1
# Copyright (C) 2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20
from shutil import rmtree
21
from tempfile import mkdtemp
24
from bzrlib.branch import Branch
25
from bzrlib.conflicts import ConflictList, Conflict
26
from bzrlib.delta import compare_trees
27
from bzrlib.errors import (BzrCommandError,
37
WorkingTreeNotRevision,
39
from bzrlib.merge3 import Merge3
41
from bzrlib.osutils import rename, pathjoin
42
from progress import DummyProgress, ProgressPhase
43
from bzrlib.revision import common_ancestor, is_ancestor, NULL_REVISION
44
from bzrlib.symbol_versioning import *
45
from bzrlib.trace import mutter, warning, note
46
from bzrlib.transform import (TreeTransform, resolve_conflicts, cook_conflicts,
47
FinalPaths, create_by_entry, unique_add)
50
# TODO: Report back as changes are merged in
52
def _get_tree(treespec, local_branch=None):
53
location, revno = treespec
54
branch = Branch.open_containing(location)[0]
58
revision = branch.last_revision()
60
revision = branch.get_rev_id(revno)
62
revision = NULL_REVISION
63
return branch, _get_revid_tree(branch, revision, local_branch)
66
def _get_revid_tree(branch, revision, local_branch):
68
base_tree = branch.bzrdir.open_workingtree()
70
if local_branch is not None:
71
if local_branch.base != branch.base:
72
local_branch.fetch(branch, revision)
73
base_tree = local_branch.repository.revision_tree(revision)
75
base_tree = branch.repository.revision_tree(revision)
79
def transform_tree(from_tree, to_tree, interesting_ids=None):
80
merge_inner(from_tree.branch, to_tree, from_tree, ignore_zero=True,
81
interesting_ids=interesting_ids, this_tree=from_tree)
85
def __init__(self, this_branch, other_tree=None, base_tree=None,
86
this_tree=None, pb=DummyProgress()):
88
assert this_tree is not None, "this_tree is required"
89
self.this_branch = this_branch
90
self.this_basis = this_branch.last_revision()
91
self.this_rev_id = None
92
self.this_tree = this_tree
93
self.this_revision_tree = None
94
self.this_basis_tree = None
95
self.other_tree = other_tree
96
self.base_tree = base_tree
97
self.ignore_zero = False
98
self.backup_files = False
99
self.interesting_ids = None
100
self.show_base = False
101
self.reprocess = False
106
def revision_tree(self, revision_id):
107
return self.this_branch.repository.revision_tree(revision_id)
109
def ensure_revision_trees(self):
110
if self.this_revision_tree is None:
111
self.this_basis_tree = self.this_branch.repository.revision_tree(
113
if self.this_basis == self.this_rev_id:
114
self.this_revision_tree = self.this_basis_tree
116
if self.other_rev_id is None:
117
other_basis_tree = self.revision_tree(self.other_basis)
118
changes = compare_trees(self.other_tree, other_basis_tree)
119
if changes.has_changed():
120
raise WorkingTreeNotRevision(self.this_tree)
121
other_rev_id = other_basis
122
self.other_tree = other_basis_tree
124
def file_revisions(self, file_id):
125
self.ensure_revision_trees()
126
def get_id(tree, file_id):
127
revision_id = tree.inventory[file_id].revision
128
assert revision_id is not None
130
if self.this_rev_id is None:
131
if self.this_basis_tree.get_file_sha1(file_id) != \
132
self.this_tree.get_file_sha1(file_id):
133
raise WorkingTreeNotRevision(self.this_tree)
135
trees = (self.this_basis_tree, self.other_tree)
136
return [get_id(tree, file_id) for tree in trees]
138
def check_basis(self, check_clean):
139
if self.this_basis is None:
140
raise BzrCommandError("This branch has no commits")
143
if self.this_basis != self.this_rev_id:
144
raise BzrCommandError("Working tree has uncommitted changes.")
146
def compare_basis(self):
147
changes = compare_trees(self.this_tree,
148
self.this_tree.basis_tree(), False)
149
if not changes.has_changed():
150
self.this_rev_id = self.this_basis
152
def set_interesting_files(self, file_list):
154
self._set_interesting_files(file_list)
155
except NotVersionedError, e:
156
raise BzrCommandError("%s is not a source file in any"
159
def _set_interesting_files(self, file_list):
160
"""Set the list of interesting ids from a list of files."""
161
if file_list is None:
162
self.interesting_ids = None
165
interesting_ids = set()
166
for path in file_list:
168
for tree in (self.this_tree, self.base_tree, self.other_tree):
169
file_id = tree.inventory.path2id(path)
170
if file_id is not None:
171
interesting_ids.add(file_id)
174
raise NotVersionedError(path=path)
175
self.interesting_ids = interesting_ids
177
def set_pending(self):
178
if not self.base_is_ancestor:
180
if self.other_rev_id is None:
182
ancestry = self.this_branch.repository.get_ancestry(self.this_basis)
183
if self.other_rev_id in ancestry:
185
self.this_tree.add_pending_merge(self.other_rev_id)
187
def set_other(self, other_revision):
188
other_branch, self.other_tree = _get_tree(other_revision,
190
if other_revision[1] == -1:
191
self.other_rev_id = other_branch.last_revision()
192
if self.other_rev_id is None:
193
raise NoCommits(other_branch)
194
self.other_basis = self.other_rev_id
195
elif other_revision[1] is not None:
196
self.other_rev_id = other_branch.get_rev_id(other_revision[1])
197
self.other_basis = self.other_rev_id
199
self.other_rev_id = None
200
self.other_basis = other_branch.last_revision()
201
if self.other_basis is None:
202
raise NoCommits(other_branch)
203
if other_branch.base != self.this_branch.base:
204
self.this_branch.fetch(other_branch, last_revision=self.other_basis)
206
def set_base(self, base_revision):
207
mutter("doing merge() with no base_revision specified")
208
if base_revision == [None, None]:
210
pb = bzrlib.ui.ui_factory.nested_progress_bar()
212
this_repo = self.this_branch.repository
213
self.base_rev_id = common_ancestor(self.this_basis,
218
except NoCommonAncestor:
219
raise UnrelatedBranches()
220
self.base_tree = _get_revid_tree(self.this_branch, self.base_rev_id,
222
self.base_is_ancestor = True
224
base_branch, self.base_tree = _get_tree(base_revision)
225
if base_revision[1] == -1:
226
self.base_rev_id = base_branch.last_revision()
227
elif base_revision[1] is None:
228
self.base_rev_id = None
230
self.base_rev_id = base_branch.get_rev_id(base_revision[1])
231
if self.this_branch.base != base_branch.base:
232
self.this_branch.fetch(base_branch)
233
self.base_is_ancestor = is_ancestor(self.this_basis,
238
kwargs = {'working_tree':self.this_tree, 'this_tree': self.this_tree,
239
'other_tree': self.other_tree,
240
'interesting_ids': self.interesting_ids,
242
if self.merge_type.requires_base:
243
kwargs['base_tree'] = self.base_tree
244
if self.merge_type.supports_reprocess:
245
kwargs['reprocess'] = self.reprocess
247
raise BzrError("Reprocess is not supported for this merge"
248
" type. %s" % merge_type)
249
if self.merge_type.supports_show_base:
250
kwargs['show_base'] = self.show_base
252
raise BzrError("Showing base is not supported for this"
253
" merge type. %s" % self.merge_type)
254
merge = self.merge_type(pb=self._pb, **kwargs)
255
if len(merge.cooked_conflicts) == 0:
256
if not self.ignore_zero:
257
note("All changes applied successfully.")
259
note("%d conflicts encountered." % len(merge.cooked_conflicts))
261
return len(merge.cooked_conflicts)
263
def regen_inventory(self, new_entries):
264
old_entries = self.this_tree.read_working_inventory()
268
for path, file_id in new_entries:
271
new_entries_map[file_id] = path
273
def id2path(file_id):
274
path = new_entries_map.get(file_id)
277
entry = old_entries[file_id]
278
if entry.parent_id is None:
280
return pathjoin(id2path(entry.parent_id), entry.name)
282
for file_id in old_entries:
283
entry = old_entries[file_id]
284
path = id2path(file_id)
285
if file_id in self.base_tree.inventory:
286
executable = getattr(self.base_tree.inventory[file_id], 'executable', False)
288
executable = getattr(entry, 'executable', False)
289
new_inventory[file_id] = (path, file_id, entry.parent_id,
290
entry.kind, executable)
292
by_path[path] = file_id
297
for path, file_id in new_entries:
299
del new_inventory[file_id]
302
new_path_list.append((path, file_id))
303
if file_id not in old_entries:
305
# Ensure no file is added before its parent
307
for path, file_id in new_path_list:
311
parent = by_path[os.path.dirname(path)]
312
abspath = pathjoin(self.this_tree.basedir, path)
313
kind = bzrlib.osutils.file_kind(abspath)
314
if file_id in self.base_tree.inventory:
315
executable = getattr(self.base_tree.inventory[file_id], 'executable', False)
318
new_inventory[file_id] = (path, file_id, parent, kind, executable)
319
by_path[path] = file_id
321
# Get a list in insertion order
322
new_inventory_list = new_inventory.values()
323
mutter ("""Inventory regeneration:
324
old length: %i insertions: %i deletions: %i new_length: %i"""\
325
% (len(old_entries), insertions, deletions,
326
len(new_inventory_list)))
327
assert len(new_inventory_list) == len(old_entries) + insertions\
329
new_inventory_list.sort()
330
return new_inventory_list
333
class Merge3Merger(object):
334
"""Three-way merger that uses the merge3 text merger"""
336
supports_reprocess = True
337
supports_show_base = True
338
history_based = False
340
def __init__(self, working_tree, this_tree, base_tree, other_tree,
341
interesting_ids=None, reprocess=False, show_base=False,
342
pb=DummyProgress(), pp=None):
343
"""Initialize the merger object and perform the merge."""
344
object.__init__(self)
345
self.this_tree = working_tree
346
self.base_tree = base_tree
347
self.other_tree = other_tree
348
self._raw_conflicts = []
349
self.cooked_conflicts = []
350
self.reprocess = reprocess
351
self.show_base = show_base
355
self.pp = ProgressPhase("Merge phase", 3, self.pb)
357
if interesting_ids is not None:
358
all_ids = interesting_ids
360
all_ids = set(base_tree)
361
all_ids.update(other_tree)
362
working_tree.lock_write()
363
self.tt = TreeTransform(working_tree, self.pb)
366
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
368
for num, file_id in enumerate(all_ids):
369
child_pb.update('Preparing file merge', num, len(all_ids))
370
self.merge_names(file_id)
371
file_status = self.merge_contents(file_id)
372
self.merge_executable(file_id, file_status)
377
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
379
fs_conflicts = resolve_conflicts(self.tt, child_pb)
382
self.cook_conflicts(fs_conflicts)
383
for conflict in self.cooked_conflicts:
386
results = self.tt.apply()
387
self.write_modified(results)
389
working_tree.set_conflicts(ConflictList(self.cooked_conflicts))
390
except UnsupportedOperation:
397
working_tree.unlock()
400
def write_modified(self, results):
402
for path in results.modified_paths:
403
file_id = self.this_tree.path2id(self.this_tree.relpath(path))
406
hash = self.this_tree.get_file_sha1(file_id)
409
modified_hashes[file_id] = hash
410
self.this_tree.set_merge_modified(modified_hashes)
413
def parent(entry, file_id):
414
"""Determine the parent for a file_id (used as a key method)"""
417
return entry.parent_id
420
def name(entry, file_id):
421
"""Determine the name for a file_id (used as a key method)"""
427
def contents_sha1(tree, file_id):
428
"""Determine the sha1 of the file contents (used as a key method)."""
429
if file_id not in tree:
431
return tree.get_file_sha1(file_id)
434
def executable(tree, file_id):
435
"""Determine the executability of a file-id (used as a key method)."""
436
if file_id not in tree:
438
if tree.kind(file_id) != "file":
440
return tree.is_executable(file_id)
443
def kind(tree, file_id):
444
"""Determine the kind of a file-id (used as a key method)."""
445
if file_id not in tree:
447
return tree.kind(file_id)
450
def scalar_three_way(this_tree, base_tree, other_tree, file_id, key):
451
"""Do a three-way test on a scalar.
452
Return "this", "other" or "conflict", depending whether a value wins.
454
key_base = key(base_tree, file_id)
455
key_other = key(other_tree, file_id)
456
#if base == other, either they all agree, or only THIS has changed.
457
if key_base == key_other:
459
key_this = key(this_tree, file_id)
460
if key_this not in (key_base, key_other):
462
# "Ambiguous clean merge"
463
elif key_this == key_other:
466
assert key_this == key_base
469
def merge_names(self, file_id):
470
"""Perform a merge on file_id names and parents"""
472
if file_id in tree.inventory:
473
return tree.inventory[file_id]
476
this_entry = get_entry(self.this_tree)
477
other_entry = get_entry(self.other_tree)
478
base_entry = get_entry(self.base_tree)
479
name_winner = self.scalar_three_way(this_entry, base_entry,
480
other_entry, file_id, self.name)
481
parent_id_winner = self.scalar_three_way(this_entry, base_entry,
482
other_entry, file_id,
484
if this_entry is None:
485
if name_winner == "this":
486
name_winner = "other"
487
if parent_id_winner == "this":
488
parent_id_winner = "other"
489
if name_winner == "this" and parent_id_winner == "this":
491
if name_winner == "conflict":
492
trans_id = self.tt.trans_id_file_id(file_id)
493
self._raw_conflicts.append(('name conflict', trans_id,
494
self.name(this_entry, file_id),
495
self.name(other_entry, file_id)))
496
if parent_id_winner == "conflict":
497
trans_id = self.tt.trans_id_file_id(file_id)
498
self._raw_conflicts.append(('parent conflict', trans_id,
499
self.parent(this_entry, file_id),
500
self.parent(other_entry, file_id)))
501
if other_entry is None:
502
# it doesn't matter whether the result was 'other' or
503
# 'conflict'-- if there's no 'other', we leave it alone.
505
# if we get here, name_winner and parent_winner are set to safe values.
506
winner_entry = {"this": this_entry, "other": other_entry,
507
"conflict": other_entry}
508
trans_id = self.tt.trans_id_file_id(file_id)
509
parent_id = winner_entry[parent_id_winner].parent_id
510
parent_trans_id = self.tt.trans_id_file_id(parent_id)
511
self.tt.adjust_path(winner_entry[name_winner].name, parent_trans_id,
514
def merge_contents(self, file_id):
515
"""Performa a merge on file_id contents."""
516
def contents_pair(tree):
517
if file_id not in tree:
519
kind = tree.kind(file_id)
520
if kind == "root_directory":
523
contents = tree.get_file_sha1(file_id)
524
elif kind == "symlink":
525
contents = tree.get_symlink_target(file_id)
528
return kind, contents
529
# See SPOT run. run, SPOT, run.
530
# So we're not QUITE repeating ourselves; we do tricky things with
532
base_pair = contents_pair(self.base_tree)
533
other_pair = contents_pair(self.other_tree)
534
if base_pair == other_pair:
535
# OTHER introduced no changes
537
this_pair = contents_pair(self.this_tree)
538
if this_pair == other_pair:
539
# THIS and OTHER introduced the same changes
542
trans_id = self.tt.trans_id_file_id(file_id)
543
if this_pair == base_pair:
544
# only OTHER introduced changes
545
if file_id in self.this_tree:
546
# Remove any existing contents
547
self.tt.delete_contents(trans_id)
548
if file_id in self.other_tree:
549
# OTHER changed the file
550
create_by_entry(self.tt,
551
self.other_tree.inventory[file_id],
552
self.other_tree, trans_id)
553
if file_id not in self.this_tree.inventory:
554
self.tt.version_file(file_id, trans_id)
556
elif file_id in self.this_tree.inventory:
557
# OTHER deleted the file
558
self.tt.unversion_file(trans_id)
560
#BOTH THIS and OTHER introduced changes; scalar conflict
561
elif this_pair[0] == "file" and other_pair[0] == "file":
562
# THIS and OTHER are both files, so text merge. Either
563
# BASE is a file, or both converted to files, so at least we
564
# have agreement that output should be a file.
565
if file_id not in self.this_tree.inventory:
566
self.tt.version_file(file_id, trans_id)
567
self.text_merge(file_id, trans_id)
569
self.tt.tree_kind(trans_id)
570
self.tt.delete_contents(trans_id)
575
# Scalar conflict, can't text merge. Dump conflicts
576
trans_id = self.tt.trans_id_file_id(file_id)
577
name = self.tt.final_name(trans_id)
578
parent_id = self.tt.final_parent(trans_id)
579
if file_id in self.this_tree.inventory:
580
self.tt.unversion_file(trans_id)
581
self.tt.delete_contents(trans_id)
582
file_group = self._dump_conflicts(name, parent_id, file_id,
584
self._raw_conflicts.append(('contents conflict', file_group))
586
def get_lines(self, tree, file_id):
587
"""Return the lines in a file, or an empty list."""
589
return tree.get_file(file_id).readlines()
593
def text_merge(self, file_id, trans_id):
594
"""Perform a three-way text merge on a file_id"""
595
# it's possible that we got here with base as a different type.
596
# if so, we just want two-way text conflicts.
597
if file_id in self.base_tree and \
598
self.base_tree.kind(file_id) == "file":
599
base_lines = self.get_lines(self.base_tree, file_id)
602
other_lines = self.get_lines(self.other_tree, file_id)
603
this_lines = self.get_lines(self.this_tree, file_id)
604
m3 = Merge3(base_lines, this_lines, other_lines)
605
start_marker = "!START OF MERGE CONFLICT!" + "I HOPE THIS IS UNIQUE"
606
if self.show_base is True:
607
base_marker = '|' * 7
611
def iter_merge3(retval):
612
retval["text_conflicts"] = False
613
for line in m3.merge_lines(name_a = "TREE",
614
name_b = "MERGE-SOURCE",
615
name_base = "BASE-REVISION",
616
start_marker=start_marker,
617
base_marker=base_marker,
618
reprocess=self.reprocess):
619
if line.startswith(start_marker):
620
retval["text_conflicts"] = True
621
yield line.replace(start_marker, '<' * 7)
625
merge3_iterator = iter_merge3(retval)
626
self.tt.create_file(merge3_iterator, trans_id)
627
if retval["text_conflicts"] is True:
628
self._raw_conflicts.append(('text conflict', trans_id))
629
name = self.tt.final_name(trans_id)
630
parent_id = self.tt.final_parent(trans_id)
631
file_group = self._dump_conflicts(name, parent_id, file_id,
632
this_lines, base_lines,
634
file_group.append(trans_id)
636
def _dump_conflicts(self, name, parent_id, file_id, this_lines=None,
637
base_lines=None, other_lines=None, set_version=False,
639
"""Emit conflict files.
640
If this_lines, base_lines, or other_lines are omitted, they will be
641
determined automatically. If set_version is true, the .OTHER, .THIS
642
or .BASE (in that order) will be created as versioned files.
644
data = [('OTHER', self.other_tree, other_lines),
645
('THIS', self.this_tree, this_lines)]
647
data.append(('BASE', self.base_tree, base_lines))
650
for suffix, tree, lines in data:
652
trans_id = self._conflict_file(name, parent_id, tree, file_id,
654
file_group.append(trans_id)
655
if set_version and not versioned:
656
self.tt.version_file(file_id, trans_id)
660
def _conflict_file(self, name, parent_id, tree, file_id, suffix,
662
"""Emit a single conflict file."""
663
name = name + '.' + suffix
664
trans_id = self.tt.create_path(name, parent_id)
665
entry = tree.inventory[file_id]
666
create_by_entry(self.tt, entry, tree, trans_id, lines)
669
def merge_executable(self, file_id, file_status):
670
"""Perform a merge on the execute bit."""
671
if file_status == "deleted":
673
trans_id = self.tt.trans_id_file_id(file_id)
675
if self.tt.final_kind(trans_id) != "file":
679
winner = self.scalar_three_way(self.this_tree, self.base_tree,
680
self.other_tree, file_id,
682
if winner == "conflict":
683
# There must be a None in here, if we have a conflict, but we
684
# need executability since file status was not deleted.
685
if self.other_tree.is_executable(file_id) is None:
690
if file_status == "modified":
691
executability = self.this_tree.is_executable(file_id)
692
if executability is not None:
693
trans_id = self.tt.trans_id_file_id(file_id)
694
self.tt.set_executability(executability, trans_id)
696
assert winner == "other"
697
if file_id in self.other_tree:
698
executability = self.other_tree.is_executable(file_id)
699
elif file_id in self.this_tree:
700
executability = self.this_tree.is_executable(file_id)
701
elif file_id in self.base_tree:
702
executability = self.base_tree.is_executable(file_id)
703
if executability is not None:
704
trans_id = self.tt.trans_id_file_id(file_id)
705
self.tt.set_executability(executability, trans_id)
707
def cook_conflicts(self, fs_conflicts):
708
"""Convert all conflicts into a form that doesn't depend on trans_id"""
709
from conflicts import Conflict
711
self.cooked_conflicts.extend(cook_conflicts(fs_conflicts, self.tt))
712
fp = FinalPaths(self.tt)
713
for conflict in self._raw_conflicts:
714
conflict_type = conflict[0]
715
if conflict_type in ('name conflict', 'parent conflict'):
716
trans_id = conflict[1]
717
conflict_args = conflict[2:]
718
if trans_id not in name_conflicts:
719
name_conflicts[trans_id] = {}
720
unique_add(name_conflicts[trans_id], conflict_type,
722
if conflict_type == 'contents conflict':
723
for trans_id in conflict[1]:
724
file_id = self.tt.final_file_id(trans_id)
725
if file_id is not None:
727
path = fp.get_path(trans_id)
728
for suffix in ('.BASE', '.THIS', '.OTHER'):
729
if path.endswith(suffix):
730
path = path[:-len(suffix)]
732
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
733
self.cooked_conflicts.append(c)
734
if conflict_type == 'text conflict':
735
trans_id = conflict[1]
736
path = fp.get_path(trans_id)
737
file_id = self.tt.final_file_id(trans_id)
738
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
739
self.cooked_conflicts.append(c)
741
for trans_id, conflicts in name_conflicts.iteritems():
743
this_parent, other_parent = conflicts['parent conflict']
744
assert this_parent != other_parent
746
this_parent = other_parent = \
747
self.tt.final_file_id(self.tt.final_parent(trans_id))
749
this_name, other_name = conflicts['name conflict']
750
assert this_name != other_name
752
this_name = other_name = self.tt.final_name(trans_id)
753
other_path = fp.get_path(trans_id)
754
if this_parent is not None:
756
fp.get_path(self.tt.trans_id_file_id(this_parent))
757
this_path = pathjoin(this_parent_path, this_name)
759
this_path = "<deleted>"
760
file_id = self.tt.final_file_id(trans_id)
761
c = Conflict.factory('path conflict', path=this_path,
762
conflict_path=other_path, file_id=file_id)
763
self.cooked_conflicts.append(c)
764
self.cooked_conflicts.sort(key=Conflict.sort_key)
767
class WeaveMerger(Merge3Merger):
768
"""Three-way tree merger, text weave merger."""
769
supports_reprocess = False
770
supports_show_base = False
772
def __init__(self, working_tree, this_tree, base_tree, other_tree,
773
interesting_ids=None, pb=DummyProgress(), pp=None):
774
self.this_revision_tree = self._get_revision_tree(this_tree)
775
self.other_revision_tree = self._get_revision_tree(other_tree)
776
super(WeaveMerger, self).__init__(working_tree, this_tree,
777
base_tree, other_tree,
778
interesting_ids=interesting_ids,
781
def _get_revision_tree(self, tree):
782
"""Return a revision tree releated to this tree.
783
If the tree is a WorkingTree, the basis will be returned.
785
if getattr(tree, 'get_weave', False) is False:
786
# If we have a WorkingTree, try using the basis
787
return tree.branch.basis_tree()
791
def _check_file(self, file_id):
792
"""Check that the revision tree's version of the file matches."""
793
for tree, rt in ((self.this_tree, self.this_revision_tree),
794
(self.other_tree, self.other_revision_tree)):
797
if tree.get_file_sha1(file_id) != rt.get_file_sha1(file_id):
798
raise WorkingTreeNotRevision(self.this_tree)
800
def _merged_lines(self, file_id):
801
"""Generate the merged lines.
802
There is no distinction between lines that are meant to contain <<<<<<<
805
weave = self.this_revision_tree.get_weave(file_id)
806
this_revision_id = self.this_revision_tree.inventory[file_id].revision
807
other_revision_id = \
808
self.other_revision_tree.inventory[file_id].revision
809
plan = weave.plan_merge(this_revision_id, other_revision_id)
810
return weave.weave_merge(plan, '<<<<<<< TREE\n',
811
'>>>>>>> MERGE-SOURCE\n')
813
def text_merge(self, file_id, trans_id):
814
"""Perform a (weave) text merge for a given file and file-id.
815
If conflicts are encountered, .THIS and .OTHER files will be emitted,
816
and a conflict will be noted.
818
self._check_file(file_id)
819
lines = list(self._merged_lines(file_id))
820
conflicts = '<<<<<<< TREE\n' in lines
821
self.tt.create_file(lines, trans_id)
823
self._raw_conflicts.append(('text conflict', trans_id))
824
name = self.tt.final_name(trans_id)
825
parent_id = self.tt.final_parent(trans_id)
826
file_group = self._dump_conflicts(name, parent_id, file_id,
828
file_group.append(trans_id)
831
class Diff3Merger(Merge3Merger):
832
"""Three-way merger using external diff3 for text merging"""
833
def dump_file(self, temp_dir, name, tree, file_id):
834
out_path = pathjoin(temp_dir, name)
835
out_file = file(out_path, "wb")
836
in_file = tree.get_file(file_id)
841
def text_merge(self, file_id, trans_id):
842
"""Perform a diff3 merge using a specified file-id and trans-id.
843
If conflicts are encountered, .BASE, .THIS. and .OTHER conflict files
844
will be dumped, and a will be conflict noted.
847
temp_dir = mkdtemp(prefix="bzr-")
849
new_file = pathjoin(temp_dir, "new")
850
this = self.dump_file(temp_dir, "this", self.this_tree, file_id)
851
base = self.dump_file(temp_dir, "base", self.base_tree, file_id)
852
other = self.dump_file(temp_dir, "other", self.other_tree, file_id)
853
status = bzrlib.patch.diff3(new_file, this, base, other)
854
if status not in (0, 1):
855
raise BzrError("Unhandled diff3 exit code")
856
self.tt.create_file(file(new_file, "rb"), trans_id)
858
name = self.tt.final_name(trans_id)
859
parent_id = self.tt.final_parent(trans_id)
860
self._dump_conflicts(name, parent_id, file_id)
861
self._raw_conflicts.append(('text conflict', trans_id))
866
def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
868
merge_type=Merge3Merger,
869
interesting_ids=None,
873
interesting_files=None,
876
"""Primary interface for merging.
878
typical use is probably
879
'merge_inner(branch, branch.get_revision_tree(other_revision),
880
branch.get_revision_tree(base_revision))'
882
if this_tree is None:
883
warn("bzrlib.merge.merge_inner requires a this_tree parameter as of "
884
"bzrlib version 0.8.",
887
this_tree = this_branch.bzrdir.open_workingtree()
888
merger = Merger(this_branch, other_tree, base_tree, this_tree=this_tree,
890
merger.backup_files = backup_files
891
merger.merge_type = merge_type
892
merger.interesting_ids = interesting_ids
893
merger.ignore_zero = ignore_zero
894
if interesting_files:
895
assert not interesting_ids, ('Only supply interesting_ids'
896
' or interesting_files')
897
merger._set_interesting_files(interesting_files)
898
merger.show_base = show_base
899
merger.reprocess = reprocess
900
merger.other_rev_id = other_rev_id
901
merger.other_basis = other_rev_id
902
return merger.do_merge()
905
merge_types = { "merge3": (Merge3Merger, "Native diff3-style merge"),
906
"diff3": (Diff3Merger, "Merge using external diff3"),
907
'weave': (WeaveMerger, "Weave-based merge")
added
removed
bzrlib/merge.py
