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.objects import (
25
from dulwich.object_store import (
37
from bzrlib.errors import (
42
from bzrlib.inventory import (
48
from bzrlib.lru_cache import (
51
from bzrlib.repository import (
54
from bzrlib.revision import (
57
from bzrlib.tsort import (
60
from bzrlib.versionedfile import (
61
FulltextContentFactory,
64
from bzrlib.plugins.git.mapping import (
66
inventory_to_tree_and_blobs,
69
from bzrlib.plugins.git.object_store import (
72
from bzrlib.plugins.git.remote import (
75
from bzrlib.plugins.git.repository import (
82
def import_git_blob(texts, mapping, path, hexsha, base_inv, parent_id,
83
revision_id, parent_invs, shagitmap, lookup_object, executable, symlink):
84
"""Import a git blob object into a bzr repository.
86
:param texts: VersionedFiles to add to
87
:param path: Path in the tree
88
:param blob: A git blob
89
:return: Inventory delta for this file
91
file_id = mapping.generate_file_id(path)
96
# We just have to hope this is indeed utf-8:
97
ie = cls(file_id, urlutils.basename(path).decode("utf-8"), parent_id)
98
ie.executable = executable
100
# See if this has changed at all
102
base_ie = base_inv[file_id]
107
base_sha = base_ie.text_id
110
base_sha = shagitmap.lookup_blob(file_id, base_ie.revision)
114
if (base_sha == hexsha and base_ie.executable == ie.executable
115
and base_ie.kind == ie.kind):
116
# If nothing has changed since the base revision, we're done
118
if base_sha == hexsha:
119
ie.text_size = base_ie.text_size
120
ie.text_sha1 = base_ie.text_sha1
121
ie.symlink_target = base_ie.symlink_target
122
ie.revision = base_ie.revision
124
blob = lookup_object(hexsha)
125
if ie.kind == "symlink":
126
ie.symlink_target = blob.data
130
ie.text_size = len(blob.data)
131
ie.text_sha1 = osutils.sha_string(blob.data)
132
# Check what revision we should store
134
for pinv in parent_invs:
135
if pinv.revision_id == base_inv.revision_id:
144
if pie.text_sha1 == ie.text_sha1:
145
# found a revision in one of the parents to use
146
ie.revision = pie.revision
148
parent_keys.append((file_id, pie.revision))
149
if ie.revision is None:
150
# Need to store a new revision
151
ie.revision = revision_id
152
assert file_id is not None
153
assert ie.revision is not None
154
texts.insert_record_stream([FulltextContentFactory((file_id, ie.revision), tuple(parent_keys), ie.text_sha1, blob.data)])
155
shamap = [(hexsha, "blob", (ie.file_id, ie.revision))]
158
if file_id in base_inv:
159
old_path = base_inv.id2path(file_id)
162
return ([(old_path, path, file_id, ie)], shamap)
165
def import_git_tree(texts, mapping, path, hexsha, base_inv, parent_id,
166
revision_id, parent_invs, shagitmap, lookup_object):
167
"""Import a git tree object into a bzr repository.
169
:param texts: VersionedFiles object to add to
170
:param path: Path in the tree
171
:param tree: A git tree object
172
:param base_inv: Base inventory against which to return inventory delta
173
:return: Inventory delta for this subtree
176
file_id = mapping.generate_file_id(path)
177
# We just have to hope this is indeed utf-8:
178
ie = InventoryDirectory(file_id, urlutils.basename(path.decode("utf-8")),
182
base_ie = base_inv[file_id]
184
# Newly appeared here
186
ie.revision = revision_id
187
texts.add_lines((file_id, ie.revision), (), [])
188
invdelta.append((None, path, file_id, ie))
190
base_sha = base_ie.text_id
191
# See if this has changed at all
194
base_sha = shagitmap.lookup_tree(file_id, base_inv.revision_id)
198
if base_sha == hexsha:
199
# If nothing has changed since the base revision, we're done
201
# Remember for next time
202
existing_children = set()
205
tree = lookup_object(hexsha)
206
for mode, name, child_hexsha in tree.entries():
207
basename = name.decode("utf-8")
208
existing_children.add(basename)
209
child_path = osutils.pathjoin(path, name)
210
if stat.S_ISDIR(mode):
211
subinvdelta, grandchildmodes, subshamap = import_git_tree(texts,
212
mapping, child_path, child_hexsha, base_inv, file_id,
213
revision_id, parent_invs, shagitmap, lookup_object)
214
invdelta.extend(subinvdelta)
215
child_modes.update(grandchildmodes)
216
shamap.extend(subshamap)
218
fs_mode = stat.S_IMODE(mode)
219
symlink = stat.S_ISLNK(mode)
220
subinvdelta, subshamap = import_git_blob(texts, mapping,
221
child_path, child_hexsha, base_inv, file_id, revision_id,
222
parent_invs, shagitmap, lookup_object,
223
bool(fs_mode & 0111), symlink)
224
invdelta.extend(subinvdelta)
225
shamap.extend(subshamap)
226
if mode not in (stat.S_IFDIR, DEFAULT_FILE_MODE,
227
stat.S_IFLNK, DEFAULT_FILE_MODE|0111):
228
child_modes[child_path] = mode
229
# Remove any children that have disappeared
230
if base_ie is not None:
231
deletable = [v for k,v in base_ie.children.iteritems() if k not in existing_children]
234
invdelta.append((base_inv.id2path(ie.file_id), None, ie.file_id, None))
235
if ie.kind == "directory":
236
deletable.extend(ie.children.values())
237
shamap.append((hexsha, "tree", (file_id, revision_id)))
238
return invdelta, child_modes, shamap
241
def import_git_objects(repo, mapping, object_iter, target_git_object_retriever,
243
"""Import a set of git objects into a bzr repository.
245
:param repo: Bazaar repository
246
:param mapping: Mapping to use
247
:param object_iter: Iterator over Git objects.
249
def lookup_object(sha):
251
return object_iter[sha]
253
return target_git_object_retriever[sha]
254
# TODO: a more (memory-)efficient implementation of this
260
parent_invs_cache = LRUCache(50)
261
# Find and convert commit objects
264
pb.update("finding revisions to fetch", len(graph), None)
266
assert isinstance(head, str)
268
o = lookup_object(head)
271
if isinstance(o, Commit):
272
rev = mapping.import_commit(o)
273
if repo.has_revision(rev.revision_id):
275
root_trees[rev.revision_id] = o.tree
276
revisions[rev.revision_id] = rev
277
graph.append((rev.revision_id, rev.parent_ids))
278
target_git_object_retriever._idmap.add_entry(o.id, "commit",
279
(rev.revision_id, o.tree))
280
heads.extend([p for p in o.parents if p not in checked])
281
elif isinstance(o, Tag):
282
heads.append(o.object[1])
284
trace.warning("Unable to import head object %r" % o)
286
# Order the revisions
287
# Create the inventory objects
288
for i, revid in enumerate(topo_sort(graph)):
290
pb.update("fetching revisions", i, len(graph))
291
rev = revisions[revid]
292
# We have to do this here, since we have to walk the tree and
293
# we need to make sure to import the blobs / trees with the right
294
# path; this may involve adding them more than once.
296
for parent_id in rev.parent_ids:
298
parent_invs.append(parent_invs_cache[parent_id])
300
parent_inv = repo.get_inventory(parent_id)
301
parent_invs.append(parent_inv)
302
parent_invs_cache[parent_id] = parent_inv
303
if parent_invs == []:
304
base_inv = Inventory(root_id=None)
306
base_inv = parent_invs[0]
307
inv_delta, unusual_modes, shamap = import_git_tree(repo.texts,
308
mapping, "", root_trees[revid], base_inv, None, revid,
309
parent_invs, target_git_object_retriever._idmap, lookup_object)
310
target_git_object_retriever._idmap.add_entries(shamap)
311
if unusual_modes != {}:
312
ret = "unusual modes: \n"
313
for item in unusual_modes.iteritems():
314
ret += "\t%s: %o\n" % item
315
raise AssertionError(ret)
317
basis_id = rev.parent_ids[0]
319
basis_id = NULL_REVISION
320
rev.inventory_sha1, inv = repo.add_inventory_by_delta(basis_id,
321
inv_delta, rev.revision_id, rev.parent_ids)
322
parent_invs_cache[rev.revision_id] = inv
323
repo.add_revision(rev.revision_id, rev)
324
if "verify" in debug.debug_flags:
325
objs = inventory_to_tree_and_blobs(inv, repo.texts, mapping)
326
for sha1, newobj, path in objs:
327
assert path is not None
328
oldobj = tree_lookup_path(lookup_object, root_trees[revid], path)
329
assert oldobj == newobj, "%r != %r in %s" % (oldobj, newobj, path)
331
target_git_object_retriever._idmap.commit()
334
class InterGitRepository(InterRepository):
336
_matching_repo_format = GitRepositoryFormat()
339
def _get_repo_format_to_test():
342
def copy_content(self, revision_id=None, pb=None):
343
"""See InterRepository.copy_content."""
344
self.fetch(revision_id, pb, find_ghosts=False)
346
def fetch(self, revision_id=None, pb=None, find_ghosts=False, mapping=None,
348
self.fetch_refs(revision_id=revision_id, pb=pb, find_ghosts=find_ghosts,
349
mapping=mapping, fetch_spec=fetch_spec)
352
class InterGitNonGitRepository(InterGitRepository):
353
"""Base InterRepository that copies revisions from a Git into a non-Git
356
def fetch_refs(self, revision_id=None, pb=None, find_ghosts=False,
357
mapping=None, fetch_spec=None):
359
mapping = self.source.get_mapping()
360
if revision_id is not None:
361
interesting_heads = [revision_id]
362
elif fetch_spec is not None:
363
interesting_heads = fetch_spec.heads
365
interesting_heads = None
367
def determine_wants(refs):
369
if interesting_heads is None:
370
ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
372
ret = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in interesting_heads if revid not in (None, NULL_REVISION)]
373
return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
374
self.fetch_objects(determine_wants, mapping, pb)
378
class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
379
"""InterRepository that copies revisions from a remote Git into a non-Git
382
def fetch_objects(self, determine_wants, mapping, pb=None):
384
pb.update("git: %s" % text.rstrip("\r\n"), 0, 0)
385
store = BazaarObjectStore(self.target, mapping)
386
self.target.lock_read()
388
heads = self.target.get_graph().heads(self.target.all_revision_ids())
391
graph_walker = store.get_graph_walker(
392
[store._lookup_revision_sha1(head) for head in heads])
395
create_pb = pb = ui.ui_factory.nested_progress_bar()
398
def record_determine_wants(heads):
399
wants = determine_wants(heads)
400
recorded_wants.extend(wants)
404
self.target.lock_write()
406
self.target.start_write_group()
408
objects_iter = self.source.fetch_objects(
409
record_determine_wants, graph_walker,
410
store.get_raw, progress)
411
import_git_objects(self.target, mapping, objects_iter,
412
store, recorded_wants, pb)
414
self.target.commit_write_group()
422
def is_compatible(source, target):
423
"""Be compatible with GitRepository."""
424
# FIXME: Also check target uses VersionedFile
425
return (isinstance(source, RemoteGitRepository) and
426
target.supports_rich_root() and
427
not isinstance(target, GitRepository))
430
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
431
"""InterRepository that copies revisions from a remote Git into a non-Git
434
def fetch_objects(self, determine_wants, mapping, pb=None):
435
wants = determine_wants(self.source._git.get_refs())
438
create_pb = pb = ui.ui_factory.nested_progress_bar()
439
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
441
self.target.lock_write()
443
self.target.start_write_group()
445
import_git_objects(self.target, mapping,
446
self.source._git.object_store,
447
target_git_object_retriever, wants, pb)
449
self.target.commit_write_group()
457
def is_compatible(source, target):
458
"""Be compatible with GitRepository."""
459
# FIXME: Also check target uses VersionedFile
460
return (isinstance(source, LocalGitRepository) and
461
target.supports_rich_root() and
462
not isinstance(target, GitRepository))
465
class InterGitGitRepository(InterGitRepository):
466
"""InterRepository that copies between Git repositories."""
468
def fetch_refs(self, revision_id=None, pb=None, find_ghosts=False,
469
mapping=None, fetch_spec=None, branches=None):
471
mapping = self.source.get_mapping()
473
trace.info("git: %s", text)
475
if revision_id is not None:
476
args = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
477
elif fetch_spec is not None:
478
args = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in fetch_spec.heads]
479
if branches is not None:
480
determine_wants = lambda x: [x[y] for y in branches if not x[y] in r.object_store]
481
elif fetch_spec is None and revision_id is None:
482
determine_wants = r.object_store.determine_wants_all
484
determine_wants = lambda x: [y for y in args if not y in r.object_store]
486
graphwalker = r.get_graph_walker()
487
f, commit = r.object_store.add_thin_pack()
489
refs = self.source.fetch_pack(determine_wants, graphwalker,
498
def is_compatible(source, target):
499
"""Be compatible with GitRepository."""
500
return (isinstance(source, GitRepository) and
501
isinstance(target, GitRepository))