21
from warnings import warn
22
from cStringIO import StringIO
26
from bzrlib.inventory import InventoryEntry
27
import bzrlib.inventory as inventory
22
28
from bzrlib.trace import mutter, note
23
from bzrlib.osutils import isdir, quotefn, compact_date, rand_bytes, \
25
sha_file, appendpath, file_kind
26
from bzrlib.errors import BzrError, InvalidRevisionNumber, InvalidRevisionId
29
from bzrlib.osutils import (isdir, quotefn, compact_date, rand_bytes,
30
rename, splitpath, sha_file, appendpath,
32
from bzrlib.errors import (BzrError, InvalidRevisionNumber, InvalidRevisionId,
33
NoSuchRevision, HistoryMissing, NotBranchError,
34
DivergedBranches, LockError, UnlistableStore,
35
UnlistableBranch, NoSuchFile)
28
36
from bzrlib.textui import show_status
29
from bzrlib.revision import Revision
30
from bzrlib.xml import unpack_xml
37
from bzrlib.revision import Revision, is_ancestor
31
38
from bzrlib.delta import compare_trees
32
39
from bzrlib.tree import EmptyTree, RevisionTree
34
BZR_BRANCH_FORMAT = "Bazaar-NG branch, format 0.0.4\n"
40
from bzrlib.inventory import Inventory
41
from bzrlib.store import copy_all
42
from bzrlib.store.compressed_text import CompressedTextStore
43
from bzrlib.store.text import TextStore
44
from bzrlib.store.weave import WeaveStore
45
from bzrlib.transport import Transport, get_transport
50
BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
51
BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
35
52
## TODO: Maybe include checks for common corruption of newlines, etc?
38
55
# TODO: Some operations like log might retrieve the same revisions
39
56
# repeatedly to calculate deltas. We could perhaps have a weakref
40
# cache in memory to make this faster.
43
def find_branch(f, **args):
44
if f and (f.startswith('http://') or f.startswith('https://')):
46
return remotebranch.RemoteBranch(f, **args)
48
return Branch(f, **args)
51
def find_cached_branch(f, cache_root, **args):
52
from remotebranch import RemoteBranch
53
br = find_branch(f, **args)
54
def cacheify(br, store_name):
55
from meta_store import CachedStore
56
cache_path = os.path.join(cache_root, store_name)
58
new_store = CachedStore(getattr(br, store_name), cache_path)
59
setattr(br, store_name, new_store)
61
if isinstance(br, RemoteBranch):
62
cacheify(br, 'inventory_store')
63
cacheify(br, 'text_store')
64
cacheify(br, 'revision_store')
57
# cache in memory to make this faster. In general anything can be
58
# cached in memory between lock and unlock operations.
60
def find_branch(*ignored, **ignored_too):
61
# XXX: leave this here for about one release, then remove it
62
raise NotImplementedError('find_branch() is not supported anymore, '
63
'please use one of the new branch constructors')
68
64
def _relpath(base, path):
69
65
"""Return path relative to base, or raise exception.
150
177
Lock object from bzrlib.lock.
179
# We actually expect this class to be somewhat short-lived; part of its
180
# purpose is to try to isolate what bits of the branch logic are tied to
181
# filesystem access, so that in a later step, we can extricate them to
182
# a separarte ("storage") class.
153
183
_lock_mode = None
154
184
_lock_count = None
186
_inventory_weave = None
157
188
# Map some sort of prefix into a namespace
158
189
# stuff like "revno:10", "revid:", etc.
159
190
# This should match a prefix with a function which accepts
160
191
REVISION_NAMESPACES = {}
162
def __init__(self, base, init=False, find_root=True):
193
def push_stores(self, branch_to):
194
"""Copy the content of this branches store to branch_to."""
195
if (self._branch_format != branch_to._branch_format
196
or self._branch_format != 4):
197
from bzrlib.fetch import greedy_fetch
198
mutter("falling back to fetch logic to push between %s(%s) and %s(%s)",
199
self, self._branch_format, branch_to, branch_to._branch_format)
200
greedy_fetch(to_branch=branch_to, from_branch=self,
201
revision=self.last_revision())
204
store_pairs = ((self.text_store, branch_to.text_store),
205
(self.inventory_store, branch_to.inventory_store),
206
(self.revision_store, branch_to.revision_store))
208
for from_store, to_store in store_pairs:
209
copy_all(from_store, to_store)
210
except UnlistableStore:
211
raise UnlistableBranch(from_store)
213
def __init__(self, transport, init=False,
214
relax_version_check=False):
163
215
"""Create new branch object at a particular location.
165
base -- Base directory for the branch.
217
transport -- A Transport object, defining how to access files.
218
(If a string, transport.transport() will be used to
219
create a Transport object)
167
221
init -- If True, create new control files in a previously
168
222
unversioned directory. If False, the branch must already
171
find_root -- If true and init is false, find the root of the
172
existing branch containing base.
225
relax_version_check -- If true, the usual check for the branch
226
version is not applied. This is intended only for
227
upgrade/recovery type use; it's not guaranteed that
228
all operations will work on old format branches.
174
230
In the test suite, creation of new trees is tested using the
175
231
`ScratchBranch` class.
177
from bzrlib.store import ImmutableStore
233
assert isinstance(transport, Transport), \
234
"%r is not a Transport" % transport
235
self._transport = transport
179
self.base = os.path.realpath(base)
180
237
self._make_control()
182
self.base = find_branch_root(base)
184
self.base = os.path.realpath(base)
185
if not isdir(self.controlfilename('.')):
186
from errors import NotBranchError
187
raise NotBranchError("not a bzr branch: %s" % quotefn(base),
188
['use "bzr init" to initialize a new working tree',
189
'current bzr can only operate from top-of-tree'])
192
self.text_store = ImmutableStore(self.controlfilename('text-store'))
193
self.revision_store = ImmutableStore(self.controlfilename('revision-store'))
194
self.inventory_store = ImmutableStore(self.controlfilename('inventory-store'))
238
self._check_format(relax_version_check)
240
def get_store(name, compressed=True):
241
# FIXME: This approach of assuming stores are all entirely compressed
242
# or entirely uncompressed is tidy, but breaks upgrade from
243
# some existing branches where there's a mixture; we probably
244
# still want the option to look for both.
245
relpath = self._rel_controlfilename(name)
247
store = CompressedTextStore(self._transport.clone(relpath))
249
store = TextStore(self._transport.clone(relpath))
250
#if self._transport.should_cache():
251
# cache_path = os.path.join(self.cache_root, name)
252
# os.mkdir(cache_path)
253
# store = bzrlib.store.CachedStore(store, cache_path)
256
relpath = self._rel_controlfilename(name)
257
ws = WeaveStore(self._transport.clone(relpath))
258
if self._transport.should_cache():
259
ws.enable_cache = True
262
if self._branch_format == 4:
263
self.inventory_store = get_store('inventory-store')
264
self.text_store = get_store('text-store')
265
self.revision_store = get_store('revision-store')
266
elif self._branch_format == 5:
267
self.control_weaves = get_weave([])
268
self.weave_store = get_weave('weaves')
269
self.revision_store = get_store('revision-store', compressed=False)
197
271
def __str__(self):
198
return '%s(%r)' % (self.__class__.__name__, self.base)
272
return '%s(%r)' % (self.__class__.__name__, self._transport.base)
201
275
__repr__ = __str__
282
373
Controlfiles should almost never be opened in write mode but
283
374
rather should be atomically copied and replaced using atomicfile.
286
fn = self.controlfilename(file_or_path)
288
if mode == 'rb' or mode == 'wb':
289
return file(fn, mode)
290
elif mode == 'r' or mode == 'w':
291
# open in binary mode anyhow so there's no newline translation;
292
# codecs uses line buffering by default; don't want that.
294
return codecs.open(fn, mode + 'b', 'utf-8',
378
relpath = self._rel_controlfilename(file_or_path)
379
#TODO: codecs.open() buffers linewise, so it was overloaded with
380
# a much larger buffer, do we need to do the same for getreader/getwriter?
382
return self._transport.get(relpath)
384
raise BzrError("Branch.controlfile(mode='wb') is not supported, use put_controlfiles")
386
return codecs.getreader('utf-8')(self._transport.get(relpath), errors='replace')
388
raise BzrError("Branch.controlfile(mode='w') is not supported, use put_controlfiles")
297
390
raise BzrError("invalid controlfile mode %r" % mode)
392
def put_controlfile(self, path, f, encode=True):
393
"""Write an entry as a controlfile.
395
:param path: The path to put the file, relative to the .bzr control
397
:param f: A file-like or string object whose contents should be copied.
398
:param encode: If true, encode the contents as utf-8
400
self.put_controlfiles([(path, f)], encode=encode)
402
def put_controlfiles(self, files, encode=True):
403
"""Write several entries as controlfiles.
405
:param files: A list of [(path, file)] pairs, where the path is the directory
406
underneath the bzr control directory
407
:param encode: If true, encode the contents as utf-8
411
for path, f in files:
413
if isinstance(f, basestring):
414
f = f.encode('utf-8', 'replace')
416
f = codecs.getwriter('utf-8')(f, errors='replace')
417
path = self._rel_controlfilename(path)
418
ctrl_files.append((path, f))
419
self._transport.put_multi(ctrl_files)
301
421
def _make_control(self):
302
422
from bzrlib.inventory import Inventory
303
from bzrlib.xml import pack_xml
423
from bzrlib.weavefile import write_weave_v5
424
from bzrlib.weave import Weave
305
os.mkdir(self.controlfilename([]))
306
self.controlfile('README', 'w').write(
426
# Create an empty inventory
428
# if we want per-tree root ids then this is the place to set
429
# them; they're not needed for now and so ommitted for
431
bzrlib.xml5.serializer_v5.write_inventory(Inventory(), sio)
432
empty_inv = sio.getvalue()
434
bzrlib.weavefile.write_weave_v5(Weave(), sio)
435
empty_weave = sio.getvalue()
437
dirs = [[], 'revision-store', 'weaves']
307
439
"This is a Bazaar-NG control directory.\n"
308
"Do not change any files in this directory.\n")
309
self.controlfile('branch-format', 'w').write(BZR_BRANCH_FORMAT)
310
for d in ('text-store', 'inventory-store', 'revision-store'):
311
os.mkdir(self.controlfilename(d))
312
for f in ('revision-history', 'merged-patches',
313
'pending-merged-patches', 'branch-name',
316
self.controlfile(f, 'w').write('')
317
mutter('created control directory in ' + self.base)
319
pack_xml(Inventory(gen_root_id()), self.controlfile('inventory','w'))
322
def _check_format(self):
440
"Do not change any files in this directory.\n"),
441
('branch-format', BZR_BRANCH_FORMAT_5),
442
('revision-history', ''),
445
('pending-merges', ''),
446
('inventory', empty_inv),
447
('inventory.weave', empty_weave),
448
('ancestry.weave', empty_weave)
450
cfn = self._rel_controlfilename
451
self._transport.mkdir_multi([cfn(d) for d in dirs])
452
self.put_controlfiles(files)
453
mutter('created control directory in ' + self._transport.base)
455
def _check_format(self, relax_version_check):
323
456
"""Check this branch format is supported.
325
The current tool only supports the current unstable format.
458
The format level is stored, as an integer, in
459
self._branch_format for code that needs to check it later.
327
461
In the future, we might need different in-memory Branch
328
462
classes to support downlevel branches. But not yet.
330
# This ignores newlines so that we can open branches created
331
# on Windows from Linux and so on. I think it might be better
332
# to always make all internal files in unix format.
333
fmt = self.controlfile('branch-format', 'r').read()
334
fmt.replace('\r\n', '')
335
if fmt != BZR_BRANCH_FORMAT:
465
fmt = self.controlfile('branch-format', 'r').read()
467
raise NotBranchError(self.base)
469
if fmt == BZR_BRANCH_FORMAT_5:
470
self._branch_format = 5
471
elif fmt == BZR_BRANCH_FORMAT_4:
472
self._branch_format = 4
474
if (not relax_version_check
475
and self._branch_format != 5):
336
476
raise BzrError('sorry, branch format %r not supported' % fmt,
337
477
['use a different bzr version',
338
'or remove the .bzr directory and "bzr init" again'])
478
'or remove the .bzr directory'
479
' and "bzr init" again'])
340
481
def get_root_id(self):
341
482
"""Return the id of this branches root"""
645
778
# the revision, (add signatures/remove signatures) and still
646
779
# have all hash pointers stay consistent.
647
780
# But for now, just hash the contents.
648
return bzrlib.osutils.sha_file(self.get_revision_xml(revision_id))
651
def get_inventory(self, inventory_id):
652
"""Get Inventory object by hash.
654
TODO: Perhaps for this and similar methods, take a revision
655
parameter which can be either an integer revno or a
657
from bzrlib.inventory import Inventory
658
from bzrlib.xml import unpack_xml
660
return unpack_xml(Inventory, self.inventory_store[inventory_id])
663
def get_inventory_sha1(self, inventory_id):
781
return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
783
def _get_ancestry_weave(self):
784
return self.control_weaves.get_weave('ancestry')
786
def get_ancestry(self, revision_id):
787
"""Return a list of revision-ids integrated by a revision."""
788
if revision_id is None:
790
w = self._get_ancestry_weave()
791
return [None] + [l[:-1] for l in w.get_iter(w.lookup(revision_id))]
793
def get_inventory_weave(self):
794
return self.control_weaves.get_weave('inventory')
796
def get_inventory(self, revision_id):
797
"""Get Inventory object by hash."""
798
xml = self.get_inventory_xml(revision_id)
799
return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
801
def get_inventory_xml(self, revision_id):
802
"""Get inventory XML as a file object."""
804
assert isinstance(revision_id, basestring), type(revision_id)
805
iw = self.get_inventory_weave()
806
return iw.get_text(iw.lookup(revision_id))
808
raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
810
def get_inventory_sha1(self, revision_id):
664
811
"""Return the sha1 hash of the inventory entry
666
return sha_file(self.inventory_store[inventory_id])
813
return self.get_revision(revision_id).inventory_sha1
669
815
def get_revision_inventory(self, revision_id):
670
816
"""Return inventory of a past revision."""
671
# bzr 0.0.6 imposes the constraint that the inventory_id
817
# TODO: Unify this with get_inventory()
818
# bzr 0.0.6 and later imposes the constraint that the inventory_id
672
819
# must be the same as its revision, so this is trivial.
673
820
if revision_id == None:
674
from bzrlib.inventory import Inventory
675
821
return Inventory(self.get_root_id())
677
823
return self.get_inventory(revision_id)
680
825
def revision_history(self):
681
"""Return sequence of revision hashes on to this branch.
683
>>> ScratchBranch().revision_history()
826
"""Return sequence of revision hashes on to this branch."""
688
829
return [l.rstrip('\r\n') for l in
794
938
if stop_revision is None:
795
939
stop_revision = other_len
796
elif stop_revision > other_len:
797
raise NoSuchRevision(self, stop_revision)
941
assert isinstance(stop_revision, int)
942
if stop_revision > other_len:
943
raise bzrlib.errors.NoSuchRevision(self, stop_revision)
799
944
return other_history[self_len:stop_revision]
802
946
def update_revisions(self, other, stop_revision=None):
803
"""Pull in all new revisions from other branch.
805
>>> from bzrlib.commit import commit
806
>>> bzrlib.trace.silent = True
807
>>> br1 = ScratchBranch(files=['foo', 'bar'])
810
>>> commit(br1, "lala!", rev_id="REVISION-ID-1", verbose=False)
811
>>> br2 = ScratchBranch()
812
>>> br2.update_revisions(br1)
816
>>> br2.revision_history()
818
>>> br2.update_revisions(br1)
822
>>> br1.text_store.total_size() == br2.text_store.total_size()
825
from bzrlib.progress import ProgressBar
829
pb.update('comparing histories')
830
revision_ids = self.missing_revisions(other, stop_revision)
832
if hasattr(other.revision_store, "prefetch"):
833
other.revision_store.prefetch(revision_ids)
834
if hasattr(other.inventory_store, "prefetch"):
835
inventory_ids = [other.get_revision(r).inventory_id
836
for r in revision_ids]
837
other.inventory_store.prefetch(inventory_ids)
842
for rev_id in revision_ids:
844
pb.update('fetching revision', i, len(revision_ids))
845
rev = other.get_revision(rev_id)
846
revisions.append(rev)
847
inv = other.get_inventory(str(rev.inventory_id))
848
for key, entry in inv.iter_entries():
849
if entry.text_id is None:
851
if entry.text_id not in self.text_store:
852
needed_texts.add(entry.text_id)
856
count = self.text_store.copy_multi(other.text_store, needed_texts)
857
print "Added %d texts." % count
858
inventory_ids = [ f.inventory_id for f in revisions ]
859
count = self.inventory_store.copy_multi(other.inventory_store,
861
print "Added %d inventories." % count
862
revision_ids = [ f.revision_id for f in revisions]
863
count = self.revision_store.copy_multi(other.revision_store,
865
for revision_id in revision_ids:
866
self.append_revision(revision_id)
867
print "Added %d revisions." % count
947
"""Pull in new perfect-fit revisions."""
948
from bzrlib.fetch import greedy_fetch
949
from bzrlib.revision import get_intervening_revisions
950
if stop_revision is None:
951
stop_revision = other.last_revision()
952
greedy_fetch(to_branch=self, from_branch=other,
953
revision=stop_revision)
954
pullable_revs = self.missing_revisions(
955
other, other.revision_id_to_revno(stop_revision))
957
greedy_fetch(to_branch=self,
959
revision=pullable_revs[-1])
960
self.append_revision(*pullable_revs)
870
963
def commit(self, *args, **kw):
871
from bzrlib.commit import commit
872
commit(self, *args, **kw)
875
def lookup_revision(self, revision):
876
"""Return the revision identifier for a given revision information."""
877
revno, info = self.get_revision_info(revision)
880
def get_revision_info(self, revision):
881
"""Return (revno, revision id) for revision identifier.
883
revision can be an integer, in which case it is assumed to be revno (though
884
this will translate negative values into positive ones)
885
revision can also be a string, in which case it is parsed for something like
886
'date:' or 'revid:' etc.
891
try:# Convert to int if possible
892
revision = int(revision)
895
revs = self.revision_history()
896
if isinstance(revision, int):
899
# Mabye we should do this first, but we don't need it if revision == 0
901
revno = len(revs) + revision + 1
904
elif isinstance(revision, basestring):
905
for prefix, func in Branch.REVISION_NAMESPACES.iteritems():
906
if revision.startswith(prefix):
907
revno = func(self, revs, revision)
910
raise BzrError('No namespace registered for string: %r' % revision)
912
if revno is None or revno <= 0 or revno > len(revs):
913
raise BzrError("no such revision %s" % revision)
914
return revno, revs[revno-1]
916
def _namespace_revno(self, revs, revision):
917
"""Lookup a revision by revision number"""
918
assert revision.startswith('revno:')
920
return int(revision[6:])
923
REVISION_NAMESPACES['revno:'] = _namespace_revno
925
def _namespace_revid(self, revs, revision):
926
assert revision.startswith('revid:')
928
return revs.index(revision[6:]) + 1
931
REVISION_NAMESPACES['revid:'] = _namespace_revid
933
def _namespace_last(self, revs, revision):
934
assert revision.startswith('last:')
936
offset = int(revision[5:])
941
raise BzrError('You must supply a positive value for --revision last:XXX')
942
return len(revs) - offset + 1
943
REVISION_NAMESPACES['last:'] = _namespace_last
945
def _namespace_tag(self, revs, revision):
946
assert revision.startswith('tag:')
947
raise BzrError('tag: namespace registered, but not implemented.')
948
REVISION_NAMESPACES['tag:'] = _namespace_tag
950
def _namespace_date(self, revs, revision):
951
assert revision.startswith('date:')
953
# Spec for date revisions:
955
# value can be 'yesterday', 'today', 'tomorrow' or a YYYY-MM-DD string.
956
# it can also start with a '+/-/='. '+' says match the first
957
# entry after the given date. '-' is match the first entry before the date
958
# '=' is match the first entry after, but still on the given date.
960
# +2005-05-12 says find the first matching entry after May 12th, 2005 at 0:00
961
# -2005-05-12 says find the first matching entry before May 12th, 2005 at 0:00
962
# =2005-05-12 says find the first match after May 12th, 2005 at 0:00 but before
963
# May 13th, 2005 at 0:00
965
# So the proper way of saying 'give me all entries for today' is:
966
# -r {date:+today}:{date:-tomorrow}
967
# The default is '=' when not supplied
970
if val[:1] in ('+', '-', '='):
971
match_style = val[:1]
974
today = datetime.datetime.today().replace(hour=0,minute=0,second=0,microsecond=0)
975
if val.lower() == 'yesterday':
976
dt = today - datetime.timedelta(days=1)
977
elif val.lower() == 'today':
979
elif val.lower() == 'tomorrow':
980
dt = today + datetime.timedelta(days=1)
983
# This should be done outside the function to avoid recompiling it.
984
_date_re = re.compile(
985
r'(?P<date>(?P<year>\d\d\d\d)-(?P<month>\d\d)-(?P<day>\d\d))?'
987
r'(?P<time>(?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d))?)?'
989
m = _date_re.match(val)
990
if not m or (not m.group('date') and not m.group('time')):
991
raise BzrError('Invalid revision date %r' % revision)
994
year, month, day = int(m.group('year')), int(m.group('month')), int(m.group('day'))
996
year, month, day = today.year, today.month, today.day
998
hour = int(m.group('hour'))
999
minute = int(m.group('minute'))
1000
if m.group('second'):
1001
second = int(m.group('second'))
1005
hour, minute, second = 0,0,0
1007
dt = datetime.datetime(year=year, month=month, day=day,
1008
hour=hour, minute=minute, second=second)
1012
if match_style == '-':
1014
elif match_style == '=':
1015
last = dt + datetime.timedelta(days=1)
1018
for i in range(len(revs)-1, -1, -1):
1019
r = self.get_revision(revs[i])
1020
# TODO: Handle timezone.
1021
dt = datetime.datetime.fromtimestamp(r.timestamp)
1022
if first >= dt and (last is None or dt >= last):
1025
for i in range(len(revs)):
1026
r = self.get_revision(revs[i])
1027
# TODO: Handle timezone.
1028
dt = datetime.datetime.fromtimestamp(r.timestamp)
1029
if first <= dt and (last is None or dt <= last):
1031
REVISION_NAMESPACES['date:'] = _namespace_date
964
from bzrlib.commit import Commit
965
Commit().commit(self, *args, **kw)
967
def revision_id_to_revno(self, revision_id):
968
"""Given a revision id, return its revno"""
969
if revision_id is None:
971
history = self.revision_history()
973
return history.index(revision_id) + 1
975
raise bzrlib.errors.NoSuchRevision(self, revision_id)
977
def get_rev_id(self, revno, history=None):
978
"""Find the revision id of the specified revno."""
982
history = self.revision_history()
983
elif revno <= 0 or revno > len(history):
984
raise bzrlib.errors.NoSuchRevision(self, revno)
985
return history[revno - 1]
1033
987
def revision_tree(self, revision_id):
1034
988
"""Return Tree for a revision on this branch.
1240
def add_pending_merge(self, revision_id):
1241
from bzrlib.revision import validate_revision_id
1243
validate_revision_id(revision_id)
1198
def add_pending_merge(self, *revision_ids):
1199
# TODO: Perhaps should check at this point that the
1200
# history of the revision is actually present?
1245
1201
p = self.pending_merges()
1246
if revision_id in p:
1248
p.append(revision_id)
1249
self.set_pending_merges(p)
1203
for rev_id in revision_ids:
1209
self.set_pending_merges(p)
1252
1211
def set_pending_merges(self, rev_list):
1214
self.put_controlfile('pending-merges', '\n'.join(rev_list))
1219
def get_parent(self):
1220
"""Return the parent location of the branch.
1222
This is the default location for push/pull/missing. The usual
1223
pattern is that the user can override it by specifying a
1227
_locs = ['parent', 'pull', 'x-pull']
1230
return self.controlfile(l, 'r').read().strip('\n')
1232
if e.errno != errno.ENOENT:
1237
def set_parent(self, url):
1238
# TODO: Maybe delete old location files?
1253
1239
from bzrlib.atomicfile import AtomicFile
1254
1240
self.lock_write()
1256
f = AtomicFile(self.controlfilename('pending-merges'))
1242
f = AtomicFile(self.controlfilename('parent'))
1268
class ScratchBranch(Branch):
1251
def check_revno(self, revno):
1253
Check whether a revno corresponds to any revision.
1254
Zero (the NULL revision) is considered valid.
1257
self.check_real_revno(revno)
1259
def check_real_revno(self, revno):
1261
Check whether a revno corresponds to a real revision.
1262
Zero (the NULL revision) is considered invalid
1264
if revno < 1 or revno > self.revno():
1265
raise InvalidRevisionNumber(revno)
1271
class ScratchBranch(_Branch):
1269
1272
"""Special test class: a branch that cleans up after itself.
1271
1274
>>> b = ScratchBranch()