1
# Copyright (C) 2008 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 cStringIO import (
21
from dulwich.client import (
22
SimpleFetchGraphWalker,
24
from dulwich.objects import (
28
from dulwich.object_store import (
40
from bzrlib.errors import (
45
from bzrlib.inventory import (
51
from bzrlib.lru_cache import (
54
from bzrlib.repository import (
57
from bzrlib.revision import (
60
from bzrlib.tsort import (
64
from bzrlib.plugins.git.converter import (
67
from bzrlib.plugins.git.mapping import (
69
inventory_to_tree_and_blobs,
72
from bzrlib.plugins.git.repository import (
77
from bzrlib.plugins.git.remote import (
82
class BzrFetchGraphWalker(object):
83
"""GraphWalker implementation that uses a Bazaar repository."""
85
def __init__(self, repository, mapping):
86
self.repository = repository
87
self.mapping = mapping
89
self.heads = set(repository.all_revision_ids())
93
return iter(self.next, None)
96
revid = self.mapping.revision_id_foreign_to_bzr(sha)
99
def remove(self, revid):
101
if revid in self.heads:
102
self.heads.remove(revid)
103
if revid in self.parents:
104
for p in self.parents[revid]:
109
ret = self.heads.pop()
110
ps = self.repository.get_parent_map([ret])[ret]
111
self.parents[ret] = ps
112
self.heads.update([p for p in ps if not p in self.done])
115
return self.mapping.revision_id_bzr_to_foreign(ret)[0]
116
except InvalidRevisionId:
121
def import_git_blob(texts, mapping, path, hexsha, base_inv, parent_id,
122
revision_id, parent_invs, shagitmap, lookup_object, executable, symlink):
123
"""Import a git blob object into a bzr repository.
125
:param texts: VersionedFiles to add to
126
:param path: Path in the tree
127
:param blob: A git blob
128
:return: Inventory delta for this file
130
file_id = mapping.generate_file_id(path)
135
# We just have to hope this is indeed utf-8:
136
ie = cls(file_id, urlutils.basename(path).decode("utf-8"), parent_id)
137
ie.executable = executable
139
# See if this has changed at all
141
base_ie = base_inv[file_id]
146
if base_ie.text_id == hexsha:
149
base_sha = shagitmap.lookup_blob(file_id, base_ie.revision)
153
if (base_sha == hexsha and base_ie.executable == ie.executable
154
and base_ie.kind == ie.kind):
155
# If nothing has changed since the base revision, we're done
157
if base_sha == hexsha:
158
ie.text_size = base_ie.text_size
159
ie.text_sha1 = base_ie.text_sha1
160
ie.symlink_target = base_ie.symlink_target
161
ie.revision = base_ie.revision
163
blob = lookup_object(hexsha)
164
if ie.kind == "symlink":
165
ie.symlink_target = blob.data
169
ie.text_size = len(blob.data)
170
ie.text_sha1 = osutils.sha_string(blob.data)
171
# Check what revision we should store
173
for pinv in parent_invs:
174
if pinv.revision_id == base_inv.revision_id:
183
if pie.text_sha1 == ie.text_sha1:
184
# found a revision in one of the parents to use
185
ie.revision = pie.revision
187
parent_keys.append((file_id, pie.revision))
188
if ie.revision is None:
189
# Need to store a new revision
190
ie.revision = revision_id
191
assert file_id is not None
192
assert ie.revision is not None
193
texts.add_lines((file_id, ie.revision), tuple(parent_keys),
194
osutils.split_lines(blob.data))
195
if file_id in base_inv:
196
old_path = base_inv.id2path(file_id)
199
return ([(old_path, path, file_id, ie)],
200
[(hexsha, "blob", (ie.file_id, ie.revision))])
203
def import_git_tree(texts, mapping, path, hexsha, base_inv, parent_id,
204
revision_id, parent_invs, shagitmap, lookup_object):
205
"""Import a git tree object into a bzr repository.
207
:param texts: VersionedFiles object to add to
208
:param path: Path in the tree
209
:param tree: A git tree object
210
:param base_inv: Base inventory against which to return inventory delta
211
:return: Inventory delta for this subtree
214
file_id = mapping.generate_file_id(path)
215
# We just have to hope this is indeed utf-8:
216
ie = InventoryDirectory(file_id, urlutils.basename(path.decode("utf-8")),
220
base_ie = base_inv[file_id]
222
# Newly appeared here
224
ie.revision = revision_id
225
texts.add_lines((file_id, ie.revision), (), [])
226
invdelta.append((None, path, file_id, ie))
228
if base_ie.text_id == hexsha:
230
# See if this has changed at all
232
base_sha = shagitmap.lookup_tree(file_id, base_inv.revision_id)
236
if base_sha == hexsha:
237
# If nothing has changed since the base revision, we're done
239
# Remember for next time
240
existing_children = set()
243
tree = lookup_object(hexsha)
244
for mode, name, child_hexsha in tree.entries():
245
basename = name.decode("utf-8")
246
existing_children.add(basename)
247
child_path = osutils.pathjoin(path, name)
248
if stat.S_ISDIR(mode):
249
subinvdelta, grandchildmodes, subshamap = import_git_tree(texts,
250
mapping, child_path, child_hexsha, base_inv, file_id,
251
revision_id, parent_invs, shagitmap, lookup_object)
252
invdelta.extend(subinvdelta)
253
child_modes.update(grandchildmodes)
254
shamap.extend(subshamap)
256
fs_mode = stat.S_IMODE(mode)
257
symlink = stat.S_ISLNK(mode)
258
subinvdelta, subshamap = import_git_blob(texts, mapping,
259
child_path, child_hexsha, base_inv, file_id, revision_id,
260
parent_invs, shagitmap, lookup_object,
261
bool(fs_mode & 0111), symlink)
262
invdelta.extend(subinvdelta)
263
shamap.extend(subshamap)
264
if mode not in (stat.S_IFDIR, DEFAULT_FILE_MODE,
265
stat.S_IFLNK, DEFAULT_FILE_MODE|0111):
266
child_modes[child_path] = mode
267
# Remove any children that have disappeared
268
if base_ie is not None:
269
deletable = [v for k,v in base_ie.children.iteritems() if k not in existing_children]
272
invdelta.append((base_inv.id2path(ie.file_id), None, ie.file_id, None))
273
if ie.kind == "directory":
274
deletable.extend(ie.children.values())
275
shamap.append((hexsha, "tree", (file_id, revision_id)))
276
return invdelta, child_modes, shamap
279
def import_git_objects(repo, mapping, object_iter, target_git_object_retriever,
281
"""Import a set of git objects into a bzr repository.
283
:param repo: Bazaar repository
284
:param mapping: Mapping to use
285
:param object_iter: Iterator over Git objects.
287
# TODO: a more (memory-)efficient implementation of this
293
parent_invs_cache = LRUCache(50)
294
# Find and convert commit objects
297
pb.update("finding revisions to fetch", len(graph), None)
299
assert isinstance(head, str)
301
o = object_iter[head]
304
if isinstance(o, Commit):
305
rev = mapping.import_commit(o)
306
if repo.has_revision(rev.revision_id):
308
root_trees[rev.revision_id] = o.tree
309
revisions[rev.revision_id] = rev
310
graph.append((rev.revision_id, rev.parent_ids))
311
target_git_object_retriever._idmap.add_entry(o.id, "commit",
312
(rev.revision_id, o.tree))
313
heads.extend([p for p in o.parents if p not in checked])
314
elif isinstance(o, Tag):
315
heads.append(o.object[1])
317
trace.warning("Unable to import head object %r" % o)
319
# Order the revisions
320
# Create the inventory objects
321
for i, revid in enumerate(topo_sort(graph)):
323
pb.update("fetching revisions", i, len(graph))
324
rev = revisions[revid]
325
# We have to do this here, since we have to walk the tree and
326
# we need to make sure to import the blobs / trees with the right
327
# path; this may involve adding them more than once.
328
def lookup_object(sha):
330
return object_iter[sha]
332
return target_git_object_retriever[sha]
334
for parent_id in rev.parent_ids:
336
parent_invs.append(parent_invs_cache[parent_id])
338
parent_inv = repo.get_inventory(parent_id)
339
parent_invs.append(parent_inv)
340
parent_invs_cache[parent_id] = parent_inv
341
if parent_invs == []:
342
base_inv = Inventory(root_id=None)
344
base_inv = parent_invs[0]
345
inv_delta, unusual_modes, shamap = import_git_tree(repo.texts,
346
mapping, "", root_trees[revid], base_inv, None, revid,
347
parent_invs, target_git_object_retriever._idmap, lookup_object)
348
target_git_object_retriever._idmap.add_entries(shamap)
349
if unusual_modes != {}:
350
ret = "unusual modes: \n"
351
for item in unusual_modes.iteritems():
352
ret += "\t%s: %o\n" % item
353
raise AssertionError(ret)
355
basis_id = rev.parent_ids[0]
357
basis_id = NULL_REVISION
358
rev.inventory_sha1, inv = repo.add_inventory_by_delta(basis_id,
359
inv_delta, rev.revision_id, rev.parent_ids)
360
parent_invs_cache[rev.revision_id] = inv
361
repo.add_revision(rev.revision_id, rev)
362
if "verify" in debug.debug_flags:
363
objs = inventory_to_tree_and_blobs(inv, repo.texts, mapping)
364
for sha1, newobj, path in objs:
365
assert path is not None
366
oldobj = tree_lookup_path(lookup_object, root_trees[revid], path)
367
assert oldobj == newobj, "%r != %r in %s" % (oldobj, newobj, path)
369
target_git_object_retriever._idmap.commit()
372
class InterGitNonGitRepository(InterRepository):
373
"""Base InterRepository that copies revisions from a Git into a non-Git
376
_matching_repo_format = GitRepositoryFormat()
379
def _get_repo_format_to_test():
382
def copy_content(self, revision_id=None, pb=None):
383
"""See InterRepository.copy_content."""
384
self.fetch(revision_id, pb, find_ghosts=False)
386
def fetch(self, revision_id=None, pb=None, find_ghosts=False, mapping=None,
388
self.fetch_refs(revision_id=revision_id, pb=pb, find_ghosts=find_ghosts,
389
mapping=mapping, fetch_spec=fetch_spec)
391
def fetch_refs(self, revision_id=None, pb=None, find_ghosts=False,
392
mapping=None, fetch_spec=None):
394
mapping = self.source.get_mapping()
395
if revision_id is not None:
396
interesting_heads = [revision_id]
397
elif fetch_spec is not None:
398
interesting_heads = fetch_spec.heads
400
interesting_heads = None
402
def determine_wants(refs):
404
if interesting_heads is None:
405
ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
407
ret = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in interesting_heads if revid != NULL_REVISION]
408
return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
409
self.fetch_objects(determine_wants, mapping, pb)
414
class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
415
"""InterRepository that copies revisions from a remote Git into a non-Git
418
def fetch_objects(self, determine_wants, mapping, pb=None):
420
pb.update("git: %s" % text.rstrip("\r\n"), 0, 0)
421
graph_walker = BzrFetchGraphWalker(self.target, mapping)
424
create_pb = pb = ui.ui_factory.nested_progress_bar()
425
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
428
def record_determine_wants(heads):
429
wants = determine_wants(heads)
430
recorded_wants.extend(wants)
434
self.target.lock_write()
436
self.target.start_write_group()
438
objects_iter = self.source.fetch_objects(
439
record_determine_wants,
441
target_git_object_retriever.get_raw,
443
import_git_objects(self.target, mapping, objects_iter,
444
target_git_object_retriever, recorded_wants, pb)
446
self.target.commit_write_group()
454
def is_compatible(source, target):
455
"""Be compatible with GitRepository."""
456
# FIXME: Also check target uses VersionedFile
457
return (isinstance(source, RemoteGitRepository) and
458
target.supports_rich_root() and
459
not isinstance(target, GitRepository))
462
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
463
"""InterRepository that copies revisions from a remote Git into a non-Git
466
def fetch_objects(self, determine_wants, mapping, pb=None):
467
wants = determine_wants(self.source._git.get_refs())
470
create_pb = pb = ui.ui_factory.nested_progress_bar()
471
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
473
self.target.lock_write()
475
self.target.start_write_group()
477
import_git_objects(self.target, mapping,
478
self.source._git.object_store,
479
target_git_object_retriever, wants, pb)
481
self.target.commit_write_group()
489
def is_compatible(source, target):
490
"""Be compatible with GitRepository."""
491
# FIXME: Also check target uses VersionedFile
492
return (isinstance(source, LocalGitRepository) and
493
target.supports_rich_root() and
494
not isinstance(target, GitRepository))
497
class InterGitRepository(InterRepository):
498
"""InterRepository that copies between Git repositories."""
500
_matching_repo_format = GitRepositoryFormat()
503
def _get_repo_format_to_test():
506
def copy_content(self, revision_id=None, pb=None):
507
"""See InterRepository.copy_content."""
508
self.fetch(revision_id, pb, find_ghosts=False)
510
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
511
mapping=None, fetch_spec=None):
513
mapping = self.source.get_mapping()
515
trace.info("git: %s", text)
517
if revision_id is not None:
518
args = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
519
elif fetch_spec is not None:
520
args = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in fetch_spec.heads]
521
if fetch_spec is None and revision_id is None:
522
determine_wants = r.object_store.determine_wants_all
524
determine_wants = lambda x: [y for y in args if not y in r.object_store]
526
graphwalker = SimpleFetchGraphWalker(r.heads().values(), r.get_parents)
527
f, commit = r.object_store.add_thin_pack()
529
self.source.fetch_pack(determine_wants, graphwalker, f.write, progress)
536
def is_compatible(source, target):
537
"""Be compatible with GitRepository."""
538
return (isinstance(source, GitRepository) and
539
isinstance(target, GitRepository))