1
# Copyright (C) 2008-2010 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
from dulwich.objects import (
23
from dulwich.object_store import (
26
from itertools import (
39
from bzrlib.errors import (
43
from bzrlib.inventory import (
50
from bzrlib.repository import (
53
from bzrlib.revision import (
56
from bzrlib.revisiontree import (
59
from bzrlib.tsort import (
62
from bzrlib.versionedfile import (
63
ChunkedContentFactory,
66
from bzrlib.plugins.git.mapping import (
72
from bzrlib.plugins.git.object_store import (
77
from bzrlib.plugins.git.remote import (
80
from bzrlib.plugins.git.repository import (
87
def import_git_blob(texts, mapping, path, name, (base_hexsha, hexsha),
88
base_inv, parent_id, revision_id,
89
parent_invs, lookup_object, (base_mode, mode), store_updater,
91
"""Import a git blob object into a bzr repository.
93
:param texts: VersionedFiles to add to
94
:param path: Path in the tree
95
:param blob: A git blob
96
:return: Inventory delta for this file
98
if mapping.is_control_file(path):
100
if base_hexsha == hexsha and base_mode == mode:
101
# If nothing has changed since the base revision, we're done
103
file_id = lookup_file_id(path)
104
if stat.S_ISLNK(mode):
108
ie = cls(file_id, name.decode("utf-8"), parent_id)
109
ie.executable = mode_is_executable(mode)
110
if base_hexsha == hexsha and mode_kind(base_mode) == mode_kind(mode):
111
base_ie = base_inv[base_inv.path2id(path)]
112
ie.text_size = base_ie.text_size
113
ie.text_sha1 = base_ie.text_sha1
114
ie.symlink_target = base_ie.symlink_target
115
if ie.executable == base_ie.executable:
116
ie.revision = base_ie.revision
118
blob = lookup_object(hexsha)
120
blob = lookup_object(hexsha)
121
if ie.kind == "symlink":
123
ie.symlink_target = blob.data
127
ie.text_size = sum(imap(len, blob.chunked))
128
ie.text_sha1 = osutils.sha_strings(blob.chunked)
129
# Check what revision we should store
131
for pinv in parent_invs:
136
if (pie.text_sha1 == ie.text_sha1 and
137
pie.executable == ie.executable and
138
pie.symlink_target == ie.symlink_target):
139
# found a revision in one of the parents to use
140
ie.revision = pie.revision
142
parent_key = (file_id, pie.revision)
143
if not parent_key in parent_keys:
144
parent_keys.append(parent_key)
145
if ie.revision is None:
146
# Need to store a new revision
147
ie.revision = revision_id
148
assert ie.revision is not None
149
if ie.kind == 'symlink':
152
chunks = blob.chunked
153
texts.insert_record_stream([
154
ChunkedContentFactory((file_id, ie.revision),
155
tuple(parent_keys), ie.text_sha1, chunks)])
157
if base_hexsha is not None:
158
old_path = path.decode("utf-8") # Renames are not supported yet
159
if stat.S_ISDIR(base_mode):
160
invdelta.extend(remove_disappeared_children(base_inv, old_path,
161
lookup_object(base_hexsha), [], lookup_object))
164
new_path = path.decode("utf-8")
165
invdelta.append((old_path, new_path, file_id, ie))
166
if base_hexsha != hexsha:
167
store_updater.add_object(blob, ie, path)
171
class SubmodulesRequireSubtrees(BzrError):
172
_fmt = """The repository you are fetching from contains submodules. To continue, upgrade your Bazaar repository to a format that supports nested trees, such as 'development-subtree'."""
176
def import_git_submodule(texts, mapping, path, name, (base_hexsha, hexsha),
177
base_inv, parent_id, revision_id, parent_invs, lookup_object,
178
(base_mode, mode), store_updater, lookup_file_id):
179
if base_hexsha == hexsha and base_mode == mode:
181
file_id = lookup_file_id(path)
182
ie = TreeReference(file_id, name.decode("utf-8"), parent_id)
183
ie.revision = revision_id
184
if base_hexsha is None:
188
ie.reference_revision = mapping.revision_id_foreign_to_bzr(hexsha)
189
texts.insert_record_stream([
190
ChunkedContentFactory((file_id, ie.revision), (), None, [])])
191
invdelta = [(oldpath, path, file_id, ie)]
195
def remove_disappeared_children(base_inv, path, base_tree, existing_children,
197
"""Generate an inventory delta for removed children.
199
:param base_inv: Base inventory against which to generate the
201
:param path: Path to process (unicode)
202
:param base_tree: Git Tree base object
203
:param existing_children: Children that still exist
204
:param lookup_object: Lookup a git object by its SHA1
205
:return: Inventory delta, as list
207
assert type(path) is unicode
209
for name, mode, hexsha in base_tree.iteritems():
210
if name in existing_children:
212
c_path = posixpath.join(path, name.decode("utf-8"))
213
file_id = base_inv.path2id(c_path)
214
assert file_id is not None
215
ret.append((c_path, None, file_id, None))
216
if stat.S_ISDIR(mode):
217
ret.extend(remove_disappeared_children(
218
base_inv, c_path, lookup_object(hexsha), [], lookup_object))
222
def import_git_tree(texts, mapping, path, name, (base_hexsha, hexsha),
223
base_inv, parent_id, revision_id, parent_invs,
224
lookup_object, (base_mode, mode), store_updater,
225
lookup_file_id, allow_submodules=False):
226
"""Import a git tree object into a bzr repository.
228
:param texts: VersionedFiles object to add to
229
:param path: Path in the tree (str)
230
:param name: Name of the tree (str)
231
:param tree: A git tree object
232
:param base_inv: Base inventory against which to return inventory delta
233
:return: Inventory delta for this subtree
235
assert type(path) is str
236
assert type(name) is str
237
if base_hexsha == hexsha and base_mode == mode:
238
# If nothing has changed since the base revision, we're done
241
file_id = lookup_file_id(path)
242
# We just have to hope this is indeed utf-8:
243
ie = InventoryDirectory(file_id, name.decode("utf-8"), parent_id)
244
tree = lookup_object(hexsha)
245
if base_hexsha is None:
247
old_path = None # Newly appeared here
249
base_tree = lookup_object(base_hexsha)
250
old_path = path.decode("utf-8") # Renames aren't supported yet
251
new_path = path.decode("utf-8")
252
if base_tree is None or type(base_tree) is not Tree:
253
ie.revision = revision_id
254
invdelta.append((old_path, new_path, ie.file_id, ie))
255
texts.insert_record_stream([
256
ChunkedContentFactory((ie.file_id, ie.revision), (), None, [])])
257
# Remember for next time
258
existing_children = set()
260
for child_mode, name, child_hexsha in tree.entries():
261
existing_children.add(name)
262
child_path = posixpath.join(path, name)
263
if type(base_tree) is Tree:
265
child_base_mode, child_base_hexsha = base_tree[name]
267
child_base_hexsha = None
270
child_base_hexsha = None
272
if stat.S_ISDIR(child_mode):
273
subinvdelta, grandchildmodes = import_git_tree(texts, mapping,
274
child_path, name, (child_base_hexsha, child_hexsha), base_inv,
275
file_id, revision_id, parent_invs, lookup_object,
276
(child_base_mode, child_mode), store_updater, lookup_file_id,
277
allow_submodules=allow_submodules)
278
elif S_ISGITLINK(child_mode): # submodule
279
if not allow_submodules:
280
raise SubmodulesRequireSubtrees()
281
subinvdelta, grandchildmodes = import_git_submodule(texts, mapping,
282
child_path, name, (child_base_hexsha, child_hexsha), base_inv,
283
file_id, revision_id, parent_invs, lookup_object,
284
(child_base_mode, child_mode), store_updater, lookup_file_id)
286
subinvdelta = import_git_blob(texts, mapping, child_path, name,
287
(child_base_hexsha, child_hexsha), base_inv, file_id,
288
revision_id, parent_invs, lookup_object,
289
(child_base_mode, child_mode), store_updater, lookup_file_id)
291
child_modes.update(grandchildmodes)
292
invdelta.extend(subinvdelta)
293
if child_mode not in (stat.S_IFDIR, DEFAULT_FILE_MODE,
294
stat.S_IFLNK, DEFAULT_FILE_MODE|0111):
295
child_modes[child_path] = child_mode
296
# Remove any children that have disappeared
297
if base_tree is not None and type(base_tree) is Tree:
298
invdelta.extend(remove_disappeared_children(base_inv, old_path,
299
base_tree, existing_children, lookup_object))
300
store_updater.add_object(tree, ie, path)
301
return invdelta, child_modes
304
def verify_commit_reconstruction(target_git_object_retriever, lookup_object,
305
o, rev, ret_tree, parent_trees, mapping, unusual_modes):
306
new_unusual_modes = mapping.export_unusual_file_modes(rev)
307
if new_unusual_modes != unusual_modes:
308
raise AssertionError("unusual modes don't match: %r != %r" % (
309
unusual_modes, new_unusual_modes))
310
# Verify that we can reconstruct the commit properly
311
rec_o = target_git_object_retriever._reconstruct_commit(rev, o.tree, True)
313
raise AssertionError("Reconstructed commit differs: %r != %r" % (
317
for path, obj, ie in _tree_to_objects(ret_tree, parent_trees,
318
target_git_object_retriever._cache.idmap, unusual_modes, mapping.BZR_DUMMY_FILE):
319
old_obj_id = tree_lookup_path(lookup_object, o.tree, path)[1]
321
if obj.id != old_obj_id:
322
diff.append((path, lookup_object(old_obj_id), obj))
323
for (path, old_obj, new_obj) in diff:
324
while (old_obj.type_name == "tree" and
325
new_obj.type_name == "tree" and
326
sorted(old_obj) == sorted(new_obj)):
328
if old_obj[name][0] != new_obj[name][0]:
329
raise AssertionError("Modes for %s differ: %o != %o" %
330
(path, old_obj[name][0], new_obj[name][0]))
331
if old_obj[name][1] != new_obj[name][1]:
332
# Found a differing child, delve deeper
333
path = posixpath.join(path, name)
334
old_obj = lookup_object(old_obj[name][1])
335
new_obj = new_objs[path]
337
raise AssertionError("objects differ for %s: %r != %r" % (path,
341
def import_git_commit(repo, mapping, head, lookup_object,
342
target_git_object_retriever, trees_cache):
343
o = lookup_object(head)
344
rev = mapping.import_commit(o,
345
lambda x: target_git_object_retriever.lookup_git_sha(x)[1][0])
346
# We have to do this here, since we have to walk the tree and
347
# we need to make sure to import the blobs / trees with the right
348
# path; this may involve adding them more than once.
349
parent_trees = trees_cache.revision_trees(rev.parent_ids)
350
if parent_trees == []:
351
base_inv = Inventory(root_id=None)
355
base_inv = parent_trees[0].inventory
356
base_tree = lookup_object(o.parents[0]).tree
357
base_mode = stat.S_IFDIR
358
store_updater = target_git_object_retriever._get_updater(rev)
359
store_updater.add_object(o, None, None)
360
fileid_map = mapping.get_fileid_map(lookup_object, o.tree)
361
inv_delta, unusual_modes = import_git_tree(repo.texts,
362
mapping, "", "", (base_tree, o.tree), base_inv,
363
None, rev.revision_id, [p.inventory for p in parent_trees],
364
lookup_object, (base_mode, stat.S_IFDIR), store_updater,
365
fileid_map.lookup_file_id,
366
allow_submodules=getattr(repo._format, "supports_tree_reference", False))
367
store_updater.finish()
368
if unusual_modes != {}:
369
for path, mode in unusual_modes.iteritems():
370
warn_unusual_mode(rev.foreign_revid, path, mode)
371
mapping.import_unusual_file_modes(rev, unusual_modes)
373
basis_id = rev.parent_ids[0]
375
basis_id = NULL_REVISION
377
rev.inventory_sha1, inv = repo.add_inventory_by_delta(basis_id,
378
inv_delta, rev.revision_id, rev.parent_ids, base_inv)
379
ret_tree = RevisionTree(repo, inv, rev.revision_id)
380
trees_cache.add(ret_tree)
381
repo.add_revision(rev.revision_id, rev)
382
if "verify" in debug.debug_flags:
383
verify_commit_reconstruction(target_git_object_retriever,
384
lookup_object, o, rev, ret_tree, parent_trees, mapping,
388
def import_git_objects(repo, mapping, object_iter,
389
target_git_object_retriever, heads, pb=None, limit=None):
390
"""Import a set of git objects into a bzr repository.
392
:param repo: Target Bazaar repository
393
:param mapping: Mapping to use
394
:param object_iter: Iterator over Git objects.
395
:return: Tuple with pack hints and last imported revision id
397
def lookup_object(sha):
399
return object_iter[sha]
401
return target_git_object_retriever[sha]
404
heads = list(set(heads))
405
trees_cache = LRUTreeCache(repo)
406
# Find and convert commit objects
409
pb.update("finding revisions to fetch", len(graph), None)
411
assert isinstance(head, str)
413
o = lookup_object(head)
416
if isinstance(o, Commit):
417
rev = mapping.import_commit(o, lambda x: None)
418
if repo.has_revision(rev.revision_id):
420
graph.append((o.id, o.parents))
421
heads.extend([p for p in o.parents if p not in checked])
422
elif isinstance(o, Tag):
423
if o.object[1] not in checked:
424
heads.append(o.object[1])
426
trace.warning("Unable to import head object %r" % o)
429
# Order the revisions
430
# Create the inventory objects
432
revision_ids = topo_sort(graph)
434
if limit is not None:
435
revision_ids = revision_ids[:limit]
437
for offset in range(0, len(revision_ids), batch_size):
438
target_git_object_retriever.start_write_group()
440
repo.start_write_group()
442
for i, head in enumerate(
443
revision_ids[offset:offset+batch_size]):
445
pb.update("fetching revisions", offset+i,
447
import_git_commit(repo, mapping, head, lookup_object,
448
target_git_object_retriever, trees_cache)
451
repo.abort_write_group()
454
hint = repo.commit_write_group()
456
pack_hints.extend(hint)
458
target_git_object_retriever.abort_write_group()
461
target_git_object_retriever.commit_write_group()
462
return pack_hints, last_imported
465
class InterGitRepository(InterRepository):
467
_matching_repo_format = GitRepositoryFormat()
470
def _get_repo_format_to_test():
473
def copy_content(self, revision_id=None, pb=None):
474
"""See InterRepository.copy_content."""
475
self.fetch(revision_id, pb, find_ghosts=False)
478
class InterGitNonGitRepository(InterGitRepository):
479
"""Base InterRepository that copies revisions from a Git into a non-Git
482
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
483
mapping=None, fetch_spec=None):
485
mapping = self.source.get_mapping()
486
if revision_id is not None:
487
interesting_heads = [revision_id]
488
elif fetch_spec is not None:
489
interesting_heads = fetch_spec.heads
491
interesting_heads = None
493
def determine_wants(refs):
495
if interesting_heads is None:
496
ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
498
ret = [self.source.lookup_bzr_revision_id(revid)[0] for revid in interesting_heads if revid not in (None, NULL_REVISION)]
499
return [rev for rev in ret if not self.target.has_revision(self.source.lookup_foreign_revision_id(rev))]
500
(pack_hint, _) = self.fetch_objects(determine_wants, mapping, pb)
501
if pack_hint is not None and self.target._format.pack_compresses:
502
self.target.pack(hint=pack_hint)
506
_GIT_PROGRESS_RE = re.compile(r"(.*?): +(\d+)% \((\d+)/(\d+)\)")
507
def report_git_progress(pb, text):
508
text = text.rstrip("\r\n")
509
g = _GIT_PROGRESS_RE.match(text)
511
(text, pct, current, total) = g.groups()
512
pb.update(text, int(current), int(total))
514
pb.update(text, 0, 0)
517
class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
518
"""InterRepository that copies revisions from a remote Git into a non-Git
521
def get_target_heads(self):
522
# FIXME: This should be more efficient
523
all_revs = self.target.all_revision_ids()
524
parent_map = self.target.get_parent_map(all_revs)
526
map(all_parents.update, parent_map.itervalues())
527
return set(all_revs) - all_parents
529
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
531
report_git_progress(pb, text)
532
store = BazaarObjectStore(self.target, mapping)
533
self.target.lock_write()
535
heads = self.get_target_heads()
536
graph_walker = store.get_graph_walker(
537
[store._lookup_revision_sha1(head) for head in heads])
540
def record_determine_wants(heads):
541
wants = determine_wants(heads)
542
recorded_wants.extend(wants)
547
create_pb = pb = ui.ui_factory.nested_progress_bar()
549
objects_iter = self.source.fetch_objects(record_determine_wants,
550
graph_walker, store.get_raw, progress)
551
return import_git_objects(self.target, mapping,
552
objects_iter, store, recorded_wants, pb, limit)
560
def is_compatible(source, target):
561
"""Be compatible with GitRepository."""
562
return (isinstance(source, RemoteGitRepository) and
563
target.supports_rich_root() and
564
not isinstance(target, GitRepository) and
565
target.texts is not None)
568
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
569
"""InterRepository that copies revisions from a local Git into a non-Git
572
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
575
wants = determine_wants(self.source._git.get_refs())
578
create_pb = pb = ui.ui_factory.nested_progress_bar()
579
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
581
self.target.lock_write()
583
return import_git_objects(self.target, mapping,
584
self.source._git.object_store,
585
target_git_object_retriever, wants, pb, limit)
593
def is_compatible(source, target):
594
"""Be compatible with GitRepository."""
595
return (isinstance(source, LocalGitRepository) and
596
target.supports_rich_root() and
597
not isinstance(target, GitRepository) and
598
target.texts is not None)
601
class InterGitGitRepository(InterGitRepository):
602
"""InterRepository that copies between Git repositories."""
604
def fetch_objects(self, determine_wants, mapping, pb=None):
606
trace.note("git: %s", text)
607
graphwalker = self.target._git.get_graph_walker()
608
if (isinstance(self.source, LocalGitRepository) and
609
isinstance(self.target, LocalGitRepository)):
610
return self.source._git.fetch(self.target._git, determine_wants,
612
elif (isinstance(self.source, LocalGitRepository) and
613
isinstance(self.target, RemoteGitRepository)):
614
raise NotImplementedError
615
elif (isinstance(self.source, RemoteGitRepository) and
616
isinstance(self.target, LocalGitRepository)):
617
f, commit = self.target._git.object_store.add_thin_pack()
619
refs = self.source._git.fetch_pack(determine_wants,
620
graphwalker, f.write, progress)
629
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
630
mapping=None, fetch_spec=None, branches=None):
632
mapping = self.source.get_mapping()
634
if revision_id is not None:
635
args = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
636
elif fetch_spec is not None:
637
args = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in fetch_spec.heads]
638
if branches is not None:
639
determine_wants = lambda x: [x[y] for y in branches if not x[y] in r.object_store]
640
elif fetch_spec is None and revision_id is None:
641
determine_wants = r.object_store.determine_wants_all
643
determine_wants = lambda x: [y for y in args if not y in r.object_store]
644
return self.fetch_objects(determine_wants, mapping)[0]
647
def is_compatible(source, target):
648
"""Be compatible with GitRepository."""
649
return (isinstance(source, GitRepository) and
650
isinstance(target, GitRepository))
added
removed
fetch.py
