291
319
ignore_zero - If true, suppress the "zero conflicts" message when
292
320
there are no conflicts; should be set when doing something we expect
293
321
to complete perfectly.
294
file_list - If supplied, merge only changes to selected files.
296
323
All available ancestors of other_revision and base_revision are
297
324
automatically pulled into the branch.
299
The revno may be -1 to indicate the last revision on the branch, which is
302
This function is intended for use from the command line; programmatic
303
clients might prefer to call merge_inner(), which has less magic behavior.
307
this_branch = Branch.open_containing(this_dir)[0]
308
if show_base and not merge_type is ApplyMerge3:
309
raise BzrCommandError("Show-base is not supported for this merge"
310
" type. %s" % merge_type)
311
if reprocess and not merge_type is ApplyMerge3:
312
raise BzrCommandError("Reprocess is not supported for this merge"
313
" type. %s" % merge_type)
314
if reprocess and show_base:
315
raise BzrCommandError("Cannot reprocess and show base.")
316
merger = Merger(this_branch)
317
merger.check_basis(check_clean)
318
merger.set_other(other_revision)
319
merger.set_base(base_revision)
320
merger.backup_files = backup_files
321
merger.merge_type = merge_type
322
merger.set_interesting_files(file_list)
323
merger.show_base = show_base
324
merger.reprocess = reprocess
325
merger.conflict_handler = MergeConflictHandler(merger.this_tree,
328
ignore_zero=ignore_zero)
329
conflicts = merger.do_merge()
333
def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
334
backup_files=False, merge_type=ApplyMerge3,
335
interesting_ids=None, show_base=False, reprocess=False):
336
"""Primary interface for merging.
338
typical use is probably
339
'merge_inner(branch, branch.get_revision_tree(other_revision),
340
branch.get_revision_tree(base_revision))'
342
merger = Merger(this_branch, other_tree, base_tree)
343
merger.backup_files = False
344
merger.merge_type = ApplyMerge3
345
merger.interesting_ids = interesting_ids
346
merger.show_base = show_base
347
merger.reprocess = reprocess
348
merger.conflict_handler = MergeConflictHandler(merger.this_tree, base_tree,
350
ignore_zero=ignore_zero)
351
return merger.do_merge()
354
class Merger(object):
355
def __init__(self, this_branch, other_tree=None, base_tree=None):
356
object.__init__(self)
357
self.this_branch = this_branch
358
self.this_basis = this_branch.last_revision()
359
self.this_rev_id = None
360
self.this_tree = this_branch.working_tree()
361
self.this_revision_tree = None
362
self.other_tree = other_tree
363
self.base_tree = base_tree
364
self.ignore_zero = False
365
self.backup_files = False
366
self.interesting_ids = None
367
self.show_base = False
368
self.reprocess = False
369
self.conflict_handler = MergeConflictHandler(self.this_tree, base_tree,
372
def revision_tree(self, revision_id):
373
return self.this_branch.revision_tree(revision_id)
375
def ensure_revision_trees(self):
376
if self.this_revision_tree is None:
377
if self.this_rev_id is None:
379
if self.this_rev_id is None:
380
raise WorkingTreeNotRevision(self.this_tree)
381
self.this_revision_tree = self.this_branch.revision_tree(
384
if self.other_rev_id is None:
385
other_basis_tree = self.revision_tree(self.other_basis)
386
changes = compare_trees(self.other_tree, other_basis_tree)
387
if changes.has_changed():
388
raise WorkingTreeNotRevision(self.this_tree)
389
other_rev_id = other_basis
390
self.other_tree = other_basis_tree
393
def file_revisions(self, file_id):
394
self.ensure_revision_trees()
395
def get_id(tree, file_id):
396
revision_id = tree.inventory[file_id].revision
397
assert revision_id is not None
399
trees = (self.this_revision_tree, self.other_tree)
400
return [get_id(tree, file_id) for tree in trees]
403
def merge_factory(self, file_id, base, other):
404
if self.merge_type.history_based:
405
t_revid, o_revid = self.file_revisions(file_id)
406
weave = self.this_revision_tree.get_weave(file_id)
407
contents_change = self.merge_type(weave, t_revid, o_revid)
409
if self.show_base is True or self.reprocess is True:
410
contents_change = self.merge_type(file_id, base, other,
411
show_base=self.show_base,
412
reprocess=self.reprocess)
414
contents_change = self.merge_type(file_id, base, other)
415
if self.backup_files:
416
contents_change = BackupBeforeChange(contents_change)
417
return contents_change
419
def check_basis(self, check_clean):
420
if self.this_basis is None:
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:
421
333
raise BzrCommandError("This branch has no commits")
424
if self.this_basis != self.this_rev_id:
335
changes = compare_trees(this_branch.working_tree(),
336
this_branch.basis_tree(), False)
337
if changes.has_changed():
425
338
raise BzrCommandError("Working tree has uncommitted changes.")
427
def compare_basis(self):
428
changes = compare_trees(self.this_branch.working_tree(),
429
self.this_branch.basis_tree(), False)
430
if not changes.has_changed():
431
self.this_rev_id = self.this_basis
433
def set_interesting_files(self, file_list):
434
if file_list is None:
435
self.interesting_ids = None
438
interesting_ids = set()
439
for fname in file_list:
440
path = self.this_tree.relpath(fname)
442
for tree in (self.this_tree, self.base_tree, self.other_tree):
443
file_id = tree.inventory.path2id(path)
444
if file_id is not None:
445
interesting_ids.add(file_id)
448
raise BzrCommandError("%s is not a source file in any"
450
self.interesting_ids = interesting_ids
452
def set_pending(self):
453
if not self.base_is_ancestor:
455
if self.other_rev_id is None:
457
if self.other_rev_id in self.this_branch.get_ancestry(self.this_basis):
459
self.this_branch.add_pending_merge(self.other_rev_id)
461
def set_other(self, other_revision):
462
other_branch, self.other_tree = get_tree(other_revision,
339
other_branch, other_tree = get_tree(other_revision, tempdir, "other",
464
341
if other_revision[1] == -1:
465
self.other_rev_id = other_branch.last_revision()
466
if self.other_rev_id is None:
342
other_rev_id = other_branch.last_revision()
343
if other_rev_id is None:
467
344
raise NoCommits(other_branch)
468
self.other_basis = self.other_rev_id
345
other_basis = other_rev_id
469
346
elif other_revision[1] is not None:
470
self.other_rev_id = other_branch.get_rev_id(other_revision[1])
471
self.other_basis = self.other_rev_id
347
other_rev_id = other_branch.get_rev_id(other_revision[1])
348
other_basis = other_rev_id
473
self.other_rev_id = None
474
self.other_basis = other_branch.last_revision()
475
if self.other_basis is None:
351
other_basis = other_branch.last_revision()
352
if other_basis is None:
476
353
raise NoCommits(other_branch)
477
fetch(from_branch=other_branch, to_branch=self.this_branch,
478
last_revision=self.other_basis)
480
def set_base(self, base_revision):
481
mutter("doing merge() with no base_revision specified")
482
354
if base_revision == [None, None]:
484
self.base_rev_id = common_ancestor(self.this_basis,
356
base_rev_id = common_ancestor(this_rev_id, other_basis,
487
358
except NoCommonAncestor:
488
359
raise UnrelatedBranches()
489
self.base_tree = get_revid_tree(self.this_branch, self.base_rev_id,
491
self.base_is_ancestor = True
360
base_tree = get_revid_tree(this_branch, base_rev_id, tempdir,
362
base_is_ancestor = True
493
base_branch, self.base_tree = get_tree(base_revision)
364
base_branch, base_tree = get_tree(base_revision, tempdir, "base")
494
365
if base_revision[1] == -1:
495
self.base_rev_id = base_branch.last_revision()
366
base_rev_id = base_branch.last_revision()
496
367
elif base_revision[1] is None:
497
self.base_rev_id = None
499
self.base_rev_id = base_branch.get_rev_id(base_revision[1])
500
fetch(from_branch=base_branch, to_branch=self.this_branch)
501
self.base_is_ancestor = is_ancestor(self.this_basis,
506
def get_inventory(tree):
507
return tree.inventory
509
inv_changes = merge_flex(self.this_tree, self.base_tree,
511
generate_changeset, get_inventory,
512
self.conflict_handler,
513
merge_factory=self.merge_factory,
514
interesting_ids=self.interesting_ids)
517
for id, path in inv_changes.iteritems():
522
assert path.startswith('.' + os.sep), "path is %s" % path
524
adjust_ids.append((path, id))
525
if len(adjust_ids) > 0:
526
self.this_branch.set_inventory(self.regen_inventory(adjust_ids))
527
conflicts = self.conflict_handler.conflicts
528
self.conflict_handler.finalize()
531
def regen_inventory(self, new_entries):
532
old_entries = self.this_branch.read_working_inventory()
536
for path, file_id in new_entries:
539
new_entries_map[file_id] = path
541
def id2path(file_id):
542
path = new_entries_map.get(file_id)
545
entry = old_entries[file_id]
546
if entry.parent_id is None:
548
return os.path.join(id2path(entry.parent_id), entry.name)
550
for file_id in old_entries:
551
entry = old_entries[file_id]
552
path = id2path(file_id)
553
new_inventory[file_id] = (path, file_id, entry.parent_id,
555
by_path[path] = file_id
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)
560
for path, file_id in new_entries:
562
del new_inventory[file_id]
565
new_path_list.append((path, file_id))
566
if file_id not in old_entries:
568
# Ensure no file is added before its parent
570
for path, file_id in new_path_list:
574
parent = by_path[os.path.dirname(path)]
575
abspath = os.path.join(self.this_tree.basedir, path)
576
kind = bzrlib.osutils.file_kind(abspath)
577
new_inventory[file_id] = (path, file_id, parent, kind)
578
by_path[path] = file_id
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
580
# Get a list in insertion order
581
new_inventory_list = new_inventory.values()
582
mutter ("""Inventory regeneration:
583
old length: %i insertions: %i deletions: %i new_length: %i"""\
584
% (len(old_entries), insertions, deletions,
585
len(new_inventory_list)))
586
assert len(new_inventory_list) == len(old_entries) + insertions\
588
new_inventory_list.sort()
589
return new_inventory_list
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
591
510
merge_types = { "merge3": (ApplyMerge3, "Native diff3-style merge"),
592
"diff3": (Diff3Merge, "Merge using external diff3"),
593
'weave': (WeaveMerge, "Weave-based merge")
511
"diff3": (Diff3Merge, "Merge using external diff3")