21
from warnings import warn
20
22
from cStringIO import StringIO
26
from bzrlib.inventory import InventoryEntry
27
import bzrlib.inventory as inventory
23
28
from bzrlib.trace import mutter, note
24
from bzrlib.osutils import isdir, quotefn, compact_date, rand_bytes, \
26
sha_file, appendpath, file_kind
29
from bzrlib.osutils import (isdir, quotefn, compact_date, rand_bytes,
30
rename, splitpath, sha_file, appendpath,
32
import bzrlib.errors as errors
28
33
from bzrlib.errors import (BzrError, InvalidRevisionNumber, InvalidRevisionId,
34
NoSuchRevision, HistoryMissing, NotBranchError,
35
DivergedBranches, LockError, UnlistableStore,
36
UnlistableBranch, NoSuchFile, NotVersionedError)
30
37
from bzrlib.textui import show_status
31
from bzrlib.revision import Revision
38
from bzrlib.revision import (Revision, is_ancestor, get_intervening_revisions,
32
41
from bzrlib.delta import compare_trees
33
42
from bzrlib.tree import EmptyTree, RevisionTree
34
43
from bzrlib.inventory import Inventory
35
from bzrlib.weavestore import WeaveStore
36
from bzrlib.store import ImmutableStore
44
from bzrlib.store import copy_all
45
from bzrlib.store.compressed_text import CompressedTextStore
46
from bzrlib.store.text import TextStore
47
from bzrlib.store.weave import WeaveStore
48
from bzrlib.testament import Testament
49
import bzrlib.transactions as transactions
50
from bzrlib.transport import Transport, get_transport
41
INVENTORY_FILEID = '__inventory'
42
ANCESTRY_FILEID = '__ancestry'
45
55
BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
46
56
BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
57
BZR_BRANCH_FORMAT_6 = "Bazaar-NG branch, format 6\n"
47
58
## TODO: Maybe include checks for common corruption of newlines, etc?
52
63
# cache in memory to make this faster. In general anything can be
53
64
# cached in memory between lock and unlock operations.
55
# TODO: please move the revision-string syntax stuff out of the branch
56
# object; it's clutter
59
def find_branch(f, **args):
60
if f and (f.startswith('http://') or f.startswith('https://')):
62
return remotebranch.RemoteBranch(f, **args)
64
return Branch(f, **args)
67
def find_cached_branch(f, cache_root, **args):
68
from remotebranch import RemoteBranch
69
br = find_branch(f, **args)
70
def cacheify(br, store_name):
71
from meta_store import CachedStore
72
cache_path = os.path.join(cache_root, store_name)
74
new_store = CachedStore(getattr(br, store_name), cache_path)
75
setattr(br, store_name, new_store)
77
if isinstance(br, RemoteBranch):
78
cacheify(br, 'inventory_store')
79
cacheify(br, 'text_store')
80
cacheify(br, 'revision_store')
84
def _relpath(base, path):
85
"""Return path relative to base, or raise exception.
87
The path may be either an absolute path or a path relative to the
88
current working directory.
90
Lifted out of Branch.relpath for ease of testing.
92
os.path.commonprefix (python2.4) has a bad bug that it works just
93
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
94
avoids that problem."""
95
rp = os.path.abspath(path)
99
while len(head) >= len(base):
102
head, tail = os.path.split(head)
106
from errors import NotBranchError
107
raise NotBranchError("path %r is not within branch %r" % (rp, base))
109
return os.sep.join(s)
112
def find_branch_root(f=None):
113
"""Find the branch root enclosing f, or pwd.
115
f may be a filename or a URL.
117
It is not necessary that f exists.
119
Basically we keep looking up until we find the control directory or
120
run into the root. If there isn't one, raises NotBranchError.
124
elif hasattr(os.path, 'realpath'):
125
f = os.path.realpath(f)
127
f = os.path.abspath(f)
128
if not os.path.exists(f):
129
raise BzrError('%r does not exist' % f)
135
if os.path.exists(os.path.join(f, bzrlib.BZRDIR)):
137
head, tail = os.path.split(f)
139
# reached the root, whatever that may be
140
raise bzrlib.errors.NotBranchError('%s is not in a branch' % orig_f)
145
# XXX: move into bzrlib.errors; subclass BzrError
146
class DivergedBranches(Exception):
147
def __init__(self, branch1, branch2):
148
self.branch1 = branch1
149
self.branch2 = branch2
150
Exception.__init__(self, "These branches have diverged.")
66
def find_branch(*ignored, **ignored_too):
67
# XXX: leave this here for about one release, then remove it
68
raise NotImplementedError('find_branch() is not supported anymore, '
69
'please use one of the new branch constructors')
72
def needs_read_lock(unbound):
73
"""Decorate unbound to take out and release a read lock."""
74
def decorated(self, *args, **kwargs):
77
return unbound(self, *args, **kwargs)
83
def needs_write_lock(unbound):
84
"""Decorate unbound to take out and release a write lock."""
85
def decorated(self, *args, **kwargs):
88
return unbound(self, *args, **kwargs)
153
93
######################################################################
157
97
"""Branch holding a history of revisions.
160
Base directory of the branch.
100
Base directory/url of the branch.
104
def __init__(self, *ignored, **ignored_too):
105
raise NotImplementedError('The Branch class is abstract')
108
def open_downlevel(base):
109
"""Open a branch which may be of an old format.
111
Only local branches are supported."""
112
return _Branch(get_transport(base), relax_version_check=True)
116
"""Open an existing branch, rooted at 'base' (url)"""
117
t = get_transport(base)
118
mutter("trying to open %r with transport %r", base, t)
122
def open_containing(url):
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, it is returned, along with the unused portion of url.
131
t = get_transport(url)
134
return _Branch(t), t.relpath(url)
135
except NotBranchError:
137
new_t = t.clone('..')
138
if new_t.base == t.base:
139
# reached the root, whatever that may be
140
raise NotBranchError(path=url)
144
def initialize(base):
145
"""Create a new branch, rooted at 'base' (url)"""
146
t = get_transport(base)
147
return _Branch(t, init=True)
149
def setup_caching(self, cache_root):
150
"""Subclasses that care about caching should override this, and set
151
up cached stores located under cache_root.
153
self.cache_root = cache_root
156
class _Branch(Branch):
157
"""A branch stored in the actual filesystem.
159
Note that it's "local" in the context of the filesystem; it doesn't
160
really matter if it's on an nfs/smb/afs/coda/... share, as long as
161
it's writable, and can be accessed via the normal filesystem API.
163
164
None, or 'r' or 'w'
180
184
# This should match a prefix with a function which accepts
181
185
REVISION_NAMESPACES = {}
183
def __init__(self, base, init=False, find_root=True):
187
def push_stores(self, branch_to):
188
"""Copy the content of this branches store to branch_to."""
189
if (self._branch_format != branch_to._branch_format
190
or self._branch_format != 4):
191
from bzrlib.fetch import greedy_fetch
192
mutter("falling back to fetch logic to push between %s(%s) and %s(%s)",
193
self, self._branch_format, branch_to, branch_to._branch_format)
194
greedy_fetch(to_branch=branch_to, from_branch=self,
195
revision=self.last_revision())
198
store_pairs = ((self.text_store, branch_to.text_store),
199
(self.inventory_store, branch_to.inventory_store),
200
(self.revision_store, branch_to.revision_store))
202
for from_store, to_store in store_pairs:
203
copy_all(from_store, to_store)
204
except UnlistableStore:
205
raise UnlistableBranch(from_store)
207
def __init__(self, transport, init=False,
208
relax_version_check=False):
184
209
"""Create new branch object at a particular location.
186
base -- Base directory for the branch.
211
transport -- A Transport object, defining how to access files.
212
(If a string, transport.transport() will be used to
213
create a Transport object)
188
215
init -- If True, create new control files in a previously
189
216
unversioned directory. If False, the branch must already
192
find_root -- If true and init is false, find the root of the
193
existing branch containing base.
219
relax_version_check -- If true, the usual check for the branch
220
version is not applied. This is intended only for
221
upgrade/recovery type use; it's not guaranteed that
222
all operations will work on old format branches.
195
224
In the test suite, creation of new trees is tested using the
196
225
`ScratchBranch` class.
227
assert isinstance(transport, Transport), \
228
"%r is not a Transport" % transport
229
self._transport = transport
199
self.base = os.path.realpath(base)
200
231
self._make_control()
202
self.base = find_branch_root(base)
204
self.base = os.path.realpath(base)
205
if not isdir(self.controlfilename('.')):
206
from errors import NotBranchError
207
raise NotBranchError("not a bzr branch: %s" % quotefn(base),
208
['use "bzr init" to initialize a new working tree',
209
'current bzr can only operate from top-of-tree'])
212
self.weave_store = WeaveStore(self.controlfilename('weaves'))
213
self.revision_store = ImmutableStore(self.controlfilename('revision-store'))
232
self._check_format(relax_version_check)
234
def get_store(name, compressed=True, prefixed=False):
235
# FIXME: This approach of assuming stores are all entirely compressed
236
# or entirely uncompressed is tidy, but breaks upgrade from
237
# some existing branches where there's a mixture; we probably
238
# still want the option to look for both.
239
relpath = self._rel_controlfilename(name)
241
store = CompressedTextStore(self._transport.clone(relpath),
244
store = TextStore(self._transport.clone(relpath),
246
#if self._transport.should_cache():
247
# cache_path = os.path.join(self.cache_root, name)
248
# os.mkdir(cache_path)
249
# store = bzrlib.store.CachedStore(store, cache_path)
251
def get_weave(name, prefixed=False):
252
relpath = self._rel_controlfilename(name)
253
ws = WeaveStore(self._transport.clone(relpath), prefixed=prefixed)
254
if self._transport.should_cache():
255
ws.enable_cache = True
258
if self._branch_format == 4:
259
self.inventory_store = get_store('inventory-store')
260
self.text_store = get_store('text-store')
261
self.revision_store = get_store('revision-store')
262
elif self._branch_format == 5:
263
self.control_weaves = get_weave('')
264
self.weave_store = get_weave('weaves')
265
self.revision_store = get_store('revision-store', compressed=False)
266
elif self._branch_format == 6:
267
self.control_weaves = get_weave('')
268
self.weave_store = get_weave('weaves', prefixed=True)
269
self.revision_store = get_store('revision-store', compressed=False,
271
self.revision_store.register_suffix('sig')
272
self._transaction = None
216
274
def __str__(self):
217
return '%s(%r)' % (self.__class__.__name__, self.base)
275
return '%s(%r)' % (self.__class__.__name__, self._transport.base)
220
278
__repr__ = __str__
223
281
def __del__(self):
224
282
if self._lock_mode or self._lock:
225
from warnings import warn
283
# XXX: This should show something every time, and be suitable for
284
# headless operation and embedding
226
285
warn("branch %r was not explicitly unlocked" % self)
227
286
self._lock.unlock()
288
# TODO: It might be best to do this somewhere else,
289
# but it is nice for a Branch object to automatically
290
# cache it's information.
291
# Alternatively, we could have the Transport objects cache requests
292
# See the earlier discussion about how major objects (like Branch)
293
# should never expect their __del__ function to run.
294
if hasattr(self, 'cache_root') and self.cache_root is not None:
297
shutil.rmtree(self.cache_root)
300
self.cache_root = None
304
return self._transport.base
307
base = property(_get_base, doc="The URL for the root of this branch.")
309
def _finish_transaction(self):
310
"""Exit the current transaction."""
311
if self._transaction is None:
312
raise errors.LockError('Branch %s is not in a transaction' %
314
transaction = self._transaction
315
self._transaction = None
318
def get_transaction(self):
319
"""Return the current active transaction.
321
If no transaction is active, this returns a passthrough object
322
for which all data is immedaitely flushed and no caching happens.
324
if self._transaction is None:
325
return transactions.PassThroughTransaction()
327
return self._transaction
329
def _set_transaction(self, new_transaction):
330
"""Set a new active transaction."""
331
if self._transaction is not None:
332
raise errors.LockError('Branch %s is in a transaction already.' %
334
self._transaction = new_transaction
230
336
def lock_write(self):
337
mutter("lock write: %s (%s)", self, self._lock_count)
338
# TODO: Upgrade locking to support using a Transport,
339
# and potentially a remote locking protocol
231
340
if self._lock_mode:
232
341
if self._lock_mode != 'w':
233
from errors import LockError
234
342
raise LockError("can't upgrade to a write lock from %r" %
236
344
self._lock_count += 1
238
from bzrlib.lock import WriteLock
240
self._lock = WriteLock(self.controlfilename('branch-lock'))
346
self._lock = self._transport.lock_write(
347
self._rel_controlfilename('branch-lock'))
241
348
self._lock_mode = 'w'
242
349
self._lock_count = 1
350
self._set_transaction(transactions.PassThroughTransaction())
245
352
def lock_read(self):
353
mutter("lock read: %s (%s)", self, self._lock_count)
246
354
if self._lock_mode:
247
355
assert self._lock_mode in ('r', 'w'), \
248
356
"invalid lock mode %r" % self._lock_mode
249
357
self._lock_count += 1
251
from bzrlib.lock import ReadLock
253
self._lock = ReadLock(self.controlfilename('branch-lock'))
359
self._lock = self._transport.lock_read(
360
self._rel_controlfilename('branch-lock'))
254
361
self._lock_mode = 'r'
255
362
self._lock_count = 1
363
self._set_transaction(transactions.ReadOnlyTransaction())
364
# 5K may be excessive, but hey, its a knob.
365
self.get_transaction().set_cache_size(5000)
257
367
def unlock(self):
368
mutter("unlock: %s (%s)", self, self._lock_count)
258
369
if not self._lock_mode:
259
from errors import LockError
260
370
raise LockError('branch %r is not locked' % (self))
262
372
if self._lock_count > 1:
263
373
self._lock_count -= 1
375
self._finish_transaction()
265
376
self._lock.unlock()
266
377
self._lock = None
267
378
self._lock_mode = self._lock_count = None
269
380
def abspath(self, name):
270
"""Return absolute filename for something in the branch"""
271
return os.path.join(self.base, name)
273
def relpath(self, path):
274
"""Return path relative to this branch of something inside it.
276
Raises an error if path is not in this branch."""
277
return _relpath(self.base, path)
381
"""Return absolute filename for something in the branch
383
XXX: Robert Collins 20051017 what is this used for? why is it a branch
384
method and not a tree method.
386
return self._transport.abspath(name)
388
def _rel_controlfilename(self, file_or_path):
389
if not isinstance(file_or_path, basestring):
390
file_or_path = '/'.join(file_or_path)
391
if file_or_path == '':
393
return bzrlib.transport.urlescape(bzrlib.BZRDIR + '/' + file_or_path)
279
395
def controlfilename(self, file_or_path):
280
396
"""Return location relative to branch."""
281
if isinstance(file_or_path, basestring):
282
file_or_path = [file_or_path]
283
return os.path.join(self.base, bzrlib.BZRDIR, *file_or_path)
397
return self._transport.abspath(self._rel_controlfilename(file_or_path))
286
399
def controlfile(self, file_or_path, mode='r'):
287
400
"""Open a control file for this branch.
294
407
Controlfiles should almost never be opened in write mode but
295
408
rather should be atomically copied and replaced using atomicfile.
298
fn = self.controlfilename(file_or_path)
300
if mode == 'rb' or mode == 'wb':
301
return file(fn, mode)
302
elif mode == 'r' or mode == 'w':
303
# open in binary mode anyhow so there's no newline translation;
304
# codecs uses line buffering by default; don't want that.
306
return codecs.open(fn, mode + 'b', 'utf-8',
412
relpath = self._rel_controlfilename(file_or_path)
413
#TODO: codecs.open() buffers linewise, so it was overloaded with
414
# a much larger buffer, do we need to do the same for getreader/getwriter?
416
return self._transport.get(relpath)
418
raise BzrError("Branch.controlfile(mode='wb') is not supported, use put_controlfiles")
420
return codecs.getreader('utf-8')(self._transport.get(relpath), errors='replace')
422
raise BzrError("Branch.controlfile(mode='w') is not supported, use put_controlfiles")
309
424
raise BzrError("invalid controlfile mode %r" % mode)
426
def put_controlfile(self, path, f, encode=True):
427
"""Write an entry as a controlfile.
429
:param path: The path to put the file, relative to the .bzr control
431
:param f: A file-like or string object whose contents should be copied.
432
:param encode: If true, encode the contents as utf-8
434
self.put_controlfiles([(path, f)], encode=encode)
436
def put_controlfiles(self, files, encode=True):
437
"""Write several entries as controlfiles.
439
:param files: A list of [(path, file)] pairs, where the path is the directory
440
underneath the bzr control directory
441
:param encode: If true, encode the contents as utf-8
445
for path, f in files:
447
if isinstance(f, basestring):
448
f = f.encode('utf-8', 'replace')
450
f = codecs.getwriter('utf-8')(f, errors='replace')
451
path = self._rel_controlfilename(path)
452
ctrl_files.append((path, f))
453
self._transport.put_multi(ctrl_files)
311
455
def _make_control(self):
312
os.mkdir(self.controlfilename([]))
313
self.controlfile('README', 'w').write(
314
"This is a Bazaar-NG control directory.\n"
315
"Do not change any files in this directory.\n")
316
self.controlfile('branch-format', 'w').write(BZR_BRANCH_FORMAT_5)
317
for d in ('text-store', 'revision-store',
319
os.mkdir(self.controlfilename(d))
320
for f in ('revision-history', 'merged-patches',
321
'pending-merged-patches', 'branch-name',
324
self.controlfile(f, 'w').write('')
325
mutter('created control directory in ' + self.base)
456
from bzrlib.inventory import Inventory
457
from bzrlib.weavefile import write_weave_v5
458
from bzrlib.weave import Weave
460
# Create an empty inventory
327
462
# if we want per-tree root ids then this is the place to set
328
463
# them; they're not needed for now and so ommitted for
330
f = self.controlfile('inventory','w')
331
bzrlib.xml5.serializer_v5.write_inventory(Inventory(), f)
335
def _check_format(self):
465
bzrlib.xml5.serializer_v5.write_inventory(Inventory(), sio)
466
empty_inv = sio.getvalue()
468
bzrlib.weavefile.write_weave_v5(Weave(), sio)
469
empty_weave = sio.getvalue()
471
dirs = [[], 'revision-store', 'weaves']
473
"This is a Bazaar-NG control directory.\n"
474
"Do not change any files in this directory.\n"),
475
('branch-format', BZR_BRANCH_FORMAT_6),
476
('revision-history', ''),
479
('pending-merges', ''),
480
('inventory', empty_inv),
481
('inventory.weave', empty_weave),
482
('ancestry.weave', empty_weave)
484
cfn = self._rel_controlfilename
485
self._transport.mkdir_multi([cfn(d) for d in dirs])
486
self.put_controlfiles(files)
487
mutter('created control directory in ' + self._transport.base)
489
def _check_format(self, relax_version_check):
336
490
"""Check this branch format is supported.
338
492
The format level is stored, as an integer, in
341
495
In the future, we might need different in-memory Branch
342
496
classes to support downlevel branches. But not yet.
344
fmt = self.controlfile('branch-format', 'r').read()
345
if fmt == BZR_BRANCH_FORMAT_5:
499
fmt = self.controlfile('branch-format', 'r').read()
501
raise NotBranchError(path=self.base)
502
mutter("got branch format %r", fmt)
503
if fmt == BZR_BRANCH_FORMAT_6:
504
self._branch_format = 6
505
elif fmt == BZR_BRANCH_FORMAT_5:
346
506
self._branch_format = 5
348
raise BzrError('sorry, branch format "%s" not supported; '
349
'use a different bzr version, '
350
'or run "bzr upgrade", '
351
'or remove the .bzr directory and "bzr init" again'
352
% fmt.rstrip('\n\r'))
507
elif fmt == BZR_BRANCH_FORMAT_4:
508
self._branch_format = 4
510
if (not relax_version_check
511
and self._branch_format not in (5, 6)):
512
raise errors.UnsupportedFormatError(
513
'sorry, branch format %r not supported' % fmt,
514
['use a different bzr version',
515
'or remove the .bzr directory'
516
' and "bzr init" again'])
354
518
def get_root_id(self):
355
519
"""Return the id of this branches root"""
368
532
entry.parent_id = inv.root.file_id
369
533
self._write_inventory(inv)
371
536
def read_working_inventory(self):
372
537
"""Read the working inventory."""
375
# ElementTree does its own conversion from UTF-8, so open in
377
f = self.controlfile('inventory', 'rb')
378
return bzrlib.xml5.serializer_v5.read_inventory(f)
538
# ElementTree does its own conversion from UTF-8, so open in
540
f = self.controlfile('inventory', 'rb')
541
return bzrlib.xml5.serializer_v5.read_inventory(f)
383
544
def _write_inventory(self, inv):
384
545
"""Update the working inventory.
386
547
That is to say, the inventory describing changes underway, that
387
548
will be committed to the next revision.
389
from bzrlib.atomicfile import AtomicFile
393
f = AtomicFile(self.controlfilename('inventory'), 'wb')
395
bzrlib.xml5.serializer_v5.write_inventory(inv, f)
550
from cStringIO import StringIO
552
bzrlib.xml5.serializer_v5.write_inventory(inv, sio)
554
# Transport handles atomicity
555
self.put_controlfile('inventory', sio)
402
557
mutter('wrote working inventory')
405
559
inventory = property(read_working_inventory, _write_inventory, None,
406
560
"""Inventory for the working copy.""")
409
563
def add(self, files, ids=None):
410
564
"""Make files versioned.
442
596
assert(len(ids) == len(files))
446
inv = self.read_working_inventory()
447
for f,file_id in zip(files, ids):
448
if is_control_file(f):
449
raise BzrError("cannot add control file %s" % quotefn(f))
454
raise BzrError("cannot add top-level %r" % f)
456
fullpath = os.path.normpath(self.abspath(f))
459
kind = file_kind(fullpath)
461
# maybe something better?
462
raise BzrError('cannot add: not a regular file or directory: %s' % quotefn(f))
464
if kind != 'file' and kind != 'directory':
465
raise BzrError('cannot add: not a regular file or directory: %s' % quotefn(f))
468
file_id = gen_file_id(f)
469
inv.add_path(f, kind=kind, file_id=file_id)
471
mutter("add file %s file_id:{%s} kind=%r" % (f, file_id, kind))
473
self._write_inventory(inv)
598
inv = self.read_working_inventory()
599
for f,file_id in zip(files, ids):
600
if is_control_file(f):
601
raise BzrError("cannot add control file %s" % quotefn(f))
606
raise BzrError("cannot add top-level %r" % f)
608
fullpath = os.path.normpath(self.abspath(f))
611
kind = file_kind(fullpath)
613
# maybe something better?
614
raise BzrError('cannot add: not a regular file, symlink or directory: %s' % quotefn(f))
616
if not InventoryEntry.versionable_kind(kind):
617
raise BzrError('cannot add: not a versionable file ('
618
'i.e. regular file, symlink or directory): %s' % quotefn(f))
621
file_id = gen_file_id(f)
622
inv.add_path(f, kind=kind, file_id=file_id)
624
mutter("add file %s file_id:{%s} kind=%r" % (f, file_id, kind))
626
self._write_inventory(inv)
478
629
def print_file(self, file, revno):
479
630
"""Print `file` to stdout."""
482
tree = self.revision_tree(self.lookup_revision(revno))
483
# use inventory as it was in that revision
484
file_id = tree.inventory.path2id(file)
486
raise BzrError("%r is not present in revision %s" % (file, revno))
487
tree.print_file(file_id)
492
def remove(self, files, verbose=False):
493
"""Mark nominated files for removal from the inventory.
495
This does not remove their text. This does not run on
497
TODO: Refuse to remove modified files unless --force is given?
499
TODO: Do something useful with directories.
501
TODO: Should this remove the text or not? Tough call; not
502
removing may be useful and the user can just use use rm, and
503
is the opposite of add. Removing it is consistent with most
504
other tools. Maybe an option.
506
## TODO: Normalize names
507
## TODO: Remove nested loops; better scalability
508
if isinstance(files, basestring):
514
tree = self.working_tree()
517
# do this before any modifications
521
raise BzrError("cannot remove unversioned file %s" % quotefn(f))
522
mutter("remove inventory entry %s {%s}" % (quotefn(f), fid))
524
# having remove it, it must be either ignored or unknown
525
if tree.is_ignored(f):
529
show_status(new_status, inv[fid].kind, quotefn(f))
532
self._write_inventory(inv)
631
tree = self.revision_tree(self.get_rev_id(revno))
632
# use inventory as it was in that revision
633
file_id = tree.inventory.path2id(file)
635
raise BzrError("%r is not present in revision %s" % (file, revno))
636
tree.print_file(file_id)
537
638
# FIXME: this doesn't need to be a branch method
538
639
def set_inventory(self, new_inventory_list):
542
643
name = os.path.basename(path)
545
inv.add(InventoryEntry(file_id, name, kind, parent))
646
# fixme, there should be a factory function inv,add_??
647
if kind == 'directory':
648
inv.add(inventory.InventoryDirectory(file_id, name, parent))
650
inv.add(inventory.InventoryFile(file_id, name, parent))
651
elif kind == 'symlink':
652
inv.add(inventory.InventoryLink(file_id, name, parent))
654
raise BzrError("unknown kind %r" % kind)
546
655
self._write_inventory(inv)
549
657
def unknowns(self):
550
658
"""Return all unknown files.
552
660
These are files in the working directory that are not versioned or
553
661
control files or ignored.
663
>>> from bzrlib.workingtree import WorkingTree
555
664
>>> b = ScratchBranch(files=['foo', 'foo~'])
556
>>> list(b.unknowns())
665
>>> map(str, b.unknowns())
559
668
>>> list(b.unknowns())
670
>>> WorkingTree(b.base, b).remove('foo')
562
671
>>> list(b.unknowns())
565
674
return self.working_tree().unknowns()
568
677
def append_revision(self, *revision_ids):
569
from bzrlib.atomicfile import AtomicFile
571
678
for revision_id in revision_ids:
572
679
mutter("add {%s} to revision-history" % revision_id)
574
680
rev_history = self.revision_history()
575
681
rev_history.extend(revision_ids)
577
f = AtomicFile(self.controlfilename('revision-history'))
579
for rev_id in rev_history:
682
self.set_revision_history(rev_history)
685
def set_revision_history(self, rev_history):
686
self.put_controlfile('revision-history', '\n'.join(rev_history))
688
def has_revision(self, revision_id):
689
"""True if this branch has a copy of the revision.
691
This does not necessarily imply the revision is merge
692
or on the mainline."""
693
return (revision_id is None
694
or self.revision_store.has_id(revision_id))
586
697
def get_revision_xml_file(self, revision_id):
587
698
"""Return XML file object for revision object."""
588
699
if not revision_id or not isinstance(revision_id, basestring):
589
700
raise InvalidRevisionId(revision_id)
594
return self.revision_store[revision_id]
596
raise bzrlib.errors.NoSuchRevision(self, revision_id)
702
return self.revision_store.get(revision_id)
703
except (IndexError, KeyError):
704
raise bzrlib.errors.NoSuchRevision(self, revision_id)
602
707
get_revision_xml = get_revision_xml_file
709
def get_revision_xml(self, revision_id):
710
return self.get_revision_xml_file(revision_id).read()
605
713
def get_revision(self, revision_id):
606
714
"""Return the Revision object for a named revision"""
648
753
# the revision, (add signatures/remove signatures) and still
649
754
# have all hash pointers stay consistent.
650
755
# But for now, just hash the contents.
651
return bzrlib.osutils.sha_file(self.get_revision_xml(revision_id))
756
return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
654
758
def get_ancestry(self, revision_id):
655
759
"""Return a list of revision-ids integrated by a revision.
761
This currently returns a list, but the ordering is not guaranteed:
657
w = self.weave_store.get_weave(ANCESTRY_FILEID)
659
return [l[:-1] for l in w.get_iter(w.lookup(revision_id))]
764
if revision_id is None:
766
w = self.get_inventory_weave()
767
return [None] + map(w.idx_to_name,
768
w.inclusions([w.lookup(revision_id)]))
662
770
def get_inventory_weave(self):
663
return self.weave_store.get_weave(INVENTORY_FILEID)
771
return self.control_weaves.get_weave('inventory',
772
self.get_transaction())
666
774
def get_inventory(self, revision_id):
667
775
"""Get Inventory object by hash."""
668
# FIXME: The text gets passed around a lot coming from the weave.
669
f = StringIO(self.get_inventory_xml(revision_id))
670
return bzrlib.xml5.serializer_v5.read_inventory(f)
776
xml = self.get_inventory_xml(revision_id)
777
return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
673
779
def get_inventory_xml(self, revision_id):
674
780
"""Get inventory XML as a file object."""
696
801
return self.get_inventory(revision_id)
699
804
def revision_history(self):
700
"""Return sequence of revision hashes on to this branch.
702
>>> ScratchBranch().revision_history()
707
return [l.rstrip('\r\n') for l in
708
self.controlfile('revision-history', 'r').readlines()]
713
def common_ancestor(self, other, self_revno=None, other_revno=None):
716
>>> sb = ScratchBranch(files=['foo', 'foo~'])
717
>>> sb.common_ancestor(sb) == (None, None)
719
>>> commit.commit(sb, "Committing first revision")
720
>>> sb.common_ancestor(sb)[0]
722
>>> clone = sb.clone()
723
>>> commit.commit(sb, "Committing second revision")
724
>>> sb.common_ancestor(sb)[0]
726
>>> sb.common_ancestor(clone)[0]
728
>>> commit.commit(clone, "Committing divergent second revision")
729
>>> sb.common_ancestor(clone)[0]
731
>>> sb.common_ancestor(clone) == clone.common_ancestor(sb)
733
>>> sb.common_ancestor(sb) != clone.common_ancestor(clone)
735
>>> clone2 = sb.clone()
736
>>> sb.common_ancestor(clone2)[0]
738
>>> sb.common_ancestor(clone2, self_revno=1)[0]
740
>>> sb.common_ancestor(clone2, other_revno=1)[0]
743
my_history = self.revision_history()
744
other_history = other.revision_history()
745
if self_revno is None:
746
self_revno = len(my_history)
747
if other_revno is None:
748
other_revno = len(other_history)
749
indices = range(min((self_revno, other_revno)))
752
if my_history[r] == other_history[r]:
753
return r+1, my_history[r]
805
"""Return sequence of revision hashes on to this branch."""
806
transaction = self.get_transaction()
807
history = transaction.map.find_revision_history()
808
if history is not None:
809
mutter("cache hit for revision-history in %s", self)
811
history = [l.rstrip('\r\n') for l in
812
self.controlfile('revision-history', 'r').readlines()]
813
transaction.map.add_revision_history(history)
814
# this call is disabled because revision_history is
815
# not really an object yet, and the transaction is for objects.
816
# transaction.register_clean(history, precious=True)
758
820
"""Return current revision number for this branch.
812
873
if stop_revision is None:
813
874
stop_revision = other_len
814
elif stop_revision > other_len:
815
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
876
assert isinstance(stop_revision, int)
877
if stop_revision > other_len:
878
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
817
879
return other_history[self_len:stop_revision]
820
881
def update_revisions(self, other, stop_revision=None):
821
"""Pull in all new revisions from other branch.
882
"""Pull in new perfect-fit revisions."""
823
883
from bzrlib.fetch import greedy_fetch
825
pb = bzrlib.ui.ui_factory.progress_bar()
826
pb.update('comparing histories')
828
revision_ids = self.missing_revisions(other, stop_revision)
830
if len(revision_ids) > 0:
831
count = greedy_fetch(self, other, revision_ids[-1], pb)[0]
834
self.append_revision(*revision_ids)
835
## note("Added %d revisions." % count)
884
if stop_revision is None:
885
stop_revision = other.last_revision()
886
### Should this be checking is_ancestor instead of revision_history?
887
if (stop_revision is not None and
888
stop_revision in self.revision_history()):
890
greedy_fetch(to_branch=self, from_branch=other,
891
revision=stop_revision)
892
pullable_revs = self.pullable_revisions(other, stop_revision)
893
if len(pullable_revs) > 0:
894
self.append_revision(*pullable_revs)
896
def pullable_revisions(self, other, stop_revision):
897
other_revno = other.revision_id_to_revno(stop_revision)
899
return self.missing_revisions(other, other_revno)
900
except DivergedBranches, e:
902
pullable_revs = get_intervening_revisions(self.last_revision(),
904
assert self.last_revision() not in pullable_revs
906
except bzrlib.errors.NotAncestor:
907
if is_ancestor(self.last_revision(), stop_revision, self):
839
912
def commit(self, *args, **kw):
840
913
from bzrlib.commit import Commit
841
914
Commit().commit(self, *args, **kw)
844
def lookup_revision(self, revision):
845
"""Return the revision identifier for a given revision information."""
846
revno, info = self._get_revision_info(revision)
850
916
def revision_id_to_revno(self, revision_id):
851
917
"""Given a revision id, return its revno"""
918
if revision_id is None:
852
920
history = self.revision_history()
854
922
return history.index(revision_id) + 1
855
923
except ValueError:
856
924
raise bzrlib.errors.NoSuchRevision(self, revision_id)
859
def get_revision_info(self, revision):
860
"""Return (revno, revision id) for revision identifier.
862
revision can be an integer, in which case it is assumed to be revno (though
863
this will translate negative values into positive ones)
864
revision can also be a string, in which case it is parsed for something like
865
'date:' or 'revid:' etc.
867
revno, rev_id = self._get_revision_info(revision)
869
raise bzrlib.errors.NoSuchRevision(self, revision)
872
926
def get_rev_id(self, revno, history=None):
873
927
"""Find the revision id of the specified revno."""
879
933
raise bzrlib.errors.NoSuchRevision(self, revno)
880
934
return history[revno - 1]
882
def _get_revision_info(self, revision):
883
"""Return (revno, revision id) for revision specifier.
885
revision can be an integer, in which case it is assumed to be revno
886
(though this will translate negative values into positive ones)
887
revision can also be a string, in which case it is parsed for something
888
like 'date:' or 'revid:' etc.
890
A revid is always returned. If it is None, the specifier referred to
891
the null revision. If the revid does not occur in the revision
892
history, revno will be None.
898
try:# Convert to int if possible
899
revision = int(revision)
902
revs = self.revision_history()
903
if isinstance(revision, int):
905
revno = len(revs) + revision + 1
908
rev_id = self.get_rev_id(revno, revs)
909
elif isinstance(revision, basestring):
910
for prefix, func in Branch.REVISION_NAMESPACES.iteritems():
911
if revision.startswith(prefix):
912
result = func(self, revs, revision)
914
revno, rev_id = result
917
rev_id = self.get_rev_id(revno, revs)
920
raise BzrError('No namespace registered for string: %r' %
923
raise TypeError('Unhandled revision type %s' % revision)
927
raise bzrlib.errors.NoSuchRevision(self, revision)
930
def _namespace_revno(self, revs, revision):
931
"""Lookup a revision by revision number"""
932
assert revision.startswith('revno:')
934
return (int(revision[6:]),)
937
REVISION_NAMESPACES['revno:'] = _namespace_revno
939
def _namespace_revid(self, revs, revision):
940
assert revision.startswith('revid:')
941
rev_id = revision[len('revid:'):]
943
return revs.index(rev_id) + 1, rev_id
946
REVISION_NAMESPACES['revid:'] = _namespace_revid
948
def _namespace_last(self, revs, revision):
949
assert revision.startswith('last:')
951
offset = int(revision[5:])
956
raise BzrError('You must supply a positive value for --revision last:XXX')
957
return (len(revs) - offset + 1,)
958
REVISION_NAMESPACES['last:'] = _namespace_last
960
def _namespace_tag(self, revs, revision):
961
assert revision.startswith('tag:')
962
raise BzrError('tag: namespace registered, but not implemented.')
963
REVISION_NAMESPACES['tag:'] = _namespace_tag
965
def _namespace_date(self, revs, revision):
966
assert revision.startswith('date:')
968
# Spec for date revisions:
970
# value can be 'yesterday', 'today', 'tomorrow' or a YYYY-MM-DD string.
971
# it can also start with a '+/-/='. '+' says match the first
972
# entry after the given date. '-' is match the first entry before the date
973
# '=' is match the first entry after, but still on the given date.
975
# +2005-05-12 says find the first matching entry after May 12th, 2005 at 0:00
976
# -2005-05-12 says find the first matching entry before May 12th, 2005 at 0:00
977
# =2005-05-12 says find the first match after May 12th, 2005 at 0:00 but before
978
# May 13th, 2005 at 0:00
980
# So the proper way of saying 'give me all entries for today' is:
981
# -r {date:+today}:{date:-tomorrow}
982
# The default is '=' when not supplied
985
if val[:1] in ('+', '-', '='):
986
match_style = val[:1]
989
today = datetime.datetime.today().replace(hour=0,minute=0,second=0,microsecond=0)
990
if val.lower() == 'yesterday':
991
dt = today - datetime.timedelta(days=1)
992
elif val.lower() == 'today':
994
elif val.lower() == 'tomorrow':
995
dt = today + datetime.timedelta(days=1)
998
# This should be done outside the function to avoid recompiling it.
999
_date_re = re.compile(
1000
r'(?P<date>(?P<year>\d\d\d\d)-(?P<month>\d\d)-(?P<day>\d\d))?'
1002
r'(?P<time>(?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d))?)?'
1004
m = _date_re.match(val)
1005
if not m or (not m.group('date') and not m.group('time')):
1006
raise BzrError('Invalid revision date %r' % revision)
1009
year, month, day = int(m.group('year')), int(m.group('month')), int(m.group('day'))
1011
year, month, day = today.year, today.month, today.day
1013
hour = int(m.group('hour'))
1014
minute = int(m.group('minute'))
1015
if m.group('second'):
1016
second = int(m.group('second'))
1020
hour, minute, second = 0,0,0
1022
dt = datetime.datetime(year=year, month=month, day=day,
1023
hour=hour, minute=minute, second=second)
1027
if match_style == '-':
1029
elif match_style == '=':
1030
last = dt + datetime.timedelta(days=1)
1033
for i in range(len(revs)-1, -1, -1):
1034
r = self.get_revision(revs[i])
1035
# TODO: Handle timezone.
1036
dt = datetime.datetime.fromtimestamp(r.timestamp)
1037
if first >= dt and (last is None or dt >= last):
1040
for i in range(len(revs)):
1041
r = self.get_revision(revs[i])
1042
# TODO: Handle timezone.
1043
dt = datetime.datetime.fromtimestamp(r.timestamp)
1044
if first <= dt and (last is None or dt <= last):
1046
REVISION_NAMESPACES['date:'] = _namespace_date
1048
936
def revision_tree(self, revision_id):
1049
937
"""Return Tree for a revision on this branch.
1071
963
If there are no revisions yet, return an `EmptyTree`.
1073
return self.revision_tree(self.last_patch())
965
return self.revision_tree(self.last_revision())
1076
968
def rename_one(self, from_rel, to_rel):
1077
969
"""Rename one file.
1079
971
This can change the directory or the filename or both.
973
tree = self.working_tree()
975
if not tree.has_filename(from_rel):
976
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
977
if tree.has_filename(to_rel):
978
raise BzrError("can't rename: new working file %r already exists" % to_rel)
980
file_id = inv.path2id(from_rel)
982
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
984
if inv.path2id(to_rel):
985
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
987
to_dir, to_tail = os.path.split(to_rel)
988
to_dir_id = inv.path2id(to_dir)
989
if to_dir_id == None and to_dir != '':
990
raise BzrError("can't determine destination directory id for %r" % to_dir)
992
mutter("rename_one:")
993
mutter(" file_id {%s}" % file_id)
994
mutter(" from_rel %r" % from_rel)
995
mutter(" to_rel %r" % to_rel)
996
mutter(" to_dir %r" % to_dir)
997
mutter(" to_dir_id {%s}" % to_dir_id)
999
inv.rename(file_id, to_dir_id, to_tail)
1001
from_abs = self.abspath(from_rel)
1002
to_abs = self.abspath(to_rel)
1083
tree = self.working_tree()
1084
inv = tree.inventory
1085
if not tree.has_filename(from_rel):
1086
raise BzrError("can't rename: old working file %r does not exist" % from_rel)
1087
if tree.has_filename(to_rel):
1088
raise BzrError("can't rename: new working file %r already exists" % to_rel)
1090
file_id = inv.path2id(from_rel)
1092
raise BzrError("can't rename: old name %r is not versioned" % from_rel)
1094
if inv.path2id(to_rel):
1095
raise BzrError("can't rename: new name %r is already versioned" % to_rel)
1097
to_dir, to_tail = os.path.split(to_rel)
1098
to_dir_id = inv.path2id(to_dir)
1099
if to_dir_id == None and to_dir != '':
1100
raise BzrError("can't determine destination directory id for %r" % to_dir)
1102
mutter("rename_one:")
1103
mutter(" file_id {%s}" % file_id)
1104
mutter(" from_rel %r" % from_rel)
1105
mutter(" to_rel %r" % to_rel)
1106
mutter(" to_dir %r" % to_dir)
1107
mutter(" to_dir_id {%s}" % to_dir_id)
1109
inv.rename(file_id, to_dir_id, to_tail)
1111
from_abs = self.abspath(from_rel)
1112
to_abs = self.abspath(to_rel)
1114
os.rename(from_abs, to_abs)
1116
raise BzrError("failed to rename %r to %r: %s"
1117
% (from_abs, to_abs, e[1]),
1118
["rename rolled back"])
1120
self._write_inventory(inv)
1004
rename(from_abs, to_abs)
1006
raise BzrError("failed to rename %r to %r: %s"
1007
% (from_abs, to_abs, e[1]),
1008
["rename rolled back"])
1010
self._write_inventory(inv)
1125
1013
def move(self, from_paths, to_name):
1126
1014
"""Rename files.
1137
1025
entry that is moved.
1142
## TODO: Option to move IDs only
1143
assert not isinstance(from_paths, basestring)
1144
tree = self.working_tree()
1145
inv = tree.inventory
1146
to_abs = self.abspath(to_name)
1147
if not isdir(to_abs):
1148
raise BzrError("destination %r is not a directory" % to_abs)
1149
if not tree.has_filename(to_name):
1150
raise BzrError("destination %r not in working directory" % to_abs)
1151
to_dir_id = inv.path2id(to_name)
1152
if to_dir_id == None and to_name != '':
1153
raise BzrError("destination %r is not a versioned directory" % to_name)
1154
to_dir_ie = inv[to_dir_id]
1155
if to_dir_ie.kind not in ('directory', 'root_directory'):
1156
raise BzrError("destination %r is not a directory" % to_abs)
1158
to_idpath = inv.get_idpath(to_dir_id)
1160
for f in from_paths:
1161
if not tree.has_filename(f):
1162
raise BzrError("%r does not exist in working tree" % f)
1163
f_id = inv.path2id(f)
1165
raise BzrError("%r is not versioned" % f)
1166
name_tail = splitpath(f)[-1]
1167
dest_path = appendpath(to_name, name_tail)
1168
if tree.has_filename(dest_path):
1169
raise BzrError("destination %r already exists" % dest_path)
1170
if f_id in to_idpath:
1171
raise BzrError("can't move %r to a subdirectory of itself" % f)
1173
# OK, so there's a race here, it's possible that someone will
1174
# create a file in this interval and then the rename might be
1175
# left half-done. But we should have caught most problems.
1177
for f in from_paths:
1178
name_tail = splitpath(f)[-1]
1179
dest_path = appendpath(to_name, name_tail)
1180
result.append((f, dest_path))
1181
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1183
os.rename(self.abspath(f), self.abspath(dest_path))
1185
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1186
["rename rolled back"])
1188
self._write_inventory(inv)
1028
## TODO: Option to move IDs only
1029
assert not isinstance(from_paths, basestring)
1030
tree = self.working_tree()
1031
inv = tree.inventory
1032
to_abs = self.abspath(to_name)
1033
if not isdir(to_abs):
1034
raise BzrError("destination %r is not a directory" % to_abs)
1035
if not tree.has_filename(to_name):
1036
raise BzrError("destination %r not in working directory" % to_abs)
1037
to_dir_id = inv.path2id(to_name)
1038
if to_dir_id == None and to_name != '':
1039
raise BzrError("destination %r is not a versioned directory" % to_name)
1040
to_dir_ie = inv[to_dir_id]
1041
if to_dir_ie.kind not in ('directory', 'root_directory'):
1042
raise BzrError("destination %r is not a directory" % to_abs)
1044
to_idpath = inv.get_idpath(to_dir_id)
1046
for f in from_paths:
1047
if not tree.has_filename(f):
1048
raise BzrError("%r does not exist in working tree" % f)
1049
f_id = inv.path2id(f)
1051
raise BzrError("%r is not versioned" % f)
1052
name_tail = splitpath(f)[-1]
1053
dest_path = appendpath(to_name, name_tail)
1054
if tree.has_filename(dest_path):
1055
raise BzrError("destination %r already exists" % dest_path)
1056
if f_id in to_idpath:
1057
raise BzrError("can't move %r to a subdirectory of itself" % f)
1059
# OK, so there's a race here, it's possible that someone will
1060
# create a file in this interval and then the rename might be
1061
# left half-done. But we should have caught most problems.
1063
for f in from_paths:
1064
name_tail = splitpath(f)[-1]
1065
dest_path = appendpath(to_name, name_tail)
1066
result.append((f, dest_path))
1067
inv.rename(inv.path2id(f), to_dir_id, name_tail)
1069
rename(self.abspath(f), self.abspath(dest_path))
1071
raise BzrError("failed to rename %r to %r: %s" % (f, dest_path, e[1]),
1072
["rename rolled back"])
1074
self._write_inventory(inv)
1326
1194
if revno < 1 or revno > self.revno():
1327
1195
raise InvalidRevisionNumber(revno)
1332
class ScratchBranch(Branch):
1197
def sign_revision(self, revision_id, gpg_strategy):
1198
plaintext = Testament.from_revision(self, revision_id).as_short_text()
1199
self.store_revision_signature(gpg_strategy, plaintext, revision_id)
1202
def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
1203
self.revision_store.add(StringIO(gpg_strategy.sign(plaintext)),
1207
class ScratchBranch(_Branch):
1333
1208
"""Special test class: a branch that cleans up after itself.
1335
1210
>>> b = ScratchBranch()
1336
1211
>>> isdir(b.base)
1338
1213
>>> bd = b.base
1214
>>> b._transport.__del__()
1343
def __init__(self, files=[], dirs=[], base=None):
1219
def __init__(self, files=[], dirs=[], transport=None):
1344
1220
"""Make a test branch.
1346
1222
This creates a temporary directory and runs init-tree in it.
1348
1224
If any files are listed, they are created in the working copy.
1350
from tempfile import mkdtemp
1355
Branch.__init__(self, base, init=init)
1226
if transport is None:
1227
transport = bzrlib.transport.local.ScratchTransport()
1228
super(ScratchBranch, self).__init__(transport, init=True)
1230
super(ScratchBranch, self).__init__(transport)
1357
os.mkdir(self.abspath(d))
1233
self._transport.mkdir(d)
1359
1235
for f in files:
1360
file(os.path.join(self.base, f), 'w').write('content of %s' % f)
1236
self._transport.put(f, 'content of %s' % f)
1363
1239
def clone(self):
1365
1241
>>> orig = ScratchBranch(files=["file1", "file2"])
1366
1242
>>> clone = orig.clone()
1367
>>> os.path.samefile(orig.base, clone.base)
1243
>>> if os.name != 'nt':
1244
... os.path.samefile(orig.base, clone.base)
1246
... orig.base == clone.base
1369
1249
>>> os.path.isfile(os.path.join(clone.base, "file1"))
1453
1311
return gen_file_id('TREE_ROOT')
1456
def pull_loc(branch):
1457
# TODO: Should perhaps just make attribute be 'base' in
1458
# RemoteBranch and Branch?
1459
if hasattr(branch, "baseurl"):
1460
return branch.baseurl
1465
def copy_branch(branch_from, to_location, revision=None):
1466
"""Copy branch_from into the existing directory to_location.
1469
If not None, only revisions up to this point will be copied.
1470
The head of the new branch will be that revision.
1473
The name of a local directory that exists but is empty.
1475
from bzrlib.merge import merge
1476
from bzrlib.branch import Branch
1478
assert isinstance(branch_from, Branch)
1479
assert isinstance(to_location, basestring)
1481
br_to = Branch(to_location, init=True)
1482
br_to.set_root_id(branch_from.get_root_id())
1483
if revision is None:
1484
revno = branch_from.revno()
1486
revno, rev_id = branch_from.get_revision_info(revision)
1487
br_to.update_revisions(branch_from, stop_revision=revno)
1488
merge((to_location, -1), (to_location, 0), this_dir=to_location,
1489
check_clean=False, ignore_zero=True)
1491
from_location = pull_loc(branch_from)
1492
br_to.set_parent(pull_loc(branch_from))