1
# Copyright (C) 2005, 2006 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 tempfile import mkdtemp
23
from bzrlib.branch import Branch
24
from bzrlib.conflicts import ConflictList, Conflict
25
from bzrlib.delta import compare_trees
26
from bzrlib.errors import (BzrCommandError,
36
WorkingTreeNotRevision,
39
from bzrlib.merge3 import Merge3
41
from bzrlib.osutils import rename, pathjoin, rmtree
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.textfile import check_text_lines
46
from bzrlib.trace import mutter, warning, note
47
from bzrlib.transform import (TreeTransform, resolve_conflicts, cook_conflicts,
48
FinalPaths, create_by_entry, unique_add)
49
from bzrlib.versionedfile import WeaveMerge
52
# TODO: Report back as changes are merged in
54
def _get_tree(treespec, local_branch=None):
55
location, revno = treespec
56
branch = Branch.open_containing(location)[0]
60
revision = branch.last_revision()
62
revision = branch.get_rev_id(revno)
64
revision = NULL_REVISION
65
return branch, _get_revid_tree(branch, revision, local_branch)
68
def _get_revid_tree(branch, revision, local_branch):
70
base_tree = branch.bzrdir.open_workingtree()
72
if local_branch is not None:
73
if local_branch.base != branch.base:
74
local_branch.fetch(branch, revision)
75
base_tree = local_branch.repository.revision_tree(revision)
77
base_tree = branch.repository.revision_tree(revision)
81
def transform_tree(from_tree, to_tree, interesting_ids=None):
82
merge_inner(from_tree.branch, to_tree, from_tree, ignore_zero=True,
83
interesting_ids=interesting_ids, this_tree=from_tree)
87
def __init__(self, this_branch, other_tree=None, base_tree=None,
88
this_tree=None, pb=DummyProgress()):
90
assert this_tree is not None, "this_tree is required"
91
self.this_branch = this_branch
92
self.this_basis = this_branch.last_revision()
93
self.this_rev_id = None
94
self.this_tree = this_tree
95
self.this_revision_tree = None
96
self.this_basis_tree = None
97
self.other_tree = other_tree
98
self.base_tree = base_tree
99
self.ignore_zero = False
100
self.backup_files = False
101
self.interesting_ids = None
102
self.show_base = False
103
self.reprocess = False
108
def revision_tree(self, revision_id):
109
return self.this_branch.repository.revision_tree(revision_id)
111
def ensure_revision_trees(self):
112
if self.this_revision_tree is None:
113
self.this_basis_tree = self.this_branch.repository.revision_tree(
115
if self.this_basis == self.this_rev_id:
116
self.this_revision_tree = self.this_basis_tree
118
if self.other_rev_id is None:
119
other_basis_tree = self.revision_tree(self.other_basis)
120
changes = compare_trees(self.other_tree, other_basis_tree)
121
if changes.has_changed():
122
raise WorkingTreeNotRevision(self.this_tree)
123
other_rev_id = other_basis
124
self.other_tree = other_basis_tree
126
def file_revisions(self, file_id):
127
self.ensure_revision_trees()
128
def get_id(tree, file_id):
129
revision_id = tree.inventory[file_id].revision
130
assert revision_id is not None
132
if self.this_rev_id is None:
133
if self.this_basis_tree.get_file_sha1(file_id) != \
134
self.this_tree.get_file_sha1(file_id):
135
raise WorkingTreeNotRevision(self.this_tree)
137
trees = (self.this_basis_tree, self.other_tree)
138
return [get_id(tree, file_id) for tree in trees]
140
def check_basis(self, check_clean):
141
if self.this_basis is None:
142
raise BzrCommandError("This branch has no commits")
145
if self.this_basis != self.this_rev_id:
146
raise BzrCommandError("Working tree has uncommitted changes.")
148
def compare_basis(self):
149
changes = compare_trees(self.this_tree,
150
self.this_tree.basis_tree(), False)
151
if not changes.has_changed():
152
self.this_rev_id = self.this_basis
154
def set_interesting_files(self, file_list):
156
self._set_interesting_files(file_list)
157
except NotVersionedError, e:
158
raise BzrCommandError("%s is not a source file in any"
161
def _set_interesting_files(self, file_list):
162
"""Set the list of interesting ids from a list of files."""
163
if file_list is None:
164
self.interesting_ids = None
167
interesting_ids = set()
168
for path in file_list:
170
for tree in (self.this_tree, self.base_tree, self.other_tree):
171
file_id = tree.inventory.path2id(path)
172
if file_id is not None:
173
interesting_ids.add(file_id)
176
raise NotVersionedError(path=path)
177
self.interesting_ids = interesting_ids
179
def set_pending(self):
180
if not self.base_is_ancestor:
182
if self.other_rev_id is None:
184
ancestry = self.this_branch.repository.get_ancestry(self.this_basis)
185
if self.other_rev_id in ancestry:
187
self.this_tree.add_pending_merge(self.other_rev_id)
189
def set_other(self, other_revision):
190
other_branch, self.other_tree = _get_tree(other_revision,
192
if other_revision[1] == -1:
193
self.other_rev_id = other_branch.last_revision()
194
if self.other_rev_id is None:
195
raise NoCommits(other_branch)
196
self.other_basis = self.other_rev_id
197
elif other_revision[1] is not None:
198
self.other_rev_id = other_branch.get_rev_id(other_revision[1])
199
self.other_basis = self.other_rev_id
201
self.other_rev_id = None
202
self.other_basis = other_branch.last_revision()
203
if self.other_basis is None:
204
raise NoCommits(other_branch)
205
if other_branch.base != self.this_branch.base:
206
self.this_branch.fetch(other_branch, last_revision=self.other_basis)
208
def set_base(self, base_revision):
209
mutter("doing merge() with no base_revision specified")
210
if base_revision == [None, None]:
212
pb = bzrlib.ui.ui_factory.nested_progress_bar()
214
this_repo = self.this_branch.repository
215
self.base_rev_id = common_ancestor(self.this_basis,
220
except NoCommonAncestor:
221
raise UnrelatedBranches()
222
self.base_tree = _get_revid_tree(self.this_branch, self.base_rev_id,
224
self.base_is_ancestor = True
226
base_branch, self.base_tree = _get_tree(base_revision)
227
if base_revision[1] == -1:
228
self.base_rev_id = base_branch.last_revision()
229
elif base_revision[1] is None:
230
self.base_rev_id = None
232
self.base_rev_id = base_branch.get_rev_id(base_revision[1])
233
if self.this_branch.base != base_branch.base:
234
self.this_branch.fetch(base_branch)
235
self.base_is_ancestor = is_ancestor(self.this_basis,
240
kwargs = {'working_tree':self.this_tree, 'this_tree': self.this_tree,
241
'other_tree': self.other_tree,
242
'interesting_ids': self.interesting_ids,
244
if self.merge_type.requires_base:
245
kwargs['base_tree'] = self.base_tree
246
if self.merge_type.supports_reprocess:
247
kwargs['reprocess'] = self.reprocess
249
raise BzrError("Conflict reduction is not supported for merge"
250
" type %s." % self.merge_type)
251
if self.merge_type.supports_show_base:
252
kwargs['show_base'] = self.show_base
254
raise BzrError("Showing base is not supported for this"
255
" merge type. %s" % self.merge_type)
256
merge = self.merge_type(pb=self._pb, **kwargs)
257
if len(merge.cooked_conflicts) == 0:
258
if not self.ignore_zero:
259
note("All changes applied successfully.")
261
note("%d conflicts encountered." % len(merge.cooked_conflicts))
263
return len(merge.cooked_conflicts)
265
def regen_inventory(self, new_entries):
266
old_entries = self.this_tree.read_working_inventory()
270
for path, file_id in new_entries:
273
new_entries_map[file_id] = path
275
def id2path(file_id):
276
path = new_entries_map.get(file_id)
279
entry = old_entries[file_id]
280
if entry.parent_id is None:
282
return pathjoin(id2path(entry.parent_id), entry.name)
284
for file_id in old_entries:
285
entry = old_entries[file_id]
286
path = id2path(file_id)
287
if file_id in self.base_tree.inventory:
288
executable = getattr(self.base_tree.inventory[file_id], 'executable', False)
290
executable = getattr(entry, 'executable', False)
291
new_inventory[file_id] = (path, file_id, entry.parent_id,
292
entry.kind, executable)
294
by_path[path] = file_id
299
for path, file_id in new_entries:
301
del new_inventory[file_id]
304
new_path_list.append((path, file_id))
305
if file_id not in old_entries:
307
# Ensure no file is added before its parent
309
for path, file_id in new_path_list:
313
parent = by_path[os.path.dirname(path)]
314
abspath = pathjoin(self.this_tree.basedir, path)
315
kind = bzrlib.osutils.file_kind(abspath)
316
if file_id in self.base_tree.inventory:
317
executable = getattr(self.base_tree.inventory[file_id], 'executable', False)
320
new_inventory[file_id] = (path, file_id, parent, kind, executable)
321
by_path[path] = file_id
323
# Get a list in insertion order
324
new_inventory_list = new_inventory.values()
325
mutter ("""Inventory regeneration:
326
old length: %i insertions: %i deletions: %i new_length: %i"""\
327
% (len(old_entries), insertions, deletions,
328
len(new_inventory_list)))
329
assert len(new_inventory_list) == len(old_entries) + insertions\
331
new_inventory_list.sort()
332
return new_inventory_list
335
class Merge3Merger(object):
336
"""Three-way merger that uses the merge3 text merger"""
338
supports_reprocess = True
339
supports_show_base = True
340
history_based = False
342
def __init__(self, working_tree, this_tree, base_tree, other_tree,
343
interesting_ids=None, reprocess=False, show_base=False,
344
pb=DummyProgress(), pp=None):
345
"""Initialize the merger object and perform the merge."""
346
object.__init__(self)
347
self.this_tree = working_tree
348
self.base_tree = base_tree
349
self.other_tree = other_tree
350
self._raw_conflicts = []
351
self.cooked_conflicts = []
352
self.reprocess = reprocess
353
self.show_base = show_base
357
self.pp = ProgressPhase("Merge phase", 3, self.pb)
359
if interesting_ids is not None:
360
all_ids = interesting_ids
362
all_ids = set(base_tree)
363
all_ids.update(other_tree)
364
working_tree.lock_write()
365
self.tt = TreeTransform(working_tree, self.pb)
368
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
370
for num, file_id in enumerate(all_ids):
371
child_pb.update('Preparing file merge', num, len(all_ids))
372
self.merge_names(file_id)
373
file_status = self.merge_contents(file_id)
374
self.merge_executable(file_id, file_status)
379
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
381
fs_conflicts = resolve_conflicts(self.tt, child_pb)
384
self.cook_conflicts(fs_conflicts)
385
for conflict in self.cooked_conflicts:
388
results = self.tt.apply()
389
self.write_modified(results)
391
working_tree.set_conflicts(ConflictList(self.cooked_conflicts))
392
except UnsupportedOperation:
399
working_tree.unlock()
402
def write_modified(self, results):
404
for path in results.modified_paths:
405
file_id = self.this_tree.path2id(self.this_tree.relpath(path))
408
hash = self.this_tree.get_file_sha1(file_id)
411
modified_hashes[file_id] = hash
412
self.this_tree.set_merge_modified(modified_hashes)
415
def parent(entry, file_id):
416
"""Determine the parent for a file_id (used as a key method)"""
419
return entry.parent_id
422
def name(entry, file_id):
423
"""Determine the name for a file_id (used as a key method)"""
429
def contents_sha1(tree, file_id):
430
"""Determine the sha1 of the file contents (used as a key method)."""
431
if file_id not in tree:
433
return tree.get_file_sha1(file_id)
436
def executable(tree, file_id):
437
"""Determine the executability of a file-id (used as a key method)."""
438
if file_id not in tree:
440
if tree.kind(file_id) != "file":
442
return tree.is_executable(file_id)
445
def kind(tree, file_id):
446
"""Determine the kind of a file-id (used as a key method)."""
447
if file_id not in tree:
449
return tree.kind(file_id)
452
def scalar_three_way(this_tree, base_tree, other_tree, file_id, key):
453
"""Do a three-way test on a scalar.
454
Return "this", "other" or "conflict", depending whether a value wins.
456
key_base = key(base_tree, file_id)
457
key_other = key(other_tree, file_id)
458
#if base == other, either they all agree, or only THIS has changed.
459
if key_base == key_other:
461
key_this = key(this_tree, file_id)
462
if key_this not in (key_base, key_other):
464
# "Ambiguous clean merge"
465
elif key_this == key_other:
468
assert key_this == key_base
471
def merge_names(self, file_id):
472
"""Perform a merge on file_id names and parents"""
474
if file_id in tree.inventory:
475
return tree.inventory[file_id]
478
this_entry = get_entry(self.this_tree)
479
other_entry = get_entry(self.other_tree)
480
base_entry = get_entry(self.base_tree)
481
name_winner = self.scalar_three_way(this_entry, base_entry,
482
other_entry, file_id, self.name)
483
parent_id_winner = self.scalar_three_way(this_entry, base_entry,
484
other_entry, file_id,
486
if this_entry is None:
487
if name_winner == "this":
488
name_winner = "other"
489
if parent_id_winner == "this":
490
parent_id_winner = "other"
491
if name_winner == "this" and parent_id_winner == "this":
493
if name_winner == "conflict":
494
trans_id = self.tt.trans_id_file_id(file_id)
495
self._raw_conflicts.append(('name conflict', trans_id,
496
self.name(this_entry, file_id),
497
self.name(other_entry, file_id)))
498
if parent_id_winner == "conflict":
499
trans_id = self.tt.trans_id_file_id(file_id)
500
self._raw_conflicts.append(('parent conflict', trans_id,
501
self.parent(this_entry, file_id),
502
self.parent(other_entry, file_id)))
503
if other_entry is None:
504
# it doesn't matter whether the result was 'other' or
505
# 'conflict'-- if there's no 'other', we leave it alone.
507
# if we get here, name_winner and parent_winner are set to safe values.
508
winner_entry = {"this": this_entry, "other": other_entry,
509
"conflict": other_entry}
510
trans_id = self.tt.trans_id_file_id(file_id)
511
parent_id = winner_entry[parent_id_winner].parent_id
512
parent_trans_id = self.tt.trans_id_file_id(parent_id)
513
self.tt.adjust_path(winner_entry[name_winner].name, parent_trans_id,
516
def merge_contents(self, file_id):
517
"""Performa a merge on file_id contents."""
518
def contents_pair(tree):
519
if file_id not in tree:
521
kind = tree.kind(file_id)
522
if kind == "root_directory":
525
contents = tree.get_file_sha1(file_id)
526
elif kind == "symlink":
527
contents = tree.get_symlink_target(file_id)
530
return kind, contents
532
def contents_conflict():
533
trans_id = self.tt.trans_id_file_id(file_id)
534
name = self.tt.final_name(trans_id)
535
parent_id = self.tt.final_parent(trans_id)
536
if file_id in self.this_tree.inventory:
537
self.tt.unversion_file(trans_id)
538
self.tt.delete_contents(trans_id)
539
file_group = self._dump_conflicts(name, parent_id, file_id,
541
self._raw_conflicts.append(('contents conflict', file_group))
543
# See SPOT run. run, SPOT, run.
544
# So we're not QUITE repeating ourselves; we do tricky things with
546
base_pair = contents_pair(self.base_tree)
547
other_pair = contents_pair(self.other_tree)
548
if base_pair == other_pair:
549
# OTHER introduced no changes
551
this_pair = contents_pair(self.this_tree)
552
if this_pair == other_pair:
553
# THIS and OTHER introduced the same changes
556
trans_id = self.tt.trans_id_file_id(file_id)
557
if this_pair == base_pair:
558
# only OTHER introduced changes
559
if file_id in self.this_tree:
560
# Remove any existing contents
561
self.tt.delete_contents(trans_id)
562
if file_id in self.other_tree:
563
# OTHER changed the file
564
create_by_entry(self.tt,
565
self.other_tree.inventory[file_id],
566
self.other_tree, trans_id)
567
if file_id not in self.this_tree.inventory:
568
self.tt.version_file(file_id, trans_id)
570
elif file_id in self.this_tree.inventory:
571
# OTHER deleted the file
572
self.tt.unversion_file(trans_id)
574
#BOTH THIS and OTHER introduced changes; scalar conflict
575
elif this_pair[0] == "file" and other_pair[0] == "file":
576
# THIS and OTHER are both files, so text merge. Either
577
# BASE is a file, or both converted to files, so at least we
578
# have agreement that output should be a file.
580
self.text_merge(file_id, trans_id)
582
return contents_conflict()
583
if file_id not in self.this_tree.inventory:
584
self.tt.version_file(file_id, trans_id)
586
self.tt.tree_kind(trans_id)
587
self.tt.delete_contents(trans_id)
592
# Scalar conflict, can't text merge. Dump conflicts
593
return contents_conflict()
595
def get_lines(self, tree, file_id):
596
"""Return the lines in a file, or an empty list."""
598
return tree.get_file(file_id).readlines()
602
def text_merge(self, file_id, trans_id):
603
"""Perform a three-way text merge on a file_id"""
604
# it's possible that we got here with base as a different type.
605
# if so, we just want two-way text conflicts.
606
if file_id in self.base_tree and \
607
self.base_tree.kind(file_id) == "file":
608
base_lines = self.get_lines(self.base_tree, file_id)
611
other_lines = self.get_lines(self.other_tree, file_id)
612
this_lines = self.get_lines(self.this_tree, file_id)
613
m3 = Merge3(base_lines, this_lines, other_lines)
614
start_marker = "!START OF MERGE CONFLICT!" + "I HOPE THIS IS UNIQUE"
615
if self.show_base is True:
616
base_marker = '|' * 7
620
def iter_merge3(retval):
621
retval["text_conflicts"] = False
622
for line in m3.merge_lines(name_a = "TREE",
623
name_b = "MERGE-SOURCE",
624
name_base = "BASE-REVISION",
625
start_marker=start_marker,
626
base_marker=base_marker,
627
reprocess=self.reprocess):
628
if line.startswith(start_marker):
629
retval["text_conflicts"] = True
630
yield line.replace(start_marker, '<' * 7)
634
merge3_iterator = iter_merge3(retval)
635
self.tt.create_file(merge3_iterator, trans_id)
636
if retval["text_conflicts"] is True:
637
self._raw_conflicts.append(('text conflict', trans_id))
638
name = self.tt.final_name(trans_id)
639
parent_id = self.tt.final_parent(trans_id)
640
file_group = self._dump_conflicts(name, parent_id, file_id,
641
this_lines, base_lines,
643
file_group.append(trans_id)
645
def _dump_conflicts(self, name, parent_id, file_id, this_lines=None,
646
base_lines=None, other_lines=None, set_version=False,
648
"""Emit conflict files.
649
If this_lines, base_lines, or other_lines are omitted, they will be
650
determined automatically. If set_version is true, the .OTHER, .THIS
651
or .BASE (in that order) will be created as versioned files.
653
data = [('OTHER', self.other_tree, other_lines),
654
('THIS', self.this_tree, this_lines)]
656
data.append(('BASE', self.base_tree, base_lines))
659
for suffix, tree, lines in data:
661
trans_id = self._conflict_file(name, parent_id, tree, file_id,
663
file_group.append(trans_id)
664
if set_version and not versioned:
665
self.tt.version_file(file_id, trans_id)
669
def _conflict_file(self, name, parent_id, tree, file_id, suffix,
671
"""Emit a single conflict file."""
672
name = name + '.' + suffix
673
trans_id = self.tt.create_path(name, parent_id)
674
entry = tree.inventory[file_id]
675
create_by_entry(self.tt, entry, tree, trans_id, lines)
678
def merge_executable(self, file_id, file_status):
679
"""Perform a merge on the execute bit."""
680
if file_status == "deleted":
682
trans_id = self.tt.trans_id_file_id(file_id)
684
if self.tt.final_kind(trans_id) != "file":
688
winner = self.scalar_three_way(self.this_tree, self.base_tree,
689
self.other_tree, file_id,
691
if winner == "conflict":
692
# There must be a None in here, if we have a conflict, but we
693
# need executability since file status was not deleted.
694
if self.other_tree.is_executable(file_id) is None:
699
if file_status == "modified":
700
executability = self.this_tree.is_executable(file_id)
701
if executability is not None:
702
trans_id = self.tt.trans_id_file_id(file_id)
703
self.tt.set_executability(executability, trans_id)
705
assert winner == "other"
706
if file_id in self.other_tree:
707
executability = self.other_tree.is_executable(file_id)
708
elif file_id in self.this_tree:
709
executability = self.this_tree.is_executable(file_id)
710
elif file_id in self.base_tree:
711
executability = self.base_tree.is_executable(file_id)
712
if executability is not None:
713
trans_id = self.tt.trans_id_file_id(file_id)
714
self.tt.set_executability(executability, trans_id)
716
def cook_conflicts(self, fs_conflicts):
717
"""Convert all conflicts into a form that doesn't depend on trans_id"""
718
from conflicts import Conflict
720
self.cooked_conflicts.extend(cook_conflicts(fs_conflicts, self.tt))
721
fp = FinalPaths(self.tt)
722
for conflict in self._raw_conflicts:
723
conflict_type = conflict[0]
724
if conflict_type in ('name conflict', 'parent conflict'):
725
trans_id = conflict[1]
726
conflict_args = conflict[2:]
727
if trans_id not in name_conflicts:
728
name_conflicts[trans_id] = {}
729
unique_add(name_conflicts[trans_id], conflict_type,
731
if conflict_type == 'contents conflict':
732
for trans_id in conflict[1]:
733
file_id = self.tt.final_file_id(trans_id)
734
if file_id is not None:
736
path = fp.get_path(trans_id)
737
for suffix in ('.BASE', '.THIS', '.OTHER'):
738
if path.endswith(suffix):
739
path = path[:-len(suffix)]
741
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
742
self.cooked_conflicts.append(c)
743
if conflict_type == 'text conflict':
744
trans_id = conflict[1]
745
path = fp.get_path(trans_id)
746
file_id = self.tt.final_file_id(trans_id)
747
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
748
self.cooked_conflicts.append(c)
750
for trans_id, conflicts in name_conflicts.iteritems():
752
this_parent, other_parent = conflicts['parent conflict']
753
assert this_parent != other_parent
755
this_parent = other_parent = \
756
self.tt.final_file_id(self.tt.final_parent(trans_id))
758
this_name, other_name = conflicts['name conflict']
759
assert this_name != other_name
761
this_name = other_name = self.tt.final_name(trans_id)
762
other_path = fp.get_path(trans_id)
763
if this_parent is not None:
765
fp.get_path(self.tt.trans_id_file_id(this_parent))
766
this_path = pathjoin(this_parent_path, this_name)
768
this_path = "<deleted>"
769
file_id = self.tt.final_file_id(trans_id)
770
c = Conflict.factory('path conflict', path=this_path,
771
conflict_path=other_path, file_id=file_id)
772
self.cooked_conflicts.append(c)
773
self.cooked_conflicts.sort(key=Conflict.sort_key)
776
class WeaveMerger(Merge3Merger):
777
"""Three-way tree merger, text weave merger."""
778
supports_reprocess = True
779
supports_show_base = False
781
def __init__(self, working_tree, this_tree, base_tree, other_tree,
782
interesting_ids=None, pb=DummyProgress(), pp=None,
784
self.this_revision_tree = self._get_revision_tree(this_tree)
785
self.other_revision_tree = self._get_revision_tree(other_tree)
786
super(WeaveMerger, self).__init__(working_tree, this_tree,
787
base_tree, other_tree,
788
interesting_ids=interesting_ids,
789
pb=pb, pp=pp, reprocess=reprocess)
791
def _get_revision_tree(self, tree):
792
"""Return a revision tree releated to this tree.
793
If the tree is a WorkingTree, the basis will be returned.
795
if getattr(tree, 'get_weave', False) is False:
796
# If we have a WorkingTree, try using the basis
797
return tree.branch.basis_tree()
801
def _check_file(self, file_id):
802
"""Check that the revision tree's version of the file matches."""
803
for tree, rt in ((self.this_tree, self.this_revision_tree),
804
(self.other_tree, self.other_revision_tree)):
807
if tree.get_file_sha1(file_id) != rt.get_file_sha1(file_id):
808
raise WorkingTreeNotRevision(self.this_tree)
810
def _merged_lines(self, file_id):
811
"""Generate the merged lines.
812
There is no distinction between lines that are meant to contain <<<<<<<
815
weave = self.this_revision_tree.get_weave(file_id)
816
this_revision_id = self.this_revision_tree.inventory[file_id].revision
817
other_revision_id = \
818
self.other_revision_tree.inventory[file_id].revision
819
wm = WeaveMerge(weave, this_revision_id, other_revision_id,
820
'<<<<<<< TREE\n', '>>>>>>> MERGE-SOURCE\n')
821
return wm.merge_lines(self.reprocess)
823
def text_merge(self, file_id, trans_id):
824
"""Perform a (weave) text merge for a given file and file-id.
825
If conflicts are encountered, .THIS and .OTHER files will be emitted,
826
and a conflict will be noted.
828
self._check_file(file_id)
829
lines, conflicts = self._merged_lines(file_id)
831
# Note we're checking whether the OUTPUT is binary in this case,
832
# because we don't want to get into weave merge guts.
833
check_text_lines(lines)
834
self.tt.create_file(lines, trans_id)
836
self._raw_conflicts.append(('text conflict', trans_id))
837
name = self.tt.final_name(trans_id)
838
parent_id = self.tt.final_parent(trans_id)
839
file_group = self._dump_conflicts(name, parent_id, file_id,
841
file_group.append(trans_id)
844
class Diff3Merger(Merge3Merger):
845
"""Three-way merger using external diff3 for text merging"""
846
def dump_file(self, temp_dir, name, tree, file_id):
847
out_path = pathjoin(temp_dir, name)
848
out_file = file(out_path, "wb")
849
in_file = tree.get_file(file_id)
854
def text_merge(self, file_id, trans_id):
855
"""Perform a diff3 merge using a specified file-id and trans-id.
856
If conflicts are encountered, .BASE, .THIS. and .OTHER conflict files
857
will be dumped, and a will be conflict noted.
860
temp_dir = mkdtemp(prefix="bzr-")
862
new_file = pathjoin(temp_dir, "new")
863
this = self.dump_file(temp_dir, "this", self.this_tree, file_id)
864
base = self.dump_file(temp_dir, "base", self.base_tree, file_id)
865
other = self.dump_file(temp_dir, "other", self.other_tree, file_id)
866
status = bzrlib.patch.diff3(new_file, this, base, other)
867
if status not in (0, 1):
868
raise BzrError("Unhandled diff3 exit code")
869
self.tt.create_file(file(new_file, "rb"), trans_id)
871
name = self.tt.final_name(trans_id)
872
parent_id = self.tt.final_parent(trans_id)
873
self._dump_conflicts(name, parent_id, file_id)
874
self._raw_conflicts.append(('text conflict', trans_id))
879
def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
881
merge_type=Merge3Merger,
882
interesting_ids=None,
886
interesting_files=None,
889
"""Primary interface for merging.
891
typical use is probably
892
'merge_inner(branch, branch.get_revision_tree(other_revision),
893
branch.get_revision_tree(base_revision))'
895
if this_tree is None:
896
warn("bzrlib.merge.merge_inner requires a this_tree parameter as of "
897
"bzrlib version 0.8.",
900
this_tree = this_branch.bzrdir.open_workingtree()
901
merger = Merger(this_branch, other_tree, base_tree, this_tree=this_tree,
903
merger.backup_files = backup_files
904
merger.merge_type = merge_type
905
merger.interesting_ids = interesting_ids
906
merger.ignore_zero = ignore_zero
907
if interesting_files:
908
assert not interesting_ids, ('Only supply interesting_ids'
909
' or interesting_files')
910
merger._set_interesting_files(interesting_files)
911
merger.show_base = show_base
912
merger.reprocess = reprocess
913
merger.other_rev_id = other_rev_id
914
merger.other_basis = other_rev_id
915
return merger.do_merge()
918
merge_types = { "merge3": (Merge3Merger, "Native diff3-style merge"),
919
"diff3": (Diff3Merger, "Merge using external diff3"),
920
'weave': (WeaveMerger, "Weave-based merge")
added
removed
bzrlib/merge.py
