14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
from bzrlib import osutils, ui, urlutils
18
from bzrlib.errors import InvalidRevisionId
19
from bzrlib.inventory import Inventory
20
from bzrlib.repository import InterRepository
21
from bzrlib.trace import info
22
from bzrlib.tsort import topo_sort
24
from bzrlib.plugins.git import git
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 (
68
inventory_to_tree_and_blobs,
74
from bzrlib.plugins.git.object_store import (
78
from bzrlib.plugins.git.remote import (
25
81
from bzrlib.plugins.git.repository import (
30
from bzrlib.plugins.git.remote import RemoteGitRepository
32
from dulwich.objects import Commit
34
from cStringIO import StringIO
37
class BzrFetchGraphWalker(object):
39
def __init__(self, repository, mapping):
40
self.repository = repository
41
self.mapping = mapping
43
self.heads = set(repository.all_revision_ids())
47
revid = self.mapping.revision_id_foreign_to_bzr(sha)
50
def remove(self, revid):
53
self.heads.remove(revid)
54
if revid in self.parents:
55
for p in self.parents[revid]:
60
ret = self.heads.pop()
61
ps = self.repository.get_parent_map([ret])[ret]
62
self.parents[ret] = ps
63
self.heads.update([p for p in ps if not p in self.done])
66
return self.mapping.revision_id_bzr_to_foreign(ret)
67
except InvalidRevisionId:
72
def import_git_blob(repo, mapping, path, blob, inv, parent_invs, executable):
88
def import_git_blob(texts, mapping, path, name, (base_hexsha, hexsha),
89
base_inv, parent_id, revision_id,
90
parent_invs, lookup_object, (base_mode, mode), store_updater):
73
91
"""Import a git blob object into a bzr repository.
75
:param repo: bzr repository
93
:param texts: VersionedFiles to add to
76
94
:param path: Path in the tree
77
95
:param blob: A git blob
96
:return: Inventory delta for this file
79
file_id = mapping.generate_file_id(path)
80
text_revision = inv.revision_id
81
repo.texts.add_lines((file_id, text_revision),
82
[(file_id, p[file_id].revision) for p in parent_invs if file_id in p],
83
osutils.split_lines(blob.data))
84
ie = inv.add_path(path, "file", file_id)
85
ie.revision = text_revision
86
ie.text_size = len(blob.data)
87
ie.text_sha1 = osutils.sha_string(blob.data)
88
ie.executable = executable
91
def import_git_tree(repo, mapping, path, tree, inv, parent_invs, lookup_object):
98
if base_hexsha == hexsha and base_mode == mode:
99
# If nothing has changed since the base revision, we're done
101
file_id = mapping.generate_file_id(path)
102
if stat.S_ISLNK(mode):
106
ie = cls(file_id, name.decode("utf-8"), parent_id)
107
ie.executable = mode_is_executable(mode)
108
if base_hexsha == hexsha and mode_kind(base_mode) == mode_kind(mode):
109
base_ie = base_inv[base_inv.path2id(path)]
110
ie.text_size = base_ie.text_size
111
ie.text_sha1 = base_ie.text_sha1
112
ie.symlink_target = base_ie.symlink_target
113
if ie.executable == base_ie.executable:
114
ie.revision = base_ie.revision
116
blob = lookup_object(hexsha)
118
blob = lookup_object(hexsha)
119
if ie.kind == "symlink":
121
ie.symlink_target = blob.data
125
ie.text_size = sum(imap(len, blob.chunked))
126
ie.text_sha1 = osutils.sha_strings(blob.chunked)
127
# Check what revision we should store
129
for pinv in parent_invs[1:]:
134
if pie.text_sha1 == ie.text_sha1 and pie.executable == ie.executable and pie.symlink_target == ie.symlink_target:
135
# found a revision in one of the parents to use
136
ie.revision = pie.revision
138
parent_keys.append((file_id, pie.revision))
139
if ie.revision is None:
140
# Need to store a new revision
141
ie.revision = revision_id
142
assert ie.revision is not None
143
if ie.kind == 'symlink':
146
chunks = blob.chunked
147
texts.insert_record_stream([ChunkedContentFactory((file_id, ie.revision), tuple(parent_keys), ie.text_sha1, chunks)])
149
if base_hexsha is not None:
150
old_path = path # Renames are not supported yet
151
if stat.S_ISDIR(base_mode):
152
invdelta.extend(remove_disappeared_children(base_inv, old_path,
153
lookup_object(base_hexsha), [], lookup_object))
156
invdelta.append((old_path, path, file_id, ie))
157
if base_hexsha != hexsha:
158
store_updater.add_object(blob, ie)
162
class SubmodulesRequireSubtrees(BzrError):
163
_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'."""
167
def import_git_submodule(texts, mapping, path, name, (base_hexsha, hexsha),
168
base_inv, parent_id, revision_id, parent_invs, lookup_object,
169
(base_mode, mode), store_updater):
170
if base_hexsha == hexsha and base_mode == mode:
172
file_id = mapping.generate_file_id(path)
173
ie = TreeReference(file_id, name.decode("utf-8"), parent_id)
174
ie.revision = revision_id
175
if base_hexsha is None:
179
ie.reference_revision = mapping.revision_id_foreign_to_bzr(hexsha)
180
texts.insert_record_stream([ChunkedContentFactory((file_id, ie.revision), (), None, [])])
181
invdelta = [(oldpath, path, file_id, ie)]
185
def remove_disappeared_children(base_inv, path, base_tree, existing_children,
188
for name, mode, hexsha in base_tree.iteritems():
189
if name in existing_children:
191
c_path = posixpath.join(path, name.decode("utf-8"))
192
ret.append((c_path, None, base_inv.path2id(c_path), None))
193
if stat.S_ISDIR(mode):
194
ret.extend(remove_disappeared_children(
195
base_inv, c_path, lookup_object(hexsha), [], lookup_object))
199
def import_git_tree(texts, mapping, path, name, (base_hexsha, hexsha),
200
base_inv, parent_id, revision_id, parent_invs,
201
lookup_object, (base_mode, mode), store_updater, allow_submodules=False):
92
202
"""Import a git tree object into a bzr repository.
94
:param repo: A Bzr repository object
204
:param texts: VersionedFiles object to add to
95
205
:param path: Path in the tree
96
206
:param tree: A git tree object
97
:param inv: Inventory object
207
:param base_inv: Base inventory against which to return inventory delta
208
:return: Inventory delta for this subtree
210
if base_hexsha == hexsha and base_mode == mode:
211
# If nothing has changed since the base revision, we're done
99
214
file_id = mapping.generate_file_id(path)
100
text_revision = inv.revision_id
101
repo.texts.add_lines((file_id, text_revision),
102
[(file_id, p[file_id].revision) for p in parent_invs if file_id in p],
104
ie = inv.add_path(path, "directory", file_id)
105
ie.revision = text_revision
106
for mode, name, hexsha in tree.entries():
107
entry_kind = (mode & 0700000) / 0100000
108
basename = name.decode("utf-8")
112
child_path = urlutils.join(path, name)
114
tree = lookup_object(hexsha)
115
import_git_tree(repo, mapping, child_path, tree, inv, parent_invs, lookup_object)
116
elif entry_kind == 1:
117
blob = lookup_object(hexsha)
118
fs_mode = mode & 0777
119
import_git_blob(repo, mapping, child_path, blob, inv, parent_invs, bool(fs_mode & 0111))
121
raise AssertionError("Unknown blob kind, perms=%r." % (mode,))
124
def import_git_objects(repo, mapping, object_iter, pb=None):
215
# We just have to hope this is indeed utf-8:
216
ie = InventoryDirectory(file_id, name.decode("utf-8"), parent_id)
217
tree = lookup_object(hexsha)
218
if base_hexsha is None:
220
old_path = None # Newly appeared here
222
base_tree = lookup_object(base_hexsha)
223
old_path = path # Renames aren't supported yet
224
if base_tree is None or type(base_tree) is not Tree:
225
ie.revision = revision_id
226
invdelta.append((old_path, path, ie.file_id, ie))
227
texts.insert_record_stream([ChunkedContentFactory((ie.file_id, ie.revision), (), None, [])])
228
# Remember for next time
229
existing_children = set()
231
for child_mode, name, child_hexsha in tree.entries():
232
existing_children.add(name)
233
child_path = posixpath.join(path, name)
234
if type(base_tree) is Tree:
236
child_base_mode, child_base_hexsha = base_tree[name]
238
child_base_hexsha = None
241
child_base_hexsha = None
243
if stat.S_ISDIR(child_mode):
244
subinvdelta, grandchildmodes = import_git_tree(
245
texts, mapping, child_path, name,
246
(child_base_hexsha, child_hexsha),
247
base_inv, file_id, revision_id, parent_invs, lookup_object,
248
(child_base_mode, child_mode), store_updater,
249
allow_submodules=allow_submodules)
250
elif S_ISGITLINK(child_mode): # submodule
251
if not allow_submodules:
252
raise SubmodulesRequireSubtrees()
253
subinvdelta, grandchildmodes = import_git_submodule(
254
texts, mapping, child_path, name,
255
(child_base_hexsha, child_hexsha),
256
base_inv, file_id, revision_id, parent_invs, lookup_object,
257
(child_base_mode, child_mode), store_updater)
259
subinvdelta = import_git_blob(texts, mapping,
260
child_path, name, (child_base_hexsha, child_hexsha),
261
base_inv, file_id, revision_id, parent_invs, lookup_object,
262
(child_base_mode, child_mode), store_updater)
264
child_modes.update(grandchildmodes)
265
invdelta.extend(subinvdelta)
266
if child_mode not in (stat.S_IFDIR, DEFAULT_FILE_MODE,
267
stat.S_IFLNK, DEFAULT_FILE_MODE|0111):
268
child_modes[child_path] = child_mode
269
# Remove any children that have disappeared
270
if base_tree is not None and type(base_tree) is Tree:
271
invdelta.extend(remove_disappeared_children(base_inv, old_path,
272
base_tree, existing_children, lookup_object))
273
store_updater.add_object(tree, ie)
274
return invdelta, child_modes
277
def import_git_commit(repo, mapping, head, lookup_object,
278
target_git_object_retriever, trees_cache):
279
o = lookup_object(head)
280
rev = mapping.import_commit(o)
281
# We have to do this here, since we have to walk the tree and
282
# we need to make sure to import the blobs / trees with the right
283
# path; this may involve adding them more than once.
284
parent_trees = trees_cache.revision_trees(rev.parent_ids)
285
if parent_trees == []:
286
base_inv = Inventory(root_id=None)
290
base_inv = parent_trees[0].inventory
291
base_tree = lookup_object(o.parents[0]).tree
292
base_mode = stat.S_IFDIR
293
store_updater = target_git_object_retriever._get_updater(rev)
294
store_updater.add_object(o, None)
295
inv_delta, unusual_modes = import_git_tree(repo.texts,
296
mapping, "", u"", (base_tree, o.tree), base_inv,
297
None, rev.revision_id, [p.inventory for p in parent_trees],
298
lookup_object, (base_mode, stat.S_IFDIR), store_updater,
299
allow_submodules=getattr(repo._format, "supports_tree_reference", False))
300
store_updater.finish()
301
if unusual_modes != {}:
302
for path, mode in unusual_modes.iteritems():
303
warn_unusual_mode(rev.foreign_revid, path, mode)
304
mapping.import_unusual_file_modes(rev, unusual_modes)
306
basis_id = rev.parent_ids[0]
308
basis_id = NULL_REVISION
310
rev.inventory_sha1, inv = repo.add_inventory_by_delta(basis_id,
311
inv_delta, rev.revision_id, rev.parent_ids,
313
trees_cache.add(RevisionTree(repo, inv, rev.revision_id))
314
repo.add_revision(rev.revision_id, rev)
315
if "verify" in debug.debug_flags:
316
new_unusual_modes = mapping.export_unusual_file_modes(rev)
317
if new_unusual_modes != unusual_modes:
318
raise AssertionError("unusual modes don't match: %r != %r" % (
319
unusual_modes, new_unusual_modes))
320
objs = inventory_to_tree_and_blobs(inv, repo.texts, mapping,
322
for newsha1, newobj, path in objs:
323
assert path is not None
327
(oldmode, oldsha1) = tree_lookup_path(lookup_object, o.tree,
329
if oldsha1 != newsha1:
330
raise AssertionError("%r != %r in %s" % (oldsha1,
334
def import_git_objects(repo, mapping, object_iter,
335
target_git_object_retriever, heads, pb=None, limit=None):
125
336
"""Import a set of git objects into a bzr repository.
127
:param repo: Bazaar repository
338
:param repo: Target Bazaar repository
128
339
:param mapping: Mapping to use
129
340
:param object_iter: Iterator over Git objects.
341
:return: Tuple with pack hints and last imported revision id
131
# TODO: a more (memory-)efficient implementation of this
133
for i, o in enumerate(object_iter):
135
pb.update("fetching objects", i)
343
def lookup_object(sha):
345
return object_iter[sha]
347
return target_git_object_retriever[sha]
350
heads = list(set(heads))
351
trees_cache = LRUTreeCache(repo)
140
352
# Find and convert commit objects
141
for o in objects.itervalues():
355
pb.update("finding revisions to fetch", len(graph), None)
357
assert isinstance(head, str)
359
o = lookup_object(head)
142
362
if isinstance(o, Commit):
143
363
rev = mapping.import_commit(o)
144
root_trees[rev.revision_id] = objects[o.tree]
145
revisions[rev.revision_id] = rev
146
graph.append((rev.revision_id, rev.parent_ids))
364
if repo.has_revision(rev.revision_id):
366
squash_revision(repo, rev)
367
graph.append((o.id, o.parents))
368
heads.extend([p for p in o.parents if p not in checked])
369
elif isinstance(o, Tag):
370
if o.object[1] not in checked:
371
heads.append(o.object[1])
373
trace.warning("Unable to import head object %r" % o)
147
376
# Order the revisions
148
377
# Create the inventory objects
149
for i, revid in enumerate(topo_sort(graph)):
151
pb.update("fetching revisions", i, len(graph))
152
root_tree = root_trees[revid]
153
rev = revisions[revid]
154
# We have to do this here, since we have to walk the tree and
155
# we need to make sure to import the blobs / trees with the riht
156
# path; this may involve adding them more than once.
158
inv.revision_id = rev.revision_id
159
def lookup_object(sha):
162
return reconstruct_git_object(repo, mapping, sha)
163
parent_invs = [repo.get_inventory(r) for r in rev.parent_ids]
164
import_git_tree(repo, mapping, "", root_tree, inv, parent_invs, lookup_object)
165
repo.add_revision(rev.revision_id, rev, inv)
168
def reconstruct_git_commit(repo, rev):
169
raise NotImplementedError(self.reconstruct_git_commit)
172
def reconstruct_git_object(repo, mapping, sha):
174
revid = mapping.revision_id_foreign_to_bzr(sha)
176
rev = repo.get_revision(revid)
177
except NoSuchRevision:
180
return reconstruct_git_commit(rev)
184
raise KeyError("No such object %s" % sha)
379
revision_ids = topo_sort(graph)
381
if limit is not None:
382
revision_ids = revision_ids[:limit]
384
for offset in range(0, len(revision_ids), batch_size):
385
target_git_object_retriever.start_write_group()
387
repo.start_write_group()
389
for i, head in enumerate(
390
revision_ids[offset:offset+batch_size]):
392
pb.update("fetching revisions", offset+i,
394
import_git_commit(repo, mapping, head, lookup_object,
395
target_git_object_retriever,
399
repo.abort_write_group()
402
hint = repo.commit_write_group()
404
pack_hints.extend(hint)
406
target_git_object_retriever.abort_write_group()
409
target_git_object_retriever.commit_write_group()
410
return pack_hints, last_imported
187
413
class InterGitRepository(InterRepository):
189
_matching_repo_format = GitFormat()
415
_matching_repo_format = GitRepositoryFormat()
192
418
def _get_repo_format_to_test():
196
422
"""See InterRepository.copy_content."""
197
423
self.fetch(revision_id, pb, find_ghosts=False)
199
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
425
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
426
mapping=None, fetch_spec=None):
427
self.fetch_refs(revision_id=revision_id, pb=pb,
428
find_ghosts=find_ghosts, mapping=mapping, fetch_spec=fetch_spec)
431
class InterGitNonGitRepository(InterGitRepository):
432
"""Base InterRepository that copies revisions from a Git into a non-Git
435
def fetch_refs(self, revision_id=None, pb=None, find_ghosts=False,
436
mapping=None, fetch_spec=None):
201
437
if mapping is None:
202
438
mapping = self.source.get_mapping()
204
pb.note("git: %s", text)
205
def determine_wants(heads):
206
if revision_id is None:
439
if revision_id is not None:
440
interesting_heads = [revision_id]
441
elif fetch_spec is not None:
442
interesting_heads = fetch_spec.heads
444
interesting_heads = None
446
def determine_wants(refs):
448
if interesting_heads is None:
449
ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
209
ret = [mapping.revision_id_bzr_to_foreign(revision_id)]
451
ret = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in interesting_heads if revid not in (None, NULL_REVISION)]
210
452
return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
211
graph_walker = BzrFetchGraphWalker(self.target, mapping)
453
(pack_hint, _) = self.fetch_objects(determine_wants, mapping, pb)
454
if pack_hint is not None and self.target._format.pack_compresses:
455
self.target.pack(hint=pack_hint)
456
if interesting_heads is not None:
457
present_interesting_heads = self.target.has_revisions(interesting_heads)
458
missing_interesting_heads = set(interesting_heads) - present_interesting_heads
459
if missing_interesting_heads:
460
raise AssertionError("Missing interesting heads: %r" % missing_interesting_heads)
464
_GIT_PROGRESS_RE = re.compile(r"(.*?): +(\d+)% \((\d+)/(\d+)\)")
465
def report_git_progress(pb, text):
466
text = text.rstrip("\r\n")
467
g = _GIT_PROGRESS_RE.match(text)
469
(text, pct, current, total) = g.groups()
470
pb.update(text, int(current), int(total))
472
pb.update(text, 0, 0)
475
class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
476
"""InterRepository that copies revisions from a remote Git into a non-Git
479
def get_target_heads(self):
480
# FIXME: This should be more efficient
481
all_revs = self.target.all_revision_ids()
482
parent_map = self.target.get_parent_map(all_revs)
484
map(all_parents.update, parent_map.itervalues())
485
return set(all_revs) - all_parents
487
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
489
report_git_progress(pb, text)
490
store = BazaarObjectStore(self.target, mapping)
491
self.target.lock_write()
493
heads = self.get_target_heads()
494
graph_walker = store.get_graph_walker(
495
[store._lookup_revision_sha1(head) for head in heads])
498
def record_determine_wants(heads):
499
wants = determine_wants(heads)
500
recorded_wants.extend(wants)
505
create_pb = pb = ui.ui_factory.nested_progress_bar()
507
objects_iter = self.source.fetch_objects(
508
record_determine_wants, graph_walker,
509
store.get_raw, progress)
510
return import_git_objects(self.target, mapping,
511
objects_iter, store, recorded_wants, pb, limit)
519
def is_compatible(source, target):
520
"""Be compatible with GitRepository."""
521
# FIXME: Also check target uses VersionedFile
522
return (isinstance(source, RemoteGitRepository) and
523
target.supports_rich_root() and
524
not isinstance(target, GitRepository))
527
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
528
"""InterRepository that copies revisions from a local Git into a non-Git
531
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
534
wants = determine_wants(self.source._git.get_refs())
214
537
create_pb = pb = ui.ui_factory.nested_progress_bar()
538
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
216
540
self.target.lock_write()
218
self.target.start_write_group()
220
import_git_objects(self.target, mapping,
221
iter(self.source.fetch_objects(determine_wants, graph_walker,
224
self.target.commit_write_group()
542
return import_git_objects(self.target, mapping,
543
self.source._git.object_store,
544
target_git_object_retriever, wants, pb, limit)
226
546
self.target.unlock()
added
removed
fetch.py
