329
445
if e.errno != errno.ENOENT:
332
def do(self, action, tree):
333
"""Apply the specified action to the conflict.
335
:param action: The method name to call.
337
:param tree: The tree passed as a parameter to the method.
339
raise NotImplementedError(self.do)
342
"""Return a string description of this conflict."""
343
raise NotImplementedError(self.describe)
448
def action_done(self, tree):
449
"""Mark the conflict as solved once it has been handled."""
450
# This method does nothing but simplifies the design of upper levels.
453
def action_take_this(self, tree):
454
raise NotImplementedError(self.action_take_this)
456
def action_take_other(self, tree):
457
raise NotImplementedError(self.action_take_other)
459
def _resolve_with_cleanups(self, tree, *args, **kwargs):
460
tt = transform.TreeTransform(tree)
461
op = cleanup.OperationWithCleanups(self._resolve)
462
op.add_cleanup(tt.finalize)
463
op.run_simple(tt, *args, **kwargs)
466
class PathConflict(Conflict):
467
"""A conflict was encountered merging file paths"""
469
typestring = 'path conflict'
471
format = 'Path conflict: %(path)s / %(conflict_path)s'
473
rformat = '%(class)s(%(path)r, %(conflict_path)r, %(file_id)r)'
475
def __init__(self, path, conflict_path=None, file_id=None):
476
Conflict.__init__(self, path, file_id)
477
self.conflict_path = conflict_path
480
s = Conflict.as_stanza(self)
481
if self.conflict_path is not None:
482
s.add('conflict_path', self.conflict_path)
485
def associated_filenames(self):
486
# No additional files have been generated here
489
def _resolve(self, tt, file_id, path, winner):
490
"""Resolve the conflict.
492
:param tt: The TreeTransform where the conflict is resolved.
493
:param file_id: The retained file id.
494
:param path: The retained path.
495
:param winner: 'this' or 'other' indicates which side is the winner.
497
path_to_create = None
499
if self.path == '<deleted>':
500
return # Nothing to do
501
if self.conflict_path == '<deleted>':
502
path_to_create = self.path
503
revid = tt._tree.get_parent_ids()[0]
504
elif winner == 'other':
505
if self.conflict_path == '<deleted>':
506
return # Nothing to do
507
if self.path == '<deleted>':
508
path_to_create = self.conflict_path
509
# FIXME: If there are more than two parents we may need to
510
# iterate. Taking the last parent is the safer bet in the mean
511
# time. -- vila 20100309
512
revid = tt._tree.get_parent_ids()[-1]
515
raise AssertionError('bad winner: %r' % (winner,))
516
if path_to_create is not None:
517
tid = tt.trans_id_tree_path(path_to_create)
518
transform.create_from_tree(
519
tt, tid, self._revision_tree(tt._tree, revid), file_id)
520
tt.version_file(file_id, tid)
522
tid = tt.trans_id_file_id(file_id)
523
# Adjust the path for the retained file id
524
parent_tid = tt.get_tree_parent(tid)
525
tt.adjust_path(osutils.basename(path), parent_tid, tid)
528
def _revision_tree(self, tree, revid):
529
return tree.branch.repository.revision_tree(revid)
531
def _infer_file_id(self, tree):
532
# Prior to bug #531967, file_id wasn't always set, there may still be
533
# conflict files in the wild so we need to cope with them
534
# Establish which path we should use to find back the file-id
536
for p in (self.path, self.conflict_path):
538
# special hard-coded path
541
possible_paths.append(p)
542
# Search the file-id in the parents with any path available
544
for revid in tree.get_parent_ids():
545
revtree = self._revision_tree(tree, revid)
546
for p in possible_paths:
547
file_id = revtree.path2id(p)
548
if file_id is not None:
549
return revtree, file_id
552
def action_take_this(self, tree):
553
if self.file_id is not None:
554
self._resolve_with_cleanups(tree, self.file_id, self.path,
557
# Prior to bug #531967 we need to find back the file_id and restore
558
# the content from there
559
revtree, file_id = self._infer_file_id(tree)
560
tree.revert([revtree.id2path(file_id)],
561
old_tree=revtree, backups=False)
563
def action_take_other(self, tree):
564
if self.file_id is not None:
565
self._resolve_with_cleanups(tree, self.file_id,
569
# Prior to bug #531967 we need to find back the file_id and restore
570
# the content from there
571
revtree, file_id = self._infer_file_id(tree)
572
tree.revert([revtree.id2path(file_id)],
573
old_tree=revtree, backups=False)
576
class ContentsConflict(PathConflict):
577
"""The files are of different types (or both binary), or not present"""
581
typestring = 'contents conflict'
583
format = 'Contents conflict in %(path)s'
585
def associated_filenames(self):
586
return [self.path + suffix for suffix in ('.BASE', '.OTHER')]
588
def _resolve(self, tt, suffix_to_remove):
589
"""Resolve the conflict.
591
:param tt: The TreeTransform where the conflict is resolved.
592
:param suffix_to_remove: Either 'THIS' or 'OTHER'
594
The resolution is symmetric: when taking THIS, OTHER is deleted and
595
item.THIS is renamed into item and vice-versa.
598
# Delete 'item.THIS' or 'item.OTHER' depending on
601
tt.trans_id_tree_path(self.path + '.' + suffix_to_remove))
602
except errors.NoSuchFile:
603
# There are valid cases where 'item.suffix_to_remove' either
604
# never existed or was already deleted (including the case
605
# where the user deleted it)
608
this_path = tt._tree.id2path(self.file_id)
609
except errors.NoSuchId:
610
# The file is not present anymore. This may happen if the user
611
# deleted the file either manually or when resolving a conflict on
612
# the parent. We may raise some exception to indicate that the
613
# conflict doesn't exist anymore and as such doesn't need to be
614
# resolved ? -- vila 20110615
617
this_tid = tt.trans_id_tree_path(this_path)
618
if this_tid is not None:
619
# Rename 'item.suffix_to_remove' (note that if
620
# 'item.suffix_to_remove' has been deleted, this is a no-op)
621
parent_tid = tt.get_tree_parent(this_tid)
622
tt.adjust_path(osutils.basename(self.path), parent_tid, this_tid)
625
def action_take_this(self, tree):
626
self._resolve_with_cleanups(tree, 'OTHER')
628
def action_take_other(self, tree):
629
self._resolve_with_cleanups(tree, 'THIS')
632
# TODO: There should be a base revid attribute to better inform the user about
633
# how the conflicts were generated.
634
class TextConflict(Conflict):
635
"""The merge algorithm could not resolve all differences encountered."""
639
typestring = 'text conflict'
641
format = 'Text conflict in %(path)s'
643
rformat = '%(class)s(%(path)r, %(file_id)r)'
645
def associated_filenames(self):
646
return [self.path + suffix for suffix in CONFLICT_SUFFIXES]
648
def _resolve(self, tt, winner_suffix):
649
"""Resolve the conflict by copying one of .THIS or .OTHER into file.
651
:param tt: The TreeTransform where the conflict is resolved.
652
:param winner_suffix: Either 'THIS' or 'OTHER'
654
The resolution is symmetric, when taking THIS, item.THIS is renamed
655
into item and vice-versa. This takes one of the files as a whole
656
ignoring every difference that could have been merged cleanly.
658
# To avoid useless copies, we switch item and item.winner_suffix, only
659
# item will exist after the conflict has been resolved anyway.
660
item_tid = tt.trans_id_file_id(self.file_id)
661
item_parent_tid = tt.get_tree_parent(item_tid)
662
winner_path = self.path + '.' + winner_suffix
663
winner_tid = tt.trans_id_tree_path(winner_path)
664
winner_parent_tid = tt.get_tree_parent(winner_tid)
665
# Switch the paths to preserve the content
666
tt.adjust_path(osutils.basename(self.path),
667
winner_parent_tid, winner_tid)
668
tt.adjust_path(osutils.basename(winner_path), item_parent_tid, item_tid)
669
# Associate the file_id to the right content
670
tt.unversion_file(item_tid)
671
tt.version_file(self.file_id, winner_tid)
674
def action_take_this(self, tree):
675
self._resolve_with_cleanups(tree, 'THIS')
677
def action_take_other(self, tree):
678
self._resolve_with_cleanups(tree, 'OTHER')
681
class HandledConflict(Conflict):
682
"""A path problem that has been provisionally resolved.
683
This is intended to be a base class.
686
rformat = "%(class)s(%(action)r, %(path)r, %(file_id)r)"
688
def __init__(self, action, path, file_id=None):
689
Conflict.__init__(self, path, file_id)
693
return Conflict._cmp_list(self) + [self.action]
696
s = Conflict.as_stanza(self)
697
s.add('action', self.action)
700
def associated_filenames(self):
701
# Nothing has been generated here
705
class HandledPathConflict(HandledConflict):
706
"""A provisionally-resolved path problem involving two paths.
707
This is intended to be a base class.
710
rformat = "%(class)s(%(action)r, %(path)r, %(conflict_path)r,"\
711
" %(file_id)r, %(conflict_file_id)r)"
713
def __init__(self, action, path, conflict_path, file_id=None,
714
conflict_file_id=None):
715
HandledConflict.__init__(self, action, path, file_id)
716
self.conflict_path = conflict_path
717
# the factory blindly transfers the Stanza values to __init__,
718
# so they can be unicode.
719
if isinstance(conflict_file_id, unicode):
720
conflict_file_id = cache_utf8.encode(conflict_file_id)
721
self.conflict_file_id = osutils.safe_file_id(conflict_file_id)
724
return HandledConflict._cmp_list(self) + [self.conflict_path,
725
self.conflict_file_id]
728
s = HandledConflict.as_stanza(self)
729
s.add('conflict_path', self.conflict_path)
730
if self.conflict_file_id is not None:
731
s.add('conflict_file_id', self.conflict_file_id.decode('utf8'))
736
class DuplicateID(HandledPathConflict):
737
"""Two files want the same file_id."""
739
typestring = 'duplicate id'
741
format = 'Conflict adding id to %(conflict_path)s. %(action)s %(path)s.'
744
class DuplicateEntry(HandledPathConflict):
745
"""Two directory entries want to have the same name."""
747
typestring = 'duplicate'
749
format = 'Conflict adding file %(conflict_path)s. %(action)s %(path)s.'
751
def action_take_this(self, tree):
752
tree.remove([self.conflict_path], force=True, keep_files=False)
753
tree.rename_one(self.path, self.conflict_path)
755
def action_take_other(self, tree):
756
tree.remove([self.path], force=True, keep_files=False)
759
class ParentLoop(HandledPathConflict):
760
"""An attempt to create an infinitely-looping directory structure.
761
This is rare, but can be produced like so:
770
typestring = 'parent loop'
772
format = 'Conflict moving %(path)s into %(conflict_path)s. %(action)s.'
774
def action_take_this(self, tree):
775
# just acccept brz proposal
778
def action_take_other(self, tree):
779
tt = transform.TreeTransform(tree)
781
p_tid = tt.trans_id_file_id(self.file_id)
782
parent_tid = tt.get_tree_parent(p_tid)
783
cp_tid = tt.trans_id_file_id(self.conflict_file_id)
784
cparent_tid = tt.get_tree_parent(cp_tid)
785
tt.adjust_path(osutils.basename(self.path), cparent_tid, cp_tid)
786
tt.adjust_path(osutils.basename(self.conflict_path),
793
class UnversionedParent(HandledConflict):
794
"""An attempt to version a file whose parent directory is not versioned.
795
Typically, the result of a merge where one tree unversioned the directory
796
and the other added a versioned file to it.
799
typestring = 'unversioned parent'
801
format = 'Conflict because %(path)s is not versioned, but has versioned'\
802
' children. %(action)s.'
804
# FIXME: We silently do nothing to make tests pass, but most probably the
805
# conflict shouldn't exist (the long story is that the conflict is
806
# generated with another one that can be resolved properly) -- vila 091224
807
def action_take_this(self, tree):
810
def action_take_other(self, tree):
814
class MissingParent(HandledConflict):
815
"""An attempt to add files to a directory that is not present.
816
Typically, the result of a merge where THIS deleted the directory and
817
the OTHER added a file to it.
818
See also: DeletingParent (same situation, THIS and OTHER reversed)
821
typestring = 'missing parent'
823
format = 'Conflict adding files to %(path)s. %(action)s.'
825
def action_take_this(self, tree):
826
tree.remove([self.path], force=True, keep_files=False)
828
def action_take_other(self, tree):
829
# just acccept brz proposal
833
class DeletingParent(HandledConflict):
834
"""An attempt to add files to a directory that is not present.
835
Typically, the result of a merge where one OTHER deleted the directory and
836
the THIS added a file to it.
839
typestring = 'deleting parent'
841
format = "Conflict: can't delete %(path)s because it is not empty. "\
844
# FIXME: It's a bit strange that the default action is not coherent with
845
# MissingParent from the *user* pov.
847
def action_take_this(self, tree):
848
# just acccept brz proposal
851
def action_take_other(self, tree):
852
tree.remove([self.path], force=True, keep_files=False)
855
class NonDirectoryParent(HandledConflict):
856
"""An attempt to add files to a directory that is not a directory or
857
an attempt to change the kind of a directory with files.
860
typestring = 'non-directory parent'
862
format = "Conflict: %(path)s is not a directory, but has files in it."\
865
# FIXME: .OTHER should be used instead of .new when the conflict is created
867
def action_take_this(self, tree):
868
# FIXME: we should preserve that path when the conflict is generated !
869
if self.path.endswith('.new'):
870
conflict_path = self.path[:-(len('.new'))]
871
tree.remove([self.path], force=True, keep_files=False)
872
tree.add(conflict_path)
874
raise NotImplementedError(self.action_take_this)
876
def action_take_other(self, tree):
877
# FIXME: we should preserve that path when the conflict is generated !
878
if self.path.endswith('.new'):
879
conflict_path = self.path[:-(len('.new'))]
880
tree.remove([conflict_path], force=True, keep_files=False)
881
tree.rename_one(self.path, conflict_path)
883
raise NotImplementedError(self.action_take_other)
889
def register_types(*conflict_types):
890
"""Register a Conflict subclass for serialization purposes"""
892
for conflict_type in conflict_types:
893
ctype[conflict_type.typestring] = conflict_type
895
register_types(ContentsConflict, TextConflict, PathConflict, DuplicateID,
896
DuplicateEntry, ParentLoop, UnversionedParent, MissingParent,
897
DeletingParent, NonDirectoryParent)