319
300
ignore_zero - If true, suppress the "zero conflicts" message when
320
301
there are no conflicts; should be set when doing something we expect
321
302
to complete perfectly.
303
file_list - If supplied, merge only changes to selected files.
323
305
All available ancestors of other_revision and base_revision are
324
306
automatically pulled into the branch.
308
The revno may be -1 to indicate the last revision on the branch, which is
311
This function is intended for use from the command line; programmatic
312
clients might prefer to call merge_inner(), which has less magic behavior.
326
tempdir = tempfile.mkdtemp(prefix="bzr-")
330
this_branch = Branch.open_containing(this_dir)
331
this_rev_id = this_branch.last_revision()
332
if this_rev_id is None:
316
this_branch = Branch.open_containing(this_dir)[0]
317
if show_base and not merge_type is ApplyMerge3:
318
raise BzrCommandError("Show-base is not supported for this merge"
319
" type. %s" % merge_type)
320
if reprocess and not merge_type is ApplyMerge3:
321
raise BzrCommandError("Reprocess is not supported for this merge"
322
" type. %s" % merge_type)
323
if reprocess and show_base:
324
raise BzrCommandError("Cannot reprocess and show base.")
325
merger = Merger(this_branch)
326
merger.check_basis(check_clean)
327
merger.set_other(other_revision)
328
merger.set_base(base_revision)
329
if merger.base_rev_id == merger.other_rev_id:
330
note('Nothing to do.')
332
merger.backup_files = backup_files
333
merger.merge_type = merge_type
334
merger.set_interesting_files(file_list)
335
merger.show_base = show_base
336
merger.reprocess = reprocess
337
merger.conflict_handler = MergeConflictHandler(merger.this_tree,
340
ignore_zero=ignore_zero)
341
conflicts = merger.do_merge()
345
def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
347
merge_type=ApplyMerge3,
348
interesting_ids=None,
352
interesting_files=None):
353
"""Primary interface for merging.
355
typical use is probably
356
'merge_inner(branch, branch.get_revision_tree(other_revision),
357
branch.get_revision_tree(base_revision))'
359
merger = Merger(this_branch, other_tree, base_tree)
360
merger.backup_files = backup_files
361
merger.merge_type = merge_type
362
merger.interesting_ids = interesting_ids
363
if interesting_files:
364
assert not interesting_ids, ('Only supply interesting_ids'
365
' or interesting_files')
366
merger._set_interesting_files(interesting_files)
367
merger.show_base = show_base
368
merger.reprocess = reprocess
369
merger.conflict_handler = MergeConflictHandler(merger.this_tree, base_tree,
371
ignore_zero=ignore_zero)
372
merger.other_rev_id = other_rev_id
373
merger.other_basis = other_rev_id
374
return merger.do_merge()
377
class Merger(object):
378
def __init__(self, this_branch, other_tree=None, base_tree=None):
379
object.__init__(self)
380
self.this_branch = this_branch
381
self.this_basis = this_branch.last_revision()
382
self.this_rev_id = None
383
self.this_tree = this_branch.working_tree()
384
self.this_revision_tree = None
385
self.this_basis_tree = None
386
self.other_tree = other_tree
387
self.base_tree = base_tree
388
self.ignore_zero = False
389
self.backup_files = False
390
self.interesting_ids = None
391
self.show_base = False
392
self.reprocess = False
393
self.conflict_handler = MergeConflictHandler(self.this_tree, base_tree,
396
def revision_tree(self, revision_id):
397
return self.this_branch.revision_tree(revision_id)
399
def ensure_revision_trees(self):
400
if self.this_revision_tree is None:
401
self.this_basis_tree = self.this_branch.revision_tree(
403
if self.this_basis == self.this_rev_id:
404
self.this_revision_tree = self.this_basis_tree
407
if self.other_rev_id is None:
408
other_basis_tree = self.revision_tree(self.other_basis)
409
changes = compare_trees(self.other_tree, other_basis_tree)
410
if changes.has_changed():
411
raise WorkingTreeNotRevision(self.this_tree)
412
other_rev_id = other_basis
413
self.other_tree = other_basis_tree
416
def file_revisions(self, file_id):
417
self.ensure_revision_trees()
418
def get_id(tree, file_id):
419
revision_id = tree.inventory[file_id].revision
420
assert revision_id is not None
422
if self.this_rev_id is None:
423
if self.this_basis_tree.get_file_sha1(file_id) != \
424
self.this_tree.get_file_sha1(file_id):
425
raise WorkingTreeNotRevision(self.this_tree)
427
trees = (self.this_basis_tree, self.other_tree)
428
return [get_id(tree, file_id) for tree in trees]
431
def merge_factory(self, file_id, base, other):
432
if self.merge_type.history_based:
433
if self.show_base is True:
434
raise BzrError("Cannot show base for hisory-based merges")
435
if self.reprocess is True:
436
raise BzrError("Cannot reprocess history-based merges")
438
t_revid, o_revid = self.file_revisions(file_id)
439
weave = self.this_basis_tree.get_weave(file_id)
440
contents_change = self.merge_type(weave, t_revid, o_revid)
442
if self.show_base is True or self.reprocess is True:
443
contents_change = self.merge_type(file_id, base, other,
444
show_base=self.show_base,
445
reprocess=self.reprocess)
447
contents_change = self.merge_type(file_id, base, other)
448
if self.backup_files:
449
contents_change = BackupBeforeChange(contents_change)
450
return contents_change
452
def check_basis(self, check_clean):
453
if self.this_basis is None:
333
454
raise BzrCommandError("This branch has no commits")
335
changes = compare_trees(this_branch.working_tree(),
336
this_branch.basis_tree(), False)
337
if changes.has_changed():
457
if self.this_basis != self.this_rev_id:
338
458
raise BzrCommandError("Working tree has uncommitted changes.")
339
other_branch, other_tree = get_tree(other_revision, tempdir, "other",
460
def compare_basis(self):
461
changes = compare_trees(self.this_branch.working_tree(),
462
self.this_branch.basis_tree(), False)
463
if not changes.has_changed():
464
self.this_rev_id = self.this_basis
466
def set_interesting_files(self, file_list):
468
self._set_interesting_files(file_list)
469
except NotVersionedError, e:
470
raise BzrCommandError("%s is not a source file in any"
473
def _set_interesting_files(self, file_list):
474
"""Set the list of interesting ids from a list of files."""
475
if file_list is None:
476
self.interesting_ids = None
479
interesting_ids = set()
480
for fname in file_list:
481
path = self.this_tree.relpath(fname)
483
for tree in (self.this_tree, self.base_tree, self.other_tree):
484
file_id = tree.inventory.path2id(path)
485
if file_id is not None:
486
interesting_ids.add(file_id)
489
raise NotVersionedError(path=fname)
490
self.interesting_ids = interesting_ids
492
def set_pending(self):
493
if not self.base_is_ancestor:
495
if self.other_rev_id is None:
497
if self.other_rev_id in self.this_branch.get_ancestry(self.this_basis):
499
self.this_branch.working_tree().add_pending_merge(self.other_rev_id)
501
def set_other(self, other_revision):
502
other_branch, self.other_tree = get_tree(other_revision,
341
504
if other_revision[1] == -1:
342
other_rev_id = other_branch.last_revision()
343
if other_rev_id is None:
505
self.other_rev_id = other_branch.last_revision()
506
if self.other_rev_id is None:
344
507
raise NoCommits(other_branch)
345
other_basis = other_rev_id
508
self.other_basis = self.other_rev_id
346
509
elif other_revision[1] is not None:
347
other_rev_id = other_branch.get_rev_id(other_revision[1])
348
other_basis = other_rev_id
510
self.other_rev_id = other_branch.get_rev_id(other_revision[1])
511
self.other_basis = self.other_rev_id
351
other_basis = other_branch.last_revision()
352
if other_basis is None:
513
self.other_rev_id = None
514
self.other_basis = other_branch.last_revision()
515
if self.other_basis is None:
353
516
raise NoCommits(other_branch)
517
fetch(from_branch=other_branch, to_branch=self.this_branch,
518
last_revision=self.other_basis)
520
def set_base(self, base_revision):
521
mutter("doing merge() with no base_revision specified")
354
522
if base_revision == [None, None]:
356
base_rev_id = common_ancestor(this_rev_id, other_basis,
524
self.base_rev_id = common_ancestor(self.this_basis,
358
527
except NoCommonAncestor:
359
528
raise UnrelatedBranches()
360
base_tree = get_revid_tree(this_branch, base_rev_id, tempdir,
362
base_is_ancestor = True
529
self.base_tree = get_revid_tree(self.this_branch, self.base_rev_id,
531
self.base_is_ancestor = True
364
base_branch, base_tree = get_tree(base_revision, tempdir, "base")
533
base_branch, self.base_tree = get_tree(base_revision)
365
534
if base_revision[1] == -1:
366
base_rev_id = base_branch.last_revision()
535
self.base_rev_id = base_branch.last_revision()
367
536
elif base_revision[1] is None:
370
base_rev_id = base_branch.get_rev_id(base_revision[1])
371
fetch(from_branch=base_branch, to_branch=this_branch)
372
base_is_ancestor = is_ancestor(this_rev_id, base_rev_id,
374
if file_list is None:
375
interesting_ids = None
377
interesting_ids = set()
378
this_tree = this_branch.working_tree()
379
for fname in file_list:
380
path = this_branch.relpath(fname)
382
for tree in (this_tree, base_tree.tree, other_tree.tree):
383
file_id = tree.inventory.path2id(path)
384
if file_id is not None:
385
interesting_ids.add(file_id)
388
raise BzrCommandError("%s is not a source file in any"
390
merge_inner(this_branch, other_tree, base_tree, tempdir,
391
ignore_zero=ignore_zero, backup_files=backup_files,
392
merge_type=merge_type, interesting_ids=interesting_ids)
393
if base_is_ancestor and other_rev_id is not None\
394
and other_rev_id not in this_branch.revision_history():
395
this_branch.add_pending_merge(other_rev_id)
397
shutil.rmtree(tempdir)
400
def set_interesting(inventory_a, inventory_b, interesting_ids):
401
"""Mark files whose ids are in interesting_ids as interesting
403
for inventory in (inventory_a, inventory_b):
404
for path, source_file in inventory.iteritems():
405
source_file.interesting = source_file.id in interesting_ids
408
def generate_cset_optimized(tree_a, tree_b, interesting_ids=None):
409
"""Generate a changeset. If interesting_ids is supplied, only changes
410
to those files will be shown. Metadata changes are stripped.
412
cset = generate_changeset(tree_a, tree_b, interesting_ids)
413
for entry in cset.entries.itervalues():
414
entry.metadata_change = None
418
def merge_inner(this_branch, other_tree, base_tree, tempdir,
419
ignore_zero=False, merge_type=ApplyMerge3, backup_files=False,
420
interesting_ids=None):
422
def merge_factory(file_id, base, other):
423
contents_change = merge_type(file_id, base, other)
425
contents_change = BackupBeforeChange(contents_change)
426
return contents_change
428
this_tree = get_tree((this_branch.base, None), tempdir, "this")[1]
430
def get_inventory(tree):
431
return tree.tree.inventory
433
inv_changes = merge_flex(this_tree, base_tree, other_tree,
434
generate_cset_optimized, get_inventory,
435
MergeConflictHandler(this_tree, base_tree,
436
other_tree, ignore_zero=ignore_zero),
437
merge_factory=merge_factory,
438
interesting_ids=interesting_ids)
441
for id, path in inv_changes.iteritems():
446
assert path.startswith('.' + os.sep), "path is %s" % path
448
adjust_ids.append((path, id))
449
if len(adjust_ids) > 0:
450
this_branch.set_inventory(regen_inventory(this_branch, this_tree.root,
454
def regen_inventory(this_branch, root, new_entries):
455
old_entries = this_branch.read_working_inventory()
459
for path, file_id in new_entries:
462
new_entries_map[file_id] = path
464
def id2path(file_id):
465
path = new_entries_map.get(file_id)
468
entry = old_entries[file_id]
469
if entry.parent_id is None:
471
return os.path.join(id2path(entry.parent_id), entry.name)
473
for file_id in old_entries:
474
entry = old_entries[file_id]
475
path = id2path(file_id)
476
new_inventory[file_id] = (path, file_id, entry.parent_id, entry.kind)
477
by_path[path] = file_id
482
for path, file_id in new_entries:
484
del new_inventory[file_id]
487
new_path_list.append((path, file_id))
488
if file_id not in old_entries:
490
# Ensure no file is added before its parent
492
for path, file_id in new_path_list:
496
parent = by_path[os.path.dirname(path)]
497
kind = bzrlib.osutils.file_kind(os.path.join(root, path))
498
new_inventory[file_id] = (path, file_id, parent, kind)
499
by_path[path] = file_id
501
# Get a list in insertion order
502
new_inventory_list = new_inventory.values()
503
mutter ("""Inventory regeneration:
504
old length: %i insertions: %i deletions: %i new_length: %i"""\
505
% (len(old_entries), insertions, deletions, len(new_inventory_list)))
506
assert len(new_inventory_list) == len(old_entries) + insertions - deletions
507
new_inventory_list.sort()
508
return new_inventory_list
537
self.base_rev_id = None
539
self.base_rev_id = base_branch.get_rev_id(base_revision[1])
540
fetch(from_branch=base_branch, to_branch=self.this_branch)
541
self.base_is_ancestor = is_ancestor(self.this_basis,
546
def get_inventory(tree):
547
return tree.inventory
549
inv_changes = merge_flex(self.this_tree, self.base_tree,
551
generate_changeset, get_inventory,
552
self.conflict_handler,
553
merge_factory=self.merge_factory,
554
interesting_ids=self.interesting_ids)
557
for id, path in inv_changes.iteritems():
562
assert path.startswith('.' + os.sep), "path is %s" % path
564
adjust_ids.append((path, id))
565
if len(adjust_ids) > 0:
566
self.this_branch.working_tree().set_inventory(self.regen_inventory(adjust_ids))
567
conflicts = self.conflict_handler.conflicts
568
self.conflict_handler.finalize()
571
def regen_inventory(self, new_entries):
572
old_entries = self.this_branch.working_tree().read_working_inventory()
576
for path, file_id in new_entries:
579
new_entries_map[file_id] = path
581
def id2path(file_id):
582
path = new_entries_map.get(file_id)
585
entry = old_entries[file_id]
586
if entry.parent_id is None:
588
return os.path.join(id2path(entry.parent_id), entry.name)
590
for file_id in old_entries:
591
entry = old_entries[file_id]
592
path = id2path(file_id)
593
new_inventory[file_id] = (path, file_id, entry.parent_id,
595
by_path[path] = file_id
600
for path, file_id in new_entries:
602
del new_inventory[file_id]
605
new_path_list.append((path, file_id))
606
if file_id not in old_entries:
608
# Ensure no file is added before its parent
610
for path, file_id in new_path_list:
614
parent = by_path[os.path.dirname(path)]
615
abspath = os.path.join(self.this_tree.basedir, path)
616
kind = bzrlib.osutils.file_kind(abspath)
617
new_inventory[file_id] = (path, file_id, parent, kind)
618
by_path[path] = file_id
620
# Get a list in insertion order
621
new_inventory_list = new_inventory.values()
622
mutter ("""Inventory regeneration:
623
old length: %i insertions: %i deletions: %i new_length: %i"""\
624
% (len(old_entries), insertions, deletions,
625
len(new_inventory_list)))
626
assert len(new_inventory_list) == len(old_entries) + insertions\
628
new_inventory_list.sort()
629
return new_inventory_list
510
631
merge_types = { "merge3": (ApplyMerge3, "Native diff3-style merge"),
511
"diff3": (Diff3Merge, "Merge using external diff3")
632
"diff3": (Diff3Merge, "Merge using external diff3"),
633
'weave': (WeaveMerge, "Weave-based merge")