1
# Copyright (C) 2005-2010 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
from cStringIO import StringIO
19
from bzrlib.lazy_import import lazy_import
20
lazy_import(globals(), """
25
from bzrlib.bundle import serializer as _serializer
26
from bzrlib.merge_directive import MergeDirective
27
from bzrlib.transport import (
28
do_catching_redirections,
32
from bzrlib.trace import note
35
def read_mergeable_from_url(url, _do_directive=True, possible_transports=None):
36
"""Read mergable object from a given URL.
38
:return: An object supporting get_target_revision. Raises NotABundle if
39
the target is not a mergeable type.
41
child_transport = get_transport(url,
42
possible_transports=possible_transports)
43
transport = child_transport.clone('..')
44
filename = transport.relpath(child_transport.base)
45
mergeable, transport = read_mergeable_from_transport(transport, filename,
50
def read_mergeable_from_transport(transport, filename, _do_directive=True):
51
def get_bundle(transport):
52
return StringIO(transport.get_bytes(filename)), transport
54
def redirected_transport(transport, exception, redirection_notice):
55
note(redirection_notice)
56
url, filename = urlutils.split(exception.target,
57
exclude_trailing_slash=False)
59
raise errors.NotABundle('A directory cannot be a bundle')
60
return get_transport(url)
1
# Copyright (C) 2004 Aaron Bentley <aaron.bentley@utoronto.ca>
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20
from bzrlib.trace import mutter
22
Represent and apply a changeset
24
__docformat__ = "restructuredtext"
28
class OldFailedTreeOp(Exception):
30
Exception.__init__(self, "bzr-tree-change contains files from a"
31
" previous failed merge operation.")
32
def invert_dict(dict):
34
for (key,value) in dict.iteritems():
39
class PatchApply(object):
40
"""Patch application as a kind of content change"""
41
def __init__(self, contents):
44
:param contents: The text of the patch to apply
45
:type contents: str"""
46
self.contents = contents
48
def __eq__(self, other):
49
if not isinstance(other, PatchApply):
51
elif self.contents != other.contents:
56
def __ne__(self, other):
57
return not (self == other)
59
def apply(self, filename, conflict_handler, reverse=False):
60
"""Applies the patch to the specified file.
62
:param filename: the file to apply the patch to
64
:param reverse: If true, apply the patch in reverse
67
input_name = filename+".orig"
69
os.rename(filename, input_name)
71
if e.errno != errno.ENOENT:
73
if conflict_handler.patch_target_missing(filename, self.contents)\
76
os.rename(filename, input_name)
79
status = patch.patch(self.contents, input_name, filename,
81
os.chmod(filename, os.stat(input_name).st_mode)
85
conflict_handler.failed_hunks(filename)
88
class ChangeUnixPermissions(object):
89
"""This is two-way change, suitable for file modification, creation,
91
def __init__(self, old_mode, new_mode):
92
self.old_mode = old_mode
93
self.new_mode = new_mode
95
def apply(self, filename, conflict_handler, reverse=False):
97
from_mode = self.old_mode
98
to_mode = self.new_mode
100
from_mode = self.new_mode
101
to_mode = self.old_mode
103
current_mode = os.stat(filename).st_mode &0777
105
if e.errno == errno.ENOENT:
106
if conflict_handler.missing_for_chmod(filename) == "skip":
109
current_mode = from_mode
111
if from_mode is not None and current_mode != from_mode:
112
if conflict_handler.wrong_old_perms(filename, from_mode,
113
current_mode) != "continue":
116
if to_mode is not None:
118
os.chmod(filename, to_mode)
120
if e.errno == errno.ENOENT:
121
conflict_handler.missing_for_chmod(filename)
123
def __eq__(self, other):
124
if not isinstance(other, ChangeUnixPermissions):
126
elif self.old_mode != other.old_mode:
128
elif self.new_mode != other.new_mode:
133
def __ne__(self, other):
134
return not (self == other)
136
def dir_create(filename, conflict_handler, reverse):
137
"""Creates the directory, or deletes it if reverse is true. Intended to be
138
used with ReplaceContents.
140
:param filename: The name of the directory to create
142
:param reverse: If true, delete the directory, instead
149
if e.errno != errno.EEXIST:
151
if conflict_handler.dir_exists(filename) == "continue":
154
if e.errno == errno.ENOENT:
155
if conflict_handler.missing_parent(filename)=="continue":
156
file(filename, "wb").write(self.contents)
163
if conflict_handler.rmdir_non_empty(filename) == "skip":
170
class SymlinkCreate(object):
171
"""Creates or deletes a symlink (for use with ReplaceContents)"""
172
def __init__(self, contents):
175
:param contents: The filename of the target the symlink should point to
178
self.target = contents
180
def __call__(self, filename, conflict_handler, reverse):
181
"""Creates or destroys the symlink.
183
:param filename: The name of the symlink to create
187
assert(os.readlink(filename) == self.target)
191
os.symlink(self.target, filename)
193
if e.errno != errno.EEXIST:
195
if conflict_handler.link_name_exists(filename) == "continue":
196
os.symlink(self.target, filename)
198
def __eq__(self, other):
199
if not isinstance(other, SymlinkCreate):
201
elif self.target != other.target:
206
def __ne__(self, other):
207
return not (self == other)
209
class FileCreate(object):
210
"""Create or delete a file (for use with ReplaceContents)"""
211
def __init__(self, contents):
214
:param contents: The contents of the file to write
217
self.contents = contents
220
return "FileCreate(%i b)" % len(self.contents)
222
def __eq__(self, other):
223
if not isinstance(other, FileCreate):
225
elif self.contents != other.contents:
230
def __ne__(self, other):
231
return not (self == other)
233
def __call__(self, filename, conflict_handler, reverse):
234
"""Create or delete a file
236
:param filename: The name of the file to create
238
:param reverse: Delete the file instead of creating it
243
file(filename, "wb").write(self.contents)
245
if e.errno == errno.ENOENT:
246
if conflict_handler.missing_parent(filename)=="continue":
247
file(filename, "wb").write(self.contents)
253
if (file(filename, "rb").read() != self.contents):
254
direction = conflict_handler.wrong_old_contents(filename,
256
if direction != "continue":
260
if e.errno != errno.ENOENT:
262
if conflict_handler.missing_for_rm(filename, undo) == "skip":
267
def reversed(sequence):
268
max = len(sequence) - 1
269
for i in range(len(sequence)):
270
yield sequence[max - i]
272
class ReplaceContents(object):
273
"""A contents-replacement framework. It allows a file/directory/symlink to
274
be created, deleted, or replaced with another file/directory/symlink.
275
Arguments must be callable with (filename, reverse).
277
def __init__(self, old_contents, new_contents):
280
:param old_contents: The change to reverse apply (e.g. a deletion), \
282
:type old_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
284
:param new_contents: The second change to apply (e.g. a creation), \
286
:type new_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
289
self.old_contents=old_contents
290
self.new_contents=new_contents
293
return "ReplaceContents(%r -> %r)" % (self.old_contents,
296
def __eq__(self, other):
297
if not isinstance(other, ReplaceContents):
299
elif self.old_contents != other.old_contents:
301
elif self.new_contents != other.new_contents:
305
def __ne__(self, other):
306
return not (self == other)
308
def apply(self, filename, conflict_handler, reverse=False):
309
"""Applies the FileReplacement to the specified filename
311
:param filename: The name of the file to apply changes to
313
:param reverse: If true, apply the change in reverse
317
undo = self.old_contents
318
perform = self.new_contents
320
undo = self.new_contents
321
perform = self.old_contents
325
mode = os.lstat(filename).st_mode
326
if stat.S_ISLNK(mode):
329
if e.errno != errno.ENOENT:
331
if conflict_handler.missing_for_rm(filename, undo) == "skip":
333
undo(filename, conflict_handler, reverse=True)
334
if perform is not None:
335
perform(filename, conflict_handler, reverse=False)
337
os.chmod(filename, mode)
339
class ApplySequence(object):
340
def __init__(self, changes=None):
342
if changes is not None:
343
self.changes.extend(changes)
345
def __eq__(self, other):
346
if not isinstance(other, ApplySequence):
348
elif len(other.changes) != len(self.changes):
351
for i in range(len(self.changes)):
352
if self.changes[i] != other.changes[i]:
356
def __ne__(self, other):
357
return not (self == other)
360
def apply(self, filename, conflict_handler, reverse=False):
364
iter = reversed(self.changes)
366
change.apply(filename, conflict_handler, reverse)
369
class Diff3Merge(object):
370
def __init__(self, base_file, other_file):
371
self.base_file = base_file
372
self.other_file = other_file
374
def __eq__(self, other):
375
if not isinstance(other, Diff3Merge):
377
return (self.base_file == other.base_file and
378
self.other_file == other.other_file)
380
def __ne__(self, other):
381
return not (self == other)
383
def apply(self, filename, conflict_handler, reverse=False):
384
new_file = filename+".new"
386
base = self.base_file
387
other = self.other_file
389
base = self.other_file
390
other = self.base_file
391
status = patch.diff3(new_file, filename, base, other)
393
os.chmod(new_file, os.stat(filename).st_mode)
394
os.rename(new_file, filename)
398
conflict_handler.merge_conflict(new_file, filename, base, other)
402
"""Convenience function to create a directory.
404
:return: A ReplaceContents that will create a directory
405
:rtype: `ReplaceContents`
407
return ReplaceContents(None, dir_create)
410
"""Convenience function to delete a directory.
412
:return: A ReplaceContents that will delete a directory
413
:rtype: `ReplaceContents`
415
return ReplaceContents(dir_create, None)
417
def CreateFile(contents):
418
"""Convenience fucntion to create a file.
420
:param contents: The contents of the file to create
422
:return: A ReplaceContents that will create a file
423
:rtype: `ReplaceContents`
425
return ReplaceContents(None, FileCreate(contents))
427
def DeleteFile(contents):
428
"""Convenience fucntion to delete a file.
430
:param contents: The contents of the file to delete
432
:return: A ReplaceContents that will delete a file
433
:rtype: `ReplaceContents`
435
return ReplaceContents(FileCreate(contents), None)
437
def ReplaceFileContents(old_contents, new_contents):
438
"""Convenience fucntion to replace the contents of a file.
440
:param old_contents: The contents of the file to replace
441
:type old_contents: str
442
:param new_contents: The contents to replace the file with
443
:type new_contents: str
444
:return: A ReplaceContents that will replace the contents of a file a file
445
:rtype: `ReplaceContents`
447
return ReplaceContents(FileCreate(old_contents), FileCreate(new_contents))
449
def CreateSymlink(target):
450
"""Convenience fucntion to create a symlink.
452
:param target: The path the link should point to
454
:return: A ReplaceContents that will delete a file
455
:rtype: `ReplaceContents`
457
return ReplaceContents(None, SymlinkCreate(target))
459
def DeleteSymlink(target):
460
"""Convenience fucntion to delete a symlink.
462
:param target: The path the link should point to
464
:return: A ReplaceContents that will delete a file
465
:rtype: `ReplaceContents`
467
return ReplaceContents(SymlinkCreate(target), None)
469
def ChangeTarget(old_target, new_target):
470
"""Convenience fucntion to change the target of a symlink.
472
:param old_target: The current link target
473
:type old_target: str
474
:param new_target: The new link target to use
475
:type new_target: str
476
:return: A ReplaceContents that will delete a file
477
:rtype: `ReplaceContents`
479
return ReplaceContents(SymlinkCreate(old_target), SymlinkCreate(new_target))
482
class InvalidEntry(Exception):
483
"""Raise when a ChangesetEntry is invalid in some way"""
484
def __init__(self, entry, problem):
487
:param entry: The invalid ChangesetEntry
488
:type entry: `ChangesetEntry`
489
:param problem: The problem with the entry
492
msg = "Changeset entry for %s (%s) is invalid.\n%s" % (entry.id,
495
Exception.__init__(self, msg)
499
class SourceRootHasName(InvalidEntry):
500
"""This changeset entry has a name other than "", but its parent is !NULL"""
501
def __init__(self, entry, name):
504
:param entry: The invalid ChangesetEntry
505
:type entry: `ChangesetEntry`
506
:param name: The name of the entry
509
msg = 'Child of !NULL is named "%s", not "./.".' % name
510
InvalidEntry.__init__(self, entry, msg)
512
class NullIDAssigned(InvalidEntry):
513
"""The id !NULL was assigned to a real entry"""
514
def __init__(self, entry):
517
:param entry: The invalid ChangesetEntry
518
:type entry: `ChangesetEntry`
520
msg = '"!NULL" id assigned to a file "%s".' % entry.path
521
InvalidEntry.__init__(self, entry, msg)
523
class ParentIDIsSelf(InvalidEntry):
524
"""An entry is marked as its own parent"""
525
def __init__(self, entry):
528
:param entry: The invalid ChangesetEntry
529
:type entry: `ChangesetEntry`
531
msg = 'file %s has "%s" id for both self id and parent id.' % \
532
(entry.path, entry.id)
533
InvalidEntry.__init__(self, entry, msg)
535
class ChangesetEntry(object):
536
"""An entry the changeset"""
537
def __init__(self, id, parent, path):
538
"""Constructor. Sets parent and name assuming it was not
539
renamed/created/deleted.
540
:param id: The id associated with the entry
541
:param parent: The id of the parent of this entry (or !NULL if no
543
:param path: The file path relative to the tree root of this entry
549
self.new_parent = parent
550
self.contents_change = None
551
self.metadata_change = None
552
if parent == NULL_ID and path !='./.':
553
raise SourceRootHasName(self, path)
554
if self.id == NULL_ID:
555
raise NullIDAssigned(self)
556
if self.id == self.parent:
557
raise ParentIDIsSelf(self)
560
return "ChangesetEntry(%s)" % self.id
563
if self.path is None:
565
return os.path.dirname(self.path)
567
def __set_dir(self, dir):
568
self.path = os.path.join(dir, os.path.basename(self.path))
570
dir = property(__get_dir, __set_dir)
572
def __get_name(self):
573
if self.path is None:
575
return os.path.basename(self.path)
577
def __set_name(self, name):
578
self.path = os.path.join(os.path.dirname(self.path), name)
580
name = property(__get_name, __set_name)
582
def __get_new_dir(self):
583
if self.new_path is None:
585
return os.path.dirname(self.new_path)
587
def __set_new_dir(self, dir):
588
self.new_path = os.path.join(dir, os.path.basename(self.new_path))
590
new_dir = property(__get_new_dir, __set_new_dir)
592
def __get_new_name(self):
593
if self.new_path is None:
595
return os.path.basename(self.new_path)
597
def __set_new_name(self, name):
598
self.new_path = os.path.join(os.path.dirname(self.new_path), name)
600
new_name = property(__get_new_name, __set_new_name)
602
def needs_rename(self):
603
"""Determines whether the entry requires renaming.
608
return (self.parent != self.new_parent or self.name != self.new_name)
610
def is_deletion(self, reverse):
611
"""Return true if applying the entry would delete a file/directory.
613
:param reverse: if true, the changeset is being applied in reverse
616
return ((self.new_parent is None and not reverse) or
617
(self.parent is None and reverse))
619
def is_creation(self, reverse):
620
"""Return true if applying the entry would create a file/directory.
622
:param reverse: if true, the changeset is being applied in reverse
625
return ((self.parent is None and not reverse) or
626
(self.new_parent is None and reverse))
628
def is_creation_or_deletion(self):
629
"""Return true if applying the entry would create or delete a
634
return self.parent is None or self.new_parent is None
636
def get_cset_path(self, mod=False):
637
"""Determine the path of the entry according to the changeset.
639
:param changeset: The changeset to derive the path from
640
:type changeset: `Changeset`
641
:param mod: If true, generate the MOD path. Otherwise, generate the \
643
:return: the path of the entry, or None if it did not exist in the \
645
:rtype: str or NoneType
648
if self.new_parent == NULL_ID:
650
elif self.new_parent is None:
654
if self.parent == NULL_ID:
656
elif self.parent is None:
660
def summarize_name(self, changeset, reverse=False):
661
"""Produce a one-line summary of the filename. Indicates renames as
662
old => new, indicates creation as None => new, indicates deletion as
665
:param changeset: The changeset to get paths from
666
:type changeset: `Changeset`
667
:param reverse: If true, reverse the names in the output
671
orig_path = self.get_cset_path(False)
672
mod_path = self.get_cset_path(True)
673
if orig_path is not None:
674
orig_path = orig_path[2:]
675
if mod_path is not None:
676
mod_path = mod_path[2:]
677
if orig_path == mod_path:
681
return "%s => %s" % (orig_path, mod_path)
683
return "%s => %s" % (mod_path, orig_path)
686
def get_new_path(self, id_map, changeset, reverse=False):
687
"""Determine the full pathname to rename to
689
:param id_map: The map of ids to filenames for the tree
690
:type id_map: Dictionary
691
:param changeset: The changeset to get data from
692
:type changeset: `Changeset`
693
:param reverse: If true, we're applying the changeset in reverse
697
mutter("Finding new path for %s" % self.summarize_name(changeset))
701
from_dir = self.new_dir
703
from_name = self.new_name
705
parent = self.new_parent
706
to_dir = self.new_dir
708
to_name = self.new_name
709
from_name = self.name
714
if parent == NULL_ID or parent is None:
716
raise SourceRootHasName(self, to_name)
719
if from_dir == to_dir:
720
dir = os.path.dirname(id_map[self.id])
722
mutter("path, new_path: %r %r" % (self.path, self.new_path))
723
parent_entry = changeset.entries[parent]
724
dir = parent_entry.get_new_path(id_map, changeset, reverse)
725
if from_name == to_name:
726
name = os.path.basename(id_map[self.id])
729
assert(from_name is None or from_name == os.path.basename(id_map[self.id]))
730
return os.path.join(dir, name)
733
"""Determines whether the entry does nothing
735
:return: True if the entry does no renames or content changes
738
if self.contents_change is not None:
740
elif self.metadata_change is not None:
742
elif self.parent != self.new_parent:
744
elif self.name != self.new_name:
749
def apply(self, filename, conflict_handler, reverse=False):
750
"""Applies the file content and/or metadata changes.
752
:param filename: the filename of the entry
754
:param reverse: If true, apply the changes in reverse
757
if self.is_deletion(reverse) and self.metadata_change is not None:
758
self.metadata_change.apply(filename, conflict_handler, reverse)
759
if self.contents_change is not None:
760
self.contents_change.apply(filename, conflict_handler, reverse)
761
if not self.is_deletion(reverse) and self.metadata_change is not None:
762
self.metadata_change.apply(filename, conflict_handler, reverse)
764
class IDPresent(Exception):
765
def __init__(self, id):
766
msg = "Cannot add entry because that id has already been used:\n%s" %\
768
Exception.__init__(self, msg)
771
class Changeset(object):
772
"""A set of changes to apply"""
776
def add_entry(self, entry):
777
"""Add an entry to the list of entries"""
778
if self.entries.has_key(entry.id):
779
raise IDPresent(entry.id)
780
self.entries[entry.id] = entry
782
def my_sort(sequence, key, reverse=False):
783
"""A sort function that supports supplying a key for comparison
785
:param sequence: The sequence to sort
786
:param key: A callable object that returns the values to be compared
787
:param reverse: If true, sort in reverse order
790
def cmp_by_key(entry_a, entry_b):
795
return cmp(key(entry_a), key(entry_b))
796
sequence.sort(cmp_by_key)
798
def get_rename_entries(changeset, inventory, reverse):
799
"""Return a list of entries that will be renamed. Entries are sorted from
800
longest to shortest source path and from shortest to longest target path.
802
:param changeset: The changeset to look in
803
:type changeset: `Changeset`
804
:param inventory: The source of current tree paths for the given ids
805
:type inventory: Dictionary
806
:param reverse: If true, the changeset is being applied in reverse
808
:return: source entries and target entries as a tuple
811
source_entries = [x for x in changeset.entries.itervalues()
813
# these are done from longest path to shortest, to avoid deleting a
814
# parent before its children are deleted/renamed
815
def longest_to_shortest(entry):
816
path = inventory.get(entry.id)
821
my_sort(source_entries, longest_to_shortest, reverse=True)
823
target_entries = source_entries[:]
824
# These are done from shortest to longest path, to avoid creating a
825
# child before its parent has been created/renamed
826
def shortest_to_longest(entry):
827
path = entry.get_new_path(inventory, changeset, reverse)
832
my_sort(target_entries, shortest_to_longest)
833
return (source_entries, target_entries)
835
def rename_to_temp_delete(source_entries, inventory, dir, temp_dir,
836
conflict_handler, reverse):
837
"""Delete and rename entries as appropriate. Entries are renamed to temp
838
names. A map of id -> temp name (or None, for deletions) is returned.
840
:param source_entries: The entries to rename and delete
841
:type source_entries: List of `ChangesetEntry`
842
:param inventory: The map of id -> filename in the current tree
843
:type inventory: Dictionary
844
:param dir: The directory to apply changes to
846
:param reverse: Apply changes in reverse
848
:return: a mapping of id to temporary name
852
for i in range(len(source_entries)):
853
entry = source_entries[i]
854
if entry.is_deletion(reverse):
855
path = os.path.join(dir, inventory[entry.id])
856
entry.apply(path, conflict_handler, reverse)
857
temp_name[entry.id] = None
860
to_name = os.path.join(temp_dir, str(i))
861
src_path = inventory.get(entry.id)
862
if src_path is not None:
863
src_path = os.path.join(dir, src_path)
865
os.rename(src_path, to_name)
866
temp_name[entry.id] = to_name
868
if e.errno != errno.ENOENT:
870
if conflict_handler.missing_for_rename(src_path) == "skip":
876
def rename_to_new_create(changed_inventory, target_entries, inventory,
877
changeset, dir, conflict_handler, reverse):
878
"""Rename entries with temp names to their final names, create new files.
880
:param changed_inventory: A mapping of id to temporary name
881
:type changed_inventory: Dictionary
882
:param target_entries: The entries to apply changes to
883
:type target_entries: List of `ChangesetEntry`
884
:param changeset: The changeset to apply
885
:type changeset: `Changeset`
886
:param dir: The directory to apply changes to
888
:param reverse: If true, apply changes in reverse
891
for entry in target_entries:
892
new_tree_path = entry.get_new_path(inventory, changeset, reverse)
893
if new_tree_path is None:
895
new_path = os.path.join(dir, new_tree_path)
896
old_path = changed_inventory.get(entry.id)
897
if os.path.exists(new_path):
898
if conflict_handler.target_exists(entry, new_path, old_path) == \
901
if entry.is_creation(reverse):
902
entry.apply(new_path, conflict_handler, reverse)
903
changed_inventory[entry.id] = new_tree_path
908
os.rename(old_path, new_path)
909
changed_inventory[entry.id] = new_tree_path
911
raise Exception ("%s is missing" % new_path)
913
class TargetExists(Exception):
914
def __init__(self, entry, target):
915
msg = "The path %s already exists" % target
916
Exception.__init__(self, msg)
920
class RenameConflict(Exception):
921
def __init__(self, id, this_name, base_name, other_name):
922
msg = """Trees all have different names for a file
926
id: %s""" % (this_name, base_name, other_name, id)
927
Exception.__init__(self, msg)
928
self.this_name = this_name
929
self.base_name = base_name
930
self_other_name = other_name
932
class MoveConflict(Exception):
933
def __init__(self, id, this_parent, base_parent, other_parent):
934
msg = """The file is in different directories in every tree
938
id: %s""" % (this_parent, base_parent, other_parent, id)
939
Exception.__init__(self, msg)
940
self.this_parent = this_parent
941
self.base_parent = base_parent
942
self_other_parent = other_parent
944
class MergeConflict(Exception):
945
def __init__(self, this_path):
946
Exception.__init__(self, "Conflict applying changes to %s" % this_path)
947
self.this_path = this_path
949
class MergePermissionConflict(Exception):
950
def __init__(self, this_path, base_path, other_path):
951
this_perms = os.stat(this_path).st_mode & 0755
952
base_perms = os.stat(base_path).st_mode & 0755
953
other_perms = os.stat(other_path).st_mode & 0755
954
msg = """Conflicting permission for %s
958
""" % (this_path, this_perms, base_perms, other_perms)
959
self.this_path = this_path
960
self.base_path = base_path
961
self.other_path = other_path
962
Exception.__init__(self, msg)
964
class WrongOldContents(Exception):
965
def __init__(self, filename):
966
msg = "Contents mismatch deleting %s" % filename
967
self.filename = filename
968
Exception.__init__(self, msg)
970
class WrongOldPermissions(Exception):
971
def __init__(self, filename, old_perms, new_perms):
972
msg = "Permission missmatch on %s:\n" \
973
"Expected 0%o, got 0%o." % (filename, old_perms, new_perms)
974
self.filename = filename
975
Exception.__init__(self, msg)
977
class RemoveContentsConflict(Exception):
978
def __init__(self, filename):
979
msg = "Conflict deleting %s, which has different contents in BASE"\
980
" and THIS" % filename
981
self.filename = filename
982
Exception.__init__(self, msg)
984
class DeletingNonEmptyDirectory(Exception):
985
def __init__(self, filename):
986
msg = "Trying to remove dir %s while it still had files" % filename
987
self.filename = filename
988
Exception.__init__(self, msg)
991
class PatchTargetMissing(Exception):
992
def __init__(self, filename):
993
msg = "Attempt to patch %s, which does not exist" % filename
994
Exception.__init__(self, msg)
995
self.filename = filename
997
class MissingPermsFile(Exception):
998
def __init__(self, filename):
999
msg = "Attempt to change permissions on %s, which does not exist" %\
1001
Exception.__init__(self, msg)
1002
self.filename = filename
1004
class MissingForRm(Exception):
1005
def __init__(self, filename):
1006
msg = "Attempt to remove missing path %s" % filename
1007
Exception.__init__(self, msg)
1008
self.filename = filename
1011
class MissingForRename(Exception):
1012
def __init__(self, filename):
1013
msg = "Attempt to move missing path %s" % (filename)
1014
Exception.__init__(self, msg)
1015
self.filename = filename
1017
class NewContentsConflict(Exception):
1018
def __init__(self, filename):
1019
msg = "Conflicting contents for new file %s" % (filename)
1020
Exception.__init__(self, msg)
1023
class MissingForMerge(Exception):
1024
def __init__(self, filename):
1025
msg = "The file %s was modified, but does not exist in this tree"\
1027
Exception.__init__(self, msg)
1030
class ExceptionConflictHandler(object):
1031
def __init__(self, dir):
1034
def missing_parent(self, pathname):
1035
parent = os.path.dirname(pathname)
1036
raise Exception("Parent directory missing for %s" % pathname)
1038
def dir_exists(self, pathname):
1039
raise Exception("Directory already exists for %s" % pathname)
1041
def failed_hunks(self, pathname):
1042
raise Exception("Failed to apply some hunks for %s" % pathname)
1044
def target_exists(self, entry, target, old_path):
1045
raise TargetExists(entry, target)
1047
def rename_conflict(self, id, this_name, base_name, other_name):
1048
raise RenameConflict(id, this_name, base_name, other_name)
1050
def move_conflict(self, id, inventory):
1051
this_dir = inventory.this.get_dir(id)
1052
base_dir = inventory.base.get_dir(id)
1053
other_dir = inventory.other.get_dir(id)
1054
raise MoveConflict(id, this_dir, base_dir, other_dir)
1056
def merge_conflict(self, new_file, this_path, base_path, other_path):
1058
raise MergeConflict(this_path)
1060
def permission_conflict(self, this_path, base_path, other_path):
1061
raise MergePermissionConflict(this_path, base_path, other_path)
1063
def wrong_old_contents(self, filename, expected_contents):
1064
raise WrongOldContents(filename)
1066
def rem_contents_conflict(self, filename, this_contents, base_contents):
1067
raise RemoveContentsConflict(filename)
1069
def wrong_old_perms(self, filename, old_perms, new_perms):
1070
raise WrongOldPermissions(filename, old_perms, new_perms)
1072
def rmdir_non_empty(self, filename):
1073
raise DeletingNonEmptyDirectory(filename)
1075
def link_name_exists(self, filename):
1076
raise TargetExists(filename)
1078
def patch_target_missing(self, filename, contents):
1079
raise PatchTargetMissing(filename)
1081
def missing_for_chmod(self, filename):
1082
raise MissingPermsFile(filename)
1084
def missing_for_rm(self, filename, change):
1085
raise MissingForRm(filename)
1087
def missing_for_rename(self, filename):
1088
raise MissingForRename(filename)
1090
def missing_for_merge(self, file_id, inventory):
1091
raise MissingForMerge(inventory.other.get_path(file_id))
1093
def new_contents_conflict(self, filename, other_contents):
1094
raise NewContentsConflict(filename)
1099
def apply_changeset(changeset, inventory, dir, conflict_handler=None,
1101
"""Apply a changeset to a directory.
1103
:param changeset: The changes to perform
1104
:type changeset: `Changeset`
1105
:param inventory: The mapping of id to filename for the directory
1106
:type inventory: Dictionary
1107
:param dir: The path of the directory to apply the changes to
1109
:param reverse: If true, apply the changes in reverse
1111
:return: The mapping of the changed entries
1114
if conflict_handler is None:
1115
conflict_handler = ExceptionConflictHandler(dir)
1116
temp_dir = os.path.join(dir, "bzr-tree-change")
63
bytef, transport = do_catching_redirections(get_bundle, transport,
65
except errors.TooManyRedirections:
66
raise errors.NotABundle(transport.clone(filename).base)
67
except (errors.ConnectionReset, errors.ConnectionError), e:
69
except (errors.TransportError, errors.PathError), e:
70
raise errors.NotABundle(str(e))
73
# Abstraction leakage, SFTPTransport.get('directory')
74
# doesn't always fail at get() time. Sometimes it fails
75
# during read. And that raises a generic IOError with
76
# just the string 'Failure'
77
# StubSFTPServer does fail during get() (because of prefetch)
78
# so it has an opportunity to translate the error.
79
raise errors.NotABundle(str(e))
83
return MergeDirective.from_lines(bytef), transport
84
except errors.NotAMergeDirective:
87
return _serializer.read_bundle(bytef), transport
1120
if e.errno == errno.EEXIST:
1124
if e.errno == errno.ENOTEMPTY:
1125
raise OldFailedTreeOp()
1130
#apply changes that don't affect filenames
1131
for entry in changeset.entries.itervalues():
1132
if not entry.is_creation_or_deletion():
1133
path = os.path.join(dir, inventory[entry.id])
1134
entry.apply(path, conflict_handler, reverse)
1136
# Apply renames in stages, to minimize conflicts:
1137
# Only files whose name or parent change are interesting, because their
1138
# target name may exist in the source tree. If a directory's name changes,
1139
# that doesn't make its children interesting.
1140
(source_entries, target_entries) = get_rename_entries(changeset, inventory,
1143
changed_inventory = rename_to_temp_delete(source_entries, inventory, dir,
1144
temp_dir, conflict_handler,
1147
rename_to_new_create(changed_inventory, target_entries, inventory,
1148
changeset, dir, conflict_handler, reverse)
1150
return changed_inventory
1153
def apply_changeset_tree(cset, tree, reverse=False):
1155
for entry in tree.source_inventory().itervalues():
1156
inventory[entry.id] = entry.path
1157
new_inventory = apply_changeset(cset, r_inventory, tree.root,
1159
new_entries, remove_entries = \
1160
get_inventory_change(inventory, new_inventory, cset, reverse)
1161
tree.update_source_inventory(new_entries, remove_entries)
1164
def get_inventory_change(inventory, new_inventory, cset, reverse=False):
1167
for entry in cset.entries.itervalues():
1168
if entry.needs_rename():
1169
new_path = entry.get_new_path(inventory, cset)
1170
if new_path is None:
1171
remove_entries.append(entry.id)
1173
new_entries[new_path] = entry.id
1174
return new_entries, remove_entries
1177
def print_changeset(cset):
1178
"""Print all non-boring changeset entries
1180
:param cset: The changeset to print
1181
:type cset: `Changeset`
1183
for entry in cset.entries.itervalues():
1184
if entry.is_boring():
1187
print entry.summarize_name(cset)
1189
class CompositionFailure(Exception):
1190
def __init__(self, old_entry, new_entry, problem):
1191
msg = "Unable to conpose entries.\n %s" % problem
1192
Exception.__init__(self, msg)
1194
class IDMismatch(CompositionFailure):
1195
def __init__(self, old_entry, new_entry):
1196
problem = "Attempt to compose entries with different ids: %s and %s" %\
1197
(old_entry.id, new_entry.id)
1198
CompositionFailure.__init__(self, old_entry, new_entry, problem)
1200
def compose_changesets(old_cset, new_cset):
1201
"""Combine two changesets into one. This works well for exact patching.
1202
Otherwise, not so well.
1204
:param old_cset: The first changeset that would be applied
1205
:type old_cset: `Changeset`
1206
:param new_cset: The second changeset that would be applied
1207
:type new_cset: `Changeset`
1208
:return: A changeset that combines the changes in both changesets
1211
composed = Changeset()
1212
for old_entry in old_cset.entries.itervalues():
1213
new_entry = new_cset.entries.get(old_entry.id)
1214
if new_entry is None:
1215
composed.add_entry(old_entry)
1217
composed_entry = compose_entries(old_entry, new_entry)
1218
if composed_entry.parent is not None or\
1219
composed_entry.new_parent is not None:
1220
composed.add_entry(composed_entry)
1221
for new_entry in new_cset.entries.itervalues():
1222
if not old_cset.entries.has_key(new_entry.id):
1223
composed.add_entry(new_entry)
1226
def compose_entries(old_entry, new_entry):
1227
"""Combine two entries into one.
1229
:param old_entry: The first entry that would be applied
1230
:type old_entry: ChangesetEntry
1231
:param old_entry: The second entry that would be applied
1232
:type old_entry: ChangesetEntry
1233
:return: A changeset entry combining both entries
1234
:rtype: `ChangesetEntry`
1236
if old_entry.id != new_entry.id:
1237
raise IDMismatch(old_entry, new_entry)
1238
output = ChangesetEntry(old_entry.id, old_entry.parent, old_entry.path)
1240
if (old_entry.parent != old_entry.new_parent or
1241
new_entry.parent != new_entry.new_parent):
1242
output.new_parent = new_entry.new_parent
1244
if (old_entry.path != old_entry.new_path or
1245
new_entry.path != new_entry.new_path):
1246
output.new_path = new_entry.new_path
1248
output.contents_change = compose_contents(old_entry, new_entry)
1249
output.metadata_change = compose_metadata(old_entry, new_entry)
1252
def compose_contents(old_entry, new_entry):
1253
"""Combine the contents of two changeset entries. Entries are combined
1254
intelligently where possible, but the fallback behavior returns an
1257
:param old_entry: The first entry that would be applied
1258
:type old_entry: `ChangesetEntry`
1259
:param new_entry: The second entry that would be applied
1260
:type new_entry: `ChangesetEntry`
1261
:return: A combined contents change
1262
:rtype: anything supporting the apply(reverse=False) method
1264
old_contents = old_entry.contents_change
1265
new_contents = new_entry.contents_change
1266
if old_entry.contents_change is None:
1267
return new_entry.contents_change
1268
elif new_entry.contents_change is None:
1269
return old_entry.contents_change
1270
elif isinstance(old_contents, ReplaceContents) and \
1271
isinstance(new_contents, ReplaceContents):
1272
if old_contents.old_contents == new_contents.new_contents:
1275
return ReplaceContents(old_contents.old_contents,
1276
new_contents.new_contents)
1277
elif isinstance(old_contents, ApplySequence):
1278
output = ApplySequence(old_contents.changes)
1279
if isinstance(new_contents, ApplySequence):
1280
output.changes.extend(new_contents.changes)
1282
output.changes.append(new_contents)
1284
elif isinstance(new_contents, ApplySequence):
1285
output = ApplySequence((old_contents.changes,))
1286
output.extend(new_contents.changes)
1289
return ApplySequence((old_contents, new_contents))
1291
def compose_metadata(old_entry, new_entry):
1292
old_meta = old_entry.metadata_change
1293
new_meta = new_entry.metadata_change
1294
if old_meta is None:
1296
elif new_meta is None:
1298
elif isinstance(old_meta, ChangeUnixPermissions) and \
1299
isinstance(new_meta, ChangeUnixPermissions):
1300
return ChangeUnixPermissions(old_meta.old_mode, new_meta.new_mode)
1302
return ApplySequence(old_meta, new_meta)
1305
def changeset_is_null(changeset):
1306
for entry in changeset.entries.itervalues():
1307
if not entry.is_boring():
1311
class UnsuppportedFiletype(Exception):
1312
def __init__(self, full_path, stat_result):
1313
msg = "The file \"%s\" is not a supported filetype." % full_path
1314
Exception.__init__(self, msg)
1315
self.full_path = full_path
1316
self.stat_result = stat_result
1318
def generate_changeset(tree_a, tree_b, inventory_a=None, inventory_b=None):
1319
return ChangesetGenerator(tree_a, tree_b, inventory_a, inventory_b)()
1321
class ChangesetGenerator(object):
1322
def __init__(self, tree_a, tree_b, inventory_a=None, inventory_b=None):
1323
object.__init__(self)
1324
self.tree_a = tree_a
1325
self.tree_b = tree_b
1326
if inventory_a is not None:
1327
self.inventory_a = inventory_a
1329
self.inventory_a = tree_a.inventory()
1330
if inventory_b is not None:
1331
self.inventory_b = inventory_b
1333
self.inventory_b = tree_b.inventory()
1334
self.r_inventory_a = self.reverse_inventory(self.inventory_a)
1335
self.r_inventory_b = self.reverse_inventory(self.inventory_b)
1337
def reverse_inventory(self, inventory):
1339
for entry in inventory.itervalues():
1340
if entry.id is None:
1342
r_inventory[entry.id] = entry
1347
for entry in self.inventory_a.itervalues():
1348
if entry.id is None:
1350
cs_entry = self.make_entry(entry.id)
1351
if cs_entry is not None and not cs_entry.is_boring():
1352
cset.add_entry(cs_entry)
1354
for entry in self.inventory_b.itervalues():
1355
if entry.id is None:
1357
if not self.r_inventory_a.has_key(entry.id):
1358
cs_entry = self.make_entry(entry.id)
1359
if cs_entry is not None and not cs_entry.is_boring():
1360
cset.add_entry(cs_entry)
1361
for entry in list(cset.entries.itervalues()):
1362
if entry.parent != entry.new_parent:
1363
if not cset.entries.has_key(entry.parent) and\
1364
entry.parent != NULL_ID and entry.parent is not None:
1365
parent_entry = self.make_boring_entry(entry.parent)
1366
cset.add_entry(parent_entry)
1367
if not cset.entries.has_key(entry.new_parent) and\
1368
entry.new_parent != NULL_ID and \
1369
entry.new_parent is not None:
1370
parent_entry = self.make_boring_entry(entry.new_parent)
1371
cset.add_entry(parent_entry)
1374
def get_entry_parent(self, entry, inventory):
1377
if entry.path == "./.":
1379
dirname = os.path.dirname(entry.path)
1382
parent = inventory[dirname]
1385
def get_paths(self, entry, tree):
1388
full_path = tree.readonly_path(entry.id)
1389
if entry.path == ".":
1390
return ("", full_path)
1391
return (entry.path, full_path)
1393
def make_basic_entry(self, id, only_interesting):
1394
entry_a = self.r_inventory_a.get(id)
1395
entry_b = self.r_inventory_b.get(id)
1396
if only_interesting and not self.is_interesting(entry_a, entry_b):
1397
return (None, None, None)
1398
parent = self.get_entry_parent(entry_a, self.inventory_a)
1399
(path, full_path_a) = self.get_paths(entry_a, self.tree_a)
1400
cs_entry = ChangesetEntry(id, parent, path)
1401
new_parent = self.get_entry_parent(entry_b, self.inventory_b)
1404
(new_path, full_path_b) = self.get_paths(entry_b, self.tree_b)
1406
cs_entry.new_path = new_path
1407
cs_entry.new_parent = new_parent
1408
return (cs_entry, full_path_a, full_path_b)
1410
def is_interesting(self, entry_a, entry_b):
1411
if entry_a is not None:
1412
if entry_a.interesting:
1414
if entry_b is not None:
1415
if entry_b.interesting:
1419
def make_boring_entry(self, id):
1420
(cs_entry, full_path_a, full_path_b) = \
1421
self.make_basic_entry(id, only_interesting=False)
1422
if cs_entry.is_creation_or_deletion():
1423
return self.make_entry(id, only_interesting=False)
1428
def make_entry(self, id, only_interesting=True):
1429
(cs_entry, full_path_a, full_path_b) = \
1430
self.make_basic_entry(id, only_interesting)
1432
if cs_entry is None:
1435
stat_a = self.lstat(full_path_a)
1436
stat_b = self.lstat(full_path_b)
1438
cs_entry.new_parent = None
1439
cs_entry.new_path = None
1441
cs_entry.metadata_change = self.make_mode_change(stat_a, stat_b)
1442
cs_entry.contents_change = self.make_contents_change(full_path_a,
1448
def make_mode_change(self, stat_a, stat_b):
1450
if stat_a is not None and not stat.S_ISLNK(stat_a.st_mode):
1451
mode_a = stat_a.st_mode & 0777
1453
if stat_b is not None and not stat.S_ISLNK(stat_b.st_mode):
1454
mode_b = stat_b.st_mode & 0777
1455
if mode_a == mode_b:
1457
return ChangeUnixPermissions(mode_a, mode_b)
1459
def make_contents_change(self, full_path_a, stat_a, full_path_b, stat_b):
1460
if stat_a is None and stat_b is None:
1462
if None not in (stat_a, stat_b) and stat.S_ISDIR(stat_a.st_mode) and\
1463
stat.S_ISDIR(stat_b.st_mode):
1465
if None not in (stat_a, stat_b) and stat.S_ISREG(stat_a.st_mode) and\
1466
stat.S_ISREG(stat_b.st_mode):
1467
if stat_a.st_ino == stat_b.st_ino and \
1468
stat_a.st_dev == stat_b.st_dev:
1470
if file(full_path_a, "rb").read() == \
1471
file(full_path_b, "rb").read():
1474
patch_contents = patch.diff(full_path_a,
1475
file(full_path_b, "rb").read())
1476
if patch_contents is None:
1478
return PatchApply(patch_contents)
1480
a_contents = self.get_contents(stat_a, full_path_a)
1481
b_contents = self.get_contents(stat_b, full_path_b)
1482
if a_contents == b_contents:
1484
return ReplaceContents(a_contents, b_contents)
1486
def get_contents(self, stat_result, full_path):
1487
if stat_result is None:
1489
elif stat.S_ISREG(stat_result.st_mode):
1490
return FileCreate(file(full_path, "rb").read())
1491
elif stat.S_ISDIR(stat_result.st_mode):
1493
elif stat.S_ISLNK(stat_result.st_mode):
1494
return SymlinkCreate(os.readlink(full_path))
1496
raise UnsupportedFiletype(full_path, stat_result)
1498
def lstat(self, full_path):
1500
if full_path is not None:
1502
stat_result = os.lstat(full_path)
1504
if e.errno != errno.ENOENT:
1509
def full_path(entry, tree):
1510
return os.path.join(tree.root, entry.path)
1512
def new_delete_entry(entry, tree, inventory, delete):
1513
if entry.path == "":
1516
parent = inventory[dirname(entry.path)].id
1517
cs_entry = ChangesetEntry(parent, entry.path)
1519
cs_entry.new_path = None
1520
cs_entry.new_parent = None
1522
cs_entry.path = None
1523
cs_entry.parent = None
1524
full_path = full_path(entry, tree)
1525
status = os.lstat(full_path)
1526
if stat.S_ISDIR(file_stat.st_mode):
1532
# XXX: Can't we unify this with the regular inventory object
1533
class Inventory(object):
1534
def __init__(self, inventory):
1535
self.inventory = inventory
1536
self.rinventory = None
1538
def get_rinventory(self):
1539
if self.rinventory is None:
1540
self.rinventory = invert_dict(self.inventory)
1541
return self.rinventory
1543
def get_path(self, id):
1544
return self.inventory.get(id)
1546
def get_name(self, id):
1547
path = self.get_path(id)
1551
return os.path.basename(path)
1553
def get_dir(self, id):
1554
path = self.get_path(id)
1559
return os.path.dirname(path)
1561
def get_parent(self, id):
1562
if self.get_path(id) is None:
1564
directory = self.get_dir(id)
1565
if directory == '.':
1567
if directory is None:
1569
return self.get_rinventory().get(directory)
added
removed
bzrlib/changeset.py
