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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from itertools import chain
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib import (
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branch as _mod_branch,
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conflicts as _mod_conflicts,
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graph as _mod_graph,
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revision as _mod_revision,
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from bzrlib.branch import Branch
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from bzrlib.conflicts import ConflictList, Conflict
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from bzrlib.errors import (BzrCommandError,
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WorkingTreeNotRevision,
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from bzrlib.graph import Graph
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from bzrlib.merge3 import Merge3
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from bzrlib.osutils import rename, pathjoin
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from progress import DummyProgress, ProgressPhase
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from bzrlib.revision import (NULL_REVISION, ensure_null)
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from bzrlib.textfile import check_text_lines
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from bzrlib.trace import mutter, warning, note, is_quiet
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from bzrlib.transform import (TransformPreview, TreeTransform,
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resolve_conflicts, cook_conflicts,
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conflict_pass, FinalPaths, create_by_entry,
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unique_add, ROOT_PARENT)
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from bzrlib.versionedfile import PlanWeaveMerge
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from bzrlib.symbol_versioning import (
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# TODO: Report back as changes are merged in
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def transform_tree(from_tree, to_tree, interesting_ids=None):
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merge_inner(from_tree.branch, to_tree, from_tree, ignore_zero=True,
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interesting_ids=interesting_ids, this_tree=from_tree)
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from_tree.lock_tree_write()
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operation = cleanup.OperationWithCleanups(merge_inner)
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operation.add_cleanup(from_tree.unlock)
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operation.run_simple(from_tree.branch, to_tree, from_tree,
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ignore_zero=True, interesting_ids=interesting_ids, this_tree=from_tree)
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class MergeHooks(hooks.Hooks):
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hooks.Hooks.__init__(self, "bzrlib.merge", "Merger.hooks")
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self.add_hook('merge_file_content',
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"Called with a bzrlib.merge.Merger object to create a per file "
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"merge object when starting a merge. "
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"Should return either None or a subclass of "
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"``bzrlib.merge.AbstractPerFileMerger``. "
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"Such objects will then be called per file "
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"that needs to be merged (including when one "
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"side has deleted the file and the other has changed it). "
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"See the AbstractPerFileMerger API docs for details on how it is "
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class AbstractPerFileMerger(object):
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"""PerFileMerger objects are used by plugins extending merge for bzrlib.
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See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
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:ivar merger: The Merge3Merger performing the merge.
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def __init__(self, merger):
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"""Create a PerFileMerger for use with merger."""
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def merge_contents(self, merge_params):
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"""Attempt to merge the contents of a single file.
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:param merge_params: A bzrlib.merge.MergeHookParams
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:return: A tuple of (status, chunks), where status is one of
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'not_applicable', 'success', 'conflicted', or 'delete'. If status
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is 'success' or 'conflicted', then chunks should be an iterable of
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strings for the new file contents.
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return ('not applicable', None)
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class PerFileMerger(AbstractPerFileMerger):
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"""Merge individual files when self.file_matches returns True.
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This class is intended to be subclassed. The file_matches and
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merge_matching methods should be overridden with concrete implementations.
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def file_matches(self, params):
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"""Return True if merge_matching should be called on this file.
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Only called with merges of plain files with no clear winner.
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Subclasses must override this.
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raise NotImplementedError(self.file_matches)
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def get_filename(self, params, tree):
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"""Lookup the filename (i.e. basename, not path), given a Tree (e.g.
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self.merger.this_tree) and a MergeHookParams.
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return osutils.basename(tree.id2path(params.file_id))
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def get_filepath(self, params, tree):
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"""Calculate the path to the file in a tree.
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:param params: A MergeHookParams describing the file to merge
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:param tree: a Tree, e.g. self.merger.this_tree.
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return tree.id2path(params.file_id)
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def merge_contents(self, params):
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"""Merge the contents of a single file."""
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# Check whether this custom merge logic should be used.
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# OTHER is a straight winner, rely on default merge.
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params.winner == 'other' or
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# THIS and OTHER aren't both files.
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not params.is_file_merge() or
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# The filename doesn't match *.xml
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not self.file_matches(params)):
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return 'not_applicable', None
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return self.merge_matching(params)
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def merge_matching(self, params):
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"""Merge the contents of a single file that has matched the criteria
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in PerFileMerger.merge_contents (is a conflict, is a file,
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self.file_matches is True).
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Subclasses must override this.
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raise NotImplementedError(self.merge_matching)
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class ConfigurableFileMerger(PerFileMerger):
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"""Merge individual files when configured via a .conf file.
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This is a base class for concrete custom file merging logic. Concrete
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classes should implement ``merge_text``.
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See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
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:ivar affected_files: The configured file paths to merge.
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:cvar name_prefix: The prefix to use when looking up configuration
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details. <name_prefix>_merge_files describes the files targeted by the
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:cvar default_files: The default file paths to merge when no configuration
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def __init__(self, merger):
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super(ConfigurableFileMerger, self).__init__(merger)
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self.affected_files = None
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self.default_files = self.__class__.default_files or []
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self.name_prefix = self.__class__.name_prefix
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if self.name_prefix is None:
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raise ValueError("name_prefix must be set.")
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def file_matches(self, params):
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"""Check whether the file should call the merge hook.
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<name_prefix>_merge_files configuration variable is a list of files
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that should use the hook.
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affected_files = self.affected_files
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if affected_files is None:
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config = self.merger.this_branch.get_config()
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# Until bzr provides a better policy for caching the config, we
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# just add the part we're interested in to the params to avoid
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# reading the config files repeatedly (bazaar.conf, location.conf,
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config_key = self.name_prefix + '_merge_files'
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affected_files = config.get_user_option_as_list(config_key)
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if affected_files is None:
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# If nothing was specified in the config, use the default.
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affected_files = self.default_files
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self.affected_files = affected_files
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filepath = self.get_filepath(params, self.merger.this_tree)
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if filepath in affected_files:
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def merge_matching(self, params):
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return self.merge_text(params)
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def merge_text(self, params):
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"""Merge the byte contents of a single file.
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This is called after checking that the merge should be performed in
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merge_contents, and it should behave as per
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``bzrlib.merge.AbstractPerFileMerger.merge_contents``.
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raise NotImplementedError(self.merge_text)
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class MergeHookParams(object):
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"""Object holding parameters passed to merge_file_content hooks.
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There are some fields hooks can access:
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:ivar file_id: the file ID of the file being merged
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:ivar trans_id: the transform ID for the merge of this file
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:ivar this_kind: kind of file_id in 'this' tree
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:ivar other_kind: kind of file_id in 'other' tree
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:ivar winner: one of 'this', 'other', 'conflict'
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def __init__(self, merger, file_id, trans_id, this_kind, other_kind,
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self._merger = merger
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self.file_id = file_id
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self.trans_id = trans_id
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self.this_kind = this_kind
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self.other_kind = other_kind
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def is_file_merge(self):
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"""True if this_kind and other_kind are both 'file'."""
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return self.this_kind == 'file' and self.other_kind == 'file'
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@decorators.cachedproperty
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def base_lines(self):
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"""The lines of the 'base' version of the file."""
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return self._merger.get_lines(self._merger.base_tree, self.file_id)
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@decorators.cachedproperty
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def this_lines(self):
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"""The lines of the 'this' version of the file."""
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return self._merger.get_lines(self._merger.this_tree, self.file_id)
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@decorators.cachedproperty
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def other_lines(self):
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"""The lines of the 'other' version of the file."""
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return self._merger.get_lines(self._merger.other_tree, self.file_id)
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class Merger(object):
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def __init__(self, this_branch, other_tree=None, base_tree=None,
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this_tree=None, pb=DummyProgress(), change_reporter=None,
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this_tree=None, pb=None, change_reporter=None,
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recurse='down', revision_graph=None):
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object.__init__(self)
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self.this_branch = this_branch
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if self.other_rev_id is None:
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other_basis_tree = self.revision_tree(self.other_basis)
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changes = other_basis_tree.changes_from(self.other_tree)
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if changes.has_changed():
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raise WorkingTreeNotRevision(self.this_tree)
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if other_basis_tree.has_changes(self.other_tree):
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raise errors.WorkingTreeNotRevision(self.this_tree)
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other_rev_id = self.other_basis
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self.other_tree = other_basis_tree
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@deprecated_method(deprecated_in((2, 1, 0)))
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def file_revisions(self, file_id):
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self.ensure_revision_trees()
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def get_id(tree, file_id):
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revision_id = tree.inventory[file_id].revision
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if self.this_rev_id is None:
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if self.this_basis_tree.get_file_sha1(file_id) != \
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self.this_tree.get_file_sha1(file_id):
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raise WorkingTreeNotRevision(self.this_tree)
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raise errors.WorkingTreeNotRevision(self.this_tree)
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trees = (self.this_basis_tree, self.other_tree)
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return [get_id(tree, file_id) for tree in trees]
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return [tree.get_file_revision(file_id) for tree in trees]
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@deprecated_method(deprecated_in((2, 1, 0)))
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def check_basis(self, check_clean, require_commits=True):
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if self.this_basis is None and require_commits is True:
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raise BzrCommandError("This branch has no commits."
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" (perhaps you would prefer 'bzr pull')")
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raise errors.BzrCommandError(
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"This branch has no commits."
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" (perhaps you would prefer 'bzr pull')")
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self.compare_basis()
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if self.this_basis != self.this_rev_id:
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raise errors.UncommittedChanges(self.this_tree)
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@deprecated_method(deprecated_in((2, 1, 0)))
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def compare_basis(self):
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basis_tree = self.revision_tree(self.this_tree.last_revision())
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except errors.NoSuchRevision:
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basis_tree = self.this_tree.basis_tree()
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changes = self.this_tree.changes_from(basis_tree)
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if not changes.has_changed():
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if not self.this_tree.has_changes(basis_tree):
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self.this_rev_id = self.this_basis
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def set_interesting_files(self, file_list):
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self.interesting_files = file_list
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def set_pending(self):
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if not self.base_is_ancestor or not self.base_is_other_ancestor or self.other_rev_id is None:
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if (not self.base_is_ancestor or not self.base_is_other_ancestor
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or self.other_rev_id is None):
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self._add_parent()
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def _add_parent(self):
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new_parents = self.this_tree.get_parent_ids() + [self.other_rev_id]
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new_parent_trees = []
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operation = cleanup.OperationWithCleanups(
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self.this_tree.set_parent_trees)
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for revision_id in new_parents:
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tree = self.revision_tree(revision_id)
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target.fetch(source, revision_id)
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def find_base(self):
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revisions = [ensure_null(self.this_basis),
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ensure_null(self.other_basis)]
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if NULL_REVISION in revisions:
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self.base_rev_id = NULL_REVISION
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revisions = [_mod_revision.ensure_null(self.this_basis),
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_mod_revision.ensure_null(self.other_basis)]
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if _mod_revision.NULL_REVISION in revisions:
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self.base_rev_id = _mod_revision.NULL_REVISION
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self.base_tree = self.revision_tree(self.base_rev_id)
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self._is_criss_cross = False
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self.base_rev_id, steps = self.revision_graph.find_unique_lca(
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revisions[0], revisions[1], count_steps=True)
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if self.base_rev_id == NULL_REVISION:
360
raise UnrelatedBranches()
362
warning('Warning: criss-cross merge encountered. See bzr'
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' help criss-cross.')
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self.base_tree = self.revision_tree(self.base_rev_id)
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lcas = self.revision_graph.find_lca(revisions[0], revisions[1])
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self._is_criss_cross = False
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self.base_rev_id = _mod_revision.NULL_REVISION
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self.base_rev_id = list(lcas)[0]
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else: # len(lcas) > 1
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self._is_criss_cross = True
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# find_unique_lca can only handle 2 nodes, so we have to
586
# start back at the beginning. It is a shame to traverse
587
# the graph again, but better than re-implementing
589
self.base_rev_id = self.revision_graph.find_unique_lca(
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revisions[0], revisions[1])
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self.base_rev_id = self.revision_graph.find_unique_lca(
594
sorted_lca_keys = self.revision_graph.find_merge_order(
596
if self.base_rev_id == _mod_revision.NULL_REVISION:
597
self.base_rev_id = sorted_lca_keys[0]
599
if self.base_rev_id == _mod_revision.NULL_REVISION:
600
raise errors.UnrelatedBranches()
601
if self._is_criss_cross:
602
trace.warning('Warning: criss-cross merge encountered. See bzr'
603
' help criss-cross.')
604
trace.mutter('Criss-cross lcas: %r' % lcas)
605
if self.base_rev_id in lcas:
606
trace.mutter('Unable to find unique lca. '
607
'Fallback %r as best option.' % self.base_rev_id)
608
interesting_revision_ids = set(lcas)
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interesting_revision_ids.add(self.base_rev_id)
610
interesting_trees = dict((t.get_revision_id(), t)
611
for t in self.this_branch.repository.revision_trees(
612
interesting_revision_ids))
613
self._cached_trees.update(interesting_trees)
614
if self.base_rev_id in lcas:
615
self.base_tree = interesting_trees[self.base_rev_id]
617
self.base_tree = interesting_trees.pop(self.base_rev_id)
618
self._lca_trees = [interesting_trees[key]
619
for key in sorted_lca_keys]
621
self.base_tree = self.revision_tree(self.base_rev_id)
365
622
self.base_is_ancestor = True
366
623
self.base_is_other_ancestor = True
624
trace.mutter('Base revid: %r' % self.base_rev_id)
368
626
def set_base(self, base_revision):
369
627
"""Set the base revision to use for the merge.
371
629
:param base_revision: A 2-list containing a path and revision number.
373
mutter("doing merge() with no base_revision specified")
631
trace.mutter("doing merge() with no base_revision specified")
374
632
if base_revision == [None, None]:
389
647
'other_tree': self.other_tree,
390
648
'interesting_ids': self.interesting_ids,
391
649
'interesting_files': self.interesting_files,
650
'this_branch': self.this_branch,
393
651
'do_merge': False}
394
652
if self.merge_type.requires_base:
395
653
kwargs['base_tree'] = self.base_tree
396
654
if self.merge_type.supports_reprocess:
397
655
kwargs['reprocess'] = self.reprocess
398
656
elif self.reprocess:
399
raise BzrError("Conflict reduction is not supported for merge"
400
" type %s." % self.merge_type)
657
raise errors.BzrError(
658
"Conflict reduction is not supported for merge"
659
" type %s." % self.merge_type)
401
660
if self.merge_type.supports_show_base:
402
661
kwargs['show_base'] = self.show_base
403
662
elif self.show_base:
404
raise BzrError("Showing base is not supported for this"
405
" merge type. %s" % self.merge_type)
663
raise errors.BzrError("Showing base is not supported for this"
664
" merge type. %s" % self.merge_type)
406
665
if (not getattr(self.merge_type, 'supports_reverse_cherrypick', True)
407
666
and not self.base_is_other_ancestor):
408
667
raise errors.CannotReverseCherrypick()
409
668
if self.merge_type.supports_cherrypick:
410
669
kwargs['cherrypick'] = (not self.base_is_ancestor or
411
670
not self.base_is_other_ancestor)
412
return self.merge_type(pb=self._pb,
671
if self._is_criss_cross and getattr(self.merge_type,
672
'supports_lca_trees', False):
673
kwargs['lca_trees'] = self._lca_trees
674
return self.merge_type(pb=None,
413
675
change_reporter=self.change_reporter,
416
def _do_merge_to(self, merge):
678
def _do_merge_to(self):
679
merge = self.make_merger()
680
if self.other_branch is not None:
681
self.other_branch.update_references(self.this_branch)
418
683
if self.recurse == 'down':
419
684
for relpath, file_id in self.this_tree.iter_references():
469
745
supports_cherrypick = True
470
746
supports_reverse_cherrypick = True
471
747
winner_idx = {"this": 2, "other": 1, "conflict": 1}
748
supports_lca_trees = True
473
def __init__(self, working_tree, this_tree, base_tree, other_tree,
750
def __init__(self, working_tree, this_tree, base_tree, other_tree,
474
751
interesting_ids=None, reprocess=False, show_base=False,
475
pb=DummyProgress(), pp=None, change_reporter=None,
752
pb=None, pp=None, change_reporter=None,
476
753
interesting_files=None, do_merge=True,
754
cherrypick=False, lca_trees=None, this_branch=None):
478
755
"""Initialize the merger object and perform the merge.
480
757
:param working_tree: The working tree to apply the merge to
481
758
:param this_tree: The local tree in the merge operation
482
759
:param base_tree: The common tree in the merge operation
483
:param other_tree: The other other tree to merge changes from
760
:param other_tree: The other tree to merge changes from
761
:param this_branch: The branch associated with this_tree. Defaults to
762
this_tree.branch if not supplied.
484
763
:param interesting_ids: The file_ids of files that should be
485
764
participate in the merge. May not be combined with
486
765
interesting_files.
487
766
:param: reprocess If True, perform conflict-reduction processing.
488
767
:param show_base: If True, show the base revision in text conflicts.
489
768
(incompatible with reprocess)
490
:param pb: A Progress bar
491
770
:param pp: A ProgressPhase object
492
771
:param change_reporter: An object that should report changes made
493
772
:param interesting_files: The tree-relative paths of files that should
496
775
be combined with interesting_ids. If neither interesting_files nor
497
776
interesting_ids is specified, all files may participate in the
778
:param lca_trees: Can be set to a dictionary of {revision_id:rev_tree}
779
if the ancestry was found to include a criss-cross merge.
780
Otherwise should be None.
500
782
object.__init__(self)
501
783
if interesting_files is not None and interesting_ids is not None:
502
784
raise ValueError(
503
785
'specify either interesting_ids or interesting_files')
786
if this_branch is None:
787
this_branch = this_tree.branch
504
788
self.interesting_ids = interesting_ids
505
789
self.interesting_files = interesting_files
506
790
self.this_tree = working_tree
507
791
self.base_tree = base_tree
508
792
self.other_tree = other_tree
793
self.this_branch = this_branch
509
794
self._raw_conflicts = []
510
795
self.cooked_conflicts = []
511
796
self.reprocess = reprocess
512
797
self.show_base = show_base
798
self._lca_trees = lca_trees
799
# Uncommenting this will change the default algorithm to always use
800
# _entries_lca. This can be useful for running the test suite and
801
# making sure we haven't missed any corner cases.
802
# if lca_trees is None:
803
# self._lca_trees = [self.base_tree]
515
804
self.change_reporter = change_reporter
516
805
self.cherrypick = cherrypick
518
self.pp = ProgressPhase("Merge phase", 3, self.pb)
809
warnings.warn("pp argument to Merge3Merger is deprecated")
811
warnings.warn("pb argument to Merge3Merger is deprecated")
522
813
def do_merge(self):
814
operation = cleanup.OperationWithCleanups(self._do_merge)
523
815
self.this_tree.lock_tree_write()
816
operation.add_cleanup(self.this_tree.unlock)
524
817
self.base_tree.lock_read()
818
operation.add_cleanup(self.base_tree.unlock)
525
819
self.other_tree.lock_read()
526
self.tt = TreeTransform(self.this_tree, self.pb)
820
operation.add_cleanup(self.other_tree.unlock)
823
def _do_merge(self, operation):
824
self.tt = transform.TreeTransform(self.this_tree, None)
825
operation.add_cleanup(self.tt.finalize)
826
self._compute_transform()
827
results = self.tt.apply(no_conflicts=True)
828
self.write_modified(results)
529
self._compute_transform()
531
results = self.tt.apply(no_conflicts=True)
532
self.write_modified(results)
534
self.this_tree.add_conflicts(self.cooked_conflicts)
535
except UnsupportedOperation:
539
self.other_tree.unlock()
540
self.base_tree.unlock()
541
self.this_tree.unlock()
830
self.this_tree.add_conflicts(self.cooked_conflicts)
831
except errors.UnsupportedOperation:
544
834
def make_preview_transform(self):
835
operation = cleanup.OperationWithCleanups(self._make_preview_transform)
545
836
self.base_tree.lock_read()
837
operation.add_cleanup(self.base_tree.unlock)
546
838
self.other_tree.lock_read()
547
self.tt = TransformPreview(self.this_tree)
550
self._compute_transform()
553
self.other_tree.unlock()
554
self.base_tree.unlock()
839
operation.add_cleanup(self.other_tree.unlock)
840
return operation.run_simple()
842
def _make_preview_transform(self):
843
self.tt = transform.TransformPreview(self.this_tree)
844
self._compute_transform()
558
847
def _compute_transform(self):
559
entries = self._entries3()
848
if self._lca_trees is None:
849
entries = self._entries3()
850
resolver = self._three_way
852
entries = self._entries_lca()
853
resolver = self._lca_multi_way
560
854
child_pb = ui.ui_factory.nested_progress_bar()
856
factories = Merger.hooks['merge_file_content']
857
hooks = [factory(self) for factory in factories] + [self]
858
self.active_hooks = [hook for hook in hooks if hook is not None]
562
859
for num, (file_id, changed, parents3, names3,
563
860
executable3) in enumerate(entries):
564
861
child_pb.update('Preparing file merge', num, len(entries))
565
self._merge_names(file_id, parents3, names3)
862
self._merge_names(file_id, parents3, names3, resolver=resolver)
567
file_status = self.merge_contents(file_id)
864
file_status = self._do_merge_contents(file_id)
569
866
file_status = 'unmodified'
570
867
self._merge_executable(file_id,
571
executable3, file_status)
868
executable3, file_status, resolver=resolver)
573
870
child_pb.finished()
871
self.tt.fixup_new_roots()
872
self._finish_computing_transform()
874
def _finish_computing_transform(self):
875
"""Finalize the transform and report the changes.
877
This is the second half of _compute_transform.
576
879
child_pb = ui.ui_factory.nested_progress_bar()
578
fs_conflicts = resolve_conflicts(self.tt, child_pb,
579
lambda t, c: conflict_pass(t, c, self.other_tree))
881
fs_conflicts = transform.resolve_conflicts(self.tt, child_pb,
882
lambda t, c: transform.conflict_pass(t, c, self.other_tree))
581
884
child_pb.finished()
582
885
if self.change_reporter is not None:
620
926
result.append((file_id, changed, parents3, names3, executable3))
929
def _entries_lca(self):
930
"""Gather data about files modified between multiple trees.
932
This compares OTHER versus all LCA trees, and for interesting entries,
933
it then compares with THIS and BASE.
935
For the multi-valued entries, the format will be (BASE, [lca1, lca2])
937
:return: [(file_id, changed, parents, names, executable)], where:
939
* file_id: Simple file_id of the entry
940
* changed: Boolean, True if the kind or contents changed else False
941
* parents: ((base, [parent_id, in, lcas]), parent_id_other,
943
* names: ((base, [name, in, lcas]), name_in_other, name_in_this)
944
* executable: ((base, [exec, in, lcas]), exec_in_other,
947
if self.interesting_files is not None:
948
lookup_trees = [self.this_tree, self.base_tree]
949
lookup_trees.extend(self._lca_trees)
950
# I think we should include the lca trees as well
951
interesting_ids = self.other_tree.paths2ids(self.interesting_files,
954
interesting_ids = self.interesting_ids
956
walker = _mod_tree.MultiWalker(self.other_tree, self._lca_trees)
958
base_inventory = self.base_tree.inventory
959
this_inventory = self.this_tree.inventory
960
for path, file_id, other_ie, lca_values in walker.iter_all():
961
# Is this modified at all from any of the other trees?
963
other_ie = _none_entry
964
if interesting_ids is not None and file_id not in interesting_ids:
967
# If other_revision is found in any of the lcas, that means this
968
# node is uninteresting. This is because when merging, if there are
969
# multiple heads(), we have to create a new node. So if we didn't,
970
# we know that the ancestry is linear, and that OTHER did not
972
# See doc/developers/lca_merge_resolution.txt for details
973
other_revision = other_ie.revision
974
if other_revision is not None:
975
# We can't use this shortcut when other_revision is None,
976
# because it may be None because things are WorkingTrees, and
977
# not because it is *actually* None.
978
is_unmodified = False
979
for lca_path, ie in lca_values:
980
if ie is not None and ie.revision == other_revision:
987
for lca_path, lca_ie in lca_values:
989
lca_entries.append(_none_entry)
991
lca_entries.append(lca_ie)
993
if base_inventory.has_id(file_id):
994
base_ie = base_inventory[file_id]
996
base_ie = _none_entry
998
if this_inventory.has_id(file_id):
999
this_ie = this_inventory[file_id]
1001
this_ie = _none_entry
1007
for lca_ie in lca_entries:
1008
lca_kinds.append(lca_ie.kind)
1009
lca_parent_ids.append(lca_ie.parent_id)
1010
lca_names.append(lca_ie.name)
1011
lca_executable.append(lca_ie.executable)
1013
kind_winner = self._lca_multi_way(
1014
(base_ie.kind, lca_kinds),
1015
other_ie.kind, this_ie.kind)
1016
parent_id_winner = self._lca_multi_way(
1017
(base_ie.parent_id, lca_parent_ids),
1018
other_ie.parent_id, this_ie.parent_id)
1019
name_winner = self._lca_multi_way(
1020
(base_ie.name, lca_names),
1021
other_ie.name, this_ie.name)
1023
content_changed = True
1024
if kind_winner == 'this':
1025
# No kind change in OTHER, see if there are *any* changes
1026
if other_ie.kind == 'directory':
1027
if parent_id_winner == 'this' and name_winner == 'this':
1028
# No change for this directory in OTHER, skip
1030
content_changed = False
1031
elif other_ie.kind is None or other_ie.kind == 'file':
1032
def get_sha1(ie, tree):
1033
if ie.kind != 'file':
1035
return tree.get_file_sha1(file_id)
1036
base_sha1 = get_sha1(base_ie, self.base_tree)
1037
lca_sha1s = [get_sha1(ie, tree) for ie, tree
1038
in zip(lca_entries, self._lca_trees)]
1039
this_sha1 = get_sha1(this_ie, self.this_tree)
1040
other_sha1 = get_sha1(other_ie, self.other_tree)
1041
sha1_winner = self._lca_multi_way(
1042
(base_sha1, lca_sha1s), other_sha1, this_sha1,
1043
allow_overriding_lca=False)
1044
exec_winner = self._lca_multi_way(
1045
(base_ie.executable, lca_executable),
1046
other_ie.executable, this_ie.executable)
1047
if (parent_id_winner == 'this' and name_winner == 'this'
1048
and sha1_winner == 'this' and exec_winner == 'this'):
1049
# No kind, parent, name, exec, or content change for
1050
# OTHER, so this node is not considered interesting
1052
if sha1_winner == 'this':
1053
content_changed = False
1054
elif other_ie.kind == 'symlink':
1055
def get_target(ie, tree):
1056
if ie.kind != 'symlink':
1058
return tree.get_symlink_target(file_id)
1059
base_target = get_target(base_ie, self.base_tree)
1060
lca_targets = [get_target(ie, tree) for ie, tree
1061
in zip(lca_entries, self._lca_trees)]
1062
this_target = get_target(this_ie, self.this_tree)
1063
other_target = get_target(other_ie, self.other_tree)
1064
target_winner = self._lca_multi_way(
1065
(base_target, lca_targets),
1066
other_target, this_target)
1067
if (parent_id_winner == 'this' and name_winner == 'this'
1068
and target_winner == 'this'):
1069
# No kind, parent, name, or symlink target change
1072
if target_winner == 'this':
1073
content_changed = False
1074
elif other_ie.kind == 'tree-reference':
1075
# The 'changed' information seems to be handled at a higher
1076
# level. At least, _entries3 returns False for content
1077
# changed, even when at a new revision_id.
1078
content_changed = False
1079
if (parent_id_winner == 'this' and name_winner == 'this'):
1080
# Nothing interesting
1083
raise AssertionError('unhandled kind: %s' % other_ie.kind)
1085
# If we have gotten this far, that means something has changed
1086
result.append((file_id, content_changed,
1087
((base_ie.parent_id, lca_parent_ids),
1088
other_ie.parent_id, this_ie.parent_id),
1089
((base_ie.name, lca_names),
1090
other_ie.name, this_ie.name),
1091
((base_ie.executable, lca_executable),
1092
other_ie.executable, this_ie.executable)
1096
@deprecated_method(deprecated_in((2, 4, 0)))
623
1097
def fix_root(self):
625
self.tt.final_kind(self.tt.root)
1098
if self.tt.final_kind(self.tt.root) is None:
627
1099
self.tt.cancel_deletion(self.tt.root)
628
1100
if self.tt.final_file_id(self.tt.root) is None:
629
self.tt.version_file(self.tt.tree_file_id(self.tt.root),
1101
self.tt.version_file(self.tt.tree_file_id(self.tt.root),
631
if self.other_tree.inventory.root is None:
633
1103
other_root_file_id = self.other_tree.get_root_id()
1104
if other_root_file_id is None:
634
1106
other_root = self.tt.trans_id_file_id(other_root_file_id)
635
1107
if other_root == self.tt.root:
638
self.tt.final_kind(other_root)
641
if self.other_tree.inventory.root.file_id in self.this_tree.inventory:
642
# the other tree's root is a non-root in the current tree
644
self.reparent_children(self.other_tree.inventory.root, self.tt.root)
645
self.tt.cancel_creation(other_root)
646
self.tt.cancel_versioning(other_root)
648
def reparent_children(self, ie, target):
649
for thing, child in ie.children.iteritems():
1109
if self.this_tree.inventory.has_id(
1110
self.other_tree.inventory.root.file_id):
1111
# the other tree's root is a non-root in the current tree (as
1112
# when a previously unrelated branch is merged into another)
1114
if self.tt.final_kind(other_root) is not None:
1115
other_root_is_present = True
1117
# other_root doesn't have a physical representation. We still need
1118
# to move any references to the actual root of the tree.
1119
other_root_is_present = False
1120
# 'other_tree.inventory.root' is not present in this tree. We are
1121
# calling adjust_path for children which *want* to be present with a
1122
# correct place to go.
1123
for _, child in self.other_tree.inventory.root.children.iteritems():
650
1124
trans_id = self.tt.trans_id_file_id(child.file_id)
651
self.tt.adjust_path(self.tt.final_name(trans_id), target, trans_id)
1125
if not other_root_is_present:
1126
if self.tt.final_kind(trans_id) is not None:
1127
# The item exist in the final tree and has a defined place
1130
# Move the item into the root
1132
final_name = self.tt.final_name(trans_id)
1133
except errors.NoFinalPath:
1134
# This file is not present anymore, ignore it.
1136
self.tt.adjust_path(final_name, self.tt.root, trans_id)
1137
if other_root_is_present:
1138
self.tt.cancel_creation(other_root)
1139
self.tt.cancel_versioning(other_root)
653
1141
def write_modified(self, results):
654
1142
modified_hashes = {}
696
1184
def kind(tree, file_id):
697
1185
"""Determine the kind of a file-id (used as a key method)."""
698
if file_id not in tree:
1186
if not tree.has_id(file_id):
700
1188
return tree.kind(file_id)
703
1191
def _three_way(base, other, this):
704
#if base == other, either they all agree, or only THIS has changed.
705
1192
if base == other:
1193
# if 'base == other', either they all agree, or only 'this' has
707
1196
elif this not in (base, other):
1197
# 'this' is neither 'base' nor 'other', so both sides changed
708
1198
return 'conflict'
709
# "Ambiguous clean merge" -- both sides have made the same change.
710
1199
elif this == other:
1200
# "Ambiguous clean merge" -- both sides have made the same change.
712
# this == base: only other has changed.
1203
# this == base: only other has changed.
1207
def _lca_multi_way(bases, other, this, allow_overriding_lca=True):
1208
"""Consider LCAs when determining whether a change has occurred.
1210
If LCAS are all identical, this is the same as a _three_way comparison.
1212
:param bases: value in (BASE, [LCAS])
1213
:param other: value in OTHER
1214
:param this: value in THIS
1215
:param allow_overriding_lca: If there is more than one unique lca
1216
value, allow OTHER to override THIS if it has a new value, and
1217
THIS only has an lca value, or vice versa. This is appropriate for
1218
truly scalar values, not as much for non-scalars.
1219
:return: 'this', 'other', or 'conflict' depending on whether an entry
1222
# See doc/developers/lca_tree_merging.txt for details about this
1225
# Either Ambiguously clean, or nothing was actually changed. We
1228
base_val, lca_vals = bases
1229
# Remove 'base_val' from the lca_vals, because it is not interesting
1230
filtered_lca_vals = [lca_val for lca_val in lca_vals
1231
if lca_val != base_val]
1232
if len(filtered_lca_vals) == 0:
1233
return Merge3Merger._three_way(base_val, other, this)
1235
unique_lca_vals = set(filtered_lca_vals)
1236
if len(unique_lca_vals) == 1:
1237
return Merge3Merger._three_way(unique_lca_vals.pop(), other, this)
1239
if allow_overriding_lca:
1240
if other in unique_lca_vals:
1241
if this in unique_lca_vals:
1242
# Each side picked a different lca, conflict
1245
# This has a value which supersedes both lca values, and
1246
# other only has an lca value
1248
elif this in unique_lca_vals:
1249
# OTHER has a value which supersedes both lca values, and this
1250
# only has an lca value
1253
# At this point, the lcas disagree, and the tip disagree
1257
@deprecated_method(deprecated_in((2, 2, 0)))
717
1258
def scalar_three_way(this_tree, base_tree, other_tree, file_id, key):
718
1259
"""Do a three-way test on a scalar.
719
1260
Return "this", "other" or "conflict", depending whether a value wins.
768
1310
parent_id_winner = "other"
769
1311
if name_winner == "this" and parent_id_winner == "this":
771
if name_winner == "conflict":
772
trans_id = self.tt.trans_id_file_id(file_id)
773
self._raw_conflicts.append(('name conflict', trans_id,
774
this_name, other_name))
775
if parent_id_winner == "conflict":
776
trans_id = self.tt.trans_id_file_id(file_id)
777
self._raw_conflicts.append(('parent conflict', trans_id,
778
this_parent, other_parent))
779
if other_name is None:
780
# it doesn't matter whether the result was 'other' or
781
# 'conflict'-- if there's no 'other', we leave it alone.
1313
if name_winner == 'conflict' or parent_id_winner == 'conflict':
1314
# Creating helpers (.OTHER or .THIS) here cause problems down the
1315
# road if a ContentConflict needs to be created so we should not do
1317
trans_id = self.tt.trans_id_file_id(file_id)
1318
self._raw_conflicts.append(('path conflict', trans_id, file_id,
1319
this_parent, this_name,
1320
other_parent, other_name))
1321
if not self.other_tree.has_id(file_id):
1322
# it doesn't matter whether the result was 'other' or
1323
# 'conflict'-- if it has no file id, we leave it alone.
783
# if we get here, name_winner and parent_winner are set to safe values.
784
trans_id = self.tt.trans_id_file_id(file_id)
785
1325
parent_id = parents[self.winner_idx[parent_id_winner]]
786
if parent_id is not None:
787
parent_trans_id = self.tt.trans_id_file_id(parent_id)
788
self.tt.adjust_path(names[self.winner_idx[name_winner]],
789
parent_trans_id, trans_id)
1326
name = names[self.winner_idx[name_winner]]
1327
if parent_id is not None or name is not None:
1328
# if we get here, name_winner and parent_winner are set to safe
1330
if parent_id is None and name is not None:
1331
# if parent_id is None and name is non-None, current file is
1333
if names[self.winner_idx[parent_id_winner]] != '':
1334
raise AssertionError(
1335
'File looks like a root, but named %s' %
1336
names[self.winner_idx[parent_id_winner]])
1337
parent_trans_id = transform.ROOT_PARENT
1339
parent_trans_id = self.tt.trans_id_file_id(parent_id)
1340
self.tt.adjust_path(name, parent_trans_id,
1341
self.tt.trans_id_file_id(file_id))
791
def merge_contents(self, file_id):
792
"""Performa a merge on file_id contents."""
1343
def _do_merge_contents(self, file_id):
1344
"""Performs a merge on file_id contents."""
793
1345
def contents_pair(tree):
794
if file_id not in tree:
1346
if not tree.has_id(file_id):
795
1347
return (None, None)
796
1348
kind = tree.kind(file_id)
797
1349
if kind == "file":
803
1355
return kind, contents
805
def contents_conflict():
806
trans_id = self.tt.trans_id_file_id(file_id)
807
name = self.tt.final_name(trans_id)
808
parent_id = self.tt.final_parent(trans_id)
809
if file_id in self.this_tree.inventory:
810
self.tt.unversion_file(trans_id)
811
if file_id in self.this_tree:
812
self.tt.delete_contents(trans_id)
813
file_group = self._dump_conflicts(name, parent_id, file_id,
815
self._raw_conflicts.append(('contents conflict', file_group))
817
1357
# See SPOT run. run, SPOT, run.
818
1358
# So we're not QUITE repeating ourselves; we do tricky things with
820
1360
base_pair = contents_pair(self.base_tree)
821
1361
other_pair = contents_pair(self.other_tree)
822
if base_pair == other_pair:
823
# OTHER introduced no changes
825
this_pair = contents_pair(self.this_tree)
826
if this_pair == other_pair:
827
# THIS and OTHER introduced the same changes
830
trans_id = self.tt.trans_id_file_id(file_id)
831
if this_pair == base_pair:
832
# only OTHER introduced changes
833
if file_id in self.this_tree:
834
# Remove any existing contents
835
self.tt.delete_contents(trans_id)
836
if file_id in self.other_tree:
837
# OTHER changed the file
838
create_by_entry(self.tt,
839
self.other_tree.inventory[file_id],
840
self.other_tree, trans_id)
841
if file_id not in self.this_tree.inventory:
842
self.tt.version_file(file_id, trans_id)
844
elif file_id in self.this_tree.inventory:
845
# OTHER deleted the file
846
self.tt.unversion_file(trans_id)
848
#BOTH THIS and OTHER introduced changes; scalar conflict
849
elif this_pair[0] == "file" and other_pair[0] == "file":
850
# THIS and OTHER are both files, so text merge. Either
851
# BASE is a file, or both converted to files, so at least we
852
# have agreement that output should be a file.
854
self.text_merge(file_id, trans_id)
856
return contents_conflict()
857
if file_id not in self.this_tree.inventory:
858
self.tt.version_file(file_id, trans_id)
860
self.tt.tree_kind(trans_id)
861
self.tt.delete_contents(trans_id)
866
# Scalar conflict, can't text merge. Dump conflicts
867
return contents_conflict()
1363
this_pair = contents_pair(self.this_tree)
1364
lca_pairs = [contents_pair(tree) for tree in self._lca_trees]
1365
winner = self._lca_multi_way((base_pair, lca_pairs), other_pair,
1366
this_pair, allow_overriding_lca=False)
1368
if base_pair == other_pair:
1371
# We delayed evaluating this_pair as long as we can to avoid
1372
# unnecessary sha1 calculation
1373
this_pair = contents_pair(self.this_tree)
1374
winner = self._three_way(base_pair, other_pair, this_pair)
1375
if winner == 'this':
1376
# No interesting changes introduced by OTHER
1378
# We have a hypothetical conflict, but if we have files, then we
1379
# can try to merge the content
1380
trans_id = self.tt.trans_id_file_id(file_id)
1381
params = MergeHookParams(self, file_id, trans_id, this_pair[0],
1382
other_pair[0], winner)
1383
hooks = self.active_hooks
1384
hook_status = 'not_applicable'
1386
hook_status, lines = hook.merge_contents(params)
1387
if hook_status != 'not_applicable':
1388
# Don't try any more hooks, this one applies.
1391
if hook_status == 'not_applicable':
1392
# This is a contents conflict, because none of the available
1393
# functions could merge it.
1395
name = self.tt.final_name(trans_id)
1396
parent_id = self.tt.final_parent(trans_id)
1397
if self.this_tree.has_id(file_id):
1398
self.tt.unversion_file(trans_id)
1399
file_group = self._dump_conflicts(name, parent_id, file_id,
1401
self._raw_conflicts.append(('contents conflict', file_group))
1402
elif hook_status == 'success':
1403
self.tt.create_file(lines, trans_id)
1404
elif hook_status == 'conflicted':
1405
# XXX: perhaps the hook should be able to provide
1406
# the BASE/THIS/OTHER files?
1407
self.tt.create_file(lines, trans_id)
1408
self._raw_conflicts.append(('text conflict', trans_id))
1409
name = self.tt.final_name(trans_id)
1410
parent_id = self.tt.final_parent(trans_id)
1411
self._dump_conflicts(name, parent_id, file_id)
1412
elif hook_status == 'delete':
1413
self.tt.unversion_file(trans_id)
1415
elif hook_status == 'done':
1416
# The hook function did whatever it needs to do directly, no
1417
# further action needed here.
1420
raise AssertionError('unknown hook_status: %r' % (hook_status,))
1421
if not self.this_tree.has_id(file_id) and result == "modified":
1422
self.tt.version_file(file_id, trans_id)
1423
# The merge has been performed, so the old contents should not be
1425
self.tt.delete_contents(trans_id)
1428
def _default_other_winner_merge(self, merge_hook_params):
1429
"""Replace this contents with other."""
1430
file_id = merge_hook_params.file_id
1431
trans_id = merge_hook_params.trans_id
1432
file_in_this = self.this_tree.has_id(file_id)
1433
if self.other_tree.has_id(file_id):
1434
# OTHER changed the file
1436
if wt.supports_content_filtering():
1437
# We get the path from the working tree if it exists.
1438
# That fails though when OTHER is adding a file, so
1439
# we fall back to the other tree to find the path if
1440
# it doesn't exist locally.
1442
filter_tree_path = wt.id2path(file_id)
1443
except errors.NoSuchId:
1444
filter_tree_path = self.other_tree.id2path(file_id)
1446
# Skip the id2path lookup for older formats
1447
filter_tree_path = None
1448
transform.create_from_tree(self.tt, trans_id,
1449
self.other_tree, file_id,
1450
filter_tree_path=filter_tree_path)
1453
# OTHER deleted the file
1454
return 'delete', None
1456
raise AssertionError(
1457
'winner is OTHER, but file_id %r not in THIS or OTHER tree'
1460
def merge_contents(self, merge_hook_params):
1461
"""Fallback merge logic after user installed hooks."""
1462
# This function is used in merge hooks as the fallback instance.
1463
# Perhaps making this function and the functions it calls be a
1464
# a separate class would be better.
1465
if merge_hook_params.winner == 'other':
1466
# OTHER is a straight winner, so replace this contents with other
1467
return self._default_other_winner_merge(merge_hook_params)
1468
elif merge_hook_params.is_file_merge():
1469
# THIS and OTHER are both files, so text merge. Either
1470
# BASE is a file, or both converted to files, so at least we
1471
# have agreement that output should be a file.
1473
self.text_merge(merge_hook_params.file_id,
1474
merge_hook_params.trans_id)
1475
except errors.BinaryFile:
1476
return 'not_applicable', None
1479
return 'not_applicable', None
869
1481
def get_lines(self, tree, file_id):
870
1482
"""Return the lines in a file, or an empty list."""
872
return tree.get_file(file_id).readlines()
1483
if tree.has_id(file_id):
1484
return tree.get_file_lines(file_id)
925
1537
determined automatically. If set_version is true, the .OTHER, .THIS
926
1538
or .BASE (in that order) will be created as versioned files.
928
data = [('OTHER', self.other_tree, other_lines),
1540
data = [('OTHER', self.other_tree, other_lines),
929
1541
('THIS', self.this_tree, this_lines)]
931
1543
data.append(('BASE', self.base_tree, base_lines))
1545
# We need to use the actual path in the working tree of the file here,
1546
# ignoring the conflict suffixes
1548
if wt.supports_content_filtering():
1550
filter_tree_path = wt.id2path(file_id)
1551
except errors.NoSuchId:
1552
# file has been deleted
1553
filter_tree_path = None
1555
# Skip the id2path lookup for older formats
1556
filter_tree_path = None
932
1558
versioned = False
934
1560
for suffix, tree, lines in data:
1561
if tree.has_id(file_id):
936
1562
trans_id = self._conflict_file(name, parent_id, tree, file_id,
1563
suffix, lines, filter_tree_path)
938
1564
file_group.append(trans_id)
939
1565
if set_version and not versioned:
940
1566
self.tt.version_file(file_id, trans_id)
941
1567
versioned = True
942
1568
return file_group
944
def _conflict_file(self, name, parent_id, tree, file_id, suffix,
1570
def _conflict_file(self, name, parent_id, tree, file_id, suffix,
1571
lines=None, filter_tree_path=None):
946
1572
"""Emit a single conflict file."""
947
1573
name = name + '.' + suffix
948
1574
trans_id = self.tt.create_path(name, parent_id)
949
entry = tree.inventory[file_id]
950
create_by_entry(self.tt, entry, tree, trans_id, lines)
1575
transform.create_from_tree(self.tt, trans_id, tree, file_id, lines,
953
1579
def merge_executable(self, file_id, file_status):
954
1580
"""Perform a merge on the execute bit."""
955
1581
executable = [self.executable(t, file_id) for t in (self.base_tree,
956
1582
self.other_tree, self.this_tree)]
957
self._merge_executable(file_id, executable, file_status)
1583
self._merge_executable(file_id, executable, file_status,
1584
resolver=self._three_way)
959
def _merge_executable(self, file_id, executable, file_status):
1586
def _merge_executable(self, file_id, executable, file_status,
960
1588
"""Perform a merge on the execute bit."""
961
1589
base_executable, other_executable, this_executable = executable
962
1590
if file_status == "deleted":
964
winner = self._three_way(*executable)
1592
winner = resolver(*executable)
965
1593
if winner == "conflict":
966
1594
# There must be a None in here, if we have a conflict, but we
967
1595
# need executability since file status was not deleted.
993
1618
def cook_conflicts(self, fs_conflicts):
994
1619
"""Convert all conflicts into a form that doesn't depend on trans_id"""
995
from conflicts import Conflict
997
self.cooked_conflicts.extend(cook_conflicts(fs_conflicts, self.tt))
998
fp = FinalPaths(self.tt)
1620
content_conflict_file_ids = set()
1621
cooked_conflicts = transform.cook_conflicts(fs_conflicts, self.tt)
1622
fp = transform.FinalPaths(self.tt)
999
1623
for conflict in self._raw_conflicts:
1000
1624
conflict_type = conflict[0]
1001
if conflict_type in ('name conflict', 'parent conflict'):
1002
trans_id = conflict[1]
1003
conflict_args = conflict[2:]
1004
if trans_id not in name_conflicts:
1005
name_conflicts[trans_id] = {}
1006
unique_add(name_conflicts[trans_id], conflict_type,
1008
if conflict_type == 'contents conflict':
1625
if conflict_type == 'path conflict':
1627
this_parent, this_name,
1628
other_parent, other_name) = conflict[1:]
1629
if this_parent is None or this_name is None:
1630
this_path = '<deleted>'
1632
parent_path = fp.get_path(
1633
self.tt.trans_id_file_id(this_parent))
1634
this_path = osutils.pathjoin(parent_path, this_name)
1635
if other_parent is None or other_name is None:
1636
other_path = '<deleted>'
1638
if other_parent == self.other_tree.get_root_id():
1639
# The tree transform doesn't know about the other root,
1640
# so we special case here to avoid a NoFinalPath
1644
parent_path = fp.get_path(
1645
self.tt.trans_id_file_id(other_parent))
1646
other_path = osutils.pathjoin(parent_path, other_name)
1647
c = _mod_conflicts.Conflict.factory(
1648
'path conflict', path=this_path,
1649
conflict_path=other_path,
1651
elif conflict_type == 'contents conflict':
1009
1652
for trans_id in conflict[1]:
1010
1653
file_id = self.tt.final_file_id(trans_id)
1011
1654
if file_id is not None:
1015
1658
if path.endswith(suffix):
1016
1659
path = path[:-len(suffix)]
1018
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
1019
self.cooked_conflicts.append(c)
1020
if conflict_type == 'text conflict':
1661
c = _mod_conflicts.Conflict.factory(conflict_type,
1662
path=path, file_id=file_id)
1663
content_conflict_file_ids.add(file_id)
1664
elif conflict_type == 'text conflict':
1021
1665
trans_id = conflict[1]
1022
1666
path = fp.get_path(trans_id)
1023
1667
file_id = self.tt.final_file_id(trans_id)
1024
c = Conflict.factory(conflict_type, path=path, file_id=file_id)
1025
self.cooked_conflicts.append(c)
1668
c = _mod_conflicts.Conflict.factory(conflict_type,
1669
path=path, file_id=file_id)
1671
raise AssertionError('bad conflict type: %r' % (conflict,))
1672
cooked_conflicts.append(c)
1027
for trans_id, conflicts in name_conflicts.iteritems():
1029
this_parent, other_parent = conflicts['parent conflict']
1030
if this_parent == other_parent:
1031
raise AssertionError()
1033
this_parent = other_parent = \
1034
self.tt.final_file_id(self.tt.final_parent(trans_id))
1036
this_name, other_name = conflicts['name conflict']
1037
if this_name == other_name:
1038
raise AssertionError()
1040
this_name = other_name = self.tt.final_name(trans_id)
1041
other_path = fp.get_path(trans_id)
1042
if this_parent is not None and this_name is not None:
1043
this_parent_path = \
1044
fp.get_path(self.tt.trans_id_file_id(this_parent))
1045
this_path = pathjoin(this_parent_path, this_name)
1047
this_path = "<deleted>"
1048
file_id = self.tt.final_file_id(trans_id)
1049
c = Conflict.factory('path conflict', path=this_path,
1050
conflict_path=other_path, file_id=file_id)
1674
self.cooked_conflicts = []
1675
# We want to get rid of path conflicts when a corresponding contents
1676
# conflict exists. This can occur when one branch deletes a file while
1677
# the other renames *and* modifies it. In this case, the content
1678
# conflict is enough.
1679
for c in cooked_conflicts:
1680
if (c.typestring == 'path conflict'
1681
and c.file_id in content_conflict_file_ids):
1051
1683
self.cooked_conflicts.append(c)
1052
self.cooked_conflicts.sort(key=Conflict.sort_key)
1684
self.cooked_conflicts.sort(key=_mod_conflicts.Conflict.sort_key)
1055
1687
class WeaveMerger(Merge3Merger):
1059
1691
supports_reverse_cherrypick = False
1060
1692
history_based = True
1062
def _merged_lines(self, file_id):
1063
"""Generate the merged lines.
1064
There is no distinction between lines that are meant to contain <<<<<<<
1068
base = self.base_tree
1071
plan = self.this_tree.plan_file_merge(file_id, self.other_tree,
1694
def _generate_merge_plan(self, file_id, base):
1695
return self.this_tree.plan_file_merge(file_id, self.other_tree,
1698
def _merged_lines(self, file_id):
1699
"""Generate the merged lines.
1700
There is no distinction between lines that are meant to contain <<<<<<<
1704
base = self.base_tree
1707
plan = self._generate_merge_plan(file_id, base)
1073
1708
if 'merge' in debug.debug_flags:
1074
1709
plan = list(plan)
1075
1710
trans_id = self.tt.trans_id_file_id(file_id)
1076
1711
name = self.tt.final_name(trans_id) + '.plan'
1077
contents = ('%10s|%s' % l for l in plan)
1712
contents = ('%11s|%s' % l for l in plan)
1078
1713
self.tt.new_file(name, self.tt.final_parent(trans_id), contents)
1079
textmerge = PlanWeaveMerge(plan, '<<<<<<< TREE\n',
1080
'>>>>>>> MERGE-SOURCE\n')
1081
return textmerge.merge_lines(self.reprocess)
1714
textmerge = versionedfile.PlanWeaveMerge(plan, '<<<<<<< TREE\n',
1715
'>>>>>>> MERGE-SOURCE\n')
1716
lines, conflicts = textmerge.merge_lines(self.reprocess)
1718
base_lines = textmerge.base_from_plan()
1721
return lines, base_lines
1083
1723
def text_merge(self, file_id, trans_id):
1084
1724
"""Perform a (weave) text merge for a given file and file-id.
1085
1725
If conflicts are encountered, .THIS and .OTHER files will be emitted,
1086
1726
and a conflict will be noted.
1088
lines, conflicts = self._merged_lines(file_id)
1728
lines, base_lines = self._merged_lines(file_id)
1089
1729
lines = list(lines)
1090
# Note we're checking whether the OUTPUT is binary in this case,
1730
# Note we're checking whether the OUTPUT is binary in this case,
1091
1731
# because we don't want to get into weave merge guts.
1092
check_text_lines(lines)
1732
textfile.check_text_lines(lines)
1093
1733
self.tt.create_file(lines, trans_id)
1734
if base_lines is not None:
1095
1736
self._raw_conflicts.append(('text conflict', trans_id))
1096
1737
name = self.tt.final_name(trans_id)
1097
1738
parent_id = self.tt.final_parent(trans_id)
1098
file_group = self._dump_conflicts(name, parent_id, file_id,
1739
file_group = self._dump_conflicts(name, parent_id, file_id,
1741
base_lines=base_lines)
1100
1742
file_group.append(trans_id)
1103
1745
class LCAMerger(WeaveMerger):
1105
def _merged_lines(self, file_id):
1106
"""Generate the merged lines.
1107
There is no distinction between lines that are meant to contain <<<<<<<
1111
base = self.base_tree
1114
plan = self.this_tree.plan_file_lca_merge(file_id, self.other_tree,
1747
def _generate_merge_plan(self, file_id, base):
1748
return self.this_tree.plan_file_lca_merge(file_id, self.other_tree,
1116
if 'merge' in debug.debug_flags:
1118
trans_id = self.tt.trans_id_file_id(file_id)
1119
name = self.tt.final_name(trans_id) + '.plan'
1120
contents = ('%10s|%s' % l for l in plan)
1121
self.tt.new_file(name, self.tt.final_parent(trans_id), contents)
1122
textmerge = PlanWeaveMerge(plan, '<<<<<<< TREE\n',
1123
'>>>>>>> MERGE-SOURCE\n')
1124
return textmerge.merge_lines(self.reprocess)
1127
1751
class Diff3Merger(Merge3Merger):
1128
1752
"""Three-way merger using external diff3 for text merging"""
1130
1754
def dump_file(self, temp_dir, name, tree, file_id):
1131
out_path = pathjoin(temp_dir, name)
1755
out_path = osutils.pathjoin(temp_dir, name)
1132
1756
out_file = open(out_path, "wb")
1134
1758
in_file = tree.get_file(file_id)
1167
1791
osutils.rmtree(temp_dir)
1794
class PathNotInTree(errors.BzrError):
1796
_fmt = """Merge-into failed because %(tree)s does not contain %(path)s."""
1798
def __init__(self, path, tree):
1799
errors.BzrError.__init__(self, path=path, tree=tree)
1802
class MergeIntoMerger(Merger):
1803
"""Merger that understands other_tree will be merged into a subdir.
1805
This also changes the Merger api so that it uses real Branch, revision_id,
1806
and RevisonTree objects, rather than using revision specs.
1809
def __init__(self, this_tree, other_branch, other_tree, target_subdir,
1810
source_subpath, other_rev_id=None):
1811
"""Create a new MergeIntoMerger object.
1813
source_subpath in other_tree will be effectively copied to
1814
target_subdir in this_tree.
1816
:param this_tree: The tree that we will be merging into.
1817
:param other_branch: The Branch we will be merging from.
1818
:param other_tree: The RevisionTree object we want to merge.
1819
:param target_subdir: The relative path where we want to merge
1820
other_tree into this_tree
1821
:param source_subpath: The relative path specifying the subtree of
1822
other_tree to merge into this_tree.
1824
# It is assumed that we are merging a tree that is not in our current
1825
# ancestry, which means we are using the "EmptyTree" as our basis.
1826
null_ancestor_tree = this_tree.branch.repository.revision_tree(
1827
_mod_revision.NULL_REVISION)
1828
super(MergeIntoMerger, self).__init__(
1829
this_branch=this_tree.branch,
1830
this_tree=this_tree,
1831
other_tree=other_tree,
1832
base_tree=null_ancestor_tree,
1834
self._target_subdir = target_subdir
1835
self._source_subpath = source_subpath
1836
self.other_branch = other_branch
1837
if other_rev_id is None:
1838
other_rev_id = other_tree.get_revision_id()
1839
self.other_rev_id = self.other_basis = other_rev_id
1840
self.base_is_ancestor = True
1841
self.backup_files = True
1842
self.merge_type = Merge3Merger
1843
self.show_base = False
1844
self.reprocess = False
1845
self.interesting_ids = None
1846
self.merge_type = _MergeTypeParameterizer(MergeIntoMergeType,
1847
target_subdir=self._target_subdir,
1848
source_subpath=self._source_subpath)
1849
if self._source_subpath != '':
1850
# If this isn't a partial merge make sure the revisions will be
1852
self._maybe_fetch(self.other_branch, self.this_branch,
1855
def set_pending(self):
1856
if self._source_subpath != '':
1858
Merger.set_pending(self)
1861
class _MergeTypeParameterizer(object):
1862
"""Wrap a merge-type class to provide extra parameters.
1864
This is hack used by MergeIntoMerger to pass some extra parameters to its
1865
merge_type. Merger.do_merge() sets up its own set of parameters to pass to
1866
the 'merge_type' member. It is difficult override do_merge without
1867
re-writing the whole thing, so instead we create a wrapper which will pass
1868
the extra parameters.
1871
def __init__(self, merge_type, **kwargs):
1872
self._extra_kwargs = kwargs
1873
self._merge_type = merge_type
1875
def __call__(self, *args, **kwargs):
1876
kwargs.update(self._extra_kwargs)
1877
return self._merge_type(*args, **kwargs)
1879
def __getattr__(self, name):
1880
return getattr(self._merge_type, name)
1883
class MergeIntoMergeType(Merge3Merger):
1884
"""Merger that incorporates a tree (or part of a tree) into another."""
1886
def __init__(self, *args, **kwargs):
1887
"""Initialize the merger object.
1889
:param args: See Merge3Merger.__init__'s args.
1890
:param kwargs: See Merge3Merger.__init__'s keyword args, except for
1891
source_subpath and target_subdir.
1892
:keyword source_subpath: The relative path specifying the subtree of
1893
other_tree to merge into this_tree.
1894
:keyword target_subdir: The relative path where we want to merge
1895
other_tree into this_tree
1897
# All of the interesting work happens during Merge3Merger.__init__(),
1898
# so we have have to hack in to get our extra parameters set.
1899
self._source_subpath = kwargs.pop('source_subpath')
1900
self._target_subdir = kwargs.pop('target_subdir')
1901
super(MergeIntoMergeType, self).__init__(*args, **kwargs)
1903
def _compute_transform(self):
1904
child_pb = ui.ui_factory.nested_progress_bar()
1906
entries = self._entries_to_incorporate()
1907
entries = list(entries)
1908
for num, (entry, parent_id) in enumerate(entries):
1909
child_pb.update('Preparing file merge', num, len(entries))
1910
parent_trans_id = self.tt.trans_id_file_id(parent_id)
1911
trans_id = transform.new_by_entry(self.tt, entry,
1912
parent_trans_id, self.other_tree)
1915
self._finish_computing_transform()
1917
def _entries_to_incorporate(self):
1918
"""Yields pairs of (inventory_entry, new_parent)."""
1919
other_inv = self.other_tree.inventory
1920
subdir_id = other_inv.path2id(self._source_subpath)
1921
if subdir_id is None:
1922
# XXX: The error would be clearer if it gave the URL of the source
1923
# branch, but we don't have a reference to that here.
1924
raise PathNotInTree(self._source_subpath, "Source tree")
1925
subdir = other_inv[subdir_id]
1926
parent_in_target = osutils.dirname(self._target_subdir)
1927
target_id = self.this_tree.inventory.path2id(parent_in_target)
1928
if target_id is None:
1929
raise PathNotInTree(self._target_subdir, "Target tree")
1930
name_in_target = osutils.basename(self._target_subdir)
1931
merge_into_root = subdir.copy()
1932
merge_into_root.name = name_in_target
1933
if self.this_tree.inventory.has_id(merge_into_root.file_id):
1934
# Give the root a new file-id.
1935
# This can happen fairly easily if the directory we are
1936
# incorporating is the root, and both trees have 'TREE_ROOT' as
1937
# their root_id. Users will expect this to Just Work, so we
1938
# change the file-id here.
1939
# Non-root file-ids could potentially conflict too. That's really
1940
# an edge case, so we don't do anything special for those. We let
1941
# them cause conflicts.
1942
merge_into_root.file_id = generate_ids.gen_file_id(name_in_target)
1943
yield (merge_into_root, target_id)
1944
if subdir.kind != 'directory':
1945
# No children, so we are done.
1947
for ignored_path, entry in other_inv.iter_entries_by_dir(subdir_id):
1948
parent_id = entry.parent_id
1949
if parent_id == subdir.file_id:
1950
# The root's parent ID has changed, so make sure children of
1951
# the root refer to the new ID.
1952
parent_id = merge_into_root.file_id
1953
yield (entry, parent_id)
1170
1956
def merge_inner(this_branch, other_tree, base_tree, ignore_zero=False,
1171
1957
backup_files=False,
1172
1958
merge_type=Merge3Merger,
added
removed
bzrlib/merge.py
