1
# Copyright (C) 2010, 2011 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
"""ControlDir is the basic control directory class.
19
The ControlDir class is the base for the control directory used
20
by all bzr and foreign formats. For the ".bzr" implementation,
21
see bzrlib.bzrdir.BzrDir.
25
from bzrlib.lazy_import import lazy_import
26
lazy_import(globals(), """
33
revision as _mod_revision,
34
transport as _mod_transport,
37
from bzrlib.push import (
40
from bzrlib.trace import (
43
from bzrlib.transport import (
49
from bzrlib import registry
52
class ControlComponent(object):
53
"""Abstract base class for control directory components.
55
This provides interfaces that are common across controldirs,
56
repositories, branches, and workingtree control directories.
58
They all expose two urls and transports: the *user* URL is the
59
one that stops above the control directory (eg .bzr) and that
60
should normally be used in messages, and the *control* URL is
61
under that in eg .bzr/checkout and is used to read the control
64
This can be used as a mixin and is intended to fit with
69
def control_transport(self):
70
raise NotImplementedError
73
def control_url(self):
74
return self.control_transport.base
77
def user_transport(self):
78
raise NotImplementedError
82
return self.user_transport.base
85
class ControlDir(ControlComponent):
86
"""A control directory.
88
While this represents a generic control directory, there are a few
89
features that are present in this interface that are currently only
90
supported by one of its implementations, BzrDir.
92
These features (bound branches, stacked branches) are currently only
93
supported by Bazaar, but could be supported by other version control
94
systems as well. Implementations are required to raise the appropriate
95
exceptions when an operation is requested that is not supported.
97
This also makes life easier for API users who can rely on the
98
implementation always allowing a particular feature to be requested but
99
raising an exception when it is not supported, rather than requiring the
100
API users to check for magic attributes to see what features are supported.
103
def can_convert_format(self):
104
"""Return true if this controldir is one whose format we can convert
108
def list_branches(self):
109
"""Return a sequence of all branches local to this control directory.
113
return [self.open_branch()]
114
except (errors.NotBranchError, errors.NoRepositoryPresent):
117
def is_control_filename(self, filename):
118
"""True if filename is the name of a path which is reserved for
121
:param filename: A filename within the root transport of this
124
This is true IF and ONLY IF the filename is part of the namespace reserved
125
for bzr control dirs. Currently this is the '.bzr' directory in the root
126
of the root_transport. it is expected that plugins will need to extend
127
this in the future - for instance to make bzr talk with svn working
130
raise NotImplementedError(self.is_control_filename)
132
def needs_format_conversion(self, format=None):
133
"""Return true if this controldir needs convert_format run on it.
135
For instance, if the repository format is out of date but the
136
branch and working tree are not, this should return True.
138
:param format: Optional parameter indicating a specific desired
139
format we plan to arrive at.
141
raise NotImplementedError(self.needs_format_conversion)
143
def create_repository(self, shared=False):
144
"""Create a new repository in this control directory.
146
:param shared: If a shared repository should be created
147
:return: The newly created repository
149
raise NotImplementedError(self.create_repository)
151
def destroy_repository(self):
152
"""Destroy the repository in this ControlDir."""
153
raise NotImplementedError(self.destroy_repository)
155
def create_branch(self, name=None, repository=None):
156
"""Create a branch in this ControlDir.
158
:param name: Name of the colocated branch to create, None for
161
The controldirs format will control what branch format is created.
162
For more control see BranchFormatXX.create(a_controldir).
164
raise NotImplementedError(self.create_branch)
166
def destroy_branch(self, name=None):
167
"""Destroy a branch in this ControlDir.
169
:param name: Name of the branch to destroy, None for the default
172
raise NotImplementedError(self.destroy_branch)
174
def create_workingtree(self, revision_id=None, from_branch=None,
175
accelerator_tree=None, hardlink=False):
176
"""Create a working tree at this ControlDir.
178
:param revision_id: create it as of this revision id.
179
:param from_branch: override controldir branch
180
(for lightweight checkouts)
181
:param accelerator_tree: A tree which can be used for retrieving file
182
contents more quickly than the revision tree, i.e. a workingtree.
183
The revision tree will be used for cases where accelerator_tree's
184
content is different.
186
raise NotImplementedError(self.create_workingtree)
188
def destroy_workingtree(self):
189
"""Destroy the working tree at this ControlDir.
191
Formats that do not support this may raise UnsupportedOperation.
193
raise NotImplementedError(self.destroy_workingtree)
195
def destroy_workingtree_metadata(self):
196
"""Destroy the control files for the working tree at this ControlDir.
198
The contents of working tree files are not affected.
199
Formats that do not support this may raise UnsupportedOperation.
201
raise NotImplementedError(self.destroy_workingtree_metadata)
203
def get_branch_reference(self, name=None):
204
"""Return the referenced URL for the branch in this controldir.
206
:param name: Optional colocated branch name
207
:raises NotBranchError: If there is no Branch.
208
:raises NoColocatedBranchSupport: If a branch name was specified
209
but colocated branches are not supported.
210
:return: The URL the branch in this controldir references if it is a
211
reference branch, or None for regular branches.
214
raise errors.NoColocatedBranchSupport(self)
217
def open_branch(self, name=None, unsupported=False,
218
ignore_fallbacks=False):
219
"""Open the branch object at this ControlDir if one is present.
221
If unsupported is True, then no longer supported branch formats can
224
TODO: static convenience version of this?
226
raise NotImplementedError(self.open_branch)
228
def open_repository(self, _unsupported=False):
229
"""Open the repository object at this ControlDir if one is present.
231
This will not follow the Branch object pointer - it's strictly a direct
232
open facility. Most client code should use open_branch().repository to
235
:param _unsupported: a private parameter, not part of the api.
236
TODO: static convenience version of this?
238
raise NotImplementedError(self.open_repository)
240
def find_repository(self):
241
"""Find the repository that should be used.
243
This does not require a branch as we use it to find the repo for
244
new branches as well as to hook existing branches up to their
247
raise NotImplementedError(self.find_repository)
249
def open_workingtree(self, _unsupported=False,
250
recommend_upgrade=True, from_branch=None):
251
"""Open the workingtree object at this ControlDir if one is present.
253
:param recommend_upgrade: Optional keyword parameter, when True (the
254
default), emit through the ui module a recommendation that the user
255
upgrade the working tree when the workingtree being opened is old
256
(but still fully supported).
257
:param from_branch: override controldir branch (for lightweight
260
raise NotImplementedError(self.open_workingtree)
262
def has_branch(self, name=None):
263
"""Tell if this controldir contains a branch.
265
Note: if you're going to open the branch, you should just go ahead
266
and try, and not ask permission first. (This method just opens the
267
branch and discards it, and that's somewhat expensive.)
270
self.open_branch(name)
272
except errors.NotBranchError:
275
def has_workingtree(self):
276
"""Tell if this controldir contains a working tree.
278
This will still raise an exception if the controldir has a workingtree
279
that is remote & inaccessible.
281
Note: if you're going to open the working tree, you should just go ahead
282
and try, and not ask permission first. (This method just opens the
283
workingtree and discards it, and that's somewhat expensive.)
286
self.open_workingtree(recommend_upgrade=False)
288
except errors.NoWorkingTree:
291
def cloning_metadir(self, require_stacking=False):
292
"""Produce a metadir suitable for cloning or sprouting with.
294
These operations may produce workingtrees (yes, even though they're
295
"cloning" something that doesn't have a tree), so a viable workingtree
296
format must be selected.
298
:require_stacking: If True, non-stackable formats will be upgraded
299
to similar stackable formats.
300
:returns: a ControlDirFormat with all component formats either set
301
appropriately or set to None if that component should not be
304
raise NotImplementedError(self.cloning_metadir)
306
def checkout_metadir(self):
307
"""Produce a metadir suitable for checkouts of this controldir."""
308
return self.cloning_metadir()
310
def sprout(self, url, revision_id=None, force_new_repo=False,
311
recurse='down', possible_transports=None,
312
accelerator_tree=None, hardlink=False, stacked=False,
313
source_branch=None, create_tree_if_local=True):
314
"""Create a copy of this controldir prepared for use as a new line of
317
If url's last component does not exist, it will be created.
319
Attributes related to the identity of the source branch like
320
branch nickname will be cleaned, a working tree is created
321
whether one existed before or not; and a local branch is always
324
if revision_id is not None, then the clone operation may tune
325
itself to download less data.
326
:param accelerator_tree: A tree which can be used for retrieving file
327
contents more quickly than the revision tree, i.e. a workingtree.
328
The revision tree will be used for cases where accelerator_tree's
329
content is different.
330
:param hardlink: If true, hard-link files from accelerator_tree,
332
:param stacked: If true, create a stacked branch referring to the
333
location of this control directory.
334
:param create_tree_if_local: If true, a working-tree will be created
335
when working locally.
337
operation = cleanup.OperationWithCleanups(self._sprout)
338
return operation.run(url, revision_id=revision_id,
339
force_new_repo=force_new_repo, recurse=recurse,
340
possible_transports=possible_transports,
341
accelerator_tree=accelerator_tree, hardlink=hardlink,
342
stacked=stacked, source_branch=source_branch,
343
create_tree_if_local=create_tree_if_local)
345
def _sprout(self, op, url, revision_id=None, force_new_repo=False,
346
recurse='down', possible_transports=None,
347
accelerator_tree=None, hardlink=False, stacked=False,
348
source_branch=None, create_tree_if_local=True):
349
add_cleanup = op.add_cleanup
350
fetch_spec_factory = fetch.FetchSpecFactory()
351
if revision_id is not None:
352
fetch_spec_factory.add_revision_ids([revision_id])
353
fetch_spec_factory.source_branch_stop_revision_id = revision_id
354
target_transport = _mod_transport.get_transport(url,
356
target_transport.ensure_base()
357
cloning_format = self.cloning_metadir(stacked)
358
# Create/update the result branch
359
result = cloning_format.initialize_on_transport(target_transport)
360
source_branch, source_repository = self._find_source_repo(
361
add_cleanup, source_branch)
362
fetch_spec_factory.source_branch = source_branch
363
# if a stacked branch wasn't requested, we don't create one
364
# even if the origin was stacked
365
if stacked and source_branch is not None:
366
stacked_branch_url = self.root_transport.base
368
stacked_branch_url = None
369
repository_policy = result.determine_repository_policy(
370
force_new_repo, stacked_branch_url, require_stacking=stacked)
371
result_repo, is_new_repo = repository_policy.acquire_repository()
372
add_cleanup(result_repo.lock_write().unlock)
373
fetch_spec_factory.source_repo = source_repository
374
fetch_spec_factory.target_repo = result_repo
375
if stacked or (len(result_repo._fallback_repositories) != 0):
376
target_repo_kind = fetch.TargetRepoKinds.STACKED
378
target_repo_kind = fetch.TargetRepoKinds.EMPTY
380
target_repo_kind = fetch.TargetRepoKinds.PREEXISTING
381
fetch_spec_factory.target_repo_kind = target_repo_kind
382
if source_repository is not None:
383
fetch_spec = fetch_spec_factory.make_fetch_spec()
384
result_repo.fetch(source_repository, fetch_spec=fetch_spec)
386
if source_branch is None:
387
# this is for sprouting a controldir without a branch; is that
389
# Not especially, but it's part of the contract.
390
result_branch = result.create_branch()
392
result_branch = source_branch.sprout(result,
393
revision_id=revision_id, repository_policy=repository_policy,
394
repository=result_repo)
395
mutter("created new branch %r" % (result_branch,))
397
# Create/update the result working tree
398
if (create_tree_if_local and
399
isinstance(target_transport, local.LocalTransport) and
400
(result_repo is None or result_repo.make_working_trees())):
401
wt = result.create_workingtree(accelerator_tree=accelerator_tree,
402
hardlink=hardlink, from_branch=result_branch)
405
if wt.path2id('') is None:
407
wt.set_root_id(self.open_workingtree.get_root_id())
408
except errors.NoWorkingTree:
414
if recurse == 'down':
417
basis = wt.basis_tree()
418
elif result_branch is not None:
419
basis = result_branch.basis_tree()
420
elif source_branch is not None:
421
basis = source_branch.basis_tree()
422
if basis is not None:
423
add_cleanup(basis.lock_read().unlock)
424
subtrees = basis.iter_references()
427
for path, file_id in subtrees:
428
target = urlutils.join(url, urlutils.escape(path))
429
sublocation = source_branch.reference_parent(file_id, path)
430
sublocation.bzrdir.sprout(target,
431
basis.get_reference_revision(file_id, path),
432
force_new_repo=force_new_repo, recurse=recurse,
436
def _find_source_repo(self, add_cleanup, source_branch):
437
"""Find the source branch and repo for a sprout operation.
439
This is helper intended for use by _sprout.
441
:returns: (source_branch, source_repository). Either or both may be
442
None. If not None, they will be read-locked (and their unlock(s)
443
scheduled via the add_cleanup param).
445
if source_branch is not None:
446
add_cleanup(source_branch.lock_read().unlock)
447
return source_branch, source_branch.repository
449
source_branch = self.open_branch()
450
source_repository = source_branch.repository
451
except errors.NotBranchError:
454
source_repository = self.open_repository()
455
except errors.NoRepositoryPresent:
456
source_repository = None
458
add_cleanup(source_repository.lock_read().unlock)
460
add_cleanup(source_branch.lock_read().unlock)
461
return source_branch, source_repository
463
def push_branch(self, source, revision_id=None, overwrite=False,
464
remember=False, create_prefix=False):
465
"""Push the source branch into this ControlDir."""
467
# If we can open a branch, use its direct repository, otherwise see
468
# if there is a repository without a branch.
470
br_to = self.open_branch()
471
except errors.NotBranchError:
472
# Didn't find a branch, can we find a repository?
473
repository_to = self.find_repository()
475
# Found a branch, so we must have found a repository
476
repository_to = br_to.repository
478
push_result = PushResult()
479
push_result.source_branch = source
481
# We have a repository but no branch, copy the revisions, and then
483
if revision_id is None:
484
# No revision supplied by the user, default to the branch
486
revision_id = source.last_revision()
487
repository_to.fetch(source.repository, revision_id=revision_id)
488
br_to = source.clone(self, revision_id=revision_id)
489
if source.get_push_location() is None or remember:
490
source.set_push_location(br_to.base)
491
push_result.stacked_on = None
492
push_result.branch_push_result = None
493
push_result.old_revno = None
494
push_result.old_revid = _mod_revision.NULL_REVISION
495
push_result.target_branch = br_to
496
push_result.master_branch = None
497
push_result.workingtree_updated = False
499
# We have successfully opened the branch, remember if necessary:
500
if source.get_push_location() is None or remember:
501
source.set_push_location(br_to.base)
503
tree_to = self.open_workingtree()
504
except errors.NotLocalUrl:
505
push_result.branch_push_result = source.push(br_to,
506
overwrite, stop_revision=revision_id)
507
push_result.workingtree_updated = False
508
except errors.NoWorkingTree:
509
push_result.branch_push_result = source.push(br_to,
510
overwrite, stop_revision=revision_id)
511
push_result.workingtree_updated = None # Not applicable
515
push_result.branch_push_result = source.push(
516
tree_to.branch, overwrite, stop_revision=revision_id)
520
push_result.workingtree_updated = True
521
push_result.old_revno = push_result.branch_push_result.old_revno
522
push_result.old_revid = push_result.branch_push_result.old_revid
523
push_result.target_branch = \
524
push_result.branch_push_result.target_branch
527
def _get_tree_branch(self, name=None):
528
"""Return the branch and tree, if any, for this bzrdir.
530
:param name: Name of colocated branch to open.
532
Return None for tree if not present or inaccessible.
533
Raise NotBranchError if no branch is present.
534
:return: (tree, branch)
537
tree = self.open_workingtree()
538
except (errors.NoWorkingTree, errors.NotLocalUrl):
540
branch = self.open_branch(name=name)
543
branch = self.open_branch(name=name)
548
def get_config(self):
549
"""Get configuration for this ControlDir."""
550
raise NotImplementedError(self.get_config)
552
def check_conversion_target(self, target_format):
553
"""Check that a bzrdir as a whole can be converted to a new format."""
554
raise NotImplementedError(self.check_conversion_target)
556
def clone(self, url, revision_id=None, force_new_repo=False,
557
preserve_stacking=False):
558
"""Clone this bzrdir and its contents to url verbatim.
560
:param url: The url create the clone at. If url's last component does
561
not exist, it will be created.
562
:param revision_id: The tip revision-id to use for any branch or
563
working tree. If not None, then the clone operation may tune
564
itself to download less data.
565
:param force_new_repo: Do not use a shared repository for the target
566
even if one is available.
567
:param preserve_stacking: When cloning a stacked branch, stack the
568
new branch on top of the other branch's stacked-on branch.
570
return self.clone_on_transport(_mod_transport.get_transport(url),
571
revision_id=revision_id,
572
force_new_repo=force_new_repo,
573
preserve_stacking=preserve_stacking)
575
def clone_on_transport(self, transport, revision_id=None,
576
force_new_repo=False, preserve_stacking=False, stacked_on=None,
577
create_prefix=False, use_existing_dir=True, no_tree=False):
578
"""Clone this bzrdir and its contents to transport verbatim.
580
:param transport: The transport for the location to produce the clone
581
at. If the target directory does not exist, it will be created.
582
:param revision_id: The tip revision-id to use for any branch or
583
working tree. If not None, then the clone operation may tune
584
itself to download less data.
585
:param force_new_repo: Do not use a shared repository for the target,
586
even if one is available.
587
:param preserve_stacking: When cloning a stacked branch, stack the
588
new branch on top of the other branch's stacked-on branch.
589
:param create_prefix: Create any missing directories leading up to
591
:param use_existing_dir: Use an existing directory if one exists.
592
:param no_tree: If set to true prevents creation of a working tree.
594
raise NotImplementedError(self.clone_on_transport)
597
class ControlComponentFormat(object):
598
"""A component that can live inside of a .bzr meta directory."""
600
def get_format_string(self):
601
"""Return the format of this format, if usable in meta directories."""
602
raise NotImplementedError(self.get_format_string)
604
def get_format_description(self):
605
"""Return the short description for this format."""
606
raise NotImplementedError(self.get_format_description)
609
class ControlComponentFormatRegistry(registry.FormatRegistry):
610
"""A registry for control components (branch, workingtree, repository)."""
612
def __init__(self, other_registry=None):
613
super(ControlComponentFormatRegistry, self).__init__(other_registry)
614
self._extra_formats = []
616
def register(self, format):
617
"""Register a new format."""
618
super(ControlComponentFormatRegistry, self).register(
619
format.get_format_string(), format)
621
def remove(self, format):
622
"""Remove a registered format."""
623
super(ControlComponentFormatRegistry, self).remove(
624
format.get_format_string())
626
def register_extra(self, format):
627
"""Register a format that can not be used in a metadir.
629
This is mainly useful to allow custom repository formats, such as older
630
Bazaar formats and foreign formats, to be tested.
632
self._extra_formats.append(registry._ObjectGetter(format))
634
def remove_extra(self, format):
635
"""Remove an extra format.
637
self._extra_formats.remove(registry._ObjectGetter(format))
639
def register_extra_lazy(self, module_name, member_name):
640
"""Register a format lazily.
642
self._extra_formats.append(
643
registry._LazyObjectGetter(module_name, member_name))
645
def _get_extra(self):
646
"""Return all "extra" formats, not usable in meta directories."""
648
for getter in self._extra_formats:
656
"""Return all formats, even those not usable in metadirs.
659
for name in self.keys():
664
return result + self._get_extra()
666
def _get_all_modules(self):
667
"""Return a set of the modules providing objects."""
669
for name in self.keys():
670
modules.add(self._get_module(name))
671
for getter in self._extra_formats:
672
modules.add(getter.get_module())
676
class Converter(object):
677
"""Converts a disk format object from one format to another."""
679
def convert(self, to_convert, pb):
680
"""Perform the conversion of to_convert, giving feedback via pb.
682
:param to_convert: The disk object to convert.
683
:param pb: a progress bar to use for progress information.
686
def step(self, message):
687
"""Update the pb by a step."""
689
self.pb.update(message, self.count, self.total)
692
class ControlDirFormat(object):
693
"""An encapsulation of the initialization and open routines for a format.
695
Formats provide three things:
696
* An initialization routine,
700
Formats are placed in a dict by their format string for reference
701
during controldir opening. These should be subclasses of ControlDirFormat
704
Once a format is deprecated, just deprecate the initialize and open
705
methods on the format class. Do not deprecate the object, as the
706
object will be created every system load.
708
:cvar colocated_branches: Whether this formats supports colocated branches.
709
:cvar supports_workingtrees: This control directory can co-exist with a
713
_default_format = None
714
"""The default format used for new control directories."""
717
"""The registered server format probers, e.g. RemoteBzrProber.
719
This is a list of Prober-derived classes.
723
"""The registered format probers, e.g. BzrProber.
725
This is a list of Prober-derived classes.
728
colocated_branches = False
729
"""Whether co-located branches are supported for this control dir format.
732
supports_workingtrees = True
733
"""Whether working trees can exist in control directories of this format.
736
fixed_components = False
737
"""Whether components can not change format independent of the control dir.
740
def get_format_description(self):
741
"""Return the short description for this format."""
742
raise NotImplementedError(self.get_format_description)
744
def get_converter(self, format=None):
745
"""Return the converter to use to convert controldirs needing converts.
747
This returns a bzrlib.controldir.Converter object.
749
This should return the best upgrader to step this format towards the
750
current default format. In the case of plugins we can/should provide
751
some means for them to extend the range of returnable converters.
753
:param format: Optional format to override the default format of the
756
raise NotImplementedError(self.get_converter)
758
def is_supported(self):
759
"""Is this format supported?
761
Supported formats must be initializable and openable.
762
Unsupported formats may not support initialization or committing or
763
some other features depending on the reason for not being supported.
767
def same_model(self, target_format):
768
return (self.repository_format.rich_root_data ==
769
target_format.rich_root_data)
772
def register_format(klass, format):
773
"""Register a format that does not use '.bzr' for its control dir.
776
raise errors.BzrError("ControlDirFormat.register_format() has been "
777
"removed in Bazaar 2.4. Please upgrade your plugins.")
780
def register_prober(klass, prober):
781
"""Register a prober that can look for a control dir.
784
klass._probers.append(prober)
787
def unregister_prober(klass, prober):
788
"""Unregister a prober.
791
klass._probers.remove(prober)
794
def register_server_prober(klass, prober):
795
"""Register a control format prober for client-server environments.
797
These probers will be used before ones registered with
798
register_prober. This gives implementations that decide to the
799
chance to grab it before anything looks at the contents of the format
802
klass._server_probers.append(prober)
806
return self.get_format_description().rstrip()
809
def known_formats(klass):
810
"""Return all the known formats.
813
for prober_kls in klass._probers + klass._server_probers:
814
result.update(prober_kls.known_formats())
818
def find_format(klass, transport, _server_formats=True):
819
"""Return the format present at transport."""
821
_probers = klass._server_probers + klass._probers
823
_probers = klass._probers
824
for prober_kls in _probers:
825
prober = prober_kls()
827
return prober.probe_transport(transport)
828
except errors.NotBranchError:
829
# this format does not find a control dir here.
831
raise errors.NotBranchError(path=transport.base)
833
def initialize(self, url, possible_transports=None):
834
"""Create a control dir at this url and return an opened copy.
836
While not deprecated, this method is very specific and its use will
837
lead to many round trips to setup a working environment. See
838
initialize_on_transport_ex for a [nearly] all-in-one method.
840
Subclasses should typically override initialize_on_transport
841
instead of this method.
843
return self.initialize_on_transport(
844
_mod_transport.get_transport(url, possible_transports))
846
def initialize_on_transport(self, transport):
847
"""Initialize a new controldir in the base directory of a Transport."""
848
raise NotImplementedError(self.initialize_on_transport)
850
def initialize_on_transport_ex(self, transport, use_existing_dir=False,
851
create_prefix=False, force_new_repo=False, stacked_on=None,
852
stack_on_pwd=None, repo_format_name=None, make_working_trees=None,
853
shared_repo=False, vfs_only=False):
854
"""Create this format on transport.
856
The directory to initialize will be created.
858
:param force_new_repo: Do not use a shared repository for the target,
859
even if one is available.
860
:param create_prefix: Create any missing directories leading up to
862
:param use_existing_dir: Use an existing directory if one exists.
863
:param stacked_on: A url to stack any created branch on, None to follow
864
any target stacking policy.
865
:param stack_on_pwd: If stack_on is relative, the location it is
867
:param repo_format_name: If non-None, a repository will be
868
made-or-found. Should none be found, or if force_new_repo is True
869
the repo_format_name is used to select the format of repository to
871
:param make_working_trees: Control the setting of make_working_trees
872
for a new shared repository when one is made. None to use whatever
873
default the format has.
874
:param shared_repo: Control whether made repositories are shared or
876
:param vfs_only: If True do not attempt to use a smart server
877
:return: repo, controldir, require_stacking, repository_policy. repo is
878
None if none was created or found, controldir is always valid.
879
require_stacking is the result of examining the stacked_on
880
parameter and any stacking policy found for the target.
882
raise NotImplementedError(self.initialize_on_transport_ex)
884
def network_name(self):
885
"""A simple byte string uniquely identifying this format for RPC calls.
887
Bzr control formats use this disk format string to identify the format
888
over the wire. Its possible that other control formats have more
889
complex detection requirements, so we permit them to use any unique and
890
immutable string they desire.
892
raise NotImplementedError(self.network_name)
894
def open(self, transport, _found=False):
895
"""Return an instance of this format for the dir transport points at.
897
raise NotImplementedError(self.open)
900
def _set_default_format(klass, format):
901
"""Set default format (for testing behavior of defaults only)"""
902
klass._default_format = format
905
def get_default_format(klass):
906
"""Return the current default format."""
907
return klass._default_format
910
class Prober(object):
911
"""Abstract class that can be used to detect a particular kind of
914
At the moment this just contains a single method to probe a particular
915
transport, but it may be extended in the future to e.g. avoid
916
multiple levels of probing for Subversion repositories.
918
See BzrProber and RemoteBzrProber in bzrlib.bzrdir for the
919
probers that detect .bzr/ directories and Bazaar smart servers,
922
Probers should be registered using the register_server_prober or
923
register_prober methods on ControlDirFormat.
926
def probe_transport(self, transport):
927
"""Return the controldir style format present in a directory.
929
:raise UnknownFormatError: If a control dir was found but is
930
in an unknown format.
931
:raise NotBranchError: If no control directory was found.
932
:return: A ControlDirFormat instance.
934
raise NotImplementedError(self.probe_transport)
937
def known_formats(cls):
938
"""Return the control dir formats known by this prober.
940
Multiple probers can return the same formats, so this should
943
:return: A set of known formats.
945
raise NotImplementedError(cls.known_formats)
948
class ControlDirFormatInfo(object):
950
def __init__(self, native, deprecated, hidden, experimental):
951
self.deprecated = deprecated
954
self.experimental = experimental
957
class ControlDirFormatRegistry(registry.Registry):
958
"""Registry of user-selectable ControlDir subformats.
960
Differs from ControlDirFormat._formats in that it provides sub-formats,
961
e.g. BzrDirMeta1 with weave repository. Also, it's more user-oriented.
965
"""Create a ControlDirFormatRegistry."""
966
self._aliases = set()
967
self._registration_order = list()
968
super(ControlDirFormatRegistry, self).__init__()
971
"""Return a set of the format names which are aliases."""
972
return frozenset(self._aliases)
974
def register(self, key, factory, help, native=True, deprecated=False,
975
hidden=False, experimental=False, alias=False):
976
"""Register a ControlDirFormat factory.
978
The factory must be a callable that takes one parameter: the key.
979
It must produce an instance of the ControlDirFormat when called.
981
This function mainly exists to prevent the info object from being
984
registry.Registry.register(self, key, factory, help,
985
ControlDirFormatInfo(native, deprecated, hidden, experimental))
987
self._aliases.add(key)
988
self._registration_order.append(key)
990
def register_lazy(self, key, module_name, member_name, help, native=True,
991
deprecated=False, hidden=False, experimental=False, alias=False):
992
registry.Registry.register_lazy(self, key, module_name, member_name,
993
help, ControlDirFormatInfo(native, deprecated, hidden, experimental))
995
self._aliases.add(key)
996
self._registration_order.append(key)
998
def set_default(self, key):
999
"""Set the 'default' key to be a clone of the supplied key.
1001
This method must be called once and only once.
1003
registry.Registry.register(self, 'default', self.get(key),
1004
self.get_help(key), info=self.get_info(key))
1005
self._aliases.add('default')
1007
def set_default_repository(self, key):
1008
"""Set the FormatRegistry default and Repository default.
1010
This is a transitional method while Repository.set_default_format
1013
if 'default' in self:
1014
self.remove('default')
1015
self.set_default(key)
1016
format = self.get('default')()
1018
def make_bzrdir(self, key):
1019
return self.get(key)()
1021
def help_topic(self, topic):
1023
default_realkey = None
1024
default_help = self.get_help('default')
1026
for key in self._registration_order:
1027
if key == 'default':
1029
help = self.get_help(key)
1030
if help == default_help:
1031
default_realkey = key
1033
help_pairs.append((key, help))
1035
def wrapped(key, help, info):
1037
help = '(native) ' + help
1038
return ':%s:\n%s\n\n' % (key,
1039
textwrap.fill(help, initial_indent=' ',
1040
subsequent_indent=' ',
1041
break_long_words=False))
1042
if default_realkey is not None:
1043
output += wrapped(default_realkey, '(default) %s' % default_help,
1044
self.get_info('default'))
1045
deprecated_pairs = []
1046
experimental_pairs = []
1047
for key, help in help_pairs:
1048
info = self.get_info(key)
1051
elif info.deprecated:
1052
deprecated_pairs.append((key, help))
1053
elif info.experimental:
1054
experimental_pairs.append((key, help))
1056
output += wrapped(key, help, info)
1057
output += "\nSee :doc:`formats-help` for more about storage formats."
1059
if len(experimental_pairs) > 0:
1060
other_output += "Experimental formats are shown below.\n\n"
1061
for key, help in experimental_pairs:
1062
info = self.get_info(key)
1063
other_output += wrapped(key, help, info)
1066
"No experimental formats are available.\n\n"
1067
if len(deprecated_pairs) > 0:
1068
other_output += "\nDeprecated formats are shown below.\n\n"
1069
for key, help in deprecated_pairs:
1070
info = self.get_info(key)
1071
other_output += wrapped(key, help, info)
1074
"\nNo deprecated formats are available.\n\n"
1076
"\nSee :doc:`formats-help` for more about storage formats."
1078
if topic == 'other-formats':
1084
# Please register new formats after old formats so that formats
1085
# appear in chronological order and format descriptions can build
1087
format_registry = ControlDirFormatRegistry()
1089
network_format_registry = registry.FormatRegistry()
1090
"""Registry of formats indexed by their network name.
1092
The network name for a ControlDirFormat is an identifier that can be used when
1093
referring to formats with smart server operations. See
1094
ControlDirFormat.network_name() for more detail.
added
removed
bzrlib/controldir.py
