1
# Copyright (C) 2005, 2006, 2007, 2008 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
18
from bzrlib.lazy_import import lazy_import
19
lazy_import(globals(), """
23
config as _mod_config,
29
revision as _mod_revision,
35
from bzrlib.config import BranchConfig
36
from bzrlib.tag import (
42
from bzrlib.decorators import needs_read_lock, needs_write_lock
43
from bzrlib.hooks import Hooks
44
from bzrlib.symbol_versioning import (
48
from bzrlib.trace import mutter, mutter_callsite, note, is_quiet
51
BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
52
BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
53
BZR_BRANCH_FORMAT_6 = "Bazaar Branch Format 6 (bzr 0.15)\n"
56
# TODO: Maybe include checks for common corruption of newlines, etc?
58
# TODO: Some operations like log might retrieve the same revisions
59
# repeatedly to calculate deltas. We could perhaps have a weakref
60
# cache in memory to make this faster. In general anything can be
61
# cached in memory between lock and unlock operations. .. nb thats
62
# what the transaction identity map provides
65
######################################################################
69
"""Branch holding a history of revisions.
72
Base directory/url of the branch.
74
hooks: An instance of BranchHooks.
76
# this is really an instance variable - FIXME move it there
80
# override this to set the strategy for storing tags
82
return DisabledTags(self)
84
def __init__(self, *ignored, **ignored_too):
85
self.tags = self._make_tags()
86
self._revision_history_cache = None
87
self._revision_id_to_revno_cache = None
88
self._last_revision_info_cache = None
91
"""Break a lock if one is present from another instance.
93
Uses the ui factory to ask for confirmation if the lock may be from
96
This will probe the repository for its lock as well.
98
self.control_files.break_lock()
99
self.repository.break_lock()
100
master = self.get_master_branch()
101
if master is not None:
105
def open(base, _unsupported=False, possible_transports=None):
106
"""Open the branch rooted at base.
108
For instance, if the branch is at URL/.bzr/branch,
109
Branch.open(URL) -> a Branch instance.
111
control = bzrdir.BzrDir.open(base, _unsupported,
112
possible_transports=possible_transports)
113
return control.open_branch(_unsupported)
116
def open_from_transport(transport, _unsupported=False):
117
"""Open the branch rooted at transport"""
118
control = bzrdir.BzrDir.open_from_transport(transport, _unsupported)
119
return control.open_branch(_unsupported)
122
def open_containing(url, possible_transports=None):
123
"""Open an existing branch which contains url.
125
This probes for a branch at url, and searches upwards from there.
127
Basically we keep looking up until we find the control directory or
128
run into the root. If there isn't one, raises NotBranchError.
129
If there is one and it is either an unrecognised format or an unsupported
130
format, UnknownFormatError or UnsupportedFormatError are raised.
131
If there is one, it is returned, along with the unused portion of url.
133
control, relpath = bzrdir.BzrDir.open_containing(url,
135
return control.open_branch(), relpath
137
def get_config(self):
138
return BranchConfig(self)
141
return self.get_config().get_nickname()
143
def _set_nick(self, nick):
144
self.get_config().set_user_option('nickname', nick, warn_masked=True)
146
nick = property(_get_nick, _set_nick)
149
raise NotImplementedError(self.is_locked)
151
def lock_write(self):
152
raise NotImplementedError(self.lock_write)
155
raise NotImplementedError(self.lock_read)
158
raise NotImplementedError(self.unlock)
160
def peek_lock_mode(self):
161
"""Return lock mode for the Branch: 'r', 'w' or None"""
162
raise NotImplementedError(self.peek_lock_mode)
164
def get_physical_lock_status(self):
165
raise NotImplementedError(self.get_physical_lock_status)
168
def get_revision_id_to_revno_map(self):
169
"""Return the revision_id => dotted revno map.
171
This will be regenerated on demand, but will be cached.
173
:return: A dictionary mapping revision_id => dotted revno.
174
This dictionary should not be modified by the caller.
176
if self._revision_id_to_revno_cache is not None:
177
mapping = self._revision_id_to_revno_cache
179
mapping = self._gen_revno_map()
180
self._cache_revision_id_to_revno(mapping)
181
# TODO: jam 20070417 Since this is being cached, should we be returning
183
# I would rather not, and instead just declare that users should not
184
# modify the return value.
187
def _gen_revno_map(self):
188
"""Create a new mapping from revision ids to dotted revnos.
190
Dotted revnos are generated based on the current tip in the revision
192
This is the worker function for get_revision_id_to_revno_map, which
193
just caches the return value.
195
:return: A dictionary mapping revision_id => dotted revno.
197
last_revision = self.last_revision()
198
revision_graph = repository._old_get_graph(self.repository,
200
merge_sorted_revisions = tsort.merge_sort(
205
revision_id_to_revno = dict((rev_id, revno)
206
for seq_num, rev_id, depth, revno, end_of_merge
207
in merge_sorted_revisions)
208
return revision_id_to_revno
210
def leave_lock_in_place(self):
211
"""Tell this branch object not to release the physical lock when this
214
If lock_write doesn't return a token, then this method is not supported.
216
self.control_files.leave_in_place()
218
def dont_leave_lock_in_place(self):
219
"""Tell this branch object to release the physical lock when this
220
object is unlocked, even if it didn't originally acquire it.
222
If lock_write doesn't return a token, then this method is not supported.
224
self.control_files.dont_leave_in_place()
226
@deprecated_method(deprecated_in((0, 16, 0)))
227
def abspath(self, name):
228
"""Return absolute filename for something in the branch
230
XXX: Robert Collins 20051017 what is this used for? why is it a branch
231
method and not a tree method.
233
raise NotImplementedError(self.abspath)
235
def bind(self, other):
236
"""Bind the local branch the other branch.
238
:param other: The branch to bind to
241
raise errors.UpgradeRequired(self.base)
244
def fetch(self, from_branch, last_revision=None, pb=None):
245
"""Copy revisions from from_branch into this branch.
247
:param from_branch: Where to copy from.
248
:param last_revision: What revision to stop at (None for at the end
250
:param pb: An optional progress bar to use.
252
Returns the copied revision count and the failed revisions in a tuple:
255
if self.base == from_branch.base:
258
nested_pb = ui.ui_factory.nested_progress_bar()
263
from_branch.lock_read()
265
if last_revision is None:
266
pb.update('get source history')
267
last_revision = from_branch.last_revision()
268
last_revision = _mod_revision.ensure_null(last_revision)
269
return self.repository.fetch(from_branch.repository,
270
revision_id=last_revision,
273
if nested_pb is not None:
277
def get_bound_location(self):
278
"""Return the URL of the branch we are bound to.
280
Older format branches cannot bind, please be sure to use a metadir
285
def get_old_bound_location(self):
286
"""Return the URL of the branch we used to be bound to
288
raise errors.UpgradeRequired(self.base)
290
def get_commit_builder(self, parents, config=None, timestamp=None,
291
timezone=None, committer=None, revprops=None,
293
"""Obtain a CommitBuilder for this branch.
295
:param parents: Revision ids of the parents of the new revision.
296
:param config: Optional configuration to use.
297
:param timestamp: Optional timestamp recorded for commit.
298
:param timezone: Optional timezone for timestamp.
299
:param committer: Optional committer to set for commit.
300
:param revprops: Optional dictionary of revision properties.
301
:param revision_id: Optional revision id.
305
config = self.get_config()
307
return self.repository.get_commit_builder(self, parents, config,
308
timestamp, timezone, committer, revprops, revision_id)
310
def get_master_branch(self, possible_transports=None):
311
"""Return the branch we are bound to.
313
:return: Either a Branch, or None
317
def get_revision_delta(self, revno):
318
"""Return the delta for one revision.
320
The delta is relative to its mainline predecessor, or the
321
empty tree for revision 1.
323
rh = self.revision_history()
324
if not (1 <= revno <= len(rh)):
325
raise errors.InvalidRevisionNumber(revno)
326
return self.repository.get_revision_delta(rh[revno-1])
328
def print_file(self, file, revision_id):
329
"""Print `file` to stdout."""
330
raise NotImplementedError(self.print_file)
332
def set_revision_history(self, rev_history):
333
raise NotImplementedError(self.set_revision_history)
335
def _cache_revision_history(self, rev_history):
336
"""Set the cached revision history to rev_history.
338
The revision_history method will use this cache to avoid regenerating
339
the revision history.
341
This API is semi-public; it only for use by subclasses, all other code
342
should consider it to be private.
344
self._revision_history_cache = rev_history
346
def _cache_revision_id_to_revno(self, revision_id_to_revno):
347
"""Set the cached revision_id => revno map to revision_id_to_revno.
349
This API is semi-public; it only for use by subclasses, all other code
350
should consider it to be private.
352
self._revision_id_to_revno_cache = revision_id_to_revno
354
def _clear_cached_state(self):
355
"""Clear any cached data on this branch, e.g. cached revision history.
357
This means the next call to revision_history will need to call
358
_gen_revision_history.
360
This API is semi-public; it only for use by subclasses, all other code
361
should consider it to be private.
363
self._revision_history_cache = None
364
self._revision_id_to_revno_cache = None
365
self._last_revision_info_cache = None
367
def _gen_revision_history(self):
368
"""Return sequence of revision hashes on to this branch.
370
Unlike revision_history, this method always regenerates or rereads the
371
revision history, i.e. it does not cache the result, so repeated calls
374
Concrete subclasses should override this instead of revision_history so
375
that subclasses do not need to deal with caching logic.
377
This API is semi-public; it only for use by subclasses, all other code
378
should consider it to be private.
380
raise NotImplementedError(self._gen_revision_history)
383
def revision_history(self):
384
"""Return sequence of revision ids on this branch.
386
This method will cache the revision history for as long as it is safe to
389
if 'evil' in debug.debug_flags:
390
mutter_callsite(3, "revision_history scales with history.")
391
if self._revision_history_cache is not None:
392
history = self._revision_history_cache
394
history = self._gen_revision_history()
395
self._cache_revision_history(history)
399
"""Return current revision number for this branch.
401
That is equivalent to the number of revisions committed to
404
return self.last_revision_info()[0]
407
"""Older format branches cannot bind or unbind."""
408
raise errors.UpgradeRequired(self.base)
410
def set_append_revisions_only(self, enabled):
411
"""Older format branches are never restricted to append-only"""
412
raise errors.UpgradeRequired(self.base)
414
def last_revision(self):
415
"""Return last revision id, or NULL_REVISION."""
416
return self.last_revision_info()[1]
419
def last_revision_info(self):
420
"""Return information about the last revision.
422
:return: A tuple (revno, revision_id).
424
if self._last_revision_info_cache is None:
425
self._last_revision_info_cache = self._last_revision_info()
426
return self._last_revision_info_cache
428
def _last_revision_info(self):
429
rh = self.revision_history()
432
return (revno, rh[-1])
434
return (0, _mod_revision.NULL_REVISION)
436
@deprecated_method(deprecated_in((1, 6, 0)))
437
def missing_revisions(self, other, stop_revision=None):
438
"""Return a list of new revisions that would perfectly fit.
440
If self and other have not diverged, return a list of the revisions
441
present in other, but missing from self.
443
self_history = self.revision_history()
444
self_len = len(self_history)
445
other_history = other.revision_history()
446
other_len = len(other_history)
447
common_index = min(self_len, other_len) -1
448
if common_index >= 0 and \
449
self_history[common_index] != other_history[common_index]:
450
raise errors.DivergedBranches(self, other)
452
if stop_revision is None:
453
stop_revision = other_len
455
if stop_revision > other_len:
456
raise errors.NoSuchRevision(self, stop_revision)
457
return other_history[self_len:stop_revision]
460
def update_revisions(self, other, stop_revision=None, overwrite=False,
462
"""Pull in new perfect-fit revisions.
464
:param other: Another Branch to pull from
465
:param stop_revision: Updated until the given revision
466
:param overwrite: Always set the branch pointer, rather than checking
467
to see if it is a proper descendant.
468
:param graph: A Graph object that can be used to query history
469
information. This can be None.
474
other_revno, other_last_revision = other.last_revision_info()
475
stop_revno = None # unknown
476
if stop_revision is None:
477
stop_revision = other_last_revision
478
if _mod_revision.is_null(stop_revision):
479
# if there are no commits, we're done.
481
stop_revno = other_revno
483
# what's the current last revision, before we fetch [and change it
485
last_rev = _mod_revision.ensure_null(self.last_revision())
486
# we fetch here so that we don't process data twice in the common
487
# case of having something to pull, and so that the check for
488
# already merged can operate on the just fetched graph, which will
489
# be cached in memory.
490
self.fetch(other, stop_revision)
491
# Check to see if one is an ancestor of the other
494
graph = self.repository.get_graph()
495
if self._check_if_descendant_or_diverged(
496
stop_revision, last_rev, graph, other):
497
# stop_revision is a descendant of last_rev, but we aren't
498
# overwriting, so we're done.
500
if stop_revno is None:
502
graph = self.repository.get_graph()
503
this_revno, this_last_revision = self.last_revision_info()
504
stop_revno = graph.find_distance_to_null(stop_revision,
505
[(other_last_revision, other_revno),
506
(this_last_revision, this_revno)])
507
self.set_last_revision_info(stop_revno, stop_revision)
513
def revision_id_to_revno(self, revision_id):
514
"""Given a revision id, return its revno"""
515
if _mod_revision.is_null(revision_id):
517
history = self.revision_history()
519
return history.index(revision_id) + 1
521
raise errors.NoSuchRevision(self, revision_id)
523
def get_rev_id(self, revno, history=None):
524
"""Find the revision id of the specified revno."""
526
return _mod_revision.NULL_REVISION
528
history = self.revision_history()
529
if revno <= 0 or revno > len(history):
530
raise errors.NoSuchRevision(self, revno)
531
return history[revno - 1]
533
def pull(self, source, overwrite=False, stop_revision=None,
534
possible_transports=None, _override_hook_target=None):
535
"""Mirror source into this branch.
537
This branch is considered to be 'local', having low latency.
539
:returns: PullResult instance
541
raise NotImplementedError(self.pull)
543
def push(self, target, overwrite=False, stop_revision=None):
544
"""Mirror this branch into target.
546
This branch is considered to be 'local', having low latency.
548
raise NotImplementedError(self.push)
550
def basis_tree(self):
551
"""Return `Tree` object for last revision."""
552
return self.repository.revision_tree(self.last_revision())
554
def rename_one(self, from_rel, to_rel):
557
This can change the directory or the filename or both.
559
raise NotImplementedError(self.rename_one)
561
def move(self, from_paths, to_name):
564
to_name must exist as a versioned directory.
566
If to_name exists and is a directory, the files are moved into
567
it, keeping their old names. If it is a directory,
569
Note that to_name is only the last component of the new name;
570
this doesn't change the directory.
572
This returns a list of (from_path, to_path) pairs for each
575
raise NotImplementedError(self.move)
577
def get_parent(self):
578
"""Return the parent location of the branch.
580
This is the default location for push/pull/missing. The usual
581
pattern is that the user can override it by specifying a
584
raise NotImplementedError(self.get_parent)
586
def _set_config_location(self, name, url, config=None,
587
make_relative=False):
589
config = self.get_config()
593
url = urlutils.relative_url(self.base, url)
594
config.set_user_option(name, url, warn_masked=True)
596
def _get_config_location(self, name, config=None):
598
config = self.get_config()
599
location = config.get_user_option(name)
604
def get_submit_branch(self):
605
"""Return the submit location of the branch.
607
This is the default location for bundle. The usual
608
pattern is that the user can override it by specifying a
611
return self.get_config().get_user_option('submit_branch')
613
def set_submit_branch(self, location):
614
"""Return the submit location of the branch.
616
This is the default location for bundle. The usual
617
pattern is that the user can override it by specifying a
620
self.get_config().set_user_option('submit_branch', location,
623
def get_public_branch(self):
624
"""Return the public location of the branch.
626
This is is used by merge directives.
628
return self._get_config_location('public_branch')
630
def set_public_branch(self, location):
631
"""Return the submit location of the branch.
633
This is the default location for bundle. The usual
634
pattern is that the user can override it by specifying a
637
self._set_config_location('public_branch', location)
639
def get_push_location(self):
640
"""Return the None or the location to push this branch to."""
641
push_loc = self.get_config().get_user_option('push_location')
644
def set_push_location(self, location):
645
"""Set a new push location for this branch."""
646
raise NotImplementedError(self.set_push_location)
648
def set_parent(self, url):
649
raise NotImplementedError(self.set_parent)
653
"""Synchronise this branch with the master branch if any.
655
:return: None or the last_revision pivoted out during the update.
659
def check_revno(self, revno):
661
Check whether a revno corresponds to any revision.
662
Zero (the NULL revision) is considered valid.
665
self.check_real_revno(revno)
667
def check_real_revno(self, revno):
669
Check whether a revno corresponds to a real revision.
670
Zero (the NULL revision) is considered invalid
672
if revno < 1 or revno > self.revno():
673
raise errors.InvalidRevisionNumber(revno)
676
def clone(self, to_bzrdir, revision_id=None):
677
"""Clone this branch into to_bzrdir preserving all semantic values.
679
revision_id: if not None, the revision history in the new branch will
680
be truncated to end with revision_id.
682
result = self._format.initialize(to_bzrdir)
683
self.copy_content_into(result, revision_id=revision_id)
687
def sprout(self, to_bzrdir, revision_id=None):
688
"""Create a new line of development from the branch, into to_bzrdir.
690
revision_id: if not None, the revision history in the new branch will
691
be truncated to end with revision_id.
693
result = self._format.initialize(to_bzrdir)
694
self.copy_content_into(result, revision_id=revision_id)
695
result.set_parent(self.bzrdir.root_transport.base)
698
def _synchronize_history(self, destination, revision_id):
699
"""Synchronize last revision and revision history between branches.
701
This version is most efficient when the destination is also a
702
BzrBranch5, but works for BzrBranch6 as long as the revision
703
history is the true lefthand parent history, and all of the revisions
704
are in the destination's repository. If not, set_revision_history
707
:param destination: The branch to copy the history into
708
:param revision_id: The revision-id to truncate history at. May
709
be None to copy complete history.
711
if revision_id == _mod_revision.NULL_REVISION:
713
new_history = self.revision_history()
714
if revision_id is not None and new_history != []:
716
new_history = new_history[:new_history.index(revision_id) + 1]
718
rev = self.repository.get_revision(revision_id)
719
new_history = rev.get_history(self.repository)[1:]
720
destination.set_revision_history(new_history)
723
def copy_content_into(self, destination, revision_id=None):
724
"""Copy the content of self into destination.
726
revision_id: if not None, the revision history in the new branch will
727
be truncated to end with revision_id.
729
self._synchronize_history(destination, revision_id)
731
parent = self.get_parent()
732
except errors.InaccessibleParent, e:
733
mutter('parent was not accessible to copy: %s', e)
736
destination.set_parent(parent)
737
self.tags.merge_to(destination.tags)
741
"""Check consistency of the branch.
743
In particular this checks that revisions given in the revision-history
744
do actually match up in the revision graph, and that they're all
745
present in the repository.
747
Callers will typically also want to check the repository.
749
:return: A BranchCheckResult.
751
mainline_parent_id = None
752
last_revno, last_revision_id = self.last_revision_info()
753
real_rev_history = list(self.repository.iter_reverse_revision_history(
755
real_rev_history.reverse()
756
if len(real_rev_history) != last_revno:
757
raise errors.BzrCheckError('revno does not match len(mainline)'
758
' %s != %s' % (last_revno, len(real_rev_history)))
759
# TODO: We should probably also check that real_rev_history actually
760
# matches self.revision_history()
761
for revision_id in real_rev_history:
763
revision = self.repository.get_revision(revision_id)
764
except errors.NoSuchRevision, e:
765
raise errors.BzrCheckError("mainline revision {%s} not in repository"
767
# In general the first entry on the revision history has no parents.
768
# But it's not illegal for it to have parents listed; this can happen
769
# in imports from Arch when the parents weren't reachable.
770
if mainline_parent_id is not None:
771
if mainline_parent_id not in revision.parent_ids:
772
raise errors.BzrCheckError("previous revision {%s} not listed among "
774
% (mainline_parent_id, revision_id))
775
mainline_parent_id = revision_id
776
return BranchCheckResult(self)
778
def _get_checkout_format(self):
779
"""Return the most suitable metadir for a checkout of this branch.
780
Weaves are used if this branch's repository uses weaves.
782
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
783
from bzrlib.repofmt import weaverepo
784
format = bzrdir.BzrDirMetaFormat1()
785
format.repository_format = weaverepo.RepositoryFormat7()
787
format = self.repository.bzrdir.checkout_metadir()
788
format.set_branch_format(self._format)
791
def create_checkout(self, to_location, revision_id=None,
792
lightweight=False, accelerator_tree=None,
794
"""Create a checkout of a branch.
796
:param to_location: The url to produce the checkout at
797
:param revision_id: The revision to check out
798
:param lightweight: If True, produce a lightweight checkout, otherwise,
799
produce a bound branch (heavyweight checkout)
800
:param accelerator_tree: A tree which can be used for retrieving file
801
contents more quickly than the revision tree, i.e. a workingtree.
802
The revision tree will be used for cases where accelerator_tree's
803
content is different.
804
:param hardlink: If true, hard-link files from accelerator_tree,
806
:return: The tree of the created checkout
808
t = transport.get_transport(to_location)
811
format = self._get_checkout_format()
812
checkout = format.initialize_on_transport(t)
813
from_branch = BranchReferenceFormat().initialize(checkout, self)
815
format = self._get_checkout_format()
816
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
817
to_location, force_new_tree=False, format=format)
818
checkout = checkout_branch.bzrdir
819
checkout_branch.bind(self)
820
# pull up to the specified revision_id to set the initial
821
# branch tip correctly, and seed it with history.
822
checkout_branch.pull(self, stop_revision=revision_id)
824
tree = checkout.create_workingtree(revision_id,
825
from_branch=from_branch,
826
accelerator_tree=accelerator_tree,
828
basis_tree = tree.basis_tree()
829
basis_tree.lock_read()
831
for path, file_id in basis_tree.iter_references():
832
reference_parent = self.reference_parent(file_id, path)
833
reference_parent.create_checkout(tree.abspath(path),
834
basis_tree.get_reference_revision(file_id, path),
841
def reconcile(self, thorough=True):
842
"""Make sure the data stored in this branch is consistent."""
843
from bzrlib.reconcile import BranchReconciler
844
reconciler = BranchReconciler(self, thorough=thorough)
845
reconciler.reconcile()
848
def reference_parent(self, file_id, path):
849
"""Return the parent branch for a tree-reference file_id
850
:param file_id: The file_id of the tree reference
851
:param path: The path of the file_id in the tree
852
:return: A branch associated with the file_id
854
# FIXME should provide multiple branches, based on config
855
return Branch.open(self.bzrdir.root_transport.clone(path).base)
857
def supports_tags(self):
858
return self._format.supports_tags()
860
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
862
"""Ensure that revision_b is a descendant of revision_a.
864
This is a helper function for update_revisions.
866
:raises: DivergedBranches if revision_b has diverged from revision_a.
867
:returns: True if revision_b is a descendant of revision_a.
869
relation = self._revision_relations(revision_a, revision_b, graph)
870
if relation == 'b_descends_from_a':
872
elif relation == 'diverged':
873
raise errors.DivergedBranches(self, other_branch)
874
elif relation == 'a_descends_from_b':
877
raise AssertionError("invalid heads: %r" % heads)
879
def _revision_relations(self, revision_a, revision_b, graph):
880
"""Determine the relationship between two revisions.
882
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
884
heads = graph.heads([revision_a, revision_b])
885
if heads == set([revision_b]):
886
return 'b_descends_from_a'
887
elif heads == set([revision_a, revision_b]):
888
# These branches have diverged
890
elif heads == set([revision_a]):
891
return 'a_descends_from_b'
893
raise AssertionError("invalid heads: %r" % heads)
896
class BranchFormat(object):
897
"""An encapsulation of the initialization and open routines for a format.
899
Formats provide three things:
900
* An initialization routine,
904
Formats are placed in an dict by their format string for reference
905
during branch opening. Its not required that these be instances, they
906
can be classes themselves with class methods - it simply depends on
907
whether state is needed for a given format or not.
909
Once a format is deprecated, just deprecate the initialize and open
910
methods on the format class. Do not deprecate the object, as the
911
object will be created every time regardless.
914
_default_format = None
915
"""The default format used for new branches."""
918
"""The known formats."""
920
def __eq__(self, other):
921
return self.__class__ is other.__class__
923
def __ne__(self, other):
924
return not (self == other)
927
def find_format(klass, a_bzrdir):
928
"""Return the format for the branch object in a_bzrdir."""
930
transport = a_bzrdir.get_branch_transport(None)
931
format_string = transport.get("format").read()
932
return klass._formats[format_string]
933
except errors.NoSuchFile:
934
raise errors.NotBranchError(path=transport.base)
936
raise errors.UnknownFormatError(format=format_string, kind='branch')
939
def get_default_format(klass):
940
"""Return the current default format."""
941
return klass._default_format
943
def get_reference(self, a_bzrdir):
944
"""Get the target reference of the branch in a_bzrdir.
946
format probing must have been completed before calling
947
this method - it is assumed that the format of the branch
948
in a_bzrdir is correct.
950
:param a_bzrdir: The bzrdir to get the branch data from.
951
:return: None if the branch is not a reference branch.
956
def set_reference(self, a_bzrdir, to_branch):
957
"""Set the target reference of the branch in a_bzrdir.
959
format probing must have been completed before calling
960
this method - it is assumed that the format of the branch
961
in a_bzrdir is correct.
963
:param a_bzrdir: The bzrdir to set the branch reference for.
964
:param to_branch: branch that the checkout is to reference
966
raise NotImplementedError(self.set_reference)
968
def get_format_string(self):
969
"""Return the ASCII format string that identifies this format."""
970
raise NotImplementedError(self.get_format_string)
972
def get_format_description(self):
973
"""Return the short format description for this format."""
974
raise NotImplementedError(self.get_format_description)
976
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
978
"""Initialize a branch in a bzrdir, with specified files
980
:param a_bzrdir: The bzrdir to initialize the branch in
981
:param utf8_files: The files to create as a list of
982
(filename, content) tuples
983
:param set_format: If True, set the format with
984
self.get_format_string. (BzrBranch4 has its format set
986
:return: a branch in this format
988
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
989
branch_transport = a_bzrdir.get_branch_transport(self)
991
'metadir': ('lock', lockdir.LockDir),
992
'branch4': ('branch-lock', lockable_files.TransportLock),
994
lock_name, lock_class = lock_map[lock_type]
995
control_files = lockable_files.LockableFiles(branch_transport,
996
lock_name, lock_class)
997
control_files.create_lock()
998
control_files.lock_write()
1000
utf8_files += [('format', self.get_format_string())]
1002
for (filename, content) in utf8_files:
1003
branch_transport.put_bytes(
1005
mode=a_bzrdir._get_file_mode())
1007
control_files.unlock()
1008
return self.open(a_bzrdir, _found=True)
1010
def initialize(self, a_bzrdir):
1011
"""Create a branch of this format in a_bzrdir."""
1012
raise NotImplementedError(self.initialize)
1014
def is_supported(self):
1015
"""Is this format supported?
1017
Supported formats can be initialized and opened.
1018
Unsupported formats may not support initialization or committing or
1019
some other features depending on the reason for not being supported.
1023
def open(self, a_bzrdir, _found=False):
1024
"""Return the branch object for a_bzrdir
1026
_found is a private parameter, do not use it. It is used to indicate
1027
if format probing has already be done.
1029
raise NotImplementedError(self.open)
1032
def register_format(klass, format):
1033
klass._formats[format.get_format_string()] = format
1036
def set_default_format(klass, format):
1037
klass._default_format = format
1040
def unregister_format(klass, format):
1041
del klass._formats[format.get_format_string()]
1044
return self.get_format_string().rstrip()
1046
def supports_tags(self):
1047
"""True if this format supports tags stored in the branch"""
1048
return False # by default
1051
class BranchHooks(Hooks):
1052
"""A dictionary mapping hook name to a list of callables for branch hooks.
1054
e.g. ['set_rh'] Is the list of items to be called when the
1055
set_revision_history function is invoked.
1059
"""Create the default hooks.
1061
These are all empty initially, because by default nothing should get
1064
Hooks.__init__(self)
1065
# Introduced in 0.15:
1066
# invoked whenever the revision history has been set
1067
# with set_revision_history. The api signature is
1068
# (branch, revision_history), and the branch will
1071
# invoked after a push operation completes.
1072
# the api signature is
1074
# containing the members
1075
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1076
# where local is the local target branch or None, master is the target
1077
# master branch, and the rest should be self explanatory. The source
1078
# is read locked and the target branches write locked. Source will
1079
# be the local low-latency branch.
1080
self['post_push'] = []
1081
# invoked after a pull operation completes.
1082
# the api signature is
1084
# containing the members
1085
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1086
# where local is the local branch or None, master is the target
1087
# master branch, and the rest should be self explanatory. The source
1088
# is read locked and the target branches write locked. The local
1089
# branch is the low-latency branch.
1090
self['post_pull'] = []
1091
# invoked before a commit operation takes place.
1092
# the api signature is
1093
# (local, master, old_revno, old_revid, future_revno, future_revid,
1094
# tree_delta, future_tree).
1095
# old_revid is NULL_REVISION for the first commit to a branch
1096
# tree_delta is a TreeDelta object describing changes from the basis
1097
# revision, hooks MUST NOT modify this delta
1098
# future_tree is an in-memory tree obtained from
1099
# CommitBuilder.revision_tree() and hooks MUST NOT modify this tree
1100
self['pre_commit'] = []
1101
# invoked after a commit operation completes.
1102
# the api signature is
1103
# (local, master, old_revno, old_revid, new_revno, new_revid)
1104
# old_revid is NULL_REVISION for the first commit to a branch.
1105
self['post_commit'] = []
1106
# invoked after a uncommit operation completes.
1107
# the api signature is
1108
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1109
# local is the local branch or None, master is the target branch,
1110
# and an empty branch recieves new_revno of 0, new_revid of None.
1111
self['post_uncommit'] = []
1113
# Invoked after the tip of a branch changes.
1114
# the api signature is
1115
# (params) where params is a ChangeBranchTipParams with the members
1116
# (branch, old_revno, new_revno, old_revid, new_revid)
1117
self['post_change_branch_tip'] = []
1120
# install the default hooks into the Branch class.
1121
Branch.hooks = BranchHooks()
1124
class ChangeBranchTipParams(object):
1125
"""Object holding parameters passed to *_change_branch_tip hooks.
1127
There are 5 fields that hooks may wish to access:
1129
:ivar branch: the branch being changed
1130
:ivar old_revno: revision number before the change
1131
:ivar new_revno: revision number after the change
1132
:ivar old_revid: revision id before the change
1133
:ivar new_revid: revision id after the change
1135
The revid fields are strings. The revno fields are integers.
1138
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1139
"""Create a group of ChangeBranchTip parameters.
1141
:param branch: The branch being changed.
1142
:param old_revno: Revision number before the change.
1143
:param new_revno: Revision number after the change.
1144
:param old_revid: Tip revision id before the change.
1145
:param new_revid: Tip revision id after the change.
1147
self.branch = branch
1148
self.old_revno = old_revno
1149
self.new_revno = new_revno
1150
self.old_revid = old_revid
1151
self.new_revid = new_revid
1154
class BzrBranchFormat4(BranchFormat):
1155
"""Bzr branch format 4.
1158
- a revision-history file.
1159
- a branch-lock lock file [ to be shared with the bzrdir ]
1162
def get_format_description(self):
1163
"""See BranchFormat.get_format_description()."""
1164
return "Branch format 4"
1166
def initialize(self, a_bzrdir):
1167
"""Create a branch of this format in a_bzrdir."""
1168
utf8_files = [('revision-history', ''),
1169
('branch-name', ''),
1171
return self._initialize_helper(a_bzrdir, utf8_files,
1172
lock_type='branch4', set_format=False)
1175
super(BzrBranchFormat4, self).__init__()
1176
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1178
def open(self, a_bzrdir, _found=False):
1179
"""Return the branch object for a_bzrdir
1181
_found is a private parameter, do not use it. It is used to indicate
1182
if format probing has already be done.
1185
# we are being called directly and must probe.
1186
raise NotImplementedError
1187
return BzrBranch(_format=self,
1188
_control_files=a_bzrdir._control_files,
1190
_repository=a_bzrdir.open_repository())
1193
return "Bazaar-NG branch format 4"
1196
class BzrBranchFormat5(BranchFormat):
1197
"""Bzr branch format 5.
1200
- a revision-history file.
1202
- a lock dir guarding the branch itself
1203
- all of this stored in a branch/ subdirectory
1204
- works with shared repositories.
1206
This format is new in bzr 0.8.
1209
def get_format_string(self):
1210
"""See BranchFormat.get_format_string()."""
1211
return "Bazaar-NG branch format 5\n"
1213
def get_format_description(self):
1214
"""See BranchFormat.get_format_description()."""
1215
return "Branch format 5"
1217
def initialize(self, a_bzrdir):
1218
"""Create a branch of this format in a_bzrdir."""
1219
utf8_files = [('revision-history', ''),
1220
('branch-name', ''),
1222
return self._initialize_helper(a_bzrdir, utf8_files)
1225
super(BzrBranchFormat5, self).__init__()
1226
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1228
def open(self, a_bzrdir, _found=False):
1229
"""Return the branch object for a_bzrdir
1231
_found is a private parameter, do not use it. It is used to indicate
1232
if format probing has already be done.
1235
format = BranchFormat.find_format(a_bzrdir)
1236
if format.__class__ != self.__class__:
1237
raise AssertionError("wrong format %r found for %r" %
1240
transport = a_bzrdir.get_branch_transport(None)
1241
control_files = lockable_files.LockableFiles(transport, 'lock',
1243
return BzrBranch5(_format=self,
1244
_control_files=control_files,
1246
_repository=a_bzrdir.find_repository())
1247
except errors.NoSuchFile:
1248
raise errors.NotBranchError(path=transport.base)
1251
class BzrBranchFormat6(BzrBranchFormat5):
1252
"""Branch format with last-revision and tags.
1254
Unlike previous formats, this has no explicit revision history. Instead,
1255
this just stores the last-revision, and the left-hand history leading
1256
up to there is the history.
1258
This format was introduced in bzr 0.15
1259
and became the default in 0.91.
1262
def get_format_string(self):
1263
"""See BranchFormat.get_format_string()."""
1264
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1266
def get_format_description(self):
1267
"""See BranchFormat.get_format_description()."""
1268
return "Branch format 6"
1270
def initialize(self, a_bzrdir):
1271
"""Create a branch of this format in a_bzrdir."""
1272
utf8_files = [('last-revision', '0 null:\n'),
1273
('branch.conf', ''),
1276
return self._initialize_helper(a_bzrdir, utf8_files)
1278
def open(self, a_bzrdir, _found=False):
1279
"""Return the branch object for a_bzrdir
1281
_found is a private parameter, do not use it. It is used to indicate
1282
if format probing has already be done.
1285
format = BranchFormat.find_format(a_bzrdir)
1286
if format.__class__ != self.__class__:
1287
raise AssertionError("wrong format %r found for %r" %
1289
transport = a_bzrdir.get_branch_transport(None)
1290
control_files = lockable_files.LockableFiles(transport, 'lock',
1292
return BzrBranch6(_format=self,
1293
_control_files=control_files,
1295
_repository=a_bzrdir.find_repository())
1297
def supports_tags(self):
1301
class BranchReferenceFormat(BranchFormat):
1302
"""Bzr branch reference format.
1304
Branch references are used in implementing checkouts, they
1305
act as an alias to the real branch which is at some other url.
1312
def get_format_string(self):
1313
"""See BranchFormat.get_format_string()."""
1314
return "Bazaar-NG Branch Reference Format 1\n"
1316
def get_format_description(self):
1317
"""See BranchFormat.get_format_description()."""
1318
return "Checkout reference format 1"
1320
def get_reference(self, a_bzrdir):
1321
"""See BranchFormat.get_reference()."""
1322
transport = a_bzrdir.get_branch_transport(None)
1323
return transport.get('location').read()
1325
def set_reference(self, a_bzrdir, to_branch):
1326
"""See BranchFormat.set_reference()."""
1327
transport = a_bzrdir.get_branch_transport(None)
1328
location = transport.put_bytes('location', to_branch.base)
1330
def initialize(self, a_bzrdir, target_branch=None):
1331
"""Create a branch of this format in a_bzrdir."""
1332
if target_branch is None:
1333
# this format does not implement branch itself, thus the implicit
1334
# creation contract must see it as uninitializable
1335
raise errors.UninitializableFormat(self)
1336
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1337
branch_transport = a_bzrdir.get_branch_transport(self)
1338
branch_transport.put_bytes('location',
1339
target_branch.bzrdir.root_transport.base)
1340
branch_transport.put_bytes('format', self.get_format_string())
1342
a_bzrdir, _found=True,
1343
possible_transports=[target_branch.bzrdir.root_transport])
1346
super(BranchReferenceFormat, self).__init__()
1347
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1349
def _make_reference_clone_function(format, a_branch):
1350
"""Create a clone() routine for a branch dynamically."""
1351
def clone(to_bzrdir, revision_id=None):
1352
"""See Branch.clone()."""
1353
return format.initialize(to_bzrdir, a_branch)
1354
# cannot obey revision_id limits when cloning a reference ...
1355
# FIXME RBC 20060210 either nuke revision_id for clone, or
1356
# emit some sort of warning/error to the caller ?!
1359
def open(self, a_bzrdir, _found=False, location=None,
1360
possible_transports=None):
1361
"""Return the branch that the branch reference in a_bzrdir points at.
1363
_found is a private parameter, do not use it. It is used to indicate
1364
if format probing has already be done.
1367
format = BranchFormat.find_format(a_bzrdir)
1368
if format.__class__ != self.__class__:
1369
raise AssertionError("wrong format %r found for %r" %
1371
if location is None:
1372
location = self.get_reference(a_bzrdir)
1373
real_bzrdir = bzrdir.BzrDir.open(
1374
location, possible_transports=possible_transports)
1375
result = real_bzrdir.open_branch()
1376
# this changes the behaviour of result.clone to create a new reference
1377
# rather than a copy of the content of the branch.
1378
# I did not use a proxy object because that needs much more extensive
1379
# testing, and we are only changing one behaviour at the moment.
1380
# If we decide to alter more behaviours - i.e. the implicit nickname
1381
# then this should be refactored to introduce a tested proxy branch
1382
# and a subclass of that for use in overriding clone() and ....
1384
result.clone = self._make_reference_clone_function(result)
1388
# formats which have no format string are not discoverable
1389
# and not independently creatable, so are not registered.
1390
__format5 = BzrBranchFormat5()
1391
__format6 = BzrBranchFormat6()
1392
BranchFormat.register_format(__format5)
1393
BranchFormat.register_format(BranchReferenceFormat())
1394
BranchFormat.register_format(__format6)
1395
BranchFormat.set_default_format(__format6)
1396
_legacy_formats = [BzrBranchFormat4(),
1399
class BzrBranch(Branch):
1400
"""A branch stored in the actual filesystem.
1402
Note that it's "local" in the context of the filesystem; it doesn't
1403
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1404
it's writable, and can be accessed via the normal filesystem API.
1406
:ivar _transport: Transport for file operations on this branch's
1407
control files, typically pointing to the .bzr/branch directory.
1408
:ivar repository: Repository for this branch.
1409
:ivar base: The url of the base directory for this branch; the one
1410
containing the .bzr directory.
1413
def __init__(self, _format=None,
1414
_control_files=None, a_bzrdir=None, _repository=None):
1415
"""Create new branch object at a particular location."""
1416
Branch.__init__(self)
1417
if a_bzrdir is None:
1418
raise ValueError('a_bzrdir must be supplied')
1420
self.bzrdir = a_bzrdir
1421
self._base = self.bzrdir.transport.clone('..').base
1422
# XXX: We should be able to just do
1423
# self.base = self.bzrdir.root_transport.base
1424
# but this does not quite work yet -- mbp 20080522
1425
self._format = _format
1426
if _control_files is None:
1427
raise ValueError('BzrBranch _control_files is None')
1428
self.control_files = _control_files
1429
self._transport = _control_files._transport
1430
self.repository = _repository
1433
return '%s(%r)' % (self.__class__.__name__, self.base)
1437
def _get_base(self):
1438
"""Returns the directory containing the control directory."""
1441
base = property(_get_base, doc="The URL for the root of this branch.")
1443
@deprecated_method(deprecated_in((0, 16, 0)))
1444
def abspath(self, name):
1445
"""See Branch.abspath."""
1446
return self._transport.abspath(name)
1448
def is_locked(self):
1449
return self.control_files.is_locked()
1451
def lock_write(self, token=None):
1452
repo_token = self.repository.lock_write()
1454
token = self.control_files.lock_write(token=token)
1456
self.repository.unlock()
1460
def lock_read(self):
1461
self.repository.lock_read()
1463
self.control_files.lock_read()
1465
self.repository.unlock()
1469
# TODO: test for failed two phase locks. This is known broken.
1471
self.control_files.unlock()
1473
self.repository.unlock()
1474
if not self.control_files.is_locked():
1475
# we just released the lock
1476
self._clear_cached_state()
1478
def peek_lock_mode(self):
1479
if self.control_files._lock_count == 0:
1482
return self.control_files._lock_mode
1484
def get_physical_lock_status(self):
1485
return self.control_files.get_physical_lock_status()
1488
def print_file(self, file, revision_id):
1489
"""See Branch.print_file."""
1490
return self.repository.print_file(file, revision_id)
1492
def _write_revision_history(self, history):
1493
"""Factored out of set_revision_history.
1495
This performs the actual writing to disk.
1496
It is intended to be called by BzrBranch5.set_revision_history."""
1497
self._transport.put_bytes(
1498
'revision-history', '\n'.join(history),
1499
mode=self.bzrdir._get_file_mode())
1502
def set_revision_history(self, rev_history):
1503
"""See Branch.set_revision_history."""
1504
if 'evil' in debug.debug_flags:
1505
mutter_callsite(3, "set_revision_history scales with history.")
1506
check_not_reserved_id = _mod_revision.check_not_reserved_id
1507
for rev_id in rev_history:
1508
check_not_reserved_id(rev_id)
1509
self._write_revision_history(rev_history)
1510
self._clear_cached_state()
1511
self._cache_revision_history(rev_history)
1512
for hook in Branch.hooks['set_rh']:
1513
hook(self, rev_history)
1515
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1516
"""Run the post_change_branch_tip hooks."""
1517
hooks = Branch.hooks['post_change_branch_tip']
1520
new_revno, new_revid = self.last_revision_info()
1521
params = ChangeBranchTipParams(
1522
self, old_revno, new_revno, old_revid, new_revid)
1527
def set_last_revision_info(self, revno, revision_id):
1528
"""Set the last revision of this branch.
1530
The caller is responsible for checking that the revno is correct
1531
for this revision id.
1533
It may be possible to set the branch last revision to an id not
1534
present in the repository. However, branches can also be
1535
configured to check constraints on history, in which case this may not
1538
revision_id = _mod_revision.ensure_null(revision_id)
1539
old_revno, old_revid = self.last_revision_info()
1540
# this old format stores the full history, but this api doesn't
1541
# provide it, so we must generate, and might as well check it's
1543
history = self._lefthand_history(revision_id)
1544
if len(history) != revno:
1545
raise AssertionError('%d != %d' % (len(history), revno))
1546
self.set_revision_history(history)
1547
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1549
def _gen_revision_history(self):
1550
history = self._transport.get_bytes('revision-history').split('\n')
1551
if history[-1:] == ['']:
1552
# There shouldn't be a trailing newline, but just in case.
1556
def _lefthand_history(self, revision_id, last_rev=None,
1558
if 'evil' in debug.debug_flags:
1559
mutter_callsite(4, "_lefthand_history scales with history.")
1560
# stop_revision must be a descendant of last_revision
1561
graph = self.repository.get_graph()
1562
if last_rev is not None:
1563
if not graph.is_ancestor(last_rev, revision_id):
1564
# our previous tip is not merged into stop_revision
1565
raise errors.DivergedBranches(self, other_branch)
1566
# make a new revision history from the graph
1567
parents_map = graph.get_parent_map([revision_id])
1568
if revision_id not in parents_map:
1569
raise errors.NoSuchRevision(self, revision_id)
1570
current_rev_id = revision_id
1572
check_not_reserved_id = _mod_revision.check_not_reserved_id
1573
# Do not include ghosts or graph origin in revision_history
1574
while (current_rev_id in parents_map and
1575
len(parents_map[current_rev_id]) > 0):
1576
check_not_reserved_id(current_rev_id)
1577
new_history.append(current_rev_id)
1578
current_rev_id = parents_map[current_rev_id][0]
1579
parents_map = graph.get_parent_map([current_rev_id])
1580
new_history.reverse()
1584
def generate_revision_history(self, revision_id, last_rev=None,
1586
"""Create a new revision history that will finish with revision_id.
1588
:param revision_id: the new tip to use.
1589
:param last_rev: The previous last_revision. If not None, then this
1590
must be a ancestory of revision_id, or DivergedBranches is raised.
1591
:param other_branch: The other branch that DivergedBranches should
1592
raise with respect to.
1594
self.set_revision_history(self._lefthand_history(revision_id,
1595
last_rev, other_branch))
1597
def basis_tree(self):
1598
"""See Branch.basis_tree."""
1599
return self.repository.revision_tree(self.last_revision())
1602
def pull(self, source, overwrite=False, stop_revision=None,
1603
_hook_master=None, run_hooks=True, possible_transports=None,
1604
_override_hook_target=None):
1607
:param _hook_master: Private parameter - set the branch to
1608
be supplied as the master to pull hooks.
1609
:param run_hooks: Private parameter - if false, this branch
1610
is being called because it's the master of the primary branch,
1611
so it should not run its hooks.
1612
:param _override_hook_target: Private parameter - set the branch to be
1613
supplied as the target_branch to pull hooks.
1615
result = PullResult()
1616
result.source_branch = source
1617
if _override_hook_target is None:
1618
result.target_branch = self
1620
result.target_branch = _override_hook_target
1623
# We assume that during 'pull' the local repository is closer than
1625
graph = self.repository.get_graph(source.repository)
1626
result.old_revno, result.old_revid = self.last_revision_info()
1627
self.update_revisions(source, stop_revision, overwrite=overwrite,
1629
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
1630
result.new_revno, result.new_revid = self.last_revision_info()
1632
result.master_branch = _hook_master
1633
result.local_branch = result.target_branch
1635
result.master_branch = result.target_branch
1636
result.local_branch = None
1638
for hook in Branch.hooks['post_pull']:
1644
def _get_parent_location(self):
1645
_locs = ['parent', 'pull', 'x-pull']
1648
return self._transport.get_bytes(l).strip('\n')
1649
except errors.NoSuchFile:
1654
def push(self, target, overwrite=False, stop_revision=None,
1655
_override_hook_source_branch=None):
1658
This is the basic concrete implementation of push()
1660
:param _override_hook_source_branch: If specified, run
1661
the hooks passing this Branch as the source, rather than self.
1662
This is for use of RemoteBranch, where push is delegated to the
1663
underlying vfs-based Branch.
1665
# TODO: Public option to disable running hooks - should be trivial but
1669
result = self._push_with_bound_branches(target, overwrite,
1671
_override_hook_source_branch=_override_hook_source_branch)
1676
def _push_with_bound_branches(self, target, overwrite,
1678
_override_hook_source_branch=None):
1679
"""Push from self into target, and into target's master if any.
1681
This is on the base BzrBranch class even though it doesn't support
1682
bound branches because the *target* might be bound.
1685
if _override_hook_source_branch:
1686
result.source_branch = _override_hook_source_branch
1687
for hook in Branch.hooks['post_push']:
1690
bound_location = target.get_bound_location()
1691
if bound_location and target.base != bound_location:
1692
# there is a master branch.
1694
# XXX: Why the second check? Is it even supported for a branch to
1695
# be bound to itself? -- mbp 20070507
1696
master_branch = target.get_master_branch()
1697
master_branch.lock_write()
1699
# push into the master from this branch.
1700
self._basic_push(master_branch, overwrite, stop_revision)
1701
# and push into the target branch from this. Note that we push from
1702
# this branch again, because its considered the highest bandwidth
1704
result = self._basic_push(target, overwrite, stop_revision)
1705
result.master_branch = master_branch
1706
result.local_branch = target
1710
master_branch.unlock()
1713
result = self._basic_push(target, overwrite, stop_revision)
1714
# TODO: Why set master_branch and local_branch if there's no
1715
# binding? Maybe cleaner to just leave them unset? -- mbp
1717
result.master_branch = target
1718
result.local_branch = None
1722
def _basic_push(self, target, overwrite, stop_revision):
1723
"""Basic implementation of push without bound branches or hooks.
1725
Must be called with self read locked and target write locked.
1727
result = PushResult()
1728
result.source_branch = self
1729
result.target_branch = target
1730
result.old_revno, result.old_revid = target.last_revision_info()
1732
# We assume that during 'push' this repository is closer than
1734
graph = self.repository.get_graph(target.repository)
1735
target.update_revisions(self, stop_revision, overwrite=overwrite,
1737
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
1738
result.new_revno, result.new_revid = target.last_revision_info()
1741
def get_parent(self):
1742
"""See Branch.get_parent."""
1743
parent = self._get_parent_location()
1746
# This is an old-format absolute path to a local branch
1747
# turn it into a url
1748
if parent.startswith('/'):
1749
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1751
return urlutils.join(self.base[:-1], parent)
1752
except errors.InvalidURLJoin, e:
1753
raise errors.InaccessibleParent(parent, self.base)
1755
def set_push_location(self, location):
1756
"""See Branch.set_push_location."""
1757
self.get_config().set_user_option(
1758
'push_location', location,
1759
store=_mod_config.STORE_LOCATION_NORECURSE)
1762
def set_parent(self, url):
1763
"""See Branch.set_parent."""
1764
# TODO: Maybe delete old location files?
1765
# URLs should never be unicode, even on the local fs,
1766
# FIXUP this and get_parent in a future branch format bump:
1767
# read and rewrite the file. RBC 20060125
1769
if isinstance(url, unicode):
1771
url = url.encode('ascii')
1772
except UnicodeEncodeError:
1773
raise errors.InvalidURL(url,
1774
"Urls must be 7-bit ascii, "
1775
"use bzrlib.urlutils.escape")
1776
url = urlutils.relative_url(self.base, url)
1777
self._set_parent_location(url)
1779
def _set_parent_location(self, url):
1781
self._transport.delete('parent')
1783
self._transport.put_bytes('parent', url + '\n',
1784
mode=self.bzrdir._get_file_mode())
1787
class BzrBranch5(BzrBranch):
1788
"""A format 5 branch. This supports new features over plain branches.
1790
It has support for a master_branch which is the data for bound branches.
1798
super(BzrBranch5, self).__init__(_format=_format,
1799
_control_files=_control_files,
1801
_repository=_repository)
1804
def pull(self, source, overwrite=False, stop_revision=None,
1805
run_hooks=True, possible_transports=None,
1806
_override_hook_target=None):
1807
"""Pull from source into self, updating my master if any.
1809
:param run_hooks: Private parameter - if false, this branch
1810
is being called because it's the master of the primary branch,
1811
so it should not run its hooks.
1813
bound_location = self.get_bound_location()
1814
master_branch = None
1815
if bound_location and source.base != bound_location:
1816
# not pulling from master, so we need to update master.
1817
master_branch = self.get_master_branch(possible_transports)
1818
master_branch.lock_write()
1821
# pull from source into master.
1822
master_branch.pull(source, overwrite, stop_revision,
1824
return super(BzrBranch5, self).pull(source, overwrite,
1825
stop_revision, _hook_master=master_branch,
1826
run_hooks=run_hooks,
1827
_override_hook_target=_override_hook_target)
1830
master_branch.unlock()
1832
def get_bound_location(self):
1834
return self._transport.get_bytes('bound')[:-1]
1835
except errors.NoSuchFile:
1839
def get_master_branch(self, possible_transports=None):
1840
"""Return the branch we are bound to.
1842
:return: Either a Branch, or None
1844
This could memoise the branch, but if thats done
1845
it must be revalidated on each new lock.
1846
So for now we just don't memoise it.
1847
# RBC 20060304 review this decision.
1849
bound_loc = self.get_bound_location()
1853
return Branch.open(bound_loc,
1854
possible_transports=possible_transports)
1855
except (errors.NotBranchError, errors.ConnectionError), e:
1856
raise errors.BoundBranchConnectionFailure(
1860
def set_bound_location(self, location):
1861
"""Set the target where this branch is bound to.
1863
:param location: URL to the target branch
1866
self._transport.put_bytes('bound', location+'\n',
1867
mode=self.bzrdir._get_file_mode())
1870
self._transport.delete('bound')
1871
except errors.NoSuchFile:
1876
def bind(self, other):
1877
"""Bind this branch to the branch other.
1879
This does not push or pull data between the branches, though it does
1880
check for divergence to raise an error when the branches are not
1881
either the same, or one a prefix of the other. That behaviour may not
1882
be useful, so that check may be removed in future.
1884
:param other: The branch to bind to
1887
# TODO: jam 20051230 Consider checking if the target is bound
1888
# It is debatable whether you should be able to bind to
1889
# a branch which is itself bound.
1890
# Committing is obviously forbidden,
1891
# but binding itself may not be.
1892
# Since we *have* to check at commit time, we don't
1893
# *need* to check here
1895
# we want to raise diverged if:
1896
# last_rev is not in the other_last_rev history, AND
1897
# other_last_rev is not in our history, and do it without pulling
1899
self.set_bound_location(other.base)
1903
"""If bound, unbind"""
1904
return self.set_bound_location(None)
1907
def update(self, possible_transports=None):
1908
"""Synchronise this branch with the master branch if any.
1910
:return: None or the last_revision that was pivoted out during the
1913
master = self.get_master_branch(possible_transports)
1914
if master is not None:
1915
old_tip = _mod_revision.ensure_null(self.last_revision())
1916
self.pull(master, overwrite=True)
1917
if self.repository.get_graph().is_ancestor(old_tip,
1918
_mod_revision.ensure_null(self.last_revision())):
1924
class BzrBranch6(BzrBranch5):
1926
def __init__(self, *args, **kwargs):
1927
super(BzrBranch6, self).__init__(*args, **kwargs)
1928
self._partial_revision_history_cache = []
1930
def _clear_cached_state(self):
1931
super(BzrBranch6, self)._clear_cached_state()
1932
self._partial_revision_history_cache = []
1934
def _last_revision_info(self):
1935
revision_string = self._transport.get_bytes('last-revision')
1936
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
1937
revision_id = cache_utf8.get_cached_utf8(revision_id)
1939
return revno, revision_id
1941
def _write_last_revision_info(self, revno, revision_id):
1942
"""Simply write out the revision id, with no checks.
1944
Use set_last_revision_info to perform this safely.
1946
Does not update the revision_history cache.
1947
Intended to be called by set_last_revision_info and
1948
_write_revision_history.
1950
revision_id = _mod_revision.ensure_null(revision_id)
1951
out_string = '%d %s\n' % (revno, revision_id)
1952
self._transport.put_bytes('last-revision', out_string,
1953
mode=self.bzrdir._get_file_mode())
1956
def set_last_revision_info(self, revno, revision_id):
1957
revision_id = _mod_revision.ensure_null(revision_id)
1958
old_revno, old_revid = self.last_revision_info()
1959
if self._get_append_revisions_only():
1960
self._check_history_violation(revision_id)
1961
self._write_last_revision_info(revno, revision_id)
1962
self._clear_cached_state()
1963
self._last_revision_info_cache = revno, revision_id
1964
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1966
def _check_history_violation(self, revision_id):
1967
last_revision = _mod_revision.ensure_null(self.last_revision())
1968
if _mod_revision.is_null(last_revision):
1970
if last_revision not in self._lefthand_history(revision_id):
1971
raise errors.AppendRevisionsOnlyViolation(self.base)
1973
def _gen_revision_history(self):
1974
"""Generate the revision history from last revision
1976
last_revno, last_revision = self.last_revision_info()
1977
self._extend_partial_history(stop_index=last_revno-1)
1978
return list(reversed(self._partial_revision_history_cache))
1980
def _extend_partial_history(self, stop_index=None, stop_revision=None):
1981
"""Extend the partial history to include a given index
1983
If a stop_index is supplied, stop when that index has been reached.
1984
If a stop_revision is supplied, stop when that revision is
1985
encountered. Otherwise, stop when the beginning of history is
1988
:param stop_index: The index which should be present. When it is
1989
present, history extension will stop.
1990
:param revision_id: The revision id which should be present. When
1991
it is encountered, history extension will stop.
1993
repo = self.repository
1994
if len(self._partial_revision_history_cache) == 0:
1995
iterator = repo.iter_reverse_revision_history(self.last_revision())
1997
start_revision = self._partial_revision_history_cache[-1]
1998
iterator = repo.iter_reverse_revision_history(start_revision)
1999
#skip the last revision in the list
2000
next_revision = iterator.next()
2001
for revision_id in iterator:
2002
self._partial_revision_history_cache.append(revision_id)
2003
if (stop_index is not None and
2004
len(self._partial_revision_history_cache) > stop_index):
2006
if revision_id == stop_revision:
2009
def _write_revision_history(self, history):
2010
"""Factored out of set_revision_history.
2012
This performs the actual writing to disk, with format-specific checks.
2013
It is intended to be called by BzrBranch5.set_revision_history.
2015
if len(history) == 0:
2016
last_revision = 'null:'
2018
if history != self._lefthand_history(history[-1]):
2019
raise errors.NotLefthandHistory(history)
2020
last_revision = history[-1]
2021
if self._get_append_revisions_only():
2022
self._check_history_violation(last_revision)
2023
self._write_last_revision_info(len(history), last_revision)
2026
def _set_parent_location(self, url):
2027
"""Set the parent branch"""
2028
self._set_config_location('parent_location', url, make_relative=True)
2031
def _get_parent_location(self):
2032
"""Set the parent branch"""
2033
return self._get_config_location('parent_location')
2035
def set_push_location(self, location):
2036
"""See Branch.set_push_location."""
2037
self._set_config_location('push_location', location)
2039
def set_bound_location(self, location):
2040
"""See Branch.set_push_location."""
2042
config = self.get_config()
2043
if location is None:
2044
if config.get_user_option('bound') != 'True':
2047
config.set_user_option('bound', 'False', warn_masked=True)
2050
self._set_config_location('bound_location', location,
2052
config.set_user_option('bound', 'True', warn_masked=True)
2055
def _get_bound_location(self, bound):
2056
"""Return the bound location in the config file.
2058
Return None if the bound parameter does not match"""
2059
config = self.get_config()
2060
config_bound = (config.get_user_option('bound') == 'True')
2061
if config_bound != bound:
2063
return self._get_config_location('bound_location', config=config)
2065
def get_bound_location(self):
2066
"""See Branch.set_push_location."""
2067
return self._get_bound_location(True)
2069
def get_old_bound_location(self):
2070
"""See Branch.get_old_bound_location"""
2071
return self._get_bound_location(False)
2073
def set_append_revisions_only(self, enabled):
2078
self.get_config().set_user_option('append_revisions_only', value,
2081
def _get_append_revisions_only(self):
2082
value = self.get_config().get_user_option('append_revisions_only')
2083
return value == 'True'
2085
def _synchronize_history(self, destination, revision_id):
2086
"""Synchronize last revision and revision history between branches.
2088
This version is most efficient when the destination is also a
2089
BzrBranch6, but works for BzrBranch5, as long as the destination's
2090
repository contains all the lefthand ancestors of the intended
2091
last_revision. If not, set_last_revision_info will fail.
2093
:param destination: The branch to copy the history into
2094
:param revision_id: The revision-id to truncate history at. May
2095
be None to copy complete history.
2097
source_revno, source_revision_id = self.last_revision_info()
2098
if revision_id is None:
2099
revno, revision_id = source_revno, source_revision_id
2100
elif source_revision_id == revision_id:
2101
# we know the revno without needing to walk all of history
2102
revno = source_revno
2104
# To figure out the revno for a random revision, we need to build
2105
# the revision history, and count its length.
2106
# We don't care about the order, just how long it is.
2107
# Alternatively, we could start at the current location, and count
2108
# backwards. But there is no guarantee that we will find it since
2109
# it may be a merged revision.
2110
revno = len(list(self.repository.iter_reverse_revision_history(
2112
destination.set_last_revision_info(revno, revision_id)
2114
def _make_tags(self):
2115
return BasicTags(self)
2118
def generate_revision_history(self, revision_id, last_rev=None,
2120
"""See BzrBranch5.generate_revision_history"""
2121
history = self._lefthand_history(revision_id, last_rev, other_branch)
2122
revno = len(history)
2123
self.set_last_revision_info(revno, revision_id)
2126
def get_rev_id(self, revno, history=None):
2127
"""Find the revision id of the specified revno."""
2129
return _mod_revision.NULL_REVISION
2131
last_revno, last_revision_id = self.last_revision_info()
2132
if revno <= 0 or revno > last_revno:
2133
raise errors.NoSuchRevision(self, revno)
2135
if history is not None:
2136
return history[revno - 1]
2138
index = last_revno - revno
2139
if len(self._partial_revision_history_cache) <= index:
2140
self._extend_partial_history(stop_index=index)
2141
if len(self._partial_revision_history_cache) > index:
2142
return self._partial_revision_history_cache[index]
2144
raise errors.NoSuchRevision(self, revno)
2147
def revision_id_to_revno(self, revision_id):
2148
"""Given a revision id, return its revno"""
2149
if _mod_revision.is_null(revision_id):
2152
index = self._partial_revision_history_cache.index(revision_id)
2154
self._extend_partial_history(stop_revision=revision_id)
2155
index = len(self._partial_revision_history_cache) - 1
2156
if self._partial_revision_history_cache[index] != revision_id:
2157
raise errors.NoSuchRevision(self, revision_id)
2158
return self.revno() - index
2161
######################################################################
2162
# results of operations
2165
class _Result(object):
2167
def _show_tag_conficts(self, to_file):
2168
if not getattr(self, 'tag_conflicts', None):
2170
to_file.write('Conflicting tags:\n')
2171
for name, value1, value2 in self.tag_conflicts:
2172
to_file.write(' %s\n' % (name, ))
2175
class PullResult(_Result):
2176
"""Result of a Branch.pull operation.
2178
:ivar old_revno: Revision number before pull.
2179
:ivar new_revno: Revision number after pull.
2180
:ivar old_revid: Tip revision id before pull.
2181
:ivar new_revid: Tip revision id after pull.
2182
:ivar source_branch: Source (local) branch object.
2183
:ivar master_branch: Master branch of the target, or the target if no
2185
:ivar local_branch: target branch if there is a Master, else None
2186
:ivar target_branch: Target/destination branch object.
2187
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2191
# DEPRECATED: pull used to return the change in revno
2192
return self.new_revno - self.old_revno
2194
def report(self, to_file):
2196
if self.old_revid == self.new_revid:
2197
to_file.write('No revisions to pull.\n')
2199
to_file.write('Now on revision %d.\n' % self.new_revno)
2200
self._show_tag_conficts(to_file)
2203
class PushResult(_Result):
2204
"""Result of a Branch.push operation.
2206
:ivar old_revno: Revision number before push.
2207
:ivar new_revno: Revision number after push.
2208
:ivar old_revid: Tip revision id before push.
2209
:ivar new_revid: Tip revision id after push.
2210
:ivar source_branch: Source branch object.
2211
:ivar master_branch: Master branch of the target, or None.
2212
:ivar target_branch: Target/destination branch object.
2216
# DEPRECATED: push used to return the change in revno
2217
return self.new_revno - self.old_revno
2219
def report(self, to_file):
2220
"""Write a human-readable description of the result."""
2221
if self.old_revid == self.new_revid:
2222
to_file.write('No new revisions to push.\n')
2224
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2225
self._show_tag_conficts(to_file)
2228
class BranchCheckResult(object):
2229
"""Results of checking branch consistency.
2234
def __init__(self, branch):
2235
self.branch = branch
2237
def report_results(self, verbose):
2238
"""Report the check results via trace.note.
2240
:param verbose: Requests more detailed display of what was checked,
2243
note('checked branch %s format %s',
2245
self.branch._format)
2248
class Converter5to6(object):
2249
"""Perform an in-place upgrade of format 5 to format 6"""
2251
def convert(self, branch):
2252
# Data for 5 and 6 can peacefully coexist.
2253
format = BzrBranchFormat6()
2254
new_branch = format.open(branch.bzrdir, _found=True)
2256
# Copy source data into target
2257
new_branch._write_last_revision_info(*branch.last_revision_info())
2258
new_branch.set_parent(branch.get_parent())
2259
new_branch.set_bound_location(branch.get_bound_location())
2260
new_branch.set_push_location(branch.get_push_location())
2262
# New branch has no tags by default
2263
new_branch.tags._set_tag_dict({})
2265
# Copying done; now update target format
2266
new_branch._transport.put_bytes('format',
2267
format.get_format_string(),
2268
mode=new_branch.bzrdir._get_file_mode())
2270
# Clean up old files
2271
new_branch._transport.delete('revision-history')
2273
branch.set_parent(None)
2274
except errors.NoSuchFile:
2276
branch.set_bound_location(None)
added
removed
bzrlib/branch.py
