id, topo_sorted=True):
137
"""See Repository.get_ancestry().
139
if revision_id is None:
140
return self._all_revision_ids()
141
assert isinstance(revision_id, str)
143
graph = self.get_graph()
144
for rev, parents in graph.iter_ancestry([revision_id]):
145
if rev == revision.NULL_REVISION:
151
def get_signature_text(self, revision_id):
152
raise errors.NoSuchRevision(self, revision_id)
154
def lookup_revision_id(self, revid):
155
"""Lookup a revision id.
157
:param revid: Bazaar revision id.
158
:return: Tuple with git revisionid and mapping.
160
# Yes, this doesn't really work, but good enough as a stub
161
return osutils.sha(rev_id).hexdigest(), self.get_mapping()
163
def has_signature_for_revision_id(self, revision_id):
166
def lookup_git_revid(self, bzr_revid, mapping):
168
return mapping.revision_id_bzr_to_foreign(bzr_revid)
169
except errors.InvalidRevisionId:
170
raise errors.NoSuchRevision(self, bzr_revid)
172
def get_revision(self, revision_id):
173
git_commit_id = self.lookup_git_revid(revision_id, self.get_mapping())
175
commit = self._git.commit(git_commit_id)
177
raise errors.NoSuchRevision(self, revision_id)
178
# print "fetched revision:", git_commit_id
179
revision = self._parse_rev(commit, self.get_mapping())
180
assert revision is not None
183
def has_revision(self, revision_id):
185
self.get_revision(revision_id)
186
except errors.NoSuchRevision:
191
def get_revisions(self, revids):
192
return [self.get_revision(r) for r in revids]
195
def _parse_rev(klass, commit, mapping):
196
"""Convert a git commit to a bzr revision.
198
:return: a `bzrlib.revision.Revision` object.
201
raise AssertionError("Commit object can't be None")
202
rev = ForeignRevision(commit.id, mapping, mapping.revision_id_foreign_to_bzr(commit.id))
203
rev.parent_ids = tuple([mapping.revision_id_foreign_to_bzr(p) for p in commit.parents])
204
rev.message = commit.message.decode("utf-8", "replace")
205
rev.committer = str(commit.committer).decode("utf-8", "replace")
206
if commit.committer != commit.author:
207
rev.properties['author'] = str(commit.author).decode("utf-8", "replace")
208
rev.timestamp = commit.commit_time
212
def revision_trees(self, revids):
214
yield self.revision_tree(revid)
216
def revision_tree(self, revision_id):
217
revision_id = revision.ensure_null(revision_id)
219
if revision_id == revision.NULL_REVISION:
220
inv = inventory.Inventory(root_id=None)
221
inv.revision_id = revision_id
222
return revisiontree.RevisionTree(self, inv, revision_id)
224
return GitRevisionTree(self, revision_id)
226
def get_inventory(self, revision_id):
227
assert revision_id != None
228
return self.revision_tree(revision_id).inventory
230
def set_make_working_trees(self, trees):
233
def fetch_objects(self, determine_wants, graph_walker, progress=None):
234
return self._git.fetch_objects(determine_wants, graph_walker, progress)
237
def escape_file_id(file_id):
238
return file_id.replace('_', '__').replace(' ', '_s')
241
def unescape_file_id(file_id):
242
return file_id.replace("_s", " ").replace("__", "_")
245
class GitRevisionTree(revisiontree.RevisionTree):
247
def __init__(self, repository, revision_id):
248
self._repository = repository
249
self.revision_id = revision_id
250
git_id = repository.lookup_git_revid(revision_id, repository.get_mapping())
251
self.tree = repository._git.commit(git_id).tree
252
self._inventory = inventory.Inventory(revision_id=revision_id)
253
self._inventory.root.revision = revision_id
254
self._build_inventory(self.tree, self._inventory.root, "")
256
def get_revision_id(self):
257
return self.revision_id
259
def get_file_text(self, file_id):
260
entry = self._inventory[file_id]
261
if entry.kind == 'directory': return ""
262
return self._repository._git.get_blob(entry.text_id).data
264
def _build_inventory(self, tree_id, ie, path):
265
assert isinstance(path, str)
266
tree = self._repository._git.tree(tree_id)
267
for mode, name, hexsha in tree.entries():
268
basename = name.decode("utf-8")
272
child_path = urlutils.join(path, name)
273
file_id = escape_file_id(child_path.encode('utf-8'))
274
entry_kind = (mode & 0700000) / 0100000
276
child_ie = inventory.InventoryDirectory(file_id, basename, ie.file_id)
277
elif entry_kind == 1:
278
file_kind = (mode & 070000) / 010000
279
b = self._repository._git.get_blob(hexsha)
281
child_ie = inventory.InventoryFile(file_id, basename, ie.file_id)
282
child_ie.text_sha1 = osutils.sha_string(b.data)
284
child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)
285
child_ie.text_sha1 = osutils.sha_string("")
287
raise AssertionError(
288
"Unknown file kind, perms=%o." % (mode,))
289
child_ie.text_id = b.id
290
child_ie.text_size = len(b.data)
292
raise AssertionError(
293
"Unknown blob kind, perms=%r." % (mode,))
294
fs_mode = mode & 0777
295
child_ie.executable = bool(fs_mode & 0111)
296
child_ie.revision = self.revision_id
297
self._inventory.add(child_ie)
299
self._build_inventory(hexsha, child_ie, child_path)
302
class GitFormat(object):
304
supports_tree_reference = False
305
rich_root_data = True
307
def get_format_description(self):
308
return "Git Repository"
310
def initialize(self, url, shared=False, _internal=False):
311
raise bzr_errors.UninitializableFormat(self)
313
def check_conversion_target(self, target_repo_format):
314
return target_repo_format.rich_root_data