~bzr-pqm/bzr/bzr.dev : contents of bzrlib/merge.py at revision 6520

~bzr-pqm/bzr/bzr.dev : (revision 6520)

5752.3.8 by John Arbash Meinel Merge bzr.dev 5764 to resolve release-notes (aka NEWS) conflicts	1	# Copyright (C) 2005-2011 Canonical Ltd
1773.4.1 by Martin Pool Add pyflakes makefile target; fix many warnings	2	#
1110 by Martin Pool - merge aaron's merge improvements:	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.
1773.4.1 by Martin Pool Add pyflakes makefile target; fix many warnings	7	#
1110 by Martin Pool - merge aaron's merge improvements:	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.
1773.4.1 by Martin Pool Add pyflakes makefile target; fix many warnings	12	#
1110 by Martin Pool - merge aaron's merge improvements:	13	# You should have received a copy of the GNU General Public License
1110 by Martin Pool - merge aaron's merge improvements:	14	# along with this program; if not, write to the Free Software
4183.7.1 by Sabin Iacob update FSF mailing address	15	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1110 by Martin Pool - merge aaron's merge improvements:	16
6379.6.1 by Jelmer Vernooij Import absolute_import in a few places.	17	from __future__ import absolute_import
	18
4961.2.11 by Martin Pool Pull out pbs and ProgressPhases stored in object state; just use them in single functions	19	import warnings
1545.2.3 by Aaron Bentley Updated following j-a-meinel's comments	20
5246.2.15 by Andrew Bennetts Lazy import most things in merge.py, to minimise the impact of plugins that need to import bzrlib.merge to install a hook.	21	from bzrlib.lazy_import import lazy_import
	22	lazy_import(globals(), """
1996.3.18 by John Arbash Meinel Now that mkdtemp and rmtree are lazy, they should not be directly improted.	23	from bzrlib import (
4721.3.1 by Vincent Ladeuil Cleanup imports.	24	branch as _mod_branch,
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	25	cleanup,
4721.3.1 by Vincent Ladeuil Cleanup imports.	26	conflicts as _mod_conflicts,
1551.19.17 by Aaron Bentley Add debugging flag for merges	27	debug,
5246.2.9 by Andrew Bennetts Make all the existing tests pass.	28	generate_ids,
3514.2.14 by John Arbash Meinel Bring in the code to collapse linear portions of the graph.	29	graph as _mod_graph,
4721.3.1 by Vincent Ladeuil Cleanup imports.	30	merge3,
1996.3.18 by John Arbash Meinel Now that mkdtemp and rmtree are lazy, they should not be directly improted.	31	osutils,
1551.15.46 by Aaron Bentley Move plan merge to tree	32	patiencediff,
2598.5.1 by Aaron Bentley Start eliminating the use of None to indicate null revision	33	revision as _mod_revision,
4721.3.1 by Vincent Ladeuil Cleanup imports.	34	textfile,
	35	trace,
	36	transform,
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	37	tree as _mod_tree,
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	38	tsort,
4721.3.1 by Vincent Ladeuil Cleanup imports.	39	ui,
5246.2.15 by Andrew Bennetts Lazy import most things in merge.py, to minimise the impact of plugins that need to import bzrlib.merge to install a hook.	40	versionedfile,
5246.2.27 by Andrew Bennetts Remove merge_into_helper for now, as it currently has no callers.	41	workingtree,
1996.3.18 by John Arbash Meinel Now that mkdtemp and rmtree are lazy, they should not be directly improted.	42	)
6138.3.4 by Jonathan Riddell add gettext() to uses of trace.note()	43	from bzrlib.i18n import gettext
5246.2.15 by Andrew Bennetts Lazy import most things in merge.py, to minimise the impact of plugins that need to import bzrlib.merge to install a hook.	44	""")
	45	from bzrlib import (
	46	decorators,
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	47	errors,
5246.2.15 by Andrew Bennetts Lazy import most things in merge.py, to minimise the impact of plugins that need to import bzrlib.merge to install a hook.	48	hooks,
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	49	registry,
5246.2.15 by Andrew Bennetts Lazy import most things in merge.py, to minimise the impact of plugins that need to import bzrlib.merge to install a hook.	50	)
4721.3.2 by Vincent Ladeuil Simplify mutable_tree.has_changes() and update call sites.	51	from bzrlib.symbol_versioning import (
	52	deprecated_in,
	53	deprecated_method,
	54	)
1545.2.6 by Aaron Bentley Removed _merge, renamed MergeConflictHandler to _MergeConflictHandler	55	# TODO: Report back as changes are merged in
	56
2325.3.1 by John Arbash Meinel New helper function for merge, which allows us to re-use the existing workingtree, rather than opening it again.	57
1185.35.4 by Aaron Bentley Implemented remerge	58	def transform_tree(from_tree, to_tree, interesting_ids=None):
4595.13.1 by Alexander Belchenko [cherrypick revno.4635 from bzr.dev] (robertc) Fix many locking errors on windows due to a small bug in merge.transform_tree. (Robert Collins)	59	from_tree.lock_tree_write()
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	60	operation = cleanup.OperationWithCleanups(merge_inner)
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	61	operation.add_cleanup(from_tree.unlock)
	62	operation.run_simple(from_tree.branch, to_tree, from_tree,
	63	ignore_zero=True, interesting_ids=interesting_ids, this_tree=from_tree)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	64
1457.1.12 by Robert Collins Update comment to reflect author.	65
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	66	class MergeHooks(hooks.Hooks):
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	67
5622.3.10 by Jelmer Vernooij Don't require arguments to hooks.	68	def __init__(self):
	69	hooks.Hooks.__init__(self, "bzrlib.merge", "Merger.hooks")
5622.3.2 by Jelmer Vernooij Add more lazily usable hook points.	70	self.add_hook('merge_file_content',
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	71	"Called with a bzrlib.merge.Merger object to create a per file "
	72	"merge object when starting a merge. "
	73	"Should return either None or a subclass of "
	74	"``bzrlib.merge.AbstractPerFileMerger``. "
	75	"Such objects will then be called per file "
	76	"that needs to be merged (including when one "
	77	"side has deleted the file and the other has changed it). "
	78	"See the AbstractPerFileMerger API docs for details on how it is "
	79	"used by merge.",
5622.3.2 by Jelmer Vernooij Add more lazily usable hook points.	80	(2, 1))
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	81	self.add_hook('pre_merge',
6388.1.4 by Jelmer Vernooij Fix tests.	82	'Called before a merge. '
6388.1.4 by Jelmer Vernooij Fix tests.	83	'Receives a Merger object as the single argument.',
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	84	(2, 5))
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	85	self.add_hook('post_merge',
6388.1.4 by Jelmer Vernooij Fix tests.	86	'Called after a merge. '
6388.1.4 by Jelmer Vernooij Fix tests.	87	'Receives a Merger object as the single argument. '
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	88	'The return value is ignored.',
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	89	(2, 5))
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	90
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	91
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	92	class AbstractPerFileMerger(object):
	93	"""PerFileMerger objects are used by plugins extending merge for bzrlib.
	94
	95	See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
	96
	97	:ivar merger: The Merge3Merger performing the merge.
	98	"""
	99
	100	def __init__(self, merger):
	101	"""Create a PerFileMerger for use with merger."""
	102	self.merger = merger
	103
	104	def merge_contents(self, merge_params):
	105	"""Attempt to merge the contents of a single file.
	106
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	107	:param merge_params: A bzrlib.merge.MergeFileHookParams
5891.1.2 by Andrew Bennetts Fix a bunch of docstring formatting nits, making pydoctor a bit happier.	108	:return: A tuple of (status, chunks), where status is one of
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	109	'not_applicable', 'success', 'conflicted', or 'delete'. If status
	110	is 'success' or 'conflicted', then chunks should be an iterable of
	111	strings for the new file contents.
	112	"""
	113	return ('not applicable', None)
	114
	115
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	116	class PerFileMerger(AbstractPerFileMerger):
	117	"""Merge individual files when self.file_matches returns True.
	118
	119	This class is intended to be subclassed. The file_matches and
	120	merge_matching methods should be overridden with concrete implementations.
	121	"""
	122
	123	def file_matches(self, params):
	124	"""Return True if merge_matching should be called on this file.
	125
	126	Only called with merges of plain files with no clear winner.
	127
	128	Subclasses must override this.
	129	"""
	130	raise NotImplementedError(self.file_matches)
	131
	132	def get_filename(self, params, tree):
	133	"""Lookup the filename (i.e. basename, not path), given a Tree (e.g.
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	134	self.merger.this_tree) and a MergeFileHookParams.
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	135	"""
5168.2.3 by Andrew Bennetts Change implementation of get_filename as suggested by John.	136	return osutils.basename(tree.id2path(params.file_id))
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	137
	138	def get_filepath(self, params, tree):
	139	"""Calculate the path to the file in a tree.
	140
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	141	:param params: A MergeFileHookParams describing the file to merge
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	142	:param tree: a Tree, e.g. self.merger.this_tree.
	143	"""
	144	return tree.id2path(params.file_id)
	145
	146	def merge_contents(self, params):
	147	"""Merge the contents of a single file."""
	148	# Check whether this custom merge logic should be used.
	149	if (
	150	# OTHER is a straight winner, rely on default merge.
	151	params.winner == 'other' or
	152	# THIS and OTHER aren't both files.
	153	not params.is_file_merge() or
6282.3.1 by Vincent Ladeuil First cut at a working plugin to avoid conflicts in .po files by shelling out to msgmerge.	154	# The filename doesn't match
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	155	not self.file_matches(params)):
	156	return 'not_applicable', None
5168.2.3 by Andrew Bennetts Change implementation of get_filename as suggested by John.	157	return self.merge_matching(params)
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	158
	159	def merge_matching(self, params):
	160	"""Merge the contents of a single file that has matched the criteria
	161	in PerFileMerger.merge_contents (is a conflict, is a file,
	162	self.file_matches is True).
	163
	164	Subclasses must override this.
	165	"""
	166	raise NotImplementedError(self.merge_matching)
	167
	168
	169	class ConfigurableFileMerger(PerFileMerger):
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	170	"""Merge individual files when configured via a .conf file.
	171
	172	This is a base class for concrete custom file merging logic. Concrete
	173	classes should implement ``merge_text``.
	174
4797.9.1 by Vincent Ladeuil No test was exercising the faulty code path.	175	See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
	176
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	177	:ivar affected_files: The configured file paths to merge.
4797.9.1 by Vincent Ladeuil No test was exercising the faulty code path.	178
4797.5.3 by Robert Collins Tweak ConfigurableFileMerger to use class variables rather than requiring __init__ wrapping as future proofing for helper functions.	179	:cvar name_prefix: The prefix to use when looking up configuration
4797.9.1 by Vincent Ladeuil No test was exercising the faulty code path.	180	details. <name_prefix>_merge_files describes the files targeted by the
	181	hook for example.
	182
4797.5.3 by Robert Collins Tweak ConfigurableFileMerger to use class variables rather than requiring __init__ wrapping as future proofing for helper functions.	183	:cvar default_files: The default file paths to merge when no configuration
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	184	is present.
	185	"""
	186
4797.5.3 by Robert Collins Tweak ConfigurableFileMerger to use class variables rather than requiring __init__ wrapping as future proofing for helper functions.	187	name_prefix = None
	188	default_files = None
	189
	190	def __init__(self, merger):
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	191	super(ConfigurableFileMerger, self).__init__(merger)
	192	self.affected_files = None
4797.5.3 by Robert Collins Tweak ConfigurableFileMerger to use class variables rather than requiring __init__ wrapping as future proofing for helper functions.	193	self.default_files = self.__class__.default_files or []
	194	self.name_prefix = self.__class__.name_prefix
	195	if self.name_prefix is None:
	196	raise ValueError("name_prefix must be set.")
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	197
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	198	def file_matches(self, params):
4797.9.1 by Vincent Ladeuil No test was exercising the faulty code path.	199	"""Check whether the file should call the merge hook.
	200
	201	<name_prefix>_merge_files configuration variable is a list of files
	202	that should use the hook.
	203	"""
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	204	affected_files = self.affected_files
	205	if affected_files is None:
4797.21.1 by Aaron Bentley Fix merge when this_tree is not a WorkingTree.	206	config = self.merger.this_branch.get_config()
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	207	# Until bzr provides a better policy for caching the config, we
	208	# just add the part we're interested in to the params to avoid
	209	# reading the config files repeatedly (bazaar.conf, location.conf,
	210	# branch.conf).
	211	config_key = self.name_prefix + '_merge_files'
	212	affected_files = config.get_user_option_as_list(config_key)
	213	if affected_files is None:
	214	# If nothing was specified in the config, use the default.
	215	affected_files = self.default_files
	216	self.affected_files = affected_files
	217	if affected_files:
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	218	filepath = self.get_filepath(params, self.merger.this_tree)
	219	if filepath in affected_files:
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	220	return True
	221	return False
	222
5168.2.2 by Andrew Bennetts Create a PerFileMerger helper class that is midway between AbstractPerFileMerger and ConfigurableFileMerger. It allows the example merge plugin in the docs (the always conflict *.xml files) to be much, much simpler.	223	def merge_matching(self, params):
4797.9.1 by Vincent Ladeuil No test was exercising the faulty code path.	224	return self.merge_text(params)
4797.5.2 by Robert Collins Refactor NewsMerger into a reusable base class merge.ConfigurableFileMerger.	225
	226	def merge_text(self, params):
	227	"""Merge the byte contents of a single file.
	228
	229	This is called after checking that the merge should be performed in
	230	merge_contents, and it should behave as per
	231	``bzrlib.merge.AbstractPerFileMerger.merge_contents``.
	232	"""
	233	raise NotImplementedError(self.merge_text)
	234
	235
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	236	class MergeFileHookParams(object):
4869.3.11 by Andrew Bennetts More docs.	237	"""Object holding parameters passed to merge_file_content hooks.
4869.3.11 by Andrew Bennetts More docs.	238
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	239	There are some fields hooks can access:
4869.3.11 by Andrew Bennetts More docs.	240
4869.3.11 by Andrew Bennetts More docs.	241	:ivar file_id: the file ID of the file being merged
4869.3.24 by Andrew Bennetts Mention 'winner' attribute in MergeHookParams' docstring.	242	:ivar trans_id: the transform ID for the merge of this file
4869.3.21 by Andrew Bennetts Pass kinds (not pairs) to MergeHookParams.	243	:ivar this_kind: kind of file_id in 'this' tree
	244	:ivar other_kind: kind of file_id in 'other' tree
4869.3.24 by Andrew Bennetts Mention 'winner' attribute in MergeHookParams' docstring.	245	:ivar winner: one of 'this', 'other', 'conflict'
4869.3.11 by Andrew Bennetts More docs.	246	"""
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	247
4869.3.21 by Andrew Bennetts Pass kinds (not pairs) to MergeHookParams.	248	def __init__(self, merger, file_id, trans_id, this_kind, other_kind,
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	249	winner):
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	250	self._merger = merger
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	251	self.file_id = file_id
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	252	self.trans_id = trans_id
4869.3.21 by Andrew Bennetts Pass kinds (not pairs) to MergeHookParams.	253	self.this_kind = this_kind
	254	self.other_kind = other_kind
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	255	self.winner = winner
4869.3.34 by Vincent Ladeuil Finish the patch based on reviews.	256
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	257	def is_file_merge(self):
4869.3.21 by Andrew Bennetts Pass kinds (not pairs) to MergeHookParams.	258	"""True if this_kind and other_kind are both 'file'."""
	259	return self.this_kind == 'file' and self.other_kind == 'file'
4869.3.34 by Vincent Ladeuil Finish the patch based on reviews.	260
4869.3.13 by Andrew Bennetts Add simple cachedproperty decorator, and add {this,other,base}_lines cachedproperties to MergeHookParams.	261	@decorators.cachedproperty
	262	def base_lines(self):
	263	"""The lines of the 'base' version of the file."""
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	264	return self._merger.get_lines(self._merger.base_tree, self.file_id)
4869.3.13 by Andrew Bennetts Add simple cachedproperty decorator, and add {this,other,base}_lines cachedproperties to MergeHookParams.	265
	266	@decorators.cachedproperty
	267	def this_lines(self):
	268	"""The lines of the 'this' version of the file."""
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	269	return self._merger.get_lines(self._merger.this_tree, self.file_id)
4869.3.13 by Andrew Bennetts Add simple cachedproperty decorator, and add {this,other,base}_lines cachedproperties to MergeHookParams.	270
	271	@decorators.cachedproperty
	272	def other_lines(self):
	273	"""The lines of the 'other' version of the file."""
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	274	return self._merger.get_lines(self._merger.other_tree, self.file_id)
4869.3.13 by Andrew Bennetts Add simple cachedproperty decorator, and add {this,other,base}_lines cachedproperties to MergeHookParams.	275
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	276
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	277	class Merger(object):
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	278
5622.3.10 by Jelmer Vernooij Don't require arguments to hooks.	279	hooks = MergeHooks()
4869.3.1 by Andrew Bennetts Basic per-file merge hook.	280
2255.2.31 by Robert Collins Work in progress to make merge_inner work with dirstate trees.	281	def __init__(self, this_branch, other_tree=None, base_tree=None,
1551.21.8 by Aaron Bentley Remove now-redundant DummyProgress from Merger.__init__	282	this_tree=None, pb=None, change_reporter=None,
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	283	recurse='down', revision_graph=None):
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	284	object.__init__(self)
	285	self.this_branch = this_branch
2598.5.4 by Aaron Bentley Restore original Branch.last_revision behavior, fix bits that care	286	self.this_basis = _mod_revision.ensure_null(
	287	this_branch.last_revision())
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	288	self.this_rev_id = None
1534.4.26 by Robert Collins Move working tree initialisation out from Branch.initialize, deprecated Branch.initialize to Branch.create.	289	self.this_tree = this_tree
1185.12.83 by Aaron Bentley Preliminary weave merge support	290	self.this_revision_tree = None
1185.35.5 by Aaron Bentley Made weave merge succeed if interesting files match history	291	self.this_basis_tree = None
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	292	self.other_tree = other_tree
2100.3.29 by Aaron Bentley Get merge working initially	293	self.other_branch = None
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	294	self.base_tree = base_tree
	295	self.ignore_zero = False
	296	self.backup_files = False
	297	self.interesting_ids = None
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	298	self.interesting_files = None
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	299	self.show_base = False
1185.24.3 by Aaron Bentley Integrated reprocessing into the rest of the merge stuff	300	self.reprocess = False
4961.2.11 by Martin Pool Pull out pbs and ProgressPhases stored in object state; just use them in single functions	301	if pb is not None:
	302	warnings.warn("pb parameter to Merger() is deprecated and ignored")
1551.2.32 by Aaron Bentley Handle progress phases more nicely in merge	303	self.pp = None
2100.3.29 by Aaron Bentley Get merge working initially	304	self.recurse = recurse
1551.11.9 by Aaron Bentley Apply change reporting to merge	305	self.change_reporter = change_reporter
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	306	self._cached_trees = {}
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	307	self._revision_graph = revision_graph
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	308	self._base_is_ancestor = None
	309	self._base_is_other_ancestor = None
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	310	self._is_criss_cross = None
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	311	self._lca_trees = None
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	312
4595.13.2 by Alexander Belchenko [cherrypick revno 4650 from bzr.dev] Fix shelve on windows. (Robert Collins, #305006)	313	def cache_trees_with_revision_ids(self, trees):
	314	"""Cache any tree in trees if it has a revision_id."""
	315	for maybe_tree in trees:
	316	if maybe_tree is None:
	317	continue
	318	try:
	319	rev_id = maybe_tree.get_revision_id()
	320	except AttributeError:
	321	continue
	322	self._cached_trees[rev_id] = maybe_tree
	323
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	324	@property
	325	def revision_graph(self):
	326	if self._revision_graph is None:
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	327	self._revision_graph = self.this_branch.repository.get_graph()
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	328	return self._revision_graph
	329
	330	def _set_base_is_ancestor(self, value):
	331	self._base_is_ancestor = value
	332
	333	def _get_base_is_ancestor(self):
	334	if self._base_is_ancestor is None:
	335	self._base_is_ancestor = self.revision_graph.is_ancestor(
	336	self.base_rev_id, self.this_basis)
	337	return self._base_is_ancestor
	338
	339	base_is_ancestor = property(_get_base_is_ancestor, _set_base_is_ancestor)
	340
	341	def _set_base_is_other_ancestor(self, value):
	342	self._base_is_other_ancestor = value
	343
	344	def _get_base_is_other_ancestor(self):
	345	if self._base_is_other_ancestor is None:
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	346	if self.other_basis is None:
	347	return True
	348	self._base_is_other_ancestor = self.revision_graph.is_ancestor(
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	349	self.base_rev_id, self.other_basis)
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	350	return self._base_is_other_ancestor
	351
	352	base_is_other_ancestor = property(_get_base_is_other_ancestor,
	353	_set_base_is_other_ancestor)
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	354
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	355	@staticmethod
1551.21.7 by Aaron Bentley Fix progress warning	356	def from_uncommitted(tree, other_tree, pb=None, base_tree=None):
1551.15.74 by Aaron Bentley Textual updates from review	357	"""Return a Merger for uncommitted changes in other_tree.
	358
	359	:param tree: The tree to merge into
	360	:param other_tree: The tree to get uncommitted changes from
	361	:param pb: A progress indicator
3363.17.17 by Aaron Bentley Start testing merging PreviewTree as OTHER	362	:param base_tree: The basis to use for the merge. If unspecified,
	363	other_tree.basis_tree() will be used.
1551.15.74 by Aaron Bentley Textual updates from review	364	"""
3363.17.17 by Aaron Bentley Start testing merging PreviewTree as OTHER	365	if base_tree is None:
	366	base_tree = other_tree.basis_tree()
	367	merger = Merger(tree.branch, other_tree, base_tree, tree, pb)
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	368	merger.base_rev_id = merger.base_tree.get_revision_id()
	369	merger.other_rev_id = None
3146.5.1 by Aaron Bentley Make merge --uncommitted work with merge-type weave	370	merger.other_basis = merger.base_rev_id
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	371	return merger
	372
	373	@classmethod
	374	def from_mergeable(klass, tree, mergeable, pb):
1551.15.74 by Aaron Bentley Textual updates from review	375	"""Return a Merger for a bundle or merge directive.
	376
	377	:param tree: The tree to merge changes into
	378	:param mergeable: A merge directive or bundle
	379	:param pb: A progress indicator
	380	"""
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	381	mergeable.install_revisions(tree.branch.repository)
	382	base_revision_id, other_revision_id, verified =\
	383	mergeable.get_merge_request(tree.branch.repository)
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	384	revision_graph = tree.branch.repository.get_graph()
1551.19.44 by Aaron Bentley Fix handling of old merge directives with stricter get_parent_map	385	if base_revision_id is not None:
	386	if (base_revision_id != _mod_revision.NULL_REVISION and
	387	revision_graph.is_ancestor(
	388	base_revision_id, tree.branch.last_revision())):
	389	base_revision_id = None
	390	else:
4721.3.1 by Vincent Ladeuil Cleanup imports.	391	trace.warning('Performing cherrypick')
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	392	merger = klass.from_revision_ids(pb, tree, other_revision_id,
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	393	base_revision_id, revision_graph=
	394	revision_graph)
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	395	return merger, verified
	396
	397	@staticmethod
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	398	def from_revision_ids(pb, tree, other, base=None, other_branch=None,
3363.17.1 by Aaron Bentley Avoid inventory for merge and transform code	399	base_branch=None, revision_graph=None,
	400	tree_branch=None):
1551.15.74 by Aaron Bentley Textual updates from review	401	"""Return a Merger for revision-ids.
1551.15.74 by Aaron Bentley Textual updates from review	402
3363.17.15 by Aaron Bentley Update docs	403	:param pb: A progress indicator
1551.15.74 by Aaron Bentley Textual updates from review	404	:param tree: The tree to merge changes into
	405	:param other: The revision-id to use as OTHER
	406	:param base: The revision-id to use as BASE. If not specified, will
	407	be auto-selected.
	408	:param other_branch: A branch containing the other revision-id. If
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	409	not supplied, tree.branch is used.
1551.15.74 by Aaron Bentley Textual updates from review	410	:param base_branch: A branch containing the base revision-id. If
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	411	not supplied, other_branch or tree.branch will be used.
	412	:param revision_graph: If you have a revision_graph precomputed, pass
	413	it in, otherwise it will be created for you.
3363.17.15 by Aaron Bentley Update docs	414	:param tree_branch: The branch associated with tree. If not supplied,
3363.17.15 by Aaron Bentley Update docs	415	tree.branch will be used.
1551.15.74 by Aaron Bentley Textual updates from review	416	"""
3363.17.1 by Aaron Bentley Avoid inventory for merge and transform code	417	if tree_branch is None:
	418	tree_branch = tree.branch
	419	merger = Merger(tree_branch, this_tree=tree, pb=pb,
3146.5.3 by Aaron Bentley Avoid retrieving revision graph twice	420	revision_graph=revision_graph)
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	421	if other_branch is None:
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	422	other_branch = tree.branch
1551.15.67 by Aaron Bentley Stop using _merge_helper for merging	423	merger.set_other_revision(other, other_branch)
	424	if base is None:
	425	merger.find_base()
	426	else:
	427	if base_branch is None:
	428	base_branch = other_branch
	429	merger.set_base_revision(base, base_branch)
	430	return merger
	431
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	432	def revision_tree(self, revision_id, branch=None):
	433	if revision_id not in self._cached_trees:
	434	if branch is None:
	435	branch = self.this_branch
	436	try:
	437	tree = self.this_tree.revision_tree(revision_id)
	438	except errors.NoSuchRevisionInTree:
	439	tree = branch.repository.revision_tree(revision_id)
	440	self._cached_trees[revision_id] = tree
	441	return self._cached_trees[revision_id]
	442
2485.8.58 by Vincent Ladeuil merge bzr.dev@1617	443	def _get_tree(self, treespec, possible_transports=None):
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	444	location, revno = treespec
	445	if revno is None:
	446	tree = workingtree.WorkingTree.open_containing(location)[0]
	447	return tree.branch, tree
4721.3.1 by Vincent Ladeuil Cleanup imports.	448	branch = _mod_branch.Branch.open_containing(
4721.3.1 by Vincent Ladeuil Cleanup imports.	449	location, possible_transports)[0]
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	450	if revno == -1:
	451	revision_id = branch.last_revision()
	452	else:
	453	revision_id = branch.get_rev_id(revno)
4721.3.1 by Vincent Ladeuil Cleanup imports.	454	revision_id = _mod_revision.ensure_null(revision_id)
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	455	return branch, self.revision_tree(revision_id, branch)
1185.12.83 by Aaron Bentley Preliminary weave merge support	456
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	457	def set_interesting_files(self, file_list):
2590.2.7 by Aaron Bentley Misc cleanup	458	self.interesting_files = file_list
1457.1.8 by Robert Collins Replace the WorkingTree.revert method algorithm with a call to merge_inner.	459
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	460	def set_pending(self):
4721.3.2 by Vincent Ladeuil Simplify mutable_tree.has_changes() and update call sites.	461	if (not self.base_is_ancestor or not self.base_is_other_ancestor
	462	or self.other_rev_id is None):
1185.12.77 by Aaron Bentley Prevented all ancestors from being marked as pending merges	463	return
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	464	self._add_parent()
	465
	466	def _add_parent(self):
	467	new_parents = self.this_tree.get_parent_ids() + [self.other_rev_id]
2590.2.20 by Aaron Bentley Fix handling of ghost base trees	468	new_parent_trees = []
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	469	operation = cleanup.OperationWithCleanups(
	470	self.this_tree.set_parent_trees)
2590.2.20 by Aaron Bentley Fix handling of ghost base trees	471	for revision_id in new_parents:
	472	try:
	473	tree = self.revision_tree(revision_id)
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	474	except errors.NoSuchRevision:
2590.2.20 by Aaron Bentley Fix handling of ghost base trees	475	tree = None
	476	else:
	477	tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	478	operation.add_cleanup(tree.unlock)
2590.2.20 by Aaron Bentley Fix handling of ghost base trees	479	new_parent_trees.append((revision_id, tree))
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	480	operation.run_simple(new_parent_trees, allow_leftmost_as_ghost=True)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	481
2485.8.37 by Vincent Ladeuil Fix merge multiple connections. Test suite not passing (sftp	482	def set_other(self, other_revision, possible_transports=None):
1979.2.1 by Robert Collins (robertc) adds a convenience method "merge_from_branch" to WorkingTree.	483	"""Set the revision and tree to merge from.
	484
	485	This sets the other_tree, other_rev_id, other_basis attributes.
	486
	487	:param other_revision: The [path, revision] list to merge from.
	488	"""
2485.8.58 by Vincent Ladeuil merge bzr.dev@1617	489	self.other_branch, self.other_tree = self._get_tree(other_revision,
2485.8.58 by Vincent Ladeuil merge bzr.dev@1617	490	possible_transports)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	491	if other_revision[1] == -1:
2598.5.4 by Aaron Bentley Restore original Branch.last_revision behavior, fix bits that care	492	self.other_rev_id = _mod_revision.ensure_null(
	493	self.other_branch.last_revision())
2598.5.1 by Aaron Bentley Start eliminating the use of None to indicate null revision	494	if _mod_revision.is_null(self.other_rev_id):
4721.3.1 by Vincent Ladeuil Cleanup imports.	495	raise errors.NoCommits(self.other_branch)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	496	self.other_basis = self.other_rev_id
	497	elif other_revision[1] is not None:
2100.3.31 by Aaron Bentley Merged bzr.dev (17 tests failing)	498	self.other_rev_id = self.other_branch.get_rev_id(other_revision[1])
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	499	self.other_basis = self.other_rev_id
	500	else:
	501	self.other_rev_id = None
2100.3.31 by Aaron Bentley Merged bzr.dev (17 tests failing)	502	self.other_basis = self.other_branch.last_revision()
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	503	if self.other_basis is None:
4721.3.1 by Vincent Ladeuil Cleanup imports.	504	raise errors.NoCommits(self.other_branch)
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	505	if self.other_rev_id is not None:
	506	self._cached_trees[self.other_rev_id] = self.other_tree
6388.1.2 by Jelmer Vernooij Fix formatting.	507	self._maybe_fetch(self.other_branch, self.this_branch, self.other_basis)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	508
2100.3.29 by Aaron Bentley Get merge working initially	509	def set_other_revision(self, revision_id, other_branch):
	510	"""Set 'other' based on a branch and revision id
	511
	512	:param revision_id: The revision to use for a tree
	513	:param other_branch: The branch containing this tree
	514	"""
	515	self.other_rev_id = revision_id
	516	self.other_branch = other_branch
2590.2.19 by Aaron Bentley Avoid fetch within a repository	517	self._maybe_fetch(other_branch, self.this_branch, self.other_rev_id)
2100.3.29 by Aaron Bentley Get merge working initially	518	self.other_tree = self.revision_tree(revision_id)
	519	self.other_basis = revision_id
	520
2520.4.110 by Aaron Bentley Implement cherrypick support for merge directives	521	def set_base_revision(self, revision_id, branch):
	522	"""Set 'base' based on a branch and revision id
	523
	524	:param revision_id: The revision to use for a tree
	525	:param branch: The branch containing this tree
	526	"""
	527	self.base_rev_id = revision_id
	528	self.base_branch = branch
2520.4.132 by Aaron Bentley Merge from bzr.dev	529	self._maybe_fetch(branch, self.this_branch, revision_id)
2520.4.110 by Aaron Bentley Implement cherrypick support for merge directives	530	self.base_tree = self.revision_tree(revision_id)
2520.4.132 by Aaron Bentley Merge from bzr.dev	531
2590.2.19 by Aaron Bentley Avoid fetch within a repository	532	def _maybe_fetch(self, source, target, revision_id):
2665.5.2 by Aaron Bentley Switch commit and merge to Repository.has_same_location	533	if not source.repository.has_same_location(target.repository):
5741.1.9 by Jelmer Vernooij Remove fetch_tags argument.	534	target.fetch(source, revision_id)
2520.4.110 by Aaron Bentley Implement cherrypick support for merge directives	535
1185.82.25 by Aaron Bentley Added changeset-merging functionality	536	def find_base(self):
4721.3.1 by Vincent Ladeuil Cleanup imports.	537	revisions = [_mod_revision.ensure_null(self.this_basis),
	538	_mod_revision.ensure_null(self.other_basis)]
	539	if _mod_revision.NULL_REVISION in revisions:
	540	self.base_rev_id = _mod_revision.NULL_REVISION
3514.4.36 by John Arbash Meinel Optimizing how we extracted multiple trees left a path that didn't create a base_tree.	541	self.base_tree = self.revision_tree(self.base_rev_id)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	542	self._is_criss_cross = False
2590.2.22 by Aaron Bentley Remove cruft	543	else:
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	544	lcas = self.revision_graph.find_lca(revisions[0], revisions[1])
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	545	self._is_criss_cross = False
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	546	if len(lcas) == 0:
4721.3.1 by Vincent Ladeuil Cleanup imports.	547	self.base_rev_id = _mod_revision.NULL_REVISION
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	548	elif len(lcas) == 1:
	549	self.base_rev_id = list(lcas)[0]
	550	else: # len(lcas) > 1
5540.1.3 by Gary van der Merwe Make merge correctly locate a lca where there is a criss-cross merge of a new root.	551	self._is_criss_cross = True
3514.4.23 by John Arbash Meinel Handle when there are more than 2 LCAs while searching for the unique lca.	552	if len(lcas) > 2:
	553	# find_unique_lca can only handle 2 nodes, so we have to
	554	# start back at the beginning. It is a shame to traverse
	555	# the graph again, but better than re-implementing
	556	# find_unique_lca.
	557	self.base_rev_id = self.revision_graph.find_unique_lca(
	558	revisions[0], revisions[1])
	559	else:
	560	self.base_rev_id = self.revision_graph.find_unique_lca(
	561	*lcas)
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	562	sorted_lca_keys = self.revision_graph.find_merge_order(
5540.1.3 by Gary van der Merwe Make merge correctly locate a lca where there is a criss-cross merge of a new root.	563	revisions[0], lcas)
	564	if self.base_rev_id == _mod_revision.NULL_REVISION:
	565	self.base_rev_id = sorted_lca_keys[0]
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	566
4721.3.1 by Vincent Ladeuil Cleanup imports.	567	if self.base_rev_id == _mod_revision.NULL_REVISION:
4721.3.1 by Vincent Ladeuil Cleanup imports.	568	raise errors.UnrelatedBranches()
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	569	if self._is_criss_cross:
4721.3.1 by Vincent Ladeuil Cleanup imports.	570	trace.warning('Warning: criss-cross merge encountered. See bzr'
	571	' help criss-cross.')
	572	trace.mutter('Criss-cross lcas: %r' % lcas)
5540.1.7 by Gary van der Merwe Add mutter for when we cant find a unique lca, and what revision we used as a base_rev_id.	573	if self.base_rev_id in lcas:
	574	trace.mutter('Unable to find unique lca. '
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	575	'Fallback %r as best option.'
	576	% self.base_rev_id)
5540.1.6 by Gary van der Merwe We just need a set for this.	577	interesting_revision_ids = set(lcas)
5540.1.6 by Gary van der Merwe We just need a set for this.	578	interesting_revision_ids.add(self.base_rev_id)
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	579	interesting_trees = dict((t.get_revision_id(), t)
	580	for t in self.this_branch.repository.revision_trees(
	581	interesting_revision_ids))
	582	self._cached_trees.update(interesting_trees)
5540.1.3 by Gary van der Merwe Make merge correctly locate a lca where there is a criss-cross merge of a new root.	583	if self.base_rev_id in lcas:
	584	self.base_tree = interesting_trees[self.base_rev_id]
	585	else:
	586	self.base_tree = interesting_trees.pop(self.base_rev_id)
3514.4.13 by John Arbash Meinel Switch the lca_trees to be in 'find_merge_order'.	587	self._lca_trees = [interesting_trees[key]
	588	for key in sorted_lca_keys]
3514.4.2 by John Arbash Meinel Extract the lca trees and the base tree when we find a criss-cross	589	else:
	590	self.base_tree = self.revision_tree(self.base_rev_id)
2590.2.13 by Aaron Bentley Make find_base implement the base_finding code	591	self.base_is_ancestor = True
2590.2.18 by Aaron Bentley Merge is_ancestor fix	592	self.base_is_other_ancestor = True
4721.3.1 by Vincent Ladeuil Cleanup imports.	593	trace.mutter('Base revid: %r' % self.base_rev_id)
1185.82.25 by Aaron Bentley Added changeset-merging functionality	594
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	595	def set_base(self, base_revision):
1979.2.1 by Robert Collins (robertc) adds a convenience method "merge_from_branch" to WorkingTree.	596	"""Set the base revision to use for the merge.
	597
	598	:param base_revision: A 2-list containing a path and revision number.
	599	"""
4721.3.1 by Vincent Ladeuil Cleanup imports.	600	trace.mutter("doing merge() with no base_revision specified")
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	601	if base_revision == [None, None]:
2590.2.13 by Aaron Bentley Make find_base implement the base_finding code	602	self.find_base()
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	603	else:
2590.2.11 by Aaron Bentley Aggressively cache trees, use dirstate. re-mplement _add_parent.	604	base_branch, self.base_tree = self._get_tree(base_revision)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	605	if base_revision[1] == -1:
	606	self.base_rev_id = base_branch.last_revision()
	607	elif base_revision[1] is None:
2598.5.3 by Aaron Bentley Push NULL_REVISION deeper	608	self.base_rev_id = _mod_revision.NULL_REVISION
493 by Martin Pool - Merge aaron's merge command	609	else:
2598.5.3 by Aaron Bentley Push NULL_REVISION deeper	610	self.base_rev_id = _mod_revision.ensure_null(
2598.5.3 by Aaron Bentley Push NULL_REVISION deeper	611	base_branch.get_rev_id(base_revision[1]))
2590.2.19 by Aaron Bentley Avoid fetch within a repository	612	self._maybe_fetch(base_branch, self.this_branch, self.base_rev_id)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	613
3008.1.8 by Michael Hudson extract merger creation into a method	614	def make_merger(self):
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	615	kwargs = {'working_tree': self.this_tree, 'this_tree': self.this_tree,
2255.2.31 by Robert Collins Work in progress to make merge_inner work with dirstate trees.	616	'other_tree': self.other_tree,
1551.2.32 by Aaron Bentley Handle progress phases more nicely in merge	617	'interesting_ids': self.interesting_ids,
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	618	'interesting_files': self.interesting_files,
4961.2.20 by Martin Pool Resolve conflicts with trunk	619	'this_branch': self.this_branch,
6410.1.1 by Jelmer Vernooij Add other_branch argument to Merge3Merger.	620	'other_branch': self.other_branch,
3008.1.11 by Michael Hudson restore the default behaviour of Merge3Merger.__init__().	621	'do_merge': False}
1534.7.84 by Aaron Bentley Added reprocess support, support for varying merge types	622	if self.merge_type.requires_base:
	623	kwargs['base_tree'] = self.base_tree
1534.7.137 by Aaron Bentley Avoided generating a new tree for every weave merge	624	if self.merge_type.supports_reprocess:
	625	kwargs['reprocess'] = self.reprocess
	626	elif self.reprocess:
4721.3.1 by Vincent Ladeuil Cleanup imports.	627	raise errors.BzrError(
	628	"Conflict reduction is not supported for merge"
	629	" type %s." % self.merge_type)
1534.7.137 by Aaron Bentley Avoided generating a new tree for every weave merge	630	if self.merge_type.supports_show_base:
	631	kwargs['show_base'] = self.show_base
	632	elif self.show_base:
4721.3.1 by Vincent Ladeuil Cleanup imports.	633	raise errors.BzrError("Showing base is not supported for this"
4721.3.1 by Vincent Ladeuil Cleanup imports.	634	" merge type. %s" % self.merge_type)
3062.2.7 by Aaron Bentley Prevent reverse cherry-picking with weave	635	if (not getattr(self.merge_type, 'supports_reverse_cherrypick', True)
	636	and not self.base_is_other_ancestor):
	637	raise errors.CannotReverseCherrypick()
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	638	if self.merge_type.supports_cherrypick:
3062.2.9 by Aaron Bentley Don't use the base if not cherrypicking	639	kwargs['cherrypick'] = (not self.base_is_ancestor or
	640	not self.base_is_other_ancestor)
3514.4.4 by John Arbash Meinel Test that the lca_trees are passed down to the Merger object when appropriate.	641	if self._is_criss_cross and getattr(self.merge_type,
	642	'supports_lca_trees', False):
	643	kwargs['lca_trees'] = self._lca_trees
4961.2.11 by Martin Pool Pull out pbs and ProgressPhases stored in object state; just use them in single functions	644	return self.merge_type(pb=None,
3008.1.8 by Michael Hudson extract merger creation into a method	645	change_reporter=self.change_reporter,
	646	**kwargs)
	647
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	648	def _do_merge_to(self):
	649	merge = self.make_merger()
4273.1.9 by Aaron Bentley Cleanup	650	if self.other_branch is not None:
4273.1.9 by Aaron Bentley Cleanup	651	self.other_branch.update_references(self.this_branch)
6388.1.4 by Jelmer Vernooij Fix tests.	652	for hook in Merger.hooks['pre_merge']:
6388.1.4 by Jelmer Vernooij Fix tests.	653	hook(merge)
3619.6.4 by Mark Hammond do_merge gets one 'finally' per lock so locks always released on failure.	654	merge.do_merge()
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	655	for hook in Merger.hooks['post_merge']:
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	656	hook(merge)
3619.6.4 by Mark Hammond do_merge gets one 'finally' per lock so locks always released on failure.	657	if self.recurse == 'down':
	658	for relpath, file_id in self.this_tree.iter_references():
	659	sub_tree = self.this_tree.get_nested_tree(file_id, relpath)
	660	other_revision = self.other_tree.get_reference_revision(
	661	file_id, relpath)
	662	if other_revision == sub_tree.last_revision():
	663	continue
	664	sub_merge = Merger(sub_tree.branch, this_tree=sub_tree)
	665	sub_merge.merge_type = self.merge_type
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	666	other_branch = self.other_branch.reference_parent(file_id,
	667	relpath)
3619.6.4 by Mark Hammond do_merge gets one 'finally' per lock so locks always released on failure.	668	sub_merge.set_other_revision(other_revision, other_branch)
	669	base_revision = self.base_tree.get_reference_revision(file_id)
	670	sub_merge.base_tree = \
	671	sub_tree.branch.repository.revision_tree(base_revision)
	672	sub_merge.base_rev_id = base_revision
	673	sub_merge.do_merge()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	674	return merge
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	675
3008.1.8 by Michael Hudson extract merger creation into a method	676	def do_merge(self):
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	677	operation = cleanup.OperationWithCleanups(self._do_merge_to)
2255.2.50 by John Arbash Meinel merge only needs a lock_tree_write() on the working tree, not a full lock_write()	678	self.this_tree.lock_tree_write()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	679	operation.add_cleanup(self.this_tree.unlock)
	680	if self.base_tree is not None:
	681	self.base_tree.lock_read()
	682	operation.add_cleanup(self.base_tree.unlock)
	683	if self.other_tree is not None:
	684	self.other_tree.lock_read()
	685	operation.add_cleanup(self.other_tree.unlock)
	686	merge = operation.run_simple()
1534.7.151 by Aaron Bentley Fixed all changes applied successfully	687	if len(merge.cooked_conflicts) == 0:
4721.3.1 by Vincent Ladeuil Cleanup imports.	688	if not self.ignore_zero and not trace.is_quiet():
6138.3.4 by Jonathan Riddell add gettext() to uses of trace.note()	689	trace.note(gettext("All changes applied successfully."))
1534.7.141 by Aaron Bentley Added conflict reporting	690	else:
6138.3.4 by Jonathan Riddell add gettext() to uses of trace.note()	691	trace.note(gettext("%d conflicts encountered.")
4721.3.1 by Vincent Ladeuil Cleanup imports.	692	% len(merge.cooked_conflicts))
1534.7.141 by Aaron Bentley Added conflict reporting	693
1534.7.134 by Aaron Bentley Hid raw conflicts	694	return len(merge.cooked_conflicts)
1185.12.76 by Aaron Bentley Refactored merge and merge_inner to use Merger	695
1545.2.4 by Aaron Bentley PEP8 fixes	696
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	697	class _InventoryNoneEntry(object):
	698	"""This represents an inventory entry which isn't there.
	699
	700	It simplifies the merging logic if we always have an InventoryEntry, even
	701	if it isn't actually present
	702	"""
	703	executable = None
	704	kind = None
	705	name = None
	706	parent_id = None
	707	revision = None
	708	symlink_target = None
	709	text_sha1 = None
	710
	711	_none_entry = _InventoryNoneEntry()
	712
	713
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	714	class Merge3Merger(object):
1534.7.167 by Aaron Bentley PEP8 and comment cleanups	715	"""Three-way merger that uses the merge3 text merger"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	716	requires_base = True
	717	supports_reprocess = True
	718	supports_show_base = True
	719	history_based = False
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	720	supports_cherrypick = True
3062.2.7 by Aaron Bentley Prevent reverse cherry-picking with weave	721	supports_reverse_cherrypick = True
2590.2.7 by Aaron Bentley Misc cleanup	722	winner_idx = {"this": 2, "other": 1, "conflict": 1}
3514.4.4 by John Arbash Meinel Test that the lca_trees are passed down to the Merger object when appropriate.	723	supports_lca_trees = True
1534.7.167 by Aaron Bentley PEP8 and comment cleanups	724
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	725	def __init__(self, working_tree, this_tree, base_tree, other_tree,
1558.2.2 by Aaron Bentley Make remerge honour interesting-ids	726	interesting_ids=None, reprocess=False, show_base=False,
4961.2.9 by Martin Pool Rip out most remaining uses of DummyProgressBar	727	pb=None, pp=None, change_reporter=None,
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	728	interesting_files=None, do_merge=True,
6410.1.1 by Jelmer Vernooij Add other_branch argument to Merge3Merger.	729	cherrypick=False, lca_trees=None, this_branch=None,
	730	other_branch=None):
2590.2.10 by Aaron Bentley Updates from review	731	"""Initialize the merger object and perform the merge.
	732
	733	:param working_tree: The working tree to apply the merge to
	734	:param this_tree: The local tree in the merge operation
	735	:param base_tree: The common tree in the merge operation
4031.3.1 by Frank Aspell Fixing various typos	736	:param other_tree: The other tree to merge changes from
5162.3.1 by Aaron Bentley Fix switch/merge when a ConfigurableFileMerger is used.	737	:param this_branch: The branch associated with this_tree. Defaults to
	738	this_tree.branch if not supplied.
6410.1.1 by Jelmer Vernooij Add other_branch argument to Merge3Merger.	739	:param other_branch: The branch associated with other_tree, if any.
2590.2.10 by Aaron Bentley Updates from review	740	:param interesting_ids: The file_ids of files that should be
	741	participate in the merge. May not be combined with
	742	interesting_files.
	743	:param: reprocess If True, perform conflict-reduction processing.
	744	:param show_base: If True, show the base revision in text conflicts.
	745	(incompatible with reprocess)
4961.2.9 by Martin Pool Rip out most remaining uses of DummyProgressBar	746	:param pb: ignored
2590.2.10 by Aaron Bentley Updates from review	747	:param pp: A ProgressPhase object
	748	:param change_reporter: An object that should report changes made
	749	:param interesting_files: The tree-relative paths of files that should
	750	participate in the merge. If these paths refer to directories,
	751	the contents of those directories will also be included. May not
	752	be combined with interesting_ids. If neither interesting_files nor
	753	interesting_ids is specified, all files may participate in the
	754	merge.
3514.4.4 by John Arbash Meinel Test that the lca_trees are passed down to the Merger object when appropriate.	755	:param lca_trees: Can be set to a dictionary of {revision_id:rev_tree}
	756	if the ancestry was found to include a criss-cross merge.
	757	Otherwise should be None.
2590.2.10 by Aaron Bentley Updates from review	758	"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	759	object.__init__(self)
3376.2.4 by Martin Pool Remove every assert statement from bzrlib!	760	if interesting_files is not None and interesting_ids is not None:
	761	raise ValueError(
	762	'specify either interesting_ids or interesting_files')
5162.3.1 by Aaron Bentley Fix switch/merge when a ConfigurableFileMerger is used.	763	if this_branch is None:
	764	this_branch = this_tree.branch
2590.2.4 by Aaron Bentley Move entry generation to a helper	765	self.interesting_ids = interesting_ids
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	766	self.interesting_files = interesting_files
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	767	self.working_tree = working_tree
	768	self.this_tree = this_tree
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	769	self.base_tree = base_tree
	770	self.other_tree = other_tree
4869.3.27 by Andrew Bennetts Move news_merge plugin from contrib to bzrlib/plugins, change it to be enabled via a 'news_merge_files' config option, move more code out of the __init__ to minimise overhead, and add lots of docstrings, add NEWS entry.	771	self.this_branch = this_branch
6410.1.1 by Jelmer Vernooij Add other_branch argument to Merge3Merger.	772	self.other_branch = other_branch
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	773	self._raw_conflicts = []
	774	self.cooked_conflicts = []
	775	self.reprocess = reprocess
	776	self.show_base = show_base
3514.4.4 by John Arbash Meinel Test that the lca_trees are passed down to the Merger object when appropriate.	777	self._lca_trees = lca_trees
3514.4.37 by John Arbash Meinel Tests pass when using _entries_lca as the default algorithm.	778	# Uncommenting this will change the default algorithm to always use
	779	# _entries_lca. This can be useful for running the test suite and
	780	# making sure we haven't missed any corner cases.
3514.4.34 by John Arbash Meinel Handle symlinks properly when objects are not RevisionTrees	781	# if lca_trees is None:
	782	# self._lca_trees = [self.base_tree]
1551.11.9 by Aaron Bentley Apply change reporting to merge	783	self.change_reporter = change_reporter
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	784	self.cherrypick = cherrypick
3008.1.11 by Michael Hudson restore the default behaviour of Merge3Merger.__init__().	785	if do_merge:
	786	self.do_merge()
4961.2.12 by Martin Pool Further pb/pp removals	787	if pp is not None:
	788	warnings.warn("pp argument to Merge3Merger is deprecated")
	789	if pb is not None:
	790	warnings.warn("pb argument to Merge3Merger is deprecated")
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	791
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	792	def do_merge(self):
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	793	operation = cleanup.OperationWithCleanups(self._do_merge)
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	794	self.working_tree.lock_tree_write()
	795	operation.add_cleanup(self.working_tree.unlock)
	796	self.this_tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	797	operation.add_cleanup(self.this_tree.unlock)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	798	self.base_tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	799	operation.add_cleanup(self.base_tree.unlock)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	800	self.other_tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	801	operation.add_cleanup(self.other_tree.unlock)
	802	operation.run()
	803
	804	def _do_merge(self, operation):
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	805	self.tt = transform.TreeTransform(self.working_tree, None)
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	806	operation.add_cleanup(self.tt.finalize)
	807	self._compute_transform()
	808	results = self.tt.apply(no_conflicts=True)
	809	self.write_modified(results)
5031.1.3 by Andrew Bennetts Fix syntax error from bad conflict resolution.	810	try:
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	811	self.working_tree.add_conflicts(self.cooked_conflicts)
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	812	except errors.UnsupportedOperation:
	813	pass
1534.7.192 by Aaron Bentley Record hashes produced by merges	814
3008.1.9 by Michael Hudson wanton hacking that lets me write an efficient version of get_diff_as_merged	815	def make_preview_transform(self):
5753.2.2 by Jelmer Vernooij Remove some unnecessary imports, clean up lazy imports.	816	operation = cleanup.OperationWithCleanups(self._make_preview_transform)
3008.1.9 by Michael Hudson wanton hacking that lets me write an efficient version of get_diff_as_merged	817	self.base_tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	818	operation.add_cleanup(self.base_tree.unlock)
3008.1.9 by Michael Hudson wanton hacking that lets me write an efficient version of get_diff_as_merged	819	self.other_tree.lock_read()
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	820	operation.add_cleanup(self.other_tree.unlock)
	821	return operation.run_simple()
	822
	823	def _make_preview_transform(self):
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	824	self.tt = transform.TransformPreview(self.working_tree)
4797.16.1 by Andrew Bennetts Replace many try/finally blocks in merge.py with more robust OperationWithCleanups.	825	self._compute_transform()
3008.1.9 by Michael Hudson wanton hacking that lets me write an efficient version of get_diff_as_merged	826	return self.tt
	827
3008.1.21 by Aaron Bentley Make compute_transform private, test make_preview_transform	828	def _compute_transform(self):
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	829	if self._lca_trees is None:
	830	entries = self._entries3()
	831	resolver = self._three_way
	832	else:
	833	entries = self._entries_lca()
	834	resolver = self._lca_multi_way
6282.3.1 by Vincent Ladeuil First cut at a working plugin to avoid conflicts in .po files by shelling out to msgmerge.	835	# Prepare merge hooks
	836	factories = Merger.hooks['merge_file_content']
	837	# One hook for each registered one plus our default merger
	838	hooks = [factory(self) for factory in factories] + [self]
	839	self.active_hooks = [hook for hook in hooks if hook is not None]
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	840	child_pb = ui.ui_factory.nested_progress_bar()
	841	try:
	842	for num, (file_id, changed, parents3, names3,
	843	executable3) in enumerate(entries):
6282.3.1 by Vincent Ladeuil First cut at a working plugin to avoid conflicts in .po files by shelling out to msgmerge.	844	# Try merging each entry
	845	child_pb.update(gettext('Preparing file merge'),
	846	num, len(entries))
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	847	self._merge_names(file_id, parents3, names3, resolver=resolver)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	848	if changed:
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	849	file_status = self._do_merge_contents(file_id)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	850	else:
	851	file_status = 'unmodified'
	852	self._merge_executable(file_id,
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	853	executable3, file_status, resolver=resolver)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	854	finally:
	855	child_pb.finished()
5993.2.4 by Jelmer Vernooij Remove feature flag.	856	self.tt.fixup_new_roots()
5246.2.33 by Andrew Bennetts Rename _finish_transform to _finish_computing_transform.	857	self._finish_computing_transform()
5246.2.4 by Andrew Bennetts Remove a little bit of duplication.	858
5246.2.33 by Andrew Bennetts Rename _finish_transform to _finish_computing_transform.	859	def _finish_computing_transform(self):
5246.2.4 by Andrew Bennetts Remove a little bit of duplication.	860	"""Finalize the transform and report the changes.
	861
	862	This is the second half of _compute_transform.
	863	"""
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	864	child_pb = ui.ui_factory.nested_progress_bar()
	865	try:
4721.3.1 by Vincent Ladeuil Cleanup imports.	866	fs_conflicts = transform.resolve_conflicts(self.tt, child_pb,
4721.3.1 by Vincent Ladeuil Cleanup imports.	867	lambda t, c: transform.conflict_pass(t, c, self.other_tree))
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	868	finally:
	869	child_pb.finished()
	870	if self.change_reporter is not None:
	871	from bzrlib import delta
	872	delta.report_changes(
3254.1.1 by Aaron Bentley Make Tree.iter_changes a public method	873	self.tt.iter_changes(), self.change_reporter)
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	874	self.cook_conflicts(fs_conflicts)
	875	for conflict in self.cooked_conflicts:
5898.1.6 by Martin Avoid implicit str casting in trace methods by calling unicode() on conflict objects first	876	trace.warning(unicode(conflict))
3008.1.6 by Michael Hudson chop up Merge3Merger.__init__ into pieces	877
2590.2.4 by Aaron Bentley Move entry generation to a helper	878	def _entries3(self):
2590.2.7 by Aaron Bentley Misc cleanup	879	"""Gather data about files modified between three trees.
	880
	881	Return a list of tuples of file_id, changed, parents3, names3,
	882	executable3. changed is a boolean indicating whether the file contents
	883	or kind were changed. parents3 is a tuple of parent ids for base,
	884	other and this. names3 is a tuple of names for base, other and this.
	885	executable3 is a tuple of execute-bit values for base, other and this.
	886	"""
2590.2.4 by Aaron Bentley Move entry generation to a helper	887	result = []
3254.1.1 by Aaron Bentley Make Tree.iter_changes a public method	888	iterator = self.other_tree.iter_changes(self.base_tree,
5783.2.1 by John Arbash Meinel Remove the 'include_unchanged=True' from iter_changes.	889	specific_files=self.interesting_files,
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	890	extra_trees=[self.this_tree])
3363.17.1 by Aaron Bentley Avoid inventory for merge and transform code	891	this_entries = dict((e.file_id, e) for p, e in
	892	self.this_tree.iter_entries_by_dir(
	893	self.interesting_ids))
2590.2.4 by Aaron Bentley Move entry generation to a helper	894	for (file_id, paths, changed, versioned, parents, names, kind,
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	895	executable) in iterator:
2590.2.4 by Aaron Bentley Move entry generation to a helper	896	if (self.interesting_ids is not None and
	897	file_id not in self.interesting_ids):
	898	continue
3363.17.1 by Aaron Bentley Avoid inventory for merge and transform code	899	entry = this_entries.get(file_id)
	900	if entry is not None:
2590.2.4 by Aaron Bentley Move entry generation to a helper	901	this_name = entry.name
	902	this_parent = entry.parent_id
	903	this_executable = entry.executable
	904	else:
	905	this_name = None
	906	this_parent = None
	907	this_executable = None
	908	parents3 = parents + (this_parent,)
	909	names3 = names + (this_name,)
	910	executable3 = executable + (this_executable,)
	911	result.append((file_id, changed, parents3, names3, executable3))
	912	return result
	913
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	914	def _entries_lca(self):
	915	"""Gather data about files modified between multiple trees.
	916
	917	This compares OTHER versus all LCA trees, and for interesting entries,
	918	it then compares with THIS and BASE.
	919
	920	For the multi-valued entries, the format will be (BASE, [lca1, lca2])
5891.1.2 by Andrew Bennetts Fix a bunch of docstring formatting nits, making pydoctor a bit happier.	921
	922	:return: [(file_id, changed, parents, names, executable)], where:
	923
	924	* file_id: Simple file_id of the entry
	925	* changed: Boolean, True if the kind or contents changed else False
	926	* parents: ((base, [parent_id, in, lcas]), parent_id_other,
	927	parent_id_this)
	928	* names: ((base, [name, in, lcas]), name_in_other, name_in_this)
	929	* executable: ((base, [exec, in, lcas]), exec_in_other,
	930	exec_in_this)
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	931	"""
3514.4.24 by John Arbash Meinel Implement support for 'interesting_files' and 'interesting_ids' for _entries_lca	932	if self.interesting_files is not None:
	933	lookup_trees = [self.this_tree, self.base_tree]
	934	lookup_trees.extend(self._lca_trees)
	935	# I think we should include the lca trees as well
	936	interesting_ids = self.other_tree.paths2ids(self.interesting_files,
	937	lookup_trees)
	938	else:
	939	interesting_ids = self.interesting_ids
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	940	result = []
3514.4.13 by John Arbash Meinel Switch the lca_trees to be in 'find_merge_order'.	941	walker = _mod_tree.MultiWalker(self.other_tree, self._lca_trees)
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	942
6405.2.10 by Jelmer Vernooij Fix more tests.	943	base_inventory = self.base_tree.root_inventory
6405.2.10 by Jelmer Vernooij Fix more tests.	944	this_inventory = self.this_tree.root_inventory
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	945	for path, file_id, other_ie, lca_values in walker.iter_all():
	946	# Is this modified at all from any of the other trees?
3514.4.15 by John Arbash Meinel Handle when OTHER doesn't have the entry.	947	if other_ie is None:
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	948	other_ie = _none_entry
3514.4.24 by John Arbash Meinel Implement support for 'interesting_files' and 'interesting_ids' for _entries_lca	949	if interesting_ids is not None and file_id not in interesting_ids:
	950	continue
3514.4.15 by John Arbash Meinel Handle when OTHER doesn't have the entry.	951
3514.4.30 by John Arbash Meinel Several updates.	952	# If other_revision is found in any of the lcas, that means this
	953	# node is uninteresting. This is because when merging, if there are
	954	# multiple heads(), we have to create a new node. So if we didn't,
	955	# we know that the ancestry is linear, and that OTHER did not
	956	# modify anything
	957	# See doc/developers/lca_merge_resolution.txt for details
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	958	other_revision = other_ie.revision
3514.4.32 by John Arbash Meinel Add a test for proper behavior when everything is a WT.	959	if other_revision is not None:
	960	# We can't use this shortcut when other_revision is None,
	961	# because it may be None because things are WorkingTrees, and
	962	# not because it is actually None.
	963	is_unmodified = False
	964	for lca_path, ie in lca_values:
	965	if ie is not None and ie.revision == other_revision:
	966	is_unmodified = True
	967	break
	968	if is_unmodified:
	969	continue
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	970
	971	lca_entries = []
	972	for lca_path, lca_ie in lca_values:
	973	if lca_ie is None:
	974	lca_entries.append(_none_entry)
	975	else:
	976	lca_entries.append(lca_ie)
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	977
5967.7.1 by Martin Pool Deprecate __contains__ on Tree and Inventory	978	if base_inventory.has_id(file_id):
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	979	base_ie = base_inventory[file_id]
3514.4.10 by John Arbash Meinel Test the case where BASE is missing a file that is present in THIS, OTHER and all LCAs.	980	else:
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	981	base_ie = _none_entry
	982
5967.7.1 by Martin Pool Deprecate __contains__ on Tree and Inventory	983	if this_inventory.has_id(file_id):
3514.4.11 by John Arbash Meinel Handle when an entry is missing in THIS	984	this_ie = this_inventory[file_id]
	985	else:
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	986	this_ie = _none_entry
3514.4.11 by John Arbash Meinel Handle when an entry is missing in THIS	987
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	988	lca_kinds = []
	989	lca_parent_ids = []
	990	lca_names = []
	991	lca_executable = []
	992	for lca_ie in lca_entries:
	993	lca_kinds.append(lca_ie.kind)
	994	lca_parent_ids.append(lca_ie.parent_id)
	995	lca_names.append(lca_ie.name)
	996	lca_executable.append(lca_ie.executable)
	997
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	998	kind_winner = self._lca_multi_way(
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	999	(base_ie.kind, lca_kinds),
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1000	other_ie.kind, this_ie.kind)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	1001	parent_id_winner = self._lca_multi_way(
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1002	(base_ie.parent_id, lca_parent_ids),
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1003	other_ie.parent_id, this_ie.parent_id)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	1004	name_winner = self._lca_multi_way(
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1005	(base_ie.name, lca_names),
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1006	other_ie.name, this_ie.name)
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1007
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1008	content_changed = True
	1009	if kind_winner == 'this':
	1010	# No kind change in OTHER, see if there are any changes
3948.1.1 by John Arbash Meinel Fix an edge case with deleted files and criss-cross merges.	1011	if other_ie.kind == 'directory':
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1012	if parent_id_winner == 'this' and name_winner == 'this':
	1013	# No change for this directory in OTHER, skip
	1014	continue
	1015	content_changed = False
3948.1.1 by John Arbash Meinel Fix an edge case with deleted files and criss-cross merges.	1016	elif other_ie.kind is None or other_ie.kind == 'file':
3514.4.30 by John Arbash Meinel Several updates.	1017	def get_sha1(ie, tree):
3514.4.35 by John Arbash Meinel Add a test that we only call get_symlink_target if the object should be a symlink.	1018	if ie.kind != 'file':
3514.4.30 by John Arbash Meinel Several updates.	1019	return None
	1020	return tree.get_file_sha1(file_id)
	1021	base_sha1 = get_sha1(base_ie, self.base_tree)
	1022	lca_sha1s = [get_sha1(ie, tree) for ie, tree
	1023	in zip(lca_entries, self._lca_trees)]
	1024	this_sha1 = get_sha1(this_ie, self.this_tree)
	1025	other_sha1 = get_sha1(other_ie, self.other_tree)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	1026	sha1_winner = self._lca_multi_way(
3514.4.30 by John Arbash Meinel Several updates.	1027	(base_sha1, lca_sha1s), other_sha1, this_sha1,
3514.4.30 by John Arbash Meinel Several updates.	1028	allow_overriding_lca=False)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	1029	exec_winner = self._lca_multi_way(
3514.4.22 by John Arbash Meinel Handle executable bit changes as well.	1030	(base_ie.executable, lca_executable),
	1031	other_ie.executable, this_ie.executable)
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1032	if (parent_id_winner == 'this' and name_winner == 'this'
3514.4.22 by John Arbash Meinel Handle executable bit changes as well.	1033	and sha1_winner == 'this' and exec_winner == 'this'):
	1034	# No kind, parent, name, exec, or content change for
	1035	# OTHER, so this node is not considered interesting
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1036	continue
	1037	if sha1_winner == 'this':
	1038	content_changed = False
3514.4.27 by John Arbash Meinel A couple of symlink tests, we need to do more.	1039	elif other_ie.kind == 'symlink':
3514.4.34 by John Arbash Meinel Handle symlinks properly when objects are not RevisionTrees	1040	def get_target(ie, tree):
3514.4.35 by John Arbash Meinel Add a test that we only call get_symlink_target if the object should be a symlink.	1041	if ie.kind != 'symlink':
3514.4.34 by John Arbash Meinel Handle symlinks properly when objects are not RevisionTrees	1042	return None
	1043	return tree.get_symlink_target(file_id)
	1044	base_target = get_target(base_ie, self.base_tree)
	1045	lca_targets = [get_target(ie, tree) for ie, tree
	1046	in zip(lca_entries, self._lca_trees)]
	1047	this_target = get_target(this_ie, self.this_tree)
	1048	other_target = get_target(other_ie, self.other_tree)
3514.4.39 by John Arbash Meinel Use self._lca_multi_way rather than Merge3Merger._lca_multi_way by Aaron's request.	1049	target_winner = self._lca_multi_way(
3514.4.34 by John Arbash Meinel Handle symlinks properly when objects are not RevisionTrees	1050	(base_target, lca_targets),
	1051	other_target, this_target)
3514.4.28 by John Arbash Meinel More symlink tests.	1052	if (parent_id_winner == 'this' and name_winner == 'this'
	1053	and target_winner == 'this'):
	1054	# No kind, parent, name, or symlink target change
	1055	# not interesting
	1056	continue
	1057	if target_winner == 'this':
	1058	content_changed = False
3514.4.33 by John Arbash Meinel Implement support for 'tree-reference'.	1059	elif other_ie.kind == 'tree-reference':
	1060	# The 'changed' information seems to be handled at a higher
	1061	# level. At least, _entries3 returns False for content
	1062	# changed, even when at a new revision_id.
	1063	content_changed = False
	1064	if (parent_id_winner == 'this' and name_winner == 'this'):
	1065	# Nothing interesting
	1066	continue
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1067	else:
	1068	raise AssertionError('unhandled kind: %s' % other_ie.kind)
3514.4.13 by John Arbash Meinel Switch the lca_trees to be in 'find_merge_order'.	1069
	1070	# If we have gotten this far, that means something has changed
3514.4.20 by John Arbash Meinel Use the _lca_multi_way to work out if there is actually a kind/parent/name/content change.	1071	result.append((file_id, content_changed,
	1072	((base_ie.parent_id, lca_parent_ids),
	1073	other_ie.parent_id, this_ie.parent_id),
	1074	((base_ie.name, lca_names),
	1075	other_ie.name, this_ie.name),
	1076	((base_ie.executable, lca_executable),
	1077	other_ie.executable, this_ie.executable)
3514.4.5 by John Arbash Meinel Initial work on _entries_lca.	1078	))
	1079	return result
	1080
1534.7.192 by Aaron Bentley Record hashes produced by merges	1081	def write_modified(self, results):
	1082	modified_hashes = {}
	1083	for path in results.modified_paths:
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	1084	file_id = self.working_tree.path2id(self.working_tree.relpath(path))
1534.7.192 by Aaron Bentley Record hashes produced by merges	1085	if file_id is None:
	1086	continue
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	1087	hash = self.working_tree.get_file_sha1(file_id)
1534.7.192 by Aaron Bentley Record hashes produced by merges	1088	if hash is None:
	1089	continue
	1090	modified_hashes[file_id] = hash
6410.1.2 by Jelmer Vernooij Distinguish working tree and this tree.	1091	self.working_tree.set_merge_modified(modified_hashes)
1534.7.192 by Aaron Bentley Record hashes produced by merges	1092
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1093	@staticmethod
	1094	def parent(entry, file_id):
1534.7.157 by Aaron Bentley Added more docs	1095	"""Determine the parent for a file_id (used as a key method)"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1096	if entry is None:
	1097	return None
	1098	return entry.parent_id
	1099
	1100	@staticmethod
	1101	def name(entry, file_id):
1534.7.157 by Aaron Bentley Added more docs	1102	"""Determine the name for a file_id (used as a key method)"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1103	if entry is None:
	1104	return None
	1105	return entry.name
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1106
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1107	@staticmethod
	1108	def contents_sha1(tree, file_id):
1534.7.157 by Aaron Bentley Added more docs	1109	"""Determine the sha1 of the file contents (used as a key method)."""
5967.7.1 by Martin Pool Deprecate __contains__ on Tree and Inventory	1110	if not tree.has_id(file_id):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1111	return None
	1112	return tree.get_file_sha1(file_id)
	1113
	1114	@staticmethod
	1115	def executable(tree, file_id):
1534.7.157 by Aaron Bentley Added more docs	1116	"""Determine the executability of a file-id (used as a key method)."""
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1117	if not tree.has_id(file_id):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1118	return None
	1119	if tree.kind(file_id) != "file":
	1120	return False
	1121	return tree.is_executable(file_id)
	1122
	1123	@staticmethod
	1124	def kind(tree, file_id):
1534.7.157 by Aaron Bentley Added more docs	1125	"""Determine the kind of a file-id (used as a key method)."""
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1126	if not tree.has_id(file_id):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1127	return None
	1128	return tree.kind(file_id)
	1129
	1130	@staticmethod
2590.2.8 by Aaron Bentley Restore conflict handling changes	1131	def _three_way(base, other, this):
2590.2.8 by Aaron Bentley Restore conflict handling changes	1132	if base == other:
5128.1.1 by Vincent Ladeuil Uncontroversial cleanups, mostly comments	1133	# if 'base == other', either they all agree, or only 'this' has
	1134	# changed.
2590.2.8 by Aaron Bentley Restore conflict handling changes	1135	return 'this'
2590.2.10 by Aaron Bentley Updates from review	1136	elif this not in (base, other):
5128.1.1 by Vincent Ladeuil Uncontroversial cleanups, mostly comments	1137	# 'this' is neither 'base' nor 'other', so both sides changed
2590.2.8 by Aaron Bentley Restore conflict handling changes	1138	return 'conflict'
2590.2.8 by Aaron Bentley Restore conflict handling changes	1139	elif this == other:
5128.1.1 by Vincent Ladeuil Uncontroversial cleanups, mostly comments	1140	# "Ambiguous clean merge" -- both sides have made the same change.
2590.2.8 by Aaron Bentley Restore conflict handling changes	1141	return "this"
2590.2.8 by Aaron Bentley Restore conflict handling changes	1142	else:
5128.1.1 by Vincent Ladeuil Uncontroversial cleanups, mostly comments	1143	# this == base: only other has changed.
2590.2.8 by Aaron Bentley Restore conflict handling changes	1144	return "other"
	1145
	1146	@staticmethod
3514.4.30 by John Arbash Meinel Several updates.	1147	def _lca_multi_way(bases, other, this, allow_overriding_lca=True):
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1148	"""Consider LCAs when determining whether a change has occurred.
	1149
	1150	If LCAS are all identical, this is the same as a _three_way comparison.
	1151
	1152	:param bases: value in (BASE, [LCAS])
	1153	:param other: value in OTHER
	1154	:param this: value in THIS
3514.4.30 by John Arbash Meinel Several updates.	1155	:param allow_overriding_lca: If there is more than one unique lca
	1156	value, allow OTHER to override THIS if it has a new value, and
	1157	THIS only has an lca value, or vice versa. This is appropriate for
	1158	truly scalar values, not as much for non-scalars.
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1159	:return: 'this', 'other', or 'conflict' depending on whether an entry
	1160	changed or not.
	1161	"""
3948.1.7 by Vincent Ladeuil Slight refactoring and test fixing.	1162	# See doc/developers/lca_tree_merging.txt for details about this
3514.4.30 by John Arbash Meinel Several updates.	1163	# algorithm.
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1164	if other == this:
	1165	# Either Ambiguously clean, or nothing was actually changed. We
	1166	# don't really care
	1167	return 'this'
	1168	base_val, lca_vals = bases
	1169	# Remove 'base_val' from the lca_vals, because it is not interesting
	1170	filtered_lca_vals = [lca_val for lca_val in lca_vals
	1171	if lca_val != base_val]
	1172	if len(filtered_lca_vals) == 0:
	1173	return Merge3Merger._three_way(base_val, other, this)
3514.4.30 by John Arbash Meinel Several updates.	1174
	1175	unique_lca_vals = set(filtered_lca_vals)
	1176	if len(unique_lca_vals) == 1:
	1177	return Merge3Merger._three_way(unique_lca_vals.pop(), other, this)
	1178
	1179	if allow_overriding_lca:
	1180	if other in unique_lca_vals:
	1181	if this in unique_lca_vals:
	1182	# Each side picked a different lca, conflict
	1183	return 'conflict'
	1184	else:
	1185	# This has a value which supersedes both lca values, and
	1186	# other only has an lca value
	1187	return 'this'
	1188	elif this in unique_lca_vals:
	1189	# OTHER has a value which supersedes both lca values, and this
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1190	# only has an lca value
3514.4.30 by John Arbash Meinel Several updates.	1191	return 'other'
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1192
5128.1.1 by Vincent Ladeuil Uncontroversial cleanups, mostly comments	1193	# At this point, the lcas disagree, and the tip disagree
3514.4.19 by John Arbash Meinel Add the _lca_multi_way function, and explicit tests.	1194	return 'conflict'
	1195
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1196	def merge_names(self, file_id):
	1197	def get_entry(tree):
6468.2.4 by Jelmer Vernooij Ask for forgiveness, not permission when looking up tree entry.	1198	try:
6405.2.10 by Jelmer Vernooij Fix more tests.	1199	return tree.root_inventory[file_id]
6468.2.4 by Jelmer Vernooij Ask for forgiveness, not permission when looking up tree entry.	1200	except errors.NoSuchId:
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1201	return None
	1202	this_entry = get_entry(self.this_tree)
	1203	other_entry = get_entry(self.other_tree)
	1204	base_entry = get_entry(self.base_tree)
2590.2.1 by Aaron Bentley Start work on merging names based on iter_changes	1205	entries = (base_entry, other_entry, this_entry)
	1206	names = []
	1207	parents = []
	1208	for entry in entries:
	1209	if entry is None:
	1210	names.append(None)
	1211	parents.append(None)
	1212	else:
	1213	names.append(entry.name)
	1214	parents.append(entry.parent_id)
3514.4.40 by John Arbash Meinel Make 'resolver' a required parameter.	1215	return self._merge_names(file_id, parents, names,
	1216	resolver=self._three_way)
2590.2.1 by Aaron Bentley Start work on merging names based on iter_changes	1217
3514.4.40 by John Arbash Meinel Make 'resolver' a required parameter.	1218	def _merge_names(self, file_id, parents, names, resolver):
2590.2.7 by Aaron Bentley Misc cleanup	1219	"""Perform a merge on file_id names and parents"""
2590.2.1 by Aaron Bentley Start work on merging names based on iter_changes	1220	base_name, other_name, this_name = names
	1221	base_parent, other_parent, this_parent = parents
2590.2.2 by Aaron Bentley Do most name merging from iter_changes output	1222
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1223	name_winner = resolver(*names)
2590.2.1 by Aaron Bentley Start work on merging names based on iter_changes	1224
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1225	parent_id_winner = resolver(*parents)
2590.2.2 by Aaron Bentley Do most name merging from iter_changes output	1226	if this_name is None:
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1227	if name_winner == "this":
	1228	name_winner = "other"
	1229	if parent_id_winner == "this":
	1230	parent_id_winner = "other"
	1231	if name_winner == "this" and parent_id_winner == "this":
	1232	return
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1233	if name_winner == 'conflict' or parent_id_winner == 'conflict':
4597.7.18 by Vincent Ladeuil Start addressing Andrew's concerns.	1234	# Creating helpers (.OTHER or .THIS) here cause problems down the
	1235	# road if a ContentConflict needs to be created so we should not do
	1236	# that
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1237	trans_id = self.tt.trans_id_file_id(file_id)
	1238	self._raw_conflicts.append(('path conflict', trans_id, file_id,
	1239	this_parent, this_name,
	1240	other_parent, other_name))
5954.4.2 by Aaron Bentley Support merging into null tree.	1241	if not self.other_tree.has_id(file_id):
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1242	# it doesn't matter whether the result was 'other' or
5954.4.6 by Aaron Bentley Updates from review.	1243	# 'conflict'-- if it has no file id, we leave it alone.
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1244	return
2590.2.7 by Aaron Bentley Misc cleanup	1245	parent_id = parents[self.winner_idx[parent_id_winner]]
5954.4.2 by Aaron Bentley Support merging into null tree.	1246	name = names[self.winner_idx[name_winner]]
5954.4.2 by Aaron Bentley Support merging into null tree.	1247	if parent_id is not None or name is not None:
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1248	# if we get here, name_winner and parent_winner are set to safe
	1249	# values.
5954.4.2 by Aaron Bentley Support merging into null tree.	1250	if parent_id is None and name is not None:
	1251	# if parent_id is None and name is non-None, current file is
	1252	# the tree root.
	1253	if names[self.winner_idx[parent_id_winner]] != '':
	1254	raise AssertionError(
	1255	'File looks like a root, but named %s' %
	1256	names[self.winner_idx[parent_id_winner]])
	1257	parent_trans_id = transform.ROOT_PARENT
	1258	else:
	1259	parent_trans_id = self.tt.trans_id_file_id(parent_id)
	1260	self.tt.adjust_path(name, parent_trans_id,
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1261	self.tt.trans_id_file_id(file_id))
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1262
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	1263	def _do_merge_contents(self, file_id):
3874.2.10 by Vincent Ladeuil Fix typo.	1264	"""Performs a merge on file_id contents."""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1265	def contents_pair(tree):
5967.7.1 by Martin Pool Deprecate __contains__ on Tree and Inventory	1266	if not tree.has_id(file_id):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1267	return (None, None)
	1268	kind = tree.kind(file_id)
	1269	if kind == "file":
	1270	contents = tree.get_file_sha1(file_id)
	1271	elif kind == "symlink":
	1272	contents = tree.get_symlink_target(file_id)
	1273	else:
	1274	contents = None
	1275	return kind, contents
1558.15.3 by Aaron Bentley Handle binary files for diff3 merges	1276
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1277	# See SPOT run. run, SPOT, run.
	1278	# So we're not QUITE repeating ourselves; we do tricky things with
	1279	# file kind...
	1280	base_pair = contents_pair(self.base_tree)
	1281	other_pair = contents_pair(self.other_tree)
3955.2.1 by John Arbash Meinel Change the workings of merge_content to be lca aware.	1282	if self._lca_trees:
3948.1.7 by Vincent Ladeuil Slight refactoring and test fixing.	1283	this_pair = contents_pair(self.this_tree)
3955.2.1 by John Arbash Meinel Change the workings of merge_content to be lca aware.	1284	lca_pairs = [contents_pair(tree) for tree in self._lca_trees]
	1285	winner = self._lca_multi_way((base_pair, lca_pairs), other_pair,
	1286	this_pair, allow_overriding_lca=False)
	1287	else:
3948.1.7 by Vincent Ladeuil Slight refactoring and test fixing.	1288	if base_pair == other_pair:
	1289	winner = 'this'
	1290	else:
	1291	# We delayed evaluating this_pair as long as we can to avoid
	1292	# unnecessary sha1 calculation
	1293	this_pair = contents_pair(self.this_tree)
	1294	winner = self._three_way(base_pair, other_pair, this_pair)
3955.2.1 by John Arbash Meinel Change the workings of merge_content to be lca aware.	1295	if winner == 'this':
	1296	# No interesting changes introduced by OTHER
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1297	return "unmodified"
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1298	# We have a hypothetical conflict, but if we have files, then we
	1299	# can try to merge the content
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1300	trans_id = self.tt.trans_id_file_id(file_id)
6388.1.3 by Jelmer Vernooij Add pre and post merge hooks.	1301	params = MergeFileHookParams(self, file_id, trans_id, this_pair[0],
4869.3.21 by Andrew Bennetts Pass kinds (not pairs) to MergeHookParams.	1302	other_pair[0], winner)
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	1303	hooks = self.active_hooks
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1304	hook_status = 'not_applicable'
	1305	for hook in hooks:
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	1306	hook_status, lines = hook.merge_contents(params)
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1307	if hook_status != 'not_applicable':
	1308	# Don't try any more hooks, this one applies.
4869.3.5 by Andrew Bennetts Hook is invoked for delete vs. change conflicts, and may choose to result in deleting the file.	1309	break
6015.47.8 by Vincent Ladeuil Address some points from gz's review.	1310	# If the merge ends up replacing the content of the file, we get rid of
	1311	# it at the end of this method (this variable is used to track the
	1312	# exceptions to this rule).
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1313	keep_this = False
4869.3.18 by Andrew Bennetts Simplify slightly more.	1314	result = "modified"
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1315	if hook_status == 'not_applicable':
6015.47.5 by Vincent Ladeuil Fix the other half by also producing a conflict but rely on merge to create the appropriate content. This covers the case where a file is modified in THIS but replaced in OTHER	1316	# No merge hook was able to resolve the situation. Two cases exist:
	1317	# a content conflict or a duplicate one.
4869.3.18 by Andrew Bennetts Simplify slightly more.	1318	result = None
4869.3.17 by Andrew Bennetts Remove contents_conflict nested function, replace last callsite with simpler form.	1319	name = self.tt.final_name(trans_id)
	1320	parent_id = self.tt.final_parent(trans_id)
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1321	duplicate = False
6015.47.5 by Vincent Ladeuil Fix the other half by also producing a conflict but rely on merge to create the appropriate content. This covers the case where a file is modified in THIS but replaced in OTHER	1322	inhibit_content_conflict = False
	1323	if params.this_kind is None: # file_id is not in THIS
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1324	# Is the name used for a different file_id ?
	1325	dupe_path = self.other_tree.id2path(file_id)
	1326	this_id = self.this_tree.path2id(dupe_path)
6015.47.5 by Vincent Ladeuil Fix the other half by also producing a conflict but rely on merge to create the appropriate content. This covers the case where a file is modified in THIS but replaced in OTHER	1327	if this_id is not None:
	1328	# Two entries for the same path
	1329	keep_this = True
	1330	# versioning the merged file will trigger a duplicate
	1331	# conflict
	1332	self.tt.version_file(file_id, trans_id)
	1333	transform.create_from_tree(
	1334	self.tt, trans_id, self.other_tree, file_id,
	1335	filter_tree_path=self._get_filter_tree_path(file_id))
	1336	inhibit_content_conflict = True
	1337	elif params.other_kind is None: # file_id is not in OTHER
	1338	# Is the name used for a different file_id ?
	1339	dupe_path = self.this_tree.id2path(file_id)
	1340	other_id = self.other_tree.path2id(dupe_path)
	1341	if other_id is not None:
	1342	# Two entries for the same path again, but here, the other
	1343	# entry will also be merged. We simply inhibit the
	1344	# 'content' conflict creation because we know OTHER will
	1345	# create (or has already created depending on ordering) an
	1346	# entry at the same path. This will trigger a 'duplicate'
	1347	# conflict later.
	1348	keep_this = True
	1349	inhibit_content_conflict = True
	1350	if not inhibit_content_conflict:
	1351	if params.this_kind is not None:
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1352	self.tt.unversion_file(trans_id)
	1353	# This is a contents conflict, because none of the available
	1354	# functions could merge it.
	1355	file_group = self._dump_conflicts(name, parent_id, file_id,
	1356	set_version=True)
	1357	self._raw_conflicts.append(('contents conflict', file_group))
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1358	elif hook_status == 'success':
	1359	self.tt.create_file(lines, trans_id)
	1360	elif hook_status == 'conflicted':
	1361	# XXX: perhaps the hook should be able to provide
	1362	# the BASE/THIS/OTHER files?
	1363	self.tt.create_file(lines, trans_id)
	1364	self._raw_conflicts.append(('text conflict', trans_id))
	1365	name = self.tt.final_name(trans_id)
	1366	parent_id = self.tt.final_parent(trans_id)
4869.3.23 by Andrew Bennetts Remove some confusing code that has no effect.	1367	self._dump_conflicts(name, parent_id, file_id)
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1368	elif hook_status == 'delete':
	1369	self.tt.unversion_file(trans_id)
4869.3.18 by Andrew Bennetts Simplify slightly more.	1370	result = "deleted"
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1371	elif hook_status == 'done':
	1372	# The hook function did whatever it needs to do directly, no
	1373	# further action needed here.
	1374	pass
	1375	else:
4869.3.18 by Andrew Bennetts Simplify slightly more.	1376	raise AssertionError('unknown hook_status: %r' % (hook_status,))
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1377	if not self.this_tree.has_id(file_id) and result == "modified":
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1378	self.tt.version_file(file_id, trans_id)
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1379	if not keep_this:
6015.47.8 by Vincent Ladeuil Address some points from gz's review.	1380	# The merge has been performed and produced a new content, so the
	1381	# old contents should not be retained.
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1382	self.tt.delete_contents(trans_id)
4869.3.18 by Andrew Bennetts Simplify slightly more.	1383	return result
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1384
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1385	def _default_other_winner_merge(self, merge_hook_params):
	1386	"""Replace this contents with other."""
	1387	file_id = merge_hook_params.file_id
	1388	trans_id = merge_hook_params.trans_id
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1389	if self.other_tree.has_id(file_id):
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1390	# OTHER changed the file
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1391	transform.create_from_tree(
	1392	self.tt, trans_id, self.other_tree, file_id,
	1393	filter_tree_path=self._get_filter_tree_path(file_id))
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1394	return 'done', None
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1395	elif self.this_tree.has_id(file_id):
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1396	# OTHER deleted the file
	1397	return 'delete', None
	1398	else:
	1399	raise AssertionError(
	1400	'winner is OTHER, but file_id %r not in THIS or OTHER tree'
	1401	% (file_id,))
	1402
4797.5.1 by Robert Collins Support state on per-file merging to permit more efficient use of configuration data.	1403	def merge_contents(self, merge_hook_params):
	1404	"""Fallback merge logic after user installed hooks."""
	1405	# This function is used in merge hooks as the fallback instance.
	1406	# Perhaps making this function and the functions it calls be a
	1407	# a separate class would be better.
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1408	if merge_hook_params.winner == 'other':
	1409	# OTHER is a straight winner, so replace this contents with other
	1410	return self._default_other_winner_merge(merge_hook_params)
	1411	elif merge_hook_params.is_file_merge():
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1412	# THIS and OTHER are both files, so text merge. Either
	1413	# BASE is a file, or both converted to files, so at least we
	1414	# have agreement that output should be a file.
	1415	try:
	1416	self.text_merge(merge_hook_params.file_id,
	1417	merge_hook_params.trans_id)
	1418	except errors.BinaryFile:
	1419	return 'not_applicable', None
4869.3.16 by Andrew Bennetts Move handling of winner==OTHER case into generic hook path too.	1420	return 'done', None
4869.3.15 by Andrew Bennetts Refactor so that the default text merge is the final hook tried. Other hooks can now invoke it directly via merger.default_text_merge if they wish.	1421	else:
	1422	return 'not_applicable', None
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1423
	1424	def get_lines(self, tree, file_id):
1534.7.157 by Aaron Bentley Added more docs	1425	"""Return the lines in a file, or an empty list."""
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1426	if tree.has_id(file_id):
4708.2.1 by Martin Ensure all files opened by bazaar proper are explicitly closed	1427	return tree.get_file_lines(file_id)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1428	else:
	1429	return []
	1430
	1431	def text_merge(self, file_id, trans_id):
	1432	"""Perform a three-way text merge on a file_id"""
	1433	# it's possible that we got here with base as a different type.
	1434	# if so, we just want two-way text conflicts.
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1435	if self.base_tree.has_id(file_id) and \
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1436	self.base_tree.kind(file_id) == "file":
	1437	base_lines = self.get_lines(self.base_tree, file_id)
	1438	else:
	1439	base_lines = []
	1440	other_lines = self.get_lines(self.other_tree, file_id)
	1441	this_lines = self.get_lines(self.this_tree, file_id)
4721.3.1 by Vincent Ladeuil Cleanup imports.	1442	m3 = merge3.Merge3(base_lines, this_lines, other_lines,
4721.3.1 by Vincent Ladeuil Cleanup imports.	1443	is_cherrypick=self.cherrypick)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1444	start_marker = "!START OF MERGE CONFLICT!" + "I HOPE THIS IS UNIQUE"
	1445	if self.show_base is True:
	1446	base_marker = '\|' * 7
	1447	else:
	1448	base_marker = None
	1449
	1450	def iter_merge3(retval):
	1451	retval["text_conflicts"] = False
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1452	for line in m3.merge_lines(name_a = "TREE",
	1453	name_b = "MERGE-SOURCE",
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1454	name_base = "BASE-REVISION",
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1455	start_marker=start_marker,
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1456	base_marker=base_marker,
	1457	reprocess=self.reprocess):
	1458	if line.startswith(start_marker):
	1459	retval["text_conflicts"] = True
	1460	yield line.replace(start_marker, '<' * 7)
	1461	else:
	1462	yield line
	1463	retval = {}
	1464	merge3_iterator = iter_merge3(retval)
	1465	self.tt.create_file(merge3_iterator, trans_id)
	1466	if retval["text_conflicts"] is True:
	1467	self._raw_conflicts.append(('text conflict', trans_id))
	1468	name = self.tt.final_name(trans_id)
	1469	parent_id = self.tt.final_parent(trans_id)
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1470	file_group = self._dump_conflicts(name, parent_id, file_id,
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1471	this_lines, base_lines,
	1472	other_lines)
	1473	file_group.append(trans_id)
	1474
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1475
	1476	def _get_filter_tree_path(self, file_id):
6015.47.8 by Vincent Ladeuil Address some points from gz's review.	1477	if self.this_tree.supports_content_filtering():
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1478	# We get the path from the working tree if it exists.
	1479	# That fails though when OTHER is adding a file, so
	1480	# we fall back to the other tree to find the path if
	1481	# it doesn't exist locally.
	1482	try:
6015.47.8 by Vincent Ladeuil Address some points from gz's review.	1483	return self.this_tree.id2path(file_id)
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1484	except errors.NoSuchId:
6015.47.8 by Vincent Ladeuil Address some points from gz's review.	1485	return self.other_tree.id2path(file_id)
	1486	# Skip the id2path lookup for older formats
	1487	return None
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1488
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1489	def _dump_conflicts(self, name, parent_id, file_id, this_lines=None,
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1490	base_lines=None, other_lines=None, set_version=False,
	1491	no_base=False):
1534.7.157 by Aaron Bentley Added more docs	1492	"""Emit conflict files.
	1493	If this_lines, base_lines, or other_lines are omitted, they will be
	1494	determined automatically. If set_version is true, the .OTHER, .THIS
	1495	or .BASE (in that order) will be created as versioned files.
	1496	"""
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1497	data = [('OTHER', self.other_tree, other_lines),
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1498	('THIS', self.this_tree, this_lines)]
	1499	if not no_base:
	1500	data.append(('BASE', self.base_tree, base_lines))
4443.2.1 by Ian Clatworthy apply content filters when merging new files	1501
	1502	# We need to use the actual path in the working tree of the file here,
	1503	# ignoring the conflict suffixes
	1504	wt = self.this_tree
	1505	if wt.supports_content_filtering():
	1506	try:
	1507	filter_tree_path = wt.id2path(file_id)
	1508	except errors.NoSuchId:
	1509	# file has been deleted
	1510	filter_tree_path = None
	1511	else:
	1512	# Skip the id2path lookup for older formats
	1513	filter_tree_path = None
	1514
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1515	versioned = False
	1516	file_group = []
	1517	for suffix, tree, lines in data:
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1518	if tree.has_id(file_id):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1519	trans_id = self._conflict_file(name, parent_id, tree, file_id,
4443.2.1 by Ian Clatworthy apply content filters when merging new files	1520	suffix, lines, filter_tree_path)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1521	file_group.append(trans_id)
	1522	if set_version and not versioned:
	1523	self.tt.version_file(file_id, trans_id)
	1524	versioned = True
	1525	return file_group
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1526
3363.17.21 by Aaron Bentley Conflicts are handled when merging from preview trees	1527	def _conflict_file(self, name, parent_id, tree, file_id, suffix,
4443.2.1 by Ian Clatworthy apply content filters when merging new files	1528	lines=None, filter_tree_path=None):
1534.7.157 by Aaron Bentley Added more docs	1529	"""Emit a single conflict file."""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1530	name = name + '.' + suffix
	1531	trans_id = self.tt.create_path(name, parent_id)
4854.1.1 by Andrew Bennetts Merge lp:bzr/2.0 into lp:bzr.	1532	transform.create_from_tree(self.tt, trans_id, tree, file_id, lines,
4443.2.1 by Ian Clatworthy apply content filters when merging new files	1533	filter_tree_path)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1534	return trans_id
	1535
	1536	def merge_executable(self, file_id, file_status):
1534.7.157 by Aaron Bentley Added more docs	1537	"""Perform a merge on the execute bit."""
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1538	executable = [self.executable(t, file_id) for t in (self.base_tree,
	1539	self.other_tree, self.this_tree)]
3514.4.40 by John Arbash Meinel Make 'resolver' a required parameter.	1540	self._merge_executable(file_id, executable, file_status,
	1541	resolver=self._three_way)
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1542
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1543	def _merge_executable(self, file_id, executable, file_status,
3514.4.40 by John Arbash Meinel Make 'resolver' a required parameter.	1544	resolver):
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1545	"""Perform a merge on the execute bit."""
	1546	base_executable, other_executable, this_executable = executable
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1547	if file_status == "deleted":
	1548	return
3514.4.21 by John Arbash Meinel Hook up the lca-way logic into the path handlers.	1549	winner = resolver(*executable)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1550	if winner == "conflict":
	1551	# There must be a None in here, if we have a conflict, but we
	1552	# need executability since file status was not deleted.
1534.10.35 by Aaron Bentley Merge handles contents + executable + deletion conflict	1553	if self.executable(self.other_tree, file_id) is None:
1534.7.142 by Aaron Bentley Fixed executability conflicts	1554	winner = "this"
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1555	else:
1534.7.142 by Aaron Bentley Fixed executability conflicts	1556	winner = "other"
1551.19.30 by Aaron Bentley Accelerate merge by skipping file existence check when merging execute bit	1557	if winner == 'this' and file_status != "modified":
	1558	return
	1559	trans_id = self.tt.trans_id_file_id(file_id)
4597.9.7 by Vincent Ladeuil transform.final_kind() now returns None instead of raising NoSuchFile.	1560	if self.tt.final_kind(trans_id) != "file":
1551.19.30 by Aaron Bentley Accelerate merge by skipping file existence check when merging execute bit	1561	return
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1562	if winner == "this":
1551.19.30 by Aaron Bentley Accelerate merge by skipping file existence check when merging execute bit	1563	executability = this_executable
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1564	else:
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1565	if self.other_tree.has_id(file_id):
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1566	executability = other_executable
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1567	elif self.this_tree.has_id(file_id):
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1568	executability = this_executable
4869.3.22 by Andrew Bennetts Use 'tree.has_id(file_id)' rather than using 'file_id in tree' or using tree.inventory.	1569	elif self.base_tree_has_id(file_id):
2590.2.3 by Aaron Bentley Merge the execute bit based on iter_changes	1570	executability = base_executable
1551.19.30 by Aaron Bentley Accelerate merge by skipping file existence check when merging execute bit	1571	if executability is not None:
	1572	trans_id = self.tt.trans_id_file_id(file_id)
	1573	self.tt.set_executability(executability, trans_id)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1574
1534.7.172 by Aaron Bentley Integrated fs conflicts with merge conflicts.	1575	def cook_conflicts(self, fs_conflicts):
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1576	"""Convert all conflicts into a form that doesn't depend on trans_id"""
5988.2.1 by Vincent Ladeuil Do not generate path conflicts if a corresponding content conflict exists	1577	content_conflict_file_ids = set()
	1578	cooked_conflicts = transform.cook_conflicts(fs_conflicts, self.tt)
4721.3.1 by Vincent Ladeuil Cleanup imports.	1579	fp = transform.FinalPaths(self.tt)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1580	for conflict in self._raw_conflicts:
	1581	conflict_type = conflict[0]
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1582	if conflict_type == 'path conflict':
	1583	(trans_id, file_id,
	1584	this_parent, this_name,
	1585	other_parent, other_name) = conflict[1:]
	1586	if this_parent is None or this_name is None:
	1587	this_path = '<deleted>'
	1588	else:
	1589	parent_path = fp.get_path(
	1590	self.tt.trans_id_file_id(this_parent))
	1591	this_path = osutils.pathjoin(parent_path, this_name)
	1592	if other_parent is None or other_name is None:
	1593	other_path = '<deleted>'
	1594	else:
5050.73.8 by Vincent Ladeuil Handle path conflicts involving different root-ids	1595	if other_parent == self.other_tree.get_root_id():
5050.73.9 by Vincent Ladeuil Fix typo.	1596	# The tree transform doesn't know about the other root,
5050.73.8 by Vincent Ladeuil Handle path conflicts involving different root-ids	1597	# so we special case here to avoid a NoFinalPath
	1598	# exception
	1599	parent_path = ''
	1600	else:
	1601	parent_path = fp.get_path(
	1602	self.tt.trans_id_file_id(other_parent))
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1603	other_path = osutils.pathjoin(parent_path, other_name)
	1604	c = _mod_conflicts.Conflict.factory(
	1605	'path conflict', path=this_path,
	1606	conflict_path=other_path,
	1607	file_id=file_id)
	1608	elif conflict_type == 'contents conflict':
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1609	for trans_id in conflict[1]:
	1610	file_id = self.tt.final_file_id(trans_id)
	1611	if file_id is not None:
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1612	# Ok we found the relevant file-id
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1613	break
	1614	path = fp.get_path(trans_id)
	1615	for suffix in ('.BASE', '.THIS', '.OTHER'):
	1616	if path.endswith(suffix):
6015.47.4 by Vincent Ladeuil Fix first half of the bug by producing a 'duplicate' conflict instead of a 'content' one when the file has been replaced in THIS and modified in OTHER.	1617	# Here is the raw path
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1618	path = path[:-len(suffix)]
	1619	break
4721.3.1 by Vincent Ladeuil Cleanup imports.	1620	c = _mod_conflicts.Conflict.factory(conflict_type,
4721.3.1 by Vincent Ladeuil Cleanup imports.	1621	path=path, file_id=file_id)
5988.2.1 by Vincent Ladeuil Do not generate path conflicts if a corresponding content conflict exists	1622	content_conflict_file_ids.add(file_id)
4597.7.11 by Vincent Ladeuil Fix #531967 by creating helpers for PathConflicts when a deletion	1623	elif conflict_type == 'text conflict':
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1624	trans_id = conflict[1]
	1625	path = fp.get_path(trans_id)
	1626	file_id = self.tt.final_file_id(trans_id)
4721.3.1 by Vincent Ladeuil Cleanup imports.	1627	c = _mod_conflicts.Conflict.factory(conflict_type,
4721.3.1 by Vincent Ladeuil Cleanup imports.	1628	path=path, file_id=file_id)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1629	else:
4597.7.18 by Vincent Ladeuil Start addressing Andrew's concerns.	1630	raise AssertionError('bad conflict type: %r' % (conflict,))
5988.2.1 by Vincent Ladeuil Do not generate path conflicts if a corresponding content conflict exists	1631	cooked_conflicts.append(c)
5988.2.2 by Vincent Ladeuil Make it clear that we start from an empty cooked_conflicts list.	1632
	1633	self.cooked_conflicts = []
5988.2.1 by Vincent Ladeuil Do not generate path conflicts if a corresponding content conflict exists	1634	# We want to get rid of path conflicts when a corresponding contents
	1635	# conflict exists. This can occur when one branch deletes a file while
	1636	# the other renames and modifies it. In this case, the content
	1637	# conflict is enough.
	1638	for c in cooked_conflicts:
	1639	if (c.typestring == 'path conflict'
	1640	and c.file_id in content_conflict_file_ids):
	1641	continue
1534.10.19 by Aaron Bentley Stanza conversion, cooking	1642	self.cooked_conflicts.append(c)
4721.3.1 by Vincent Ladeuil Cleanup imports.	1643	self.cooked_conflicts.sort(key=_mod_conflicts.Conflict.sort_key)
1534.7.141 by Aaron Bentley Added conflict reporting	1644
1534.7.141 by Aaron Bentley Added conflict reporting	1645
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1646	class WeaveMerger(Merge3Merger):
1534.7.167 by Aaron Bentley PEP8 and comment cleanups	1647	"""Three-way tree merger, text weave merger."""
1551.6.8 by Aaron Bentley Implemented reprocess for weave	1648	supports_reprocess = True
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1649	supports_show_base = False
3062.2.7 by Aaron Bentley Prevent reverse cherry-picking with weave	1650	supports_reverse_cherrypick = False
3062.2.9 by Aaron Bentley Don't use the base if not cherrypicking	1651	history_based = True
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1652
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1653	def _generate_merge_plan(self, file_id, base):
	1654	return self.this_tree.plan_file_merge(file_id, self.other_tree,
3062.2.9 by Aaron Bentley Don't use the base if not cherrypicking	1655	base=base)
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1656
	1657	def _merged_lines(self, file_id):
	1658	"""Generate the merged lines.
	1659	There is no distinction between lines that are meant to contain <<<<<<<
	1660	and conflicts.
	1661	"""
	1662	if self.cherrypick:
	1663	base = self.base_tree
	1664	else:
	1665	base = None
	1666	plan = self._generate_merge_plan(file_id, base)
1551.19.17 by Aaron Bentley Add debugging flag for merges	1667	if 'merge' in debug.debug_flags:
	1668	plan = list(plan)
	1669	trans_id = self.tt.trans_id_file_id(file_id)
	1670	name = self.tt.final_name(trans_id) + '.plan'
4634.101.6 by John Arbash Meinel killed-both and killed-base is 11 chars long.	1671	contents = ('%11s\|%s' % l for l in plan)
1551.19.17 by Aaron Bentley Add debugging flag for merges	1672	self.tt.new_file(name, self.tt.final_parent(trans_id), contents)
4721.3.1 by Vincent Ladeuil Cleanup imports.	1673	textmerge = versionedfile.PlanWeaveMerge(plan, '<<<<<<< TREE\n',
4721.3.1 by Vincent Ladeuil Cleanup imports.	1674	'>>>>>>> MERGE-SOURCE\n')
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1675	lines, conflicts = textmerge.merge_lines(self.reprocess)
	1676	if conflicts:
	1677	base_lines = textmerge.base_from_plan()
	1678	else:
	1679	base_lines = None
	1680	return lines, base_lines
4869.2.2 by Andrew Bennetts Remove some duplication.	1681
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1682	def text_merge(self, file_id, trans_id):
1534.7.157 by Aaron Bentley Added more docs	1683	"""Perform a (weave) text merge for a given file and file-id.
	1684	If conflicts are encountered, .THIS and .OTHER files will be emitted,
	1685	and a conflict will be noted.
	1686	"""
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1687	lines, base_lines = self._merged_lines(file_id)
1558.15.10 by Aaron Bentley Merge bzr.dev	1688	lines = list(lines)
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1689	# Note we're checking whether the OUTPUT is binary in this case,
1558.15.5 by Aaron Bentley Fixed binary handling in weave merge	1690	# because we don't want to get into weave merge guts.
4721.3.1 by Vincent Ladeuil Cleanup imports.	1691	textfile.check_text_lines(lines)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1692	self.tt.create_file(lines, trans_id)
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1693	if base_lines is not None:
	1694	# Conflict
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1695	self._raw_conflicts.append(('text conflict', trans_id))
	1696	name = self.tt.final_name(trans_id)
	1697	parent_id = self.tt.final_parent(trans_id)
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1698	file_group = self._dump_conflicts(name, parent_id, file_id,
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1699	no_base=False,
	1700	base_lines=base_lines)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1701	file_group.append(trans_id)
	1702
	1703
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	1704	class LCAMerger(WeaveMerger):
	1705
4634.101.7 by John Arbash Meinel Start working on the ability to drop a .BASE file for --weave and --lca merge.	1706	def _generate_merge_plan(self, file_id, base):
	1707	return self.this_tree.plan_file_lca_merge(file_id, self.other_tree,
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	1708	base=base)
	1709
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1710	class Diff3Merger(Merge3Merger):
1534.7.167 by Aaron Bentley PEP8 and comment cleanups	1711	"""Three-way merger using external diff3 for text merging"""
1711.7.20 by John Arbash Meinel always close files, minor PEP8 cleanup	1712
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1713	def dump_file(self, temp_dir, name, tree, file_id):
4721.3.1 by Vincent Ladeuil Cleanup imports.	1714	out_path = osutils.pathjoin(temp_dir, name)
1711.7.20 by John Arbash Meinel always close files, minor PEP8 cleanup	1715	out_file = open(out_path, "wb")
	1716	try:
	1717	in_file = tree.get_file(file_id)
	1718	for line in in_file:
	1719	out_file.write(line)
	1720	finally:
	1721	out_file.close()
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1722	return out_path
	1723
	1724	def text_merge(self, file_id, trans_id):
1534.7.157 by Aaron Bentley Added more docs	1725	"""Perform a diff3 merge using a specified file-id and trans-id.
	1726	If conflicts are encountered, .BASE, .THIS. and .OTHER conflict files
	1727	will be dumped, and a will be conflict noted.
	1728	"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1729	import bzrlib.patch
1996.3.18 by John Arbash Meinel Now that mkdtemp and rmtree are lazy, they should not be directly improted.	1730	temp_dir = osutils.mkdtemp(prefix="bzr-")
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1731	try:
4721.3.1 by Vincent Ladeuil Cleanup imports.	1732	new_file = osutils.pathjoin(temp_dir, "new")
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1733	this = self.dump_file(temp_dir, "this", self.this_tree, file_id)
	1734	base = self.dump_file(temp_dir, "base", self.base_tree, file_id)
	1735	other = self.dump_file(temp_dir, "other", self.other_tree, file_id)
	1736	status = bzrlib.patch.diff3(new_file, this, base, other)
	1737	if status not in (0, 1):
4721.3.1 by Vincent Ladeuil Cleanup imports.	1738	raise errors.BzrError("Unhandled diff3 exit code")
1711.7.20 by John Arbash Meinel always close files, minor PEP8 cleanup	1739	f = open(new_file, 'rb')
	1740	try:
	1741	self.tt.create_file(f, trans_id)
	1742	finally:
	1743	f.close()
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1744	if status == 1:
	1745	name = self.tt.final_name(trans_id)
	1746	parent_id = self.tt.final_parent(trans_id)
	1747	self._dump_conflicts(name, parent_id, file_id)
1551.8.39 by Aaron Bentley Fix diff3 conflict-reporting bug	1748	self._raw_conflicts.append(('text conflict', trans_id))
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1749	finally:
1996.3.18 by John Arbash Meinel Now that mkdtemp and rmtree are lazy, they should not be directly improted.	1750	osutils.rmtree(temp_dir)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1751
	1752
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1753	class PathNotInTree(errors.BzrError):
	1754
5246.2.28 by Andrew Bennetts Improve some docstrings.	1755	_fmt = """Merge-into failed because %(tree)s does not contain %(path)s."""
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1756
5246.2.23 by Andrew Bennetts Fix XXX by adding a test for that case, and don't use AssertionError for a legitimate user error.	1757	def __init__(self, path, tree):
	1758	errors.BzrError.__init__(self, path=path, tree=tree)
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1759
	1760
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1761	class MergeIntoMerger(Merger):
	1762	"""Merger that understands other_tree will be merged into a subdir.
	1763
	1764	This also changes the Merger api so that it uses real Branch, revision_id,
	1765	and RevisonTree objects, rather than using revision specs.
	1766	"""
	1767
	1768	def __init__(self, this_tree, other_branch, other_tree, target_subdir,
5246.2.22 by Andrew Bennetts Minor tweaks.	1769	source_subpath, other_rev_id=None):
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1770	"""Create a new MergeIntoMerger object.
	1771
5246.2.6 by Andrew Bennetts Improve some docstrings. Simplify code slightly.	1772	source_subpath in other_tree will be effectively copied to
	1773	target_subdir in this_tree.
	1774
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1775	:param this_tree: The tree that we will be merging into.
	1776	:param other_branch: The Branch we will be merging from.
	1777	:param other_tree: The RevisionTree object we want to merge.
	1778	:param target_subdir: The relative path where we want to merge
	1779	other_tree into this_tree
5246.2.6 by Andrew Bennetts Improve some docstrings. Simplify code slightly.	1780	:param source_subpath: The relative path specifying the subtree of
	1781	other_tree to merge into this_tree.
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1782	"""
	1783	# It is assumed that we are merging a tree that is not in our current
	1784	# ancestry, which means we are using the "EmptyTree" as our basis.
	1785	null_ancestor_tree = this_tree.branch.repository.revision_tree(
	1786	_mod_revision.NULL_REVISION)
	1787	super(MergeIntoMerger, self).__init__(
	1788	this_branch=this_tree.branch,
	1789	this_tree=this_tree,
	1790	other_tree=other_tree,
	1791	base_tree=null_ancestor_tree,
	1792	)
	1793	self._target_subdir = target_subdir
	1794	self._source_subpath = source_subpath
	1795	self.other_branch = other_branch
5246.2.22 by Andrew Bennetts Minor tweaks.	1796	if other_rev_id is None:
	1797	other_rev_id = other_tree.get_revision_id()
	1798	self.other_rev_id = self.other_basis = other_rev_id
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1799	self.base_is_ancestor = True
	1800	self.backup_files = True
	1801	self.merge_type = Merge3Merger
	1802	self.show_base = False
	1803	self.reprocess = False
	1804	self.interesting_ids = None
5246.2.32 by Andrew Bennetts Rename _Wrapper to _MergeTypeParameterizer.	1805	self.merge_type = _MergeTypeParameterizer(MergeIntoMergeType,
	1806	target_subdir=self._target_subdir,
	1807	source_subpath=self._source_subpath)
5246.2.11 by Andrew Bennetts Handle partial tree merges, add more tests, refactor tests a little.	1808	if self._source_subpath != '':
	1809	# If this isn't a partial merge make sure the revisions will be
	1810	# present.
	1811	self._maybe_fetch(self.other_branch, self.this_branch,
	1812	self.other_basis)
	1813
	1814	def set_pending(self):
	1815	if self._source_subpath != '':
	1816	return
	1817	Merger.set_pending(self)
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1818
	1819
5246.2.32 by Andrew Bennetts Rename _Wrapper to _MergeTypeParameterizer.	1820	class _MergeTypeParameterizer(object):
5246.2.29 by Andrew Bennetts Improve some docstrings.	1821	"""Wrap a merge-type class to provide extra parameters.
	1822
	1823	This is hack used by MergeIntoMerger to pass some extra parameters to its
	1824	merge_type. Merger.do_merge() sets up its own set of parameters to pass to
	1825	the 'merge_type' member. It is difficult override do_merge without
	1826	re-writing the whole thing, so instead we create a wrapper which will pass
	1827	the extra parameters.
	1828	"""
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1829
	1830	def __init__(self, merge_type, **kwargs):
	1831	self._extra_kwargs = kwargs
	1832	self._merge_type = merge_type
	1833
	1834	def __call__(self, args, *kwargs):
	1835	kwargs.update(self._extra_kwargs)
	1836	return self._merge_type(args, *kwargs)
	1837
	1838	def __getattr__(self, name):
	1839	return getattr(self._merge_type, name)
	1840
	1841
5246.2.30 by Andrew Bennetts Rename Merge3MergeIntoMerger to MergeIntoMergeType.	1842	class MergeIntoMergeType(Merge3Merger):
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1843	"""Merger that incorporates a tree (or part of a tree) into another."""
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1844
	1845	def __init__(self, args, *kwargs):
5246.2.28 by Andrew Bennetts Improve some docstrings.	1846	"""Initialize the merger object.
	1847
	1848	:param args: See Merge3Merger.__init__'s args.
	1849	:param kwargs: See Merge3Merger.__init__'s keyword args, except for
	1850	source_subpath and target_subdir.
	1851	:keyword source_subpath: The relative path specifying the subtree of
	1852	other_tree to merge into this_tree.
	1853	:keyword target_subdir: The relative path where we want to merge
	1854	other_tree into this_tree
	1855	"""
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1856	# All of the interesting work happens during Merge3Merger.__init__(),
	1857	# so we have have to hack in to get our extra parameters set.
	1858	self._source_subpath = kwargs.pop('source_subpath')
	1859	self._target_subdir = kwargs.pop('target_subdir')
5246.2.30 by Andrew Bennetts Rename Merge3MergeIntoMerger to MergeIntoMergeType.	1860	super(MergeIntoMergeType, self).__init__(args, *kwargs)
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1861
	1862	def _compute_transform(self):
	1863	child_pb = ui.ui_factory.nested_progress_bar()
	1864	try:
	1865	entries = self._entries_to_incorporate()
	1866	entries = list(entries)
	1867	for num, (entry, parent_id) in enumerate(entries):
6138.4.1 by Jonathan Riddell add gettext to progress bar strings	1868	child_pb.update(gettext('Preparing file merge'), num, len(entries))
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1869	parent_trans_id = self.tt.trans_id_file_id(parent_id)
	1870	trans_id = transform.new_by_entry(self.tt, entry,
	1871	parent_trans_id, self.other_tree)
	1872	finally:
	1873	child_pb.finished()
5246.2.33 by Andrew Bennetts Rename _finish_transform to _finish_computing_transform.	1874	self._finish_computing_transform()
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1875
	1876	def _entries_to_incorporate(self):
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1877	"""Yields pairs of (inventory_entry, new_parent)."""
6405.2.10 by Jelmer Vernooij Fix more tests.	1878	other_inv = self.other_tree.root_inventory
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1879	subdir_id = other_inv.path2id(self._source_subpath)
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1880	if subdir_id is None:
5246.2.20 by Andrew Bennetts Tweak comments, add NEWS entry.	1881	# XXX: The error would be clearer if it gave the URL of the source
	1882	# branch, but we don't have a reference to that here.
5246.2.23 by Andrew Bennetts Fix XXX by adding a test for that case, and don't use AssertionError for a legitimate user error.	1883	raise PathNotInTree(self._source_subpath, "Source tree")
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1884	subdir = other_inv[subdir_id]
	1885	parent_in_target = osutils.dirname(self._target_subdir)
6405.2.10 by Jelmer Vernooij Fix more tests.	1886	target_id = self.this_tree.path2id(parent_in_target)
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1887	if target_id is None:
5246.2.23 by Andrew Bennetts Fix XXX by adding a test for that case, and don't use AssertionError for a legitimate user error.	1888	raise PathNotInTree(self._target_subdir, "Target tree")
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1889	name_in_target = osutils.basename(self._target_subdir)
	1890	merge_into_root = subdir.copy()
	1891	merge_into_root.name = name_in_target
6405.2.10 by Jelmer Vernooij Fix more tests.	1892	if self.this_tree.has_id(merge_into_root.file_id):
5246.2.18 by Andrew Bennetts Fix traceback if source path does not exist.	1893	# Give the root a new file-id.
5246.2.23 by Andrew Bennetts Fix XXX by adding a test for that case, and don't use AssertionError for a legitimate user error.	1894	# This can happen fairly easily if the directory we are
	1895	# incorporating is the root, and both trees have 'TREE_ROOT' as
	1896	# their root_id. Users will expect this to Just Work, so we
	1897	# change the file-id here.
	1898	# Non-root file-ids could potentially conflict too. That's really
	1899	# an edge case, so we don't do anything special for those. We let
	1900	# them cause conflicts.
5246.2.9 by Andrew Bennetts Make all the existing tests pass.	1901	merge_into_root.file_id = generate_ids.gen_file_id(name_in_target)
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1902	yield (merge_into_root, target_id)
5246.2.10 by Andrew Bennetts Add more tests.	1903	if subdir.kind != 'directory':
	1904	# No children, so we are done.
	1905	return
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1906	for ignored_path, entry in other_inv.iter_entries_by_dir(subdir_id):
5246.2.9 by Andrew Bennetts Make all the existing tests pass.	1907	parent_id = entry.parent_id
	1908	if parent_id == subdir.file_id:
	1909	# The root's parent ID has changed, so make sure children of
	1910	# the root refer to the new ID.
	1911	parent_id = merge_into_root.file_id
	1912	yield (entry, parent_id)
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1913
	1914
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1915	def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
2255.2.31 by Robert Collins Work in progress to make merge_inner work with dirstate trees.	1916	backup_files=False,
	1917	merge_type=Merge3Merger,
	1918	interesting_ids=None,
	1919	show_base=False,
	1920	reprocess=False,
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1921	other_rev_id=None,
	1922	interesting_files=None,
1534.9.9 by Aaron Bentley Added progress bar to pull	1923	this_tree=None,
4961.2.9 by Martin Pool Rip out most remaining uses of DummyProgressBar	1924	pb=None,
5993.2.4 by Jelmer Vernooij Remove feature flag.	1925	change_reporter=None):
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	1926	"""Primary interface for merging.
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1927
5246.2.1 by Andrew Bennetts Very rough first draft of cmd_merge_into from bzr-merge-into. Passes its blackbox tests.	1928	Typical use is probably::
	1929
	1930	merge_inner(branch, branch.get_revision_tree(other_revision),
	1931	branch.get_revision_tree(base_revision))
	1932	"""
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1933	if this_tree is None:
4721.3.1 by Vincent Ladeuil Cleanup imports.	1934	raise errors.BzrError("bzrlib.merge.merge_inner requires a this_tree "
5993.2.1 by Jelmer Vernooij Add test for rootless tree merge.	1935	"parameter")
2255.2.31 by Robert Collins Work in progress to make merge_inner work with dirstate trees.	1936	merger = Merger(this_branch, other_tree, base_tree, this_tree=this_tree,
1551.11.10 by Aaron Bentley Add change reporting to pull	1937	pb=pb, change_reporter=change_reporter)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1938	merger.backup_files = backup_files
	1939	merger.merge_type = merge_type
	1940	merger.interesting_ids = interesting_ids
1551.2.23 by Aaron Bentley Got merge_inner's ignore_zero parameter working	1941	merger.ignore_zero = ignore_zero
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1942	if interesting_files:
3376.2.4 by Martin Pool Remove every assert statement from bzrlib!	1943	if interesting_ids:
	1944	raise ValueError('Only supply interesting_ids'
	1945	' or interesting_files')
2590.2.5 by Aaron Bentley Allow selected files to be specified instead of selected ids	1946	merger.interesting_files = interesting_files
1979.2.1 by Robert Collins (robertc) adds a convenience method "merge_from_branch" to WorkingTree.	1947	merger.show_base = show_base
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1948	merger.reprocess = reprocess
	1949	merger.other_rev_id = other_rev_id
	1950	merger.other_basis = other_rev_id
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	1951	get_revision_id = getattr(base_tree, 'get_revision_id', None)
	1952	if get_revision_id is None:
	1953	get_revision_id = base_tree.last_revision
4595.13.2 by Alexander Belchenko [cherrypick revno 4650 from bzr.dev] Fix shelve on windows. (Robert Collins, #305006)	1954	merger.cache_trees_with_revision_ids([other_tree, base_tree, this_tree])
3249.3.1 by John Arbash Meinel Implement cherrypick support for Merge3	1955	merger.set_base_revision(get_revision_id(), this_branch)
1534.7.140 by Aaron Bentley Moved the merge stuff into merge.py	1956	return merger.do_merge()
	1957
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	1958
	1959	merge_type_registry = registry.Registry()
6259.3.2 by Martin Packman No longer want register_lazy as passing objects directly	1960	merge_type_registry.register('diff3', Diff3Merger,
6259.3.3 by Martin Packman Merge bzr.dev to resolve conflicts with updated registry help strings	1961	"Merge using external diff3.")
6259.3.2 by Martin Packman No longer want register_lazy as passing objects directly	1962	merge_type_registry.register('lca', LCAMerger,
6259.3.3 by Martin Packman Merge bzr.dev to resolve conflicts with updated registry help strings	1963	"LCA-newness merge.")
6259.3.2 by Martin Packman No longer want register_lazy as passing objects directly	1964	merge_type_registry.register('merge3', Merge3Merger,
6259.3.3 by Martin Packman Merge bzr.dev to resolve conflicts with updated registry help strings	1965	"Native diff3-style merge.")
6259.3.2 by Martin Packman No longer want register_lazy as passing objects directly	1966	merge_type_registry.register('weave', WeaveMerger,
6259.3.3 by Martin Packman Merge bzr.dev to resolve conflicts with updated registry help strings	1967	"Weave-based merge.")
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	1968
	1969
2221.4.15 by Aaron Bentley Use RegistryOption for merge type	1970	def get_merge_type_registry():
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	1971	"""Merge type registry was previously in bzrlib.option
2221.4.15 by Aaron Bentley Use RegistryOption for merge type	1972
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	1973	This method provides a backwards compatible way to retrieve it.
2221.4.15 by Aaron Bentley Use RegistryOption for merge type	1974	"""
6259.3.1 by Martin Packman Relocate merge type registry to bzrlib.merge from bzrlib.option	1975	return merge_type_registry
1551.15.46 by Aaron Bentley Move plan merge to tree	1976
	1977
	1978	def _plan_annotate_merge(annotated_a, annotated_b, ancestors_a, ancestors_b):
	1979	def status_a(revision, text):
	1980	if revision in ancestors_b:
	1981	return 'killed-b', text
	1982	else:
	1983	return 'new-a', text
	1984
	1985	def status_b(revision, text):
	1986	if revision in ancestors_a:
	1987	return 'killed-a', text
	1988	else:
	1989	return 'new-b', text
	1990
	1991	plain_a = [t for (a, t) in annotated_a]
	1992	plain_b = [t for (a, t) in annotated_b]
	1993	matcher = patiencediff.PatienceSequenceMatcher(None, plain_a, plain_b)
	1994	blocks = matcher.get_matching_blocks()
	1995	a_cur = 0
	1996	b_cur = 0
	1997	for ai, bi, l in blocks:
	1998	# process all mismatched sections
	1999	# (last mismatched section is handled because blocks always
	2000	# includes a 0-length last block)
	2001	for revision, text in annotated_a[a_cur:ai]:
	2002	yield status_a(revision, text)
	2003	for revision, text in annotated_b[b_cur:bi]:
	2004	yield status_b(revision, text)
	2005	# and now the matched section
	2006	a_cur = ai + l
	2007	b_cur = bi + l
3376.2.8 by Martin Pool Some review cleanups for assertion removal	2008	for text_a in plain_a[ai:a_cur]:
1551.15.46 by Aaron Bentley Move plan merge to tree	2009	yield "unchanged", text_a
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2010
	2011
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2012	class _PlanMergeBase(object):
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2013
3350.6.10 by Martin Pool VersionedFiles review cleanups	2014	def __init__(self, a_rev, b_rev, vf, key_prefix):
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2015	"""Contructor.
	2016
	2017	:param a_rev: Revision-id of one revision to merge
	2018	:param b_rev: Revision-id of the other revision to merge
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2019	:param vf: A VersionedFiles containing both revisions
3350.6.10 by Martin Pool VersionedFiles review cleanups	2020	:param key_prefix: A prefix for accessing keys in vf, typically
3350.6.10 by Martin Pool VersionedFiles review cleanups	2021	(file_id,).
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2022	"""
	2023	self.a_rev = a_rev
	2024	self.b_rev = b_rev
	2025	self.vf = vf
3062.1.12 by Aaron Bentley Implement simple text cache	2026	self._last_lines = None
3062.1.12 by Aaron Bentley Implement simple text cache	2027	self._last_lines_revision_id = None
3144.3.7 by Aaron Bentley Update from review	2028	self._cached_matching_blocks = {}
3350.6.10 by Martin Pool VersionedFiles review cleanups	2029	self._key_prefix = key_prefix
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2030	self._precache_tip_lines()
	2031
	2032	def _precache_tip_lines(self):
	2033	lines = self.get_lines([self.a_rev, self.b_rev])
	2034	self.lines_a = lines[self.a_rev]
	2035	self.lines_b = lines[self.b_rev]
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2036
	2037	def get_lines(self, revisions):
	2038	"""Get lines for revisions from the backing VersionedFiles.
3890.2.9 by John Arbash Meinel Start using osutils.chunks_as_lines rather than osutils.split_lines.	2039
3350.6.10 by Martin Pool VersionedFiles review cleanups	2040	:raises RevisionNotPresent: on absent texts.
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2041	"""
3350.6.10 by Martin Pool VersionedFiles review cleanups	2042	keys = [(self._key_prefix + (rev,)) for rev in revisions]
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2043	result = {}
	2044	for record in self.vf.get_record_stream(keys, 'unordered', True):
	2045	if record.storage_kind == 'absent':
	2046	raise errors.RevisionNotPresent(record.key, self.vf)
3890.2.9 by John Arbash Meinel Start using osutils.chunks_as_lines rather than osutils.split_lines.	2047	result[record.key[-1]] = osutils.chunks_to_lines(
	2048	record.get_bytes_as('chunked'))
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2049	return result
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2050
	2051	def plan_merge(self):
	2052	"""Generate a 'plan' for merging the two revisions.
	2053
	2054	This involves comparing their texts and determining the cause of
	2055	differences. If text A has a line and text B does not, then either the
	2056	line was added to text A, or it was deleted from B. Once the causes
	2057	are combined, they are written out in the format described in
	2058	VersionedFile.plan_merge
	2059	"""
	2060	blocks = self._get_matching_blocks(self.a_rev, self.b_rev)
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2061	unique_a, unique_b = self._unique_lines(blocks)
	2062	new_a, killed_b = self._determine_status(self.a_rev, unique_a)
	2063	new_b, killed_a = self._determine_status(self.b_rev, unique_b)
	2064	return self._iter_plan(blocks, new_a, killed_b, new_b, killed_a)
	2065
	2066	def _iter_plan(self, blocks, new_a, killed_b, new_b, killed_a):
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2067	last_i = 0
	2068	last_j = 0
	2069	for i, j, n in blocks:
	2070	for a_index in range(last_i, i):
	2071	if a_index in new_a:
3144.3.2 by Aaron Bentley Get conflict handling working	2072	if a_index in killed_b:
	2073	yield 'conflicted-a', self.lines_a[a_index]
	2074	else:
	2075	yield 'new-a', self.lines_a[a_index]
	2076	else:
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2077	yield 'killed-b', self.lines_a[a_index]
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2078	for b_index in range(last_j, j):
	2079	if b_index in new_b:
3144.3.2 by Aaron Bentley Get conflict handling working	2080	if b_index in killed_a:
3144.3.10 by Aaron Bentley Use correct index when emitting conflicted-b	2081	yield 'conflicted-b', self.lines_b[b_index]
3144.3.2 by Aaron Bentley Get conflict handling working	2082	else:
	2083	yield 'new-b', self.lines_b[b_index]
	2084	else:
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2085	yield 'killed-a', self.lines_b[b_index]
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2086	# handle common lines
	2087	for a_index in range(i, i+n):
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2088	yield 'unchanged', self.lines_a[a_index]
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2089	last_i = i+n
	2090	last_j = j+n
	2091
	2092	def _get_matching_blocks(self, left_revision, right_revision):
	2093	"""Return a description of which sections of two revisions match.
	2094
	2095	See SequenceMatcher.get_matching_blocks
	2096	"""
3144.3.7 by Aaron Bentley Update from review	2097	cached = self._cached_matching_blocks.get((left_revision,
	2098	right_revision))
	2099	if cached is not None:
	2100	return cached
3062.1.12 by Aaron Bentley Implement simple text cache	2101	if self._last_lines_revision_id == left_revision:
3062.1.12 by Aaron Bentley Implement simple text cache	2102	left_lines = self._last_lines
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2103	right_lines = self.get_lines([right_revision])[right_revision]
3062.1.12 by Aaron Bentley Implement simple text cache	2104	else:
3350.6.4 by Robert Collins First cut at pluralised VersionedFiles. Some rather massive API incompatabilities, primarily because of the difficulty of coherence among competing stores.	2105	lines = self.get_lines([left_revision, right_revision])
	2106	left_lines = lines[left_revision]
	2107	right_lines = lines[right_revision]
3062.1.12 by Aaron Bentley Implement simple text cache	2108	self._last_lines = right_lines
3062.1.12 by Aaron Bentley Implement simple text cache	2109	self._last_lines_revision_id = right_revision
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2110	matcher = patiencediff.PatienceSequenceMatcher(None, left_lines,
	2111	right_lines)
	2112	return matcher.get_matching_blocks()
	2113
	2114	def _unique_lines(self, matching_blocks):
	2115	"""Analyse matching_blocks to determine which lines are unique
	2116
	2117	:return: a tuple of (unique_left, unique_right), where the values are
	2118	sets of line numbers of unique lines.
	2119	"""
	2120	last_i = 0
	2121	last_j = 0
	2122	unique_left = []
	2123	unique_right = []
	2124	for i, j, n in matching_blocks:
	2125	unique_left.extend(range(last_i, i))
	2126	unique_right.extend(range(last_j, j))
	2127	last_i = i + n
	2128	last_j = j + n
	2129	return unique_left, unique_right
	2130
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2131	@staticmethod
	2132	def _subtract_plans(old_plan, new_plan):
3144.3.7 by Aaron Bentley Update from review	2133	"""Remove changes from new_plan that came from old_plan.
	2134
	2135	It is assumed that the difference between the old_plan and new_plan
	2136	is their choice of 'b' text.
	2137
	2138	All lines from new_plan that differ from old_plan are emitted
	2139	verbatim. All lines from new_plan that match old_plan but are
	2140	not about the 'b' revision are emitted verbatim.
	2141
	2142	Lines that match and are about the 'b' revision are the lines we
	2143	don't want, so we convert 'killed-b' -> 'unchanged', and 'new-b'
	2144	is skipped entirely.
	2145	"""
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2146	matcher = patiencediff.PatienceSequenceMatcher(None, old_plan,
	2147	new_plan)
	2148	last_j = 0
	2149	for i, j, n in matcher.get_matching_blocks():
	2150	for jj in range(last_j, j):
	2151	yield new_plan[jj]
	2152	for jj in range(j, j+n):
	2153	plan_line = new_plan[jj]
	2154	if plan_line[0] == 'new-b':
	2155	pass
	2156	elif plan_line[0] == 'killed-b':
	2157	yield 'unchanged', plan_line[1]
	2158	else:
	2159	yield plan_line
	2160	last_j = j + n
	2161
	2162
	2163	class _PlanMerge(_PlanMergeBase):
	2164	"""Plan an annotate merge using on-the-fly annotation"""
	2165
3350.6.10 by Martin Pool VersionedFiles review cleanups	2166	def __init__(self, a_rev, b_rev, vf, key_prefix):
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2167	super(_PlanMerge, self).__init__(a_rev, b_rev, vf, key_prefix)
	2168	self.a_key = self._key_prefix + (self.a_rev,)
	2169	self.b_key = self._key_prefix + (self.b_rev,)
4721.3.1 by Vincent Ladeuil Cleanup imports.	2170	self.graph = _mod_graph.Graph(self.vf)
3514.2.11 by John Arbash Meinel Shortcut the case when one revision is in the ancestry of the other.	2171	heads = self.graph.heads((self.a_key, self.b_key))
	2172	if len(heads) == 1:
	2173	# one side dominates, so we can just return its values, yay for
	2174	# per-file graphs
	2175	# Ideally we would know that before we get this far
	2176	self._head_key = heads.pop()
	2177	if self._head_key == self.a_key:
	2178	other = b_rev
	2179	else:
	2180	other = a_rev
4721.3.1 by Vincent Ladeuil Cleanup imports.	2181	trace.mutter('found dominating revision for %s\n%s > %s', self.vf,
4721.3.1 by Vincent Ladeuil Cleanup imports.	2182	self._head_key[-1], other)
3514.2.11 by John Arbash Meinel Shortcut the case when one revision is in the ancestry of the other.	2183	self._weave = None
	2184	else:
	2185	self._head_key = None
	2186	self._build_weave()
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2187
	2188	def _precache_tip_lines(self):
	2189	# Turn this into a no-op, because we will do this later
	2190	pass
	2191
	2192	def _find_recursive_lcas(self):
	2193	"""Find all the ancestors back to a unique lca"""
	2194	cur_ancestors = (self.a_key, self.b_key)
	2195	# graph.find_lca(uncommon, keys) now returns plain NULL_REVISION,
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2196	# rather than a key tuple. We will just map that directly to no common
	2197	# ancestors.
	2198	parent_map = {}
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2199	while True:
	2200	next_lcas = self.graph.find_lca(*cur_ancestors)
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2201	# Map a plain NULL_REVISION to a simple no-ancestors
4721.3.1 by Vincent Ladeuil Cleanup imports.	2202	if next_lcas == set([_mod_revision.NULL_REVISION]):
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2203	next_lcas = ()
3514.2.9 by John Arbash Meinel Add some debugging, and work on getting the graph right so we get the weave insertion order correct.	2204	# Order the lca's based on when they were merged into the tip
	2205	# While the actual merge portion of weave merge uses a set() of
	2206	# active revisions, the order of insertion does effect the
	2207	# implicit ordering of the texts.
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2208	for rev_key in cur_ancestors:
3514.2.9 by John Arbash Meinel Add some debugging, and work on getting the graph right so we get the weave insertion order correct.	2209	ordered_parents = tuple(self.graph.find_merge_order(rev_key,
	2210	next_lcas))
	2211	parent_map[rev_key] = ordered_parents
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2212	if len(next_lcas) == 0:
	2213	break
	2214	elif len(next_lcas) == 1:
3514.2.9 by John Arbash Meinel Add some debugging, and work on getting the graph right so we get the weave insertion order correct.	2215	parent_map[list(next_lcas)[0]] = ()
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2216	break
3514.2.10 by John Arbash Meinel Handle more edge cases.	2217	elif len(next_lcas) > 2:
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2218	# More than 2 lca's, fall back to grabbing all nodes between
	2219	# this and the unique lca.
4721.3.1 by Vincent Ladeuil Cleanup imports.	2220	trace.mutter('More than 2 LCAs, falling back to all nodes for:'
	2221	' %s, %s\n=> %s',
	2222	self.a_key, self.b_key, cur_ancestors)
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2223	cur_lcas = next_lcas
	2224	while len(cur_lcas) > 1:
	2225	cur_lcas = self.graph.find_lca(*cur_lcas)
	2226	if len(cur_lcas) == 0:
	2227	# No common base to find, use the full ancestry
	2228	unique_lca = None
	2229	else:
3514.2.8 by John Arbash Meinel The insertion ordering into the weave has an impact on conflicts.	2230	unique_lca = list(cur_lcas)[0]
4721.3.1 by Vincent Ladeuil Cleanup imports.	2231	if unique_lca == _mod_revision.NULL_REVISION:
3514.2.14 by John Arbash Meinel Bring in the code to collapse linear portions of the graph.	2232	# find_lca will return a plain 'NULL_REVISION' rather
	2233	# than a key tuple when there is no common ancestor, we
	2234	# prefer to just use None, because it doesn't confuse
	2235	# _get_interesting_texts()
	2236	unique_lca = None
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2237	parent_map.update(self._find_unique_parents(next_lcas,
	2238	unique_lca))
	2239	break
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2240	cur_ancestors = next_lcas
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2241	return parent_map
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2242
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2243	def _find_unique_parents(self, tip_keys, base_key):
	2244	"""Find ancestors of tip that aren't ancestors of base.
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	2245
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2246	:param tip_keys: Nodes that are interesting
	2247	:param base_key: Cull all ancestors of this node
	2248	:return: The parent map for all revisions between tip_keys and
	2249	base_key. base_key will be included. References to nodes outside of
	2250	the ancestor set will also be removed.
	2251	"""
	2252	# TODO: this would be simpler if find_unique_ancestors took a list
	2253	# instead of a single tip, internally it supports it, but it
	2254	# isn't a "backwards compatible" api change.
	2255	if base_key is None:
	2256	parent_map = dict(self.graph.iter_ancestry(tip_keys))
3514.2.14 by John Arbash Meinel Bring in the code to collapse linear portions of the graph.	2257	# We remove NULL_REVISION because it isn't a proper tuple key, and
	2258	# thus confuses things like _get_interesting_texts, and our logic
	2259	# to add the texts into the memory weave.
4721.3.1 by Vincent Ladeuil Cleanup imports.	2260	if _mod_revision.NULL_REVISION in parent_map:
4721.3.1 by Vincent Ladeuil Cleanup imports.	2261	parent_map.pop(_mod_revision.NULL_REVISION)
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2262	else:
	2263	interesting = set()
	2264	for tip in tip_keys:
	2265	interesting.update(
	2266	self.graph.find_unique_ancestors(tip, [base_key]))
	2267	parent_map = self.graph.get_parent_map(interesting)
	2268	parent_map[base_key] = ()
3514.2.12 by John Arbash Meinel Start refactoring into helper functions	2269	culled_parent_map, child_map, tails = self._remove_external_references(
	2270	parent_map)
3514.2.13 by John Arbash Meinel Add the ability to prune extra tails from the parent_map.	2271	# Remove all the tails but base_key
3514.2.14 by John Arbash Meinel Bring in the code to collapse linear portions of the graph.	2272	if base_key is not None:
	2273	tails.remove(base_key)
	2274	self._prune_tails(culled_parent_map, child_map, tails)
	2275	# Now remove all the uninteresting 'linear' regions
3514.2.15 by John Arbash Meinel Enable collapsing linear regions.	2276	simple_map = _mod_graph.collapse_linear_regions(culled_parent_map)
	2277	return simple_map
3514.2.12 by John Arbash Meinel Start refactoring into helper functions	2278
	2279	@staticmethod
	2280	def _remove_external_references(parent_map):
	2281	"""Remove references that go outside of the parent map.
	2282
	2283	:param parent_map: Something returned from Graph.get_parent_map(keys)
	2284	:return: (filtered_parent_map, child_map, tails)
	2285	filtered_parent_map is parent_map without external references
	2286	child_map is the {parent_key: [child_keys]} mapping
	2287	tails is a list of nodes that do not have any parents in the map
	2288	"""
	2289	# TODO: The basic effect of this function seems more generic than
	2290	# _PlanMerge. But the specific details of building a child_map,
	2291	# and computing tails seems very specific to _PlanMerge.
	2292	# Still, should this be in Graph land?
	2293	filtered_parent_map = {}
	2294	child_map = {}
	2295	tails = []
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2296	for key, parent_keys in parent_map.iteritems():
3514.2.12 by John Arbash Meinel Start refactoring into helper functions	2297	culled_parent_keys = [p for p in parent_keys if p in parent_map]
	2298	if not culled_parent_keys:
	2299	tails.append(key)
	2300	for parent_key in culled_parent_keys:
	2301	child_map.setdefault(parent_key, []).append(key)
	2302	# TODO: Do we want to do this, it adds overhead for every node,
	2303	# just to say that the node has no children
	2304	child_map.setdefault(key, [])
	2305	filtered_parent_map[key] = culled_parent_keys
	2306	return filtered_parent_map, child_map, tails
	2307
3514.2.13 by John Arbash Meinel Add the ability to prune extra tails from the parent_map.	2308	@staticmethod
	2309	def _prune_tails(parent_map, child_map, tails_to_remove):
	2310	"""Remove tails from the parent map.
3943.8.1 by Marius Kruger remove all trailing whitespace from bzr source	2311
3514.2.13 by John Arbash Meinel Add the ability to prune extra tails from the parent_map.	2312	This will remove the supplied revisions until no more children have 0
	2313	parents.
	2314
	2315	:param parent_map: A dict of {child: [parents]}, this dictionary will
	2316	be modified in place.
	2317	:param tails_to_remove: A list of tips that should be removed,
	2318	this list will be consumed
	2319	:param child_map: The reverse dict of parent_map ({parent: [children]})
	2320	this dict will be modified
	2321	:return: None, parent_map will be modified in place.
	2322	"""
	2323	while tails_to_remove:
	2324	next = tails_to_remove.pop()
	2325	parent_map.pop(next)
	2326	children = child_map.pop(next)
	2327	for child in children:
	2328	child_parents = parent_map[child]
	2329	child_parents.remove(next)
	2330	if len(child_parents) == 0:
	2331	tails_to_remove.append(child)
3514.2.7 by John Arbash Meinel Fix the failing test by implementing the fallback logic.	2332
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2333	def _get_interesting_texts(self, parent_map):
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2334	"""Return a dict of texts we are interested in.
	2335
	2336	Note that the input is in key tuples, but the output is in plain
	2337	revision ids.
	2338
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2339	:param parent_map: The output from _find_recursive_lcas
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2340	:return: A dict of {'revision_id':lines} as returned by
	2341	_PlanMergeBase.get_lines()
	2342	"""
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2343	all_revision_keys = set(parent_map)
	2344	all_revision_keys.add(self.a_key)
	2345	all_revision_keys.add(self.b_key)
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2346
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2347	# Everything else is in 'keys' but get_lines is in 'revision_ids'
	2348	all_texts = self.get_lines([k[-1] for k in all_revision_keys])
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2349	return all_texts
	2350
	2351	def _build_weave(self):
	2352	from bzrlib import weave
	2353	self._weave = weave.Weave(weave_name='in_memory_weave',
	2354	allow_reserved=True)
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2355	parent_map = self._find_recursive_lcas()
	2356
	2357	all_texts = self._get_interesting_texts(parent_map)
	2358
	2359	# Note: Unfortunately, the order given by topo_sort will effect the
	2360	# ordering resolution in the output. Specifically, if you add A then B,
	2361	# then in the output text A lines will show up before B lines. And, of
	2362	# course, topo_sort doesn't guarantee any real ordering.
3514.2.8 by John Arbash Meinel The insertion ordering into the weave has an impact on conflicts.	2363	# So we use merge_sort, and add a fake node on the tip.
	2364	# This ensures that left-hand parents will always be inserted into the
	2365	# weave before right-hand parents.
	2366	tip_key = self._key_prefix + (_mod_revision.CURRENT_REVISION,)
	2367	parent_map[tip_key] = (self.a_key, self.b_key)
	2368
	2369	for seq_num, key, depth, eom in reversed(tsort.merge_sort(parent_map,
	2370	tip_key)):
	2371	if key == tip_key:
	2372	continue
3514.2.9 by John Arbash Meinel Add some debugging, and work on getting the graph right so we get the weave insertion order correct.	2373	# for key in tsort.topo_sort(parent_map):
3514.2.5 by John Arbash Meinel Switch to the get_parent_map design I had settled on.	2374	parent_keys = parent_map[key]
	2375	revision_id = key[-1]
	2376	parent_ids = [k[-1] for k in parent_keys]
	2377	self._weave.add_lines(revision_id, parent_ids,
	2378	all_texts[revision_id])
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2379
	2380	def plan_merge(self):
	2381	"""Generate a 'plan' for merging the two revisions.
	2382
	2383	This involves comparing their texts and determining the cause of
	2384	differences. If text A has a line and text B does not, then either the
	2385	line was added to text A, or it was deleted from B. Once the causes
	2386	are combined, they are written out in the format described in
	2387	VersionedFile.plan_merge
	2388	"""
	2389	if self._head_key is not None: # There was a single head
	2390	if self._head_key == self.a_key:
	2391	plan = 'new-a'
3062.1.9 by Aaron Bentley Move PlanMerge into merge and _PlanMergeVersionedFile into versionedfile	2392	else:
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2393	if self._head_key != self.b_key:
	2394	raise AssertionError('There was an invalid head: %s != %s'
	2395	% (self.b_key, self._head_key))
	2396	plan = 'new-b'
3514.2.16 by John Arbash Meinel Review feedback from Ian.	2397	head_rev = self._head_key[-1]
3514.2.16 by John Arbash Meinel Review feedback from Ian.	2398	lines = self.get_lines([head_rev])[head_rev]
3514.2.2 by John Arbash Meinel Restore a real weave merge to 'bzr merge --weave'.	2399	return ((plan, line) for line in lines)
	2400	return self._weave.plan_merge(self.a_rev, self.b_rev)
3062.2.1 by Aaron Bentley Add support for plan-merge with a base	2401
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2402
	2403	class _PlanLCAMerge(_PlanMergeBase):
	2404	"""
3144.3.7 by Aaron Bentley Update from review	2405	This merge algorithm differs from _PlanMerge in that:
5891.1.2 by Andrew Bennetts Fix a bunch of docstring formatting nits, making pydoctor a bit happier.	2406
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2407	1. comparisons are done against LCAs only
	2408	2. cases where a contested line is new versus one LCA but old versus
3144.3.7 by Aaron Bentley Update from review	2409	another are marked as conflicts, by emitting the line as conflicted-a
3144.3.7 by Aaron Bentley Update from review	2410	or conflicted-b.
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2411
	2412	This is faster, and hopefully produces more useful output.
	2413	"""
	2414
3350.6.10 by Martin Pool VersionedFiles review cleanups	2415	def __init__(self, a_rev, b_rev, vf, key_prefix, graph):
	2416	_PlanMergeBase.__init__(self, a_rev, b_rev, vf, key_prefix)
	2417	lcas = graph.find_lca(key_prefix + (a_rev,), key_prefix + (b_rev,))
3350.6.5 by Robert Collins Update to bzr.dev.	2418	self.lcas = set()
3350.6.5 by Robert Collins Update to bzr.dev.	2419	for lca in lcas:
4721.3.1 by Vincent Ladeuil Cleanup imports.	2420	if lca == _mod_revision.NULL_REVISION:
3350.6.5 by Robert Collins Update to bzr.dev.	2421	self.lcas.add(lca)
	2422	else:
	2423	self.lcas.add(lca[-1])
3144.3.7 by Aaron Bentley Update from review	2424	for lca in self.lcas:
3287.17.1 by John Arbash Meinel Fix bug #235715 by using the empty list as the text for a base of NULL_REVISION.	2425	if _mod_revision.is_null(lca):
	2426	lca_lines = []
	2427	else:
3350.6.5 by Robert Collins Update to bzr.dev.	2428	lca_lines = self.get_lines([lca])[lca]
3144.3.7 by Aaron Bentley Update from review	2429	matcher = patiencediff.PatienceSequenceMatcher(None, self.lines_a,
	2430	lca_lines)
	2431	blocks = list(matcher.get_matching_blocks())
	2432	self._cached_matching_blocks[(a_rev, lca)] = blocks
	2433	matcher = patiencediff.PatienceSequenceMatcher(None, self.lines_b,
	2434	lca_lines)
	2435	blocks = list(matcher.get_matching_blocks())
	2436	self._cached_matching_blocks[(b_rev, lca)] = blocks
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2437
3144.3.7 by Aaron Bentley Update from review	2438	def _determine_status(self, revision_id, unique_line_numbers):
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2439	"""Determines the status unique lines versus all lcas.
	2440
	2441	Basically, determines why the line is unique to this revision.
	2442
	2443	A line may be determined new, killed, or both.
	2444
3144.3.7 by Aaron Bentley Update from review	2445	If a line is determined new, that means it was not present in at least
3144.3.7 by Aaron Bentley Update from review	2446	one LCA, and is not present in the other merge revision.
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2447
	2448	If a line is determined killed, that means the line was present in
	2449	at least one LCA.
	2450
	2451	If a line is killed and new, this indicates that the two merge
	2452	revisions contain differing conflict resolutions.
5891.1.2 by Andrew Bennetts Fix a bunch of docstring formatting nits, making pydoctor a bit happier.	2453
3144.3.7 by Aaron Bentley Update from review	2454	:param revision_id: The id of the revision in which the lines are
	2455	unique
	2456	:param unique_line_numbers: The line numbers of unique lines.
5891.1.2 by Andrew Bennetts Fix a bunch of docstring formatting nits, making pydoctor a bit happier.	2457	:return: a tuple of (new_this, killed_other)
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2458	"""
	2459	new = set()
	2460	killed = set()
3144.3.7 by Aaron Bentley Update from review	2461	unique_line_numbers = set(unique_line_numbers)
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2462	for lca in self.lcas:
	2463	blocks = self._get_matching_blocks(revision_id, lca)
	2464	unique_vs_lca, _ignored = self._unique_lines(blocks)
3144.3.7 by Aaron Bentley Update from review	2465	new.update(unique_line_numbers.intersection(unique_vs_lca))
3144.3.7 by Aaron Bentley Update from review	2466	killed.update(unique_line_numbers.difference(unique_vs_lca))
3144.3.1 by Aaron Bentley Implement LCA merge, with problematic conflict markers	2467	return new, killed