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# Copyright (C) 2005, 2009, 2010 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Tree classes, representing directory at point in time.
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from collections import deque
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conflicts as _mod_conflicts,
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revision as _mod_revision,
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from bzrlib.decorators import needs_read_lock
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from bzrlib.errors import BzrError, NoSuchId
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from bzrlib import errors
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from bzrlib.inventory import InventoryFile
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from bzrlib.inter import InterObject
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from bzrlib.osutils import fingerprint_file
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import bzrlib.revision
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from bzrlib.symbol_versioning import deprecated_function, deprecated_in
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from bzrlib.trace import note
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"""Abstract file tree.
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There are several subclasses:
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* `WorkingTree` exists as files on disk editable by the user.
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* `RevisionTree` is a tree as recorded at some point in the past.
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Trees contain an `Inventory` object, and also know how to retrieve
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file texts mentioned in the inventory, either from a working
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directory or from a store.
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It is possible for trees to contain files that are not described
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in their inventory or vice versa; for this use `filenames()`.
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Trees can be compared, etc, regardless of whether they are working
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trees or versioned trees.
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def changes_from(self, other, want_unchanged=False, specific_files=None,
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extra_trees=None, require_versioned=False, include_root=False,
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want_unversioned=False):
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"""Return a TreeDelta of the changes from other to this tree.
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:param other: A tree to compare with.
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:param specific_files: An optional list of file paths to restrict the
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comparison to. When mapping filenames to ids, all matches in all
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trees (including optional extra_trees) are used, and all children of
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matched directories are included.
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:param want_unchanged: An optional boolean requesting the inclusion of
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unchanged entries in the result.
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:param extra_trees: An optional list of additional trees to use when
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mapping the contents of specific_files (paths) to file_ids.
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:param require_versioned: An optional boolean (defaults to False). When
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supplied and True all the 'specific_files' must be versioned, or
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a PathsNotVersionedError will be thrown.
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:param want_unversioned: Scan for unversioned paths.
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The comparison will be performed by an InterTree object looked up on
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# Martin observes that Tree.changes_from returns a TreeDelta and this
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# may confuse people, because the class name of the returned object is
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# a synonym of the object referenced in the method name.
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return InterTree.get(other, self).compare(
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want_unchanged=want_unchanged,
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specific_files=specific_files,
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extra_trees=extra_trees,
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require_versioned=require_versioned,
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include_root=include_root,
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want_unversioned=want_unversioned,
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def iter_changes(self, from_tree, include_unchanged=False,
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specific_files=None, pb=None, extra_trees=None,
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require_versioned=True, want_unversioned=False):
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intertree = InterTree.get(from_tree, self)
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return intertree.iter_changes(include_unchanged, specific_files, pb,
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extra_trees, require_versioned, want_unversioned=want_unversioned)
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"""Get a list of the conflicts in the tree.
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Each conflict is an instance of bzrlib.conflicts.Conflict.
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return _mod_conflicts.ConflictList()
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"""For trees that can have unversioned files, return all such paths."""
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def get_parent_ids(self):
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"""Get the parent ids for this tree.
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:return: a list of parent ids. [] is returned to indicate
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a tree with no parents.
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:raises: BzrError if the parents are not known.
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raise NotImplementedError(self.get_parent_ids)
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def has_filename(self, filename):
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"""True if the tree has given filename."""
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raise NotImplementedError(self.has_filename)
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def has_id(self, file_id):
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return self.inventory.has_id(file_id)
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def __contains__(self, file_id):
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return self.has_id(file_id)
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def has_or_had_id(self, file_id):
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return self.inventory.has_id(file_id)
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def is_ignored(self, filename):
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"""Check whether the filename is ignored by this tree.
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:param filename: The relative filename within the tree.
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:return: True if the filename is ignored.
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return iter(self.inventory)
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def all_file_ids(self):
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"""Iterate through all file ids, including ids for missing files."""
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return set(self.inventory)
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def id2path(self, file_id):
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"""Return the path for a file id.
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return self.inventory.id2path(file_id)
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def is_control_filename(self, filename):
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"""True if filename is the name of a control file in this tree.
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:param filename: A filename within the tree. This is a relative path
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from the root of this tree.
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This is true IF and ONLY IF the filename is part of the meta data
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that bzr controls in this tree. I.E. a random .bzr directory placed
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on disk will not be a control file for this tree.
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return self.bzrdir.is_control_filename(filename)
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def iter_entries_by_dir(self, specific_file_ids=None, yield_parents=False):
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"""Walk the tree in 'by_dir' order.
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This will yield each entry in the tree as a (path, entry) tuple.
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The order that they are yielded is:
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Directories are walked in a depth-first lexicographical order,
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however, whenever a directory is reached, all of its direct child
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nodes are yielded in lexicographical order before yielding the
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For example, in the tree::
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The yield order (ignoring root) would be::
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a, f, a/b, a/d, a/b/c, a/d/e, f/g
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:param yield_parents: If True, yield the parents from the root leading
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down to specific_file_ids that have been requested. This has no
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impact if specific_file_ids is None.
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return self.inventory.iter_entries_by_dir(
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specific_file_ids=specific_file_ids, yield_parents=yield_parents)
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def iter_references(self):
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if self.supports_tree_reference():
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for path, entry in self.iter_entries_by_dir():
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if entry.kind == 'tree-reference':
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yield path, entry.file_id
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def kind(self, file_id):
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raise NotImplementedError("Tree subclass %s must implement kind"
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% self.__class__.__name__)
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def stored_kind(self, file_id):
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"""File kind stored for this file_id.
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May not match kind on disk for working trees. Always available
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for versioned files, even when the file itself is missing.
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return self.kind(file_id)
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def path_content_summary(self, path):
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"""Get a summary of the information about path.
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All the attributes returned are for the canonical form, not the
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convenient form (if content filters are in use.)
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:param path: A relative path within the tree.
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:return: A tuple containing kind, size, exec, sha1-or-link.
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Kind is always present (see tree.kind()).
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size is present if kind is file and the size of the
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canonical form can be cheaply determined, None otherwise.
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exec is None unless kind is file and the platform supports the 'x'
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sha1-or-link is the link target if kind is symlink, or the sha1 if
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it can be obtained without reading the file.
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raise NotImplementedError(self.path_content_summary)
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def get_reference_revision(self, file_id, path=None):
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raise NotImplementedError("Tree subclass %s must implement "
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"get_reference_revision"
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% self.__class__.__name__)
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def _comparison_data(self, entry, path):
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"""Return a tuple of kind, executable, stat_value for a file.
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entry may be None if there is no inventory entry for the file, but
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path must always be supplied.
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kind is None if there is no file present (even if an inventory id is
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present). executable is False for non-file entries.
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raise NotImplementedError(self._comparison_data)
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def _file_size(self, entry, stat_value):
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raise NotImplementedError(self._file_size)
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def _get_inventory(self):
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return self._inventory
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def get_file(self, file_id, path=None):
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"""Return a file object for the file file_id in the tree.
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If both file_id and path are defined, it is implementation defined as
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to which one is used.
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raise NotImplementedError(self.get_file)
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def get_file_with_stat(self, file_id, path=None):
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"""Get a file handle and stat object for file_id.
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The default implementation returns (self.get_file, None) for backwards
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:param file_id: The file id to read.
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:param path: The path of the file, if it is known.
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:return: A tuple (file_handle, stat_value_or_None). If the tree has
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no stat facility, or need for a stat cache feedback during commit,
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it may return None for the second element of the tuple.
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return (self.get_file(file_id, path), None)
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def get_file_text(self, file_id, path=None):
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"""Return the byte content of a file.
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:param file_id: The file_id of the file.
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:param path: The path of the file.
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If both file_id and path are supplied, an implementation may use
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my_file = self.get_file(file_id, path)
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return my_file.read()
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def get_file_lines(self, file_id, path=None):
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"""Return the content of a file, as lines.
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:param file_id: The file_id of the file.
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:param path: The path of the file.
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If both file_id and path are supplied, an implementation may use
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return osutils.split_lines(self.get_file_text(file_id, path))
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def get_file_mtime(self, file_id, path=None):
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"""Return the modification time for a file.
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:param file_id: The handle for this file.
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:param path: The path that this file can be found at.
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These must point to the same object.
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raise NotImplementedError(self.get_file_mtime)
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def get_file_size(self, file_id):
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"""Return the size of a file in bytes.
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This applies only to regular files. If invoked on directories or
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symlinks, it will return None.
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:param file_id: The file-id of the file
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raise NotImplementedError(self.get_file_size)
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def get_file_by_path(self, path):
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return self.get_file(self._inventory.path2id(path), path)
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def iter_files_bytes(self, desired_files):
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"""Iterate through file contents.
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Files will not necessarily be returned in the order they occur in
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desired_files. No specific order is guaranteed.
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Yields pairs of identifier, bytes_iterator. identifier is an opaque
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value supplied by the caller as part of desired_files. It should
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uniquely identify the file version in the caller's context. (Examples:
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an index number or a TreeTransform trans_id.)
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bytes_iterator is an iterable of bytestrings for the file. The
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kind of iterable and length of the bytestrings are unspecified, but for
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this implementation, it is a tuple containing a single bytestring with
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the complete text of the file.
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:param desired_files: a list of (file_id, identifier) pairs
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for file_id, identifier in desired_files:
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# We wrap the string in a tuple so that we can return an iterable
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# of bytestrings. (Technically, a bytestring is also an iterable
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# of bytestrings, but iterating through each character is not
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cur_file = (self.get_file_text(file_id),)
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yield identifier, cur_file
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def get_symlink_target(self, file_id):
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"""Get the target for a given file_id.
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It is assumed that the caller already knows that file_id is referencing
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:param file_id: Handle for the symlink entry.
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:return: The path the symlink points to.
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raise NotImplementedError(self.get_symlink_target)
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def get_canonical_inventory_paths(self, paths):
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"""Like get_canonical_inventory_path() but works on multiple items.
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:param paths: A sequence of paths relative to the root of the tree.
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:return: A list of paths, with each item the corresponding input path
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adjusted to account for existing elements that match case
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return list(self._yield_canonical_inventory_paths(paths))
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def get_canonical_inventory_path(self, path):
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"""Returns the first inventory item that case-insensitively matches path.
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If a path matches exactly, it is returned. If no path matches exactly
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but more than one path matches case-insensitively, it is implementation
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defined which is returned.
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If no path matches case-insensitively, the input path is returned, but
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with as many path entries that do exist changed to their canonical
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If you need to resolve many names from the same tree, you should
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use get_canonical_inventory_paths() to avoid O(N) behaviour.
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:param path: A paths relative to the root of the tree.
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:return: The input path adjusted to account for existing elements
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that match case insensitively.
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return self._yield_canonical_inventory_paths([path]).next()
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def _yield_canonical_inventory_paths(self, paths):
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# First, if the path as specified exists exactly, just use it.
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if self.path2id(path) is not None:
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cur_id = self.get_root_id()
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bit_iter = iter(path.split("/"))
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for child in self.iter_children(cur_id):
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# XXX: it seem like if the child is known to be in the
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# tree, we shouldn't need to go from its id back to
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# its path -- mbp 2010-02-11
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# XXX: it seems like we could be more efficient
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# by just directly looking up the original name and
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# only then searching all children; also by not
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# chopping paths so much. -- mbp 2010-02-11
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child_base = os.path.basename(self.id2path(child))
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if (child_base == elt):
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# if we found an exact match, we can stop now; if
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# we found an approximate match we need to keep
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# searching because there might be an exact match
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new_path = osutils.pathjoin(cur_path, child_base)
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elif child_base.lower() == lelt:
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new_path = osutils.pathjoin(cur_path, child_base)
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# before a change is committed we can see this error...
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# got to the end of this directory and no entries matched.
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# Return what matched so far, plus the rest as specified.
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cur_path = osutils.pathjoin(cur_path, elt, *list(bit_iter))
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def get_root_id(self):
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"""Return the file_id for the root of this tree."""
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raise NotImplementedError(self.get_root_id)
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def annotate_iter(self, file_id,
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default_revision=_mod_revision.CURRENT_REVISION):
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"""Return an iterator of revision_id, line tuples.
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For working trees (and mutable trees in general), the special
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revision_id 'current:' will be used for lines that are new in this
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tree, e.g. uncommitted changes.
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:param file_id: The file to produce an annotated version from
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:param default_revision: For lines that don't match a basis, mark them
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with this revision id. Not all implementations will make use of
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raise NotImplementedError(self.annotate_iter)
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def _get_plan_merge_data(self, file_id, other, base):
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from bzrlib import versionedfile
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vf = versionedfile._PlanMergeVersionedFile(file_id)
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last_revision_a = self._get_file_revision(file_id, vf, 'this:')
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last_revision_b = other._get_file_revision(file_id, vf, 'other:')
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last_revision_base = None
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last_revision_base = base._get_file_revision(file_id, vf, 'base:')
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return vf, last_revision_a, last_revision_b, last_revision_base
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def plan_file_merge(self, file_id, other, base=None):
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"""Generate a merge plan based on annotations.
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If the file contains uncommitted changes in this tree, they will be
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attributed to the 'current:' pseudo-revision. If the file contains
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uncommitted changes in the other tree, they will be assigned to the
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'other:' pseudo-revision.
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data = self._get_plan_merge_data(file_id, other, base)
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vf, last_revision_a, last_revision_b, last_revision_base = data
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return vf.plan_merge(last_revision_a, last_revision_b,
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def plan_file_lca_merge(self, file_id, other, base=None):
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"""Generate a merge plan based lca-newness.
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If the file contains uncommitted changes in this tree, they will be
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attributed to the 'current:' pseudo-revision. If the file contains
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uncommitted changes in the other tree, they will be assigned to the
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'other:' pseudo-revision.
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data = self._get_plan_merge_data(file_id, other, base)
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vf, last_revision_a, last_revision_b, last_revision_base = data
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return vf.plan_lca_merge(last_revision_a, last_revision_b,
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def _iter_parent_trees(self):
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"""Iterate through parent trees, defaulting to Tree.revision_tree."""
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for revision_id in self.get_parent_ids():
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yield self.revision_tree(revision_id)
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except errors.NoSuchRevisionInTree:
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yield self.repository.revision_tree(revision_id)
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def _file_revision(revision_tree, file_id):
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"""Determine the revision associated with a file in a given tree."""
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revision_tree.lock_read()
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return revision_tree.inventory[file_id].revision
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revision_tree.unlock()
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def _get_file_revision(self, file_id, vf, tree_revision):
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"""Ensure that file_id, tree_revision is in vf to plan the merge."""
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if getattr(self, '_repository', None) is None:
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last_revision = tree_revision
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parent_keys = [(file_id, self._file_revision(t, file_id)) for t in
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self._iter_parent_trees()]
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vf.add_lines((file_id, last_revision), parent_keys,
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self.get_file(file_id).readlines())
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repo = self.branch.repository
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last_revision = self._file_revision(self, file_id)
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base_vf = self._repository.texts
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if base_vf not in vf.fallback_versionedfiles:
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vf.fallback_versionedfiles.append(base_vf)
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inventory = property(_get_inventory,
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doc="Inventory of this Tree")
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def _check_retrieved(self, ie, f):
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fp = fingerprint_file(f)
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if ie.text_size is not None:
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if ie.text_size != fp['size']:
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raise BzrError("mismatched size for file %r in %r" % (ie.file_id, self._store),
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["inventory expects %d bytes" % ie.text_size,
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"file is actually %d bytes" % fp['size'],
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"store is probably damaged/corrupt"])
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if ie.text_sha1 != fp['sha1']:
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raise BzrError("wrong SHA-1 for file %r in %r" % (ie.file_id, self._store),
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["inventory expects %s" % ie.text_sha1,
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"file is actually %s" % fp['sha1'],
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"store is probably damaged/corrupt"])
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def path2id(self, path):
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"""Return the id for path in this tree."""
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return self._inventory.path2id(path)
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def paths2ids(self, paths, trees=[], require_versioned=True):
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"""Return all the ids that can be reached by walking from paths.
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Each path is looked up in this tree and any extras provided in
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trees, and this is repeated recursively: the children in an extra tree
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of a directory that has been renamed under a provided path in this tree
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are all returned, even if none exist under a provided path in this
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tree, and vice versa.
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:param paths: An iterable of paths to start converting to ids from.
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Alternatively, if paths is None, no ids should be calculated and None
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will be returned. This is offered to make calling the api unconditional
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for code that *might* take a list of files.
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:param trees: Additional trees to consider.
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:param require_versioned: If False, do not raise NotVersionedError if
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an element of paths is not versioned in this tree and all of trees.
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return find_ids_across_trees(paths, [self] + list(trees), require_versioned)
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def iter_children(self, file_id):
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entry = self.iter_entries_by_dir([file_id]).next()[1]
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for child in getattr(entry, 'children', {}).itervalues():
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def revision_tree(self, revision_id):
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"""Obtain a revision tree for the revision revision_id.
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The intention of this method is to allow access to possibly cached
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tree data. Implementors of this method should raise NoSuchRevision if
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the tree is not locally available, even if they could obtain the
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tree via a repository or some other means. Callers are responsible
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for finding the ultimate source for a revision tree.
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:param revision_id: The revision_id of the requested tree.
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:raises: NoSuchRevision if the tree cannot be obtained.
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raise errors.NoSuchRevisionInTree(self, revision_id)
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"""What files are present in this tree and unknown.
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:return: an iterator over the unknown files.
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def filter_unversioned_files(self, paths):
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"""Filter out paths that are versioned.
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:return: set of paths.
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# NB: we specifically *don't* call self.has_filename, because for
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# WorkingTrees that can indicate files that exist on disk but that
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pred = self.inventory.has_filename
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return set((p for p in paths if not pred(p)))
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def walkdirs(self, prefix=""):
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"""Walk the contents of this tree from path down.
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This yields all the data about the contents of a directory at a time.
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After each directory has been yielded, if the caller has mutated the
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list to exclude some directories, they are then not descended into.
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The data yielded is of the form:
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((directory-relpath, directory-path-from-root, directory-fileid),
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[(relpath, basename, kind, lstat, path_from_tree_root, file_id,
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versioned_kind), ...]),
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- directory-relpath is the containing dirs relpath from prefix
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- directory-path-from-root is the containing dirs path from /
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- directory-fileid is the id of the directory if it is versioned.
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- relpath is the relative path within the subtree being walked.
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- basename is the basename
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- kind is the kind of the file now. If unknonwn then the file is not
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present within the tree - but it may be recorded as versioned. See
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- lstat is the stat data *if* the file was statted.
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- path_from_tree_root is the path from the root of the tree.
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- file_id is the file_id if the entry is versioned.
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- versioned_kind is the kind of the file as last recorded in the
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versioning system. If 'unknown' the file is not versioned.
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One of 'kind' and 'versioned_kind' must not be 'unknown'.
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:param prefix: Start walking from prefix within the tree rather than
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at the root. This allows one to walk a subtree but get paths that are
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relative to a tree rooted higher up.
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:return: an iterator over the directory data.
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raise NotImplementedError(self.walkdirs)
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def supports_content_filtering(self):
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def _content_filter_stack(self, path=None, file_id=None):
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"""The stack of content filters for a path if filtering is supported.
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Readers will be applied in first-to-last order.
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Writers will be applied in last-to-first order.
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Either the path or the file-id needs to be provided.
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:param path: path relative to the root of the tree
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:param file_id: file_id or None if unknown
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:return: the list of filters - [] if there are none
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filter_pref_names = filters._get_registered_names()
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if len(filter_pref_names) == 0:
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path = self.id2path(file_id)
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prefs = self.iter_search_rules([path], filter_pref_names).next()
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stk = filters._get_filter_stack_for(prefs)
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if 'filters' in debug.debug_flags:
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note("*** %s content-filter: %s => %r" % (path,prefs,stk))
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def _content_filter_stack_provider(self):
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"""A function that returns a stack of ContentFilters.
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The function takes a path (relative to the top of the tree) and a
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file-id as parameters.
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:return: None if content filtering is not supported by this tree.
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if self.supports_content_filtering():
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return lambda path, file_id: \
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self._content_filter_stack(path, file_id)
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def iter_search_rules(self, path_names, pref_names=None,
697
_default_searcher=None):
698
"""Find the preferences for filenames in a tree.
700
:param path_names: an iterable of paths to find attributes for.
701
Paths are given relative to the root of the tree.
702
:param pref_names: the list of preferences to lookup - None for all
703
:param _default_searcher: private parameter to assist testing - don't use
704
:return: an iterator of tuple sequences, one per path-name.
705
See _RulesSearcher.get_items for details on the tuple sequence.
707
if _default_searcher is None:
708
_default_searcher = rules._per_user_searcher
709
searcher = self._get_rules_searcher(_default_searcher)
710
if searcher is not None:
711
if pref_names is not None:
712
for path in path_names:
713
yield searcher.get_selected_items(path, pref_names)
715
for path in path_names:
716
yield searcher.get_items(path)
719
def _get_rules_searcher(self, default_searcher):
720
"""Get the RulesSearcher for this tree given the default one."""
721
searcher = default_searcher
725
######################################################################
728
# TODO: Merge these two functions into a single one that can operate
729
# on either a whole tree or a set of files.
731
# TODO: Return the diff in order by filename, not by category or in
732
# random order. Can probably be done by lock-stepping through the
733
# filenames from both trees.
736
def file_status(filename, old_tree, new_tree):
737
"""Return single-letter status, old and new names for a file.
739
The complexity here is in deciding how to represent renames;
740
many complex cases are possible.
742
old_inv = old_tree.inventory
743
new_inv = new_tree.inventory
744
new_id = new_inv.path2id(filename)
745
old_id = old_inv.path2id(filename)
747
if not new_id and not old_id:
748
# easy: doesn't exist in either; not versioned at all
749
if new_tree.is_ignored(filename):
750
return 'I', None, None
752
return '?', None, None
754
# There is now a file of this name, great.
757
# There is no longer a file of this name, but we can describe
758
# what happened to the file that used to have
759
# this name. There are two possibilities: either it was
760
# deleted entirely, or renamed.
761
if new_inv.has_id(old_id):
762
return 'X', old_inv.id2path(old_id), new_inv.id2path(old_id)
764
return 'D', old_inv.id2path(old_id), None
766
# if the file_id is new in this revision, it is added
767
if new_id and not old_inv.has_id(new_id):
770
# if there used to be a file of this name, but that ID has now
771
# disappeared, it is deleted
772
if old_id and not new_inv.has_id(old_id):
778
@deprecated_function(deprecated_in((1, 9, 0)))
779
def find_renames(old_inv, new_inv):
780
for file_id in old_inv:
781
if file_id not in new_inv:
783
old_name = old_inv.id2path(file_id)
784
new_name = new_inv.id2path(file_id)
785
if old_name != new_name:
786
yield (old_name, new_name)
789
def find_ids_across_trees(filenames, trees, require_versioned=True):
790
"""Find the ids corresponding to specified filenames.
792
All matches in all trees will be used, and all children of matched
793
directories will be used.
795
:param filenames: The filenames to find file_ids for (if None, returns
797
:param trees: The trees to find file_ids within
798
:param require_versioned: if true, all specified filenames must occur in
800
:return: a set of file ids for the specified filenames and their children.
804
specified_path_ids = _find_ids_across_trees(filenames, trees,
806
return _find_children_across_trees(specified_path_ids, trees)
809
def _find_ids_across_trees(filenames, trees, require_versioned):
810
"""Find the ids corresponding to specified filenames.
812
All matches in all trees will be used, but subdirectories are not scanned.
814
:param filenames: The filenames to find file_ids for
815
:param trees: The trees to find file_ids within
816
:param require_versioned: if true, all specified filenames must occur in
818
:return: a set of file ids for the specified filenames
821
interesting_ids = set()
822
for tree_path in filenames:
825
file_id = tree.path2id(tree_path)
826
if file_id is not None:
827
interesting_ids.add(file_id)
830
not_versioned.append(tree_path)
831
if len(not_versioned) > 0 and require_versioned:
832
raise errors.PathsNotVersionedError(not_versioned)
833
return interesting_ids
836
def _find_children_across_trees(specified_ids, trees):
837
"""Return a set including specified ids and their children.
839
All matches in all trees will be used.
841
:param trees: The trees to find file_ids within
842
:return: a set containing all specified ids and their children
844
interesting_ids = set(specified_ids)
845
pending = interesting_ids
846
# now handle children of interesting ids
847
# we loop so that we handle all children of each id in both trees
848
while len(pending) > 0:
850
for file_id in pending:
852
if not tree.has_or_had_id(file_id):
854
for child_id in tree.iter_children(file_id):
855
if child_id not in interesting_ids:
856
new_pending.add(child_id)
857
interesting_ids.update(new_pending)
858
pending = new_pending
859
return interesting_ids
862
class InterTree(InterObject):
863
"""This class represents operations taking place between two Trees.
865
Its instances have methods like 'compare' and contain references to the
866
source and target trees these operations are to be carried out on.
868
Clients of bzrlib should not need to use InterTree directly, rather they
869
should use the convenience methods on Tree such as 'Tree.compare()' which
870
will pass through to InterTree as appropriate.
875
def _changes_from_entries(self, source_entry, target_entry,
876
source_path=None, target_path=None):
877
"""Generate a iter_changes tuple between source_entry and target_entry.
879
:param source_entry: An inventory entry from self.source, or None.
880
:param target_entry: An inventory entry from self.target, or None.
881
:param source_path: The path of source_entry, if known. If not known
882
it will be looked up.
883
:param target_path: The path of target_entry, if known. If not known
884
it will be looked up.
885
:return: A tuple, item 0 of which is an iter_changes result tuple, and
886
item 1 is True if there are any changes in the result tuple.
888
if source_entry is None:
889
if target_entry is None:
891
file_id = target_entry.file_id
893
file_id = source_entry.file_id
894
if source_entry is not None:
895
source_versioned = True
896
source_name = source_entry.name
897
source_parent = source_entry.parent_id
898
if source_path is None:
899
source_path = self.source.id2path(file_id)
900
source_kind, source_executable, source_stat = \
901
self.source._comparison_data(source_entry, source_path)
903
source_versioned = False
907
source_executable = None
908
if target_entry is not None:
909
target_versioned = True
910
target_name = target_entry.name
911
target_parent = target_entry.parent_id
912
if target_path is None:
913
target_path = self.target.id2path(file_id)
914
target_kind, target_executable, target_stat = \
915
self.target._comparison_data(target_entry, target_path)
917
target_versioned = False
921
target_executable = None
922
versioned = (source_versioned, target_versioned)
923
kind = (source_kind, target_kind)
924
changed_content = False
925
if source_kind != target_kind:
926
changed_content = True
927
elif source_kind == 'file':
928
if (self.source.get_file_sha1(file_id, source_path, source_stat) !=
929
self.target.get_file_sha1(file_id, target_path, target_stat)):
930
changed_content = True
931
elif source_kind == 'symlink':
932
if (self.source.get_symlink_target(file_id) !=
933
self.target.get_symlink_target(file_id)):
934
changed_content = True
935
# XXX: Yes, the indentation below is wrong. But fixing it broke
936
# test_merge.TestMergerEntriesLCAOnDisk.
937
# test_nested_tree_subtree_renamed_and_modified. We'll wait for
938
# the fix from bzr.dev -- vila 2009026
939
elif source_kind == 'tree-reference':
940
if (self.source.get_reference_revision(file_id, source_path)
941
!= self.target.get_reference_revision(file_id, target_path)):
942
changed_content = True
943
parent = (source_parent, target_parent)
944
name = (source_name, target_name)
945
executable = (source_executable, target_executable)
946
if (changed_content is not False or versioned[0] != versioned[1]
947
or parent[0] != parent[1] or name[0] != name[1] or
948
executable[0] != executable[1]):
952
return (file_id, (source_path, target_path), changed_content,
953
versioned, parent, name, kind, executable), changes
956
def compare(self, want_unchanged=False, specific_files=None,
957
extra_trees=None, require_versioned=False, include_root=False,
958
want_unversioned=False):
959
"""Return the changes from source to target.
961
:return: A TreeDelta.
962
:param specific_files: An optional list of file paths to restrict the
963
comparison to. When mapping filenames to ids, all matches in all
964
trees (including optional extra_trees) are used, and all children of
965
matched directories are included.
966
:param want_unchanged: An optional boolean requesting the inclusion of
967
unchanged entries in the result.
968
:param extra_trees: An optional list of additional trees to use when
969
mapping the contents of specific_files (paths) to file_ids.
970
:param require_versioned: An optional boolean (defaults to False). When
971
supplied and True all the 'specific_files' must be versioned, or
972
a PathsNotVersionedError will be thrown.
973
:param want_unversioned: Scan for unversioned paths.
975
# NB: show_status depends on being able to pass in non-versioned files
976
# and report them as unknown
977
trees = (self.source,)
978
if extra_trees is not None:
979
trees = trees + tuple(extra_trees)
980
# target is usually the newer tree:
981
specific_file_ids = self.target.paths2ids(specific_files, trees,
982
require_versioned=require_versioned)
983
if specific_files and not specific_file_ids:
984
# All files are unversioned, so just return an empty delta
985
# _compare_trees would think we want a complete delta
986
result = delta.TreeDelta()
987
fake_entry = InventoryFile('unused', 'unused', 'unused')
988
result.unversioned = [(path, None,
989
self.target._comparison_data(fake_entry, path)[0]) for path in
992
return delta._compare_trees(self.source, self.target, want_unchanged,
993
specific_files, include_root, extra_trees=extra_trees,
994
require_versioned=require_versioned,
995
want_unversioned=want_unversioned)
997
def iter_changes(self, include_unchanged=False,
998
specific_files=None, pb=None, extra_trees=[],
999
require_versioned=True, want_unversioned=False):
1000
"""Generate an iterator of changes between trees.
1002
A tuple is returned:
1003
(file_id, (path_in_source, path_in_target),
1004
changed_content, versioned, parent, name, kind,
1007
Changed_content is True if the file's content has changed. This
1008
includes changes to its kind, and to a symlink's target.
1010
versioned, parent, name, kind, executable are tuples of (from, to).
1011
If a file is missing in a tree, its kind is None.
1013
Iteration is done in parent-to-child order, relative to the target
1016
There is no guarantee that all paths are in sorted order: the
1017
requirement to expand the search due to renames may result in children
1018
that should be found early being found late in the search, after
1019
lexically later results have been returned.
1020
:param require_versioned: Raise errors.PathsNotVersionedError if a
1021
path in the specific_files list is not versioned in one of
1022
source, target or extra_trees.
1023
:param specific_files: An optional list of file paths to restrict the
1024
comparison to. When mapping filenames to ids, all matches in all
1025
trees (including optional extra_trees) are used, and all children
1026
of matched directories are included. The parents in the target tree
1027
of the specific files up to and including the root of the tree are
1028
always evaluated for changes too.
1029
:param want_unversioned: Should unversioned files be returned in the
1030
output. An unversioned file is defined as one with (False, False)
1031
for the versioned pair.
1033
lookup_trees = [self.source]
1035
lookup_trees.extend(extra_trees)
1036
# The ids of items we need to examine to insure delta consistency.
1037
precise_file_ids = set()
1038
changed_file_ids = []
1039
if specific_files == []:
1040
specific_file_ids = []
1042
specific_file_ids = self.target.paths2ids(specific_files,
1043
lookup_trees, require_versioned=require_versioned)
1044
if specific_files is not None:
1045
# reparented or added entries must have their parents included
1046
# so that valid deltas can be created. The seen_parents set
1047
# tracks the parents that we need to have.
1048
# The seen_dirs set tracks directory entries we've yielded.
1049
# After outputting version object in to_entries we set difference
1050
# the two seen sets and start checking parents.
1051
seen_parents = set()
1053
if want_unversioned:
1054
all_unversioned = sorted([(p.split('/'), p) for p in
1055
self.target.extras()
1056
if specific_files is None or
1057
osutils.is_inside_any(specific_files, p)])
1058
all_unversioned = deque(all_unversioned)
1060
all_unversioned = deque()
1062
from_entries_by_dir = list(self.source.iter_entries_by_dir(
1063
specific_file_ids=specific_file_ids))
1064
from_data = dict((e.file_id, (p, e)) for p, e in from_entries_by_dir)
1065
to_entries_by_dir = list(self.target.iter_entries_by_dir(
1066
specific_file_ids=specific_file_ids))
1067
num_entries = len(from_entries_by_dir) + len(to_entries_by_dir)
1069
# the unversioned path lookup only occurs on real trees - where there
1070
# can be extras. So the fake_entry is solely used to look up
1071
# executable it values when execute is not supported.
1072
fake_entry = InventoryFile('unused', 'unused', 'unused')
1073
for target_path, target_entry in to_entries_by_dir:
1074
while (all_unversioned and
1075
all_unversioned[0][0] < target_path.split('/')):
1076
unversioned_path = all_unversioned.popleft()
1077
target_kind, target_executable, target_stat = \
1078
self.target._comparison_data(fake_entry, unversioned_path[1])
1079
yield (None, (None, unversioned_path[1]), True, (False, False),
1081
(None, unversioned_path[0][-1]),
1082
(None, target_kind),
1083
(None, target_executable))
1084
source_path, source_entry = from_data.get(target_entry.file_id,
1086
result, changes = self._changes_from_entries(source_entry,
1087
target_entry, source_path=source_path, target_path=target_path)
1088
to_paths[result[0]] = result[1][1]
1093
pb.update('comparing files', entry_count, num_entries)
1094
if changes or include_unchanged:
1095
if specific_file_ids is not None:
1096
new_parent_id = result[4][1]
1097
precise_file_ids.add(new_parent_id)
1098
changed_file_ids.append(result[0])
1100
# Ensure correct behaviour for reparented/added specific files.
1101
if specific_files is not None:
1102
# Record output dirs
1103
if result[6][1] == 'directory':
1104
seen_dirs.add(result[0])
1105
# Record parents of reparented/added entries.
1106
versioned = result[3]
1108
if not versioned[0] or parents[0] != parents[1]:
1109
seen_parents.add(parents[1])
1110
while all_unversioned:
1111
# yield any trailing unversioned paths
1112
unversioned_path = all_unversioned.popleft()
1113
to_kind, to_executable, to_stat = \
1114
self.target._comparison_data(fake_entry, unversioned_path[1])
1115
yield (None, (None, unversioned_path[1]), True, (False, False),
1117
(None, unversioned_path[0][-1]),
1119
(None, to_executable))
1120
# Yield all remaining source paths
1121
for path, from_entry in from_entries_by_dir:
1122
file_id = from_entry.file_id
1123
if file_id in to_paths:
1126
if file_id not in self.target.all_file_ids():
1127
# common case - paths we have not emitted are not present in
1131
to_path = self.target.id2path(file_id)
1134
pb.update('comparing files', entry_count, num_entries)
1135
versioned = (True, False)
1136
parent = (from_entry.parent_id, None)
1137
name = (from_entry.name, None)
1138
from_kind, from_executable, stat_value = \
1139
self.source._comparison_data(from_entry, path)
1140
kind = (from_kind, None)
1141
executable = (from_executable, None)
1142
changed_content = from_kind is not None
1143
# the parent's path is necessarily known at this point.
1144
changed_file_ids.append(file_id)
1145
yield(file_id, (path, to_path), changed_content, versioned, parent,
1146
name, kind, executable)
1147
changed_file_ids = set(changed_file_ids)
1148
if specific_file_ids is not None:
1149
for result in self._handle_precise_ids(precise_file_ids,
1153
def _get_entry(self, tree, file_id):
1154
"""Get an inventory entry from a tree, with missing entries as None.
1156
If the tree raises NotImplementedError on accessing .inventory, then
1157
this is worked around using iter_entries_by_dir on just the file id
1160
:param tree: The tree to lookup the entry in.
1161
:param file_id: The file_id to lookup.
1164
inventory = tree.inventory
1165
except NotImplementedError:
1166
# No inventory available.
1168
iterator = tree.iter_entries_by_dir(specific_file_ids=[file_id])
1169
return iterator.next()[1]
1170
except StopIteration:
1174
return inventory[file_id]
1175
except errors.NoSuchId:
1178
def _handle_precise_ids(self, precise_file_ids, changed_file_ids,
1179
discarded_changes=None):
1180
"""Fill out a partial iter_changes to be consistent.
1182
:param precise_file_ids: The file ids of parents that were seen during
1184
:param changed_file_ids: The file ids of already emitted items.
1185
:param discarded_changes: An optional dict of precalculated
1186
iter_changes items which the partial iter_changes had not output
1188
:return: A generator of iter_changes items to output.
1190
# process parents of things that had changed under the users
1191
# requested paths to prevent incorrect paths or parent ids which
1192
# aren't in the tree.
1193
while precise_file_ids:
1194
precise_file_ids.discard(None)
1195
# Don't emit file_ids twice
1196
precise_file_ids.difference_update(changed_file_ids)
1197
if not precise_file_ids:
1199
# If the there was something at a given output path in source, we
1200
# have to include the entry from source in the delta, or we would
1201
# be putting this entry into a used path.
1203
for parent_id in precise_file_ids:
1205
paths.append(self.target.id2path(parent_id))
1206
except errors.NoSuchId:
1207
# This id has been dragged in from the source by delta
1208
# expansion and isn't present in target at all: we don't
1209
# need to check for path collisions on it.
1212
old_id = self.source.path2id(path)
1213
precise_file_ids.add(old_id)
1214
precise_file_ids.discard(None)
1215
current_ids = precise_file_ids
1216
precise_file_ids = set()
1217
# We have to emit all of precise_file_ids that have been altered.
1218
# We may have to output the children of some of those ids if any
1219
# directories have stopped being directories.
1220
for file_id in current_ids:
1222
if discarded_changes:
1223
result = discarded_changes.get(file_id)
1228
old_entry = self._get_entry(self.source, file_id)
1229
new_entry = self._get_entry(self.target, file_id)
1230
result, changes = self._changes_from_entries(
1231
old_entry, new_entry)
1234
# Get this parents parent to examine.
1235
new_parent_id = result[4][1]
1236
precise_file_ids.add(new_parent_id)
1238
if (result[6][0] == 'directory' and
1239
result[6][1] != 'directory'):
1240
# This stopped being a directory, the old children have
1242
if old_entry is None:
1243
# Reusing a discarded change.
1244
old_entry = self._get_entry(self.source, file_id)
1245
for child in old_entry.children.values():
1246
precise_file_ids.add(child.file_id)
1247
changed_file_ids.add(result[0])
1251
class MultiWalker(object):
1252
"""Walk multiple trees simultaneously, getting combined results."""
1254
# Note: This could be written to not assume you can do out-of-order
1255
# lookups. Instead any nodes that don't match in all trees could be
1256
# marked as 'deferred', and then returned in the final cleanup loop.
1257
# For now, I think it is "nicer" to return things as close to the
1258
# "master_tree" order as we can.
1260
def __init__(self, master_tree, other_trees):
1261
"""Create a new MultiWalker.
1263
All trees being walked must implement "iter_entries_by_dir()", such
1264
that they yield (path, object) tuples, where that object will have a
1265
'.file_id' member, that can be used to check equality.
1267
:param master_tree: All trees will be 'slaved' to the master_tree such
1268
that nodes in master_tree will be used as 'first-pass' sync points.
1269
Any nodes that aren't in master_tree will be merged in a second
1271
:param other_trees: A list of other trees to walk simultaneously.
1273
self._master_tree = master_tree
1274
self._other_trees = other_trees
1276
# Keep track of any nodes that were properly processed just out of
1277
# order, that way we don't return them at the end, we don't have to
1278
# track *all* processed file_ids, just the out-of-order ones
1279
self._out_of_order_processed = set()
1282
def _step_one(iterator):
1283
"""Step an iter_entries_by_dir iterator.
1285
:return: (has_more, path, ie)
1286
If has_more is False, path and ie will be None.
1289
path, ie = iterator.next()
1290
except StopIteration:
1291
return False, None, None
1293
return True, path, ie
1296
def _cmp_path_by_dirblock(path1, path2):
1297
"""Compare two paths based on what directory they are in.
1299
This generates a sort order, such that all children of a directory are
1300
sorted together, and grandchildren are in the same order as the
1301
children appear. But all grandchildren come after all children.
1303
:param path1: first path
1304
:param path2: the second path
1305
:return: negative number if ``path1`` comes first,
1306
0 if paths are equal
1307
and a positive number if ``path2`` sorts first
1309
# Shortcut this special case
1312
# This is stolen from _dirstate_helpers_py.py, only switching it to
1313
# Unicode objects. Consider using encode_utf8() and then using the
1314
# optimized versions, or maybe writing optimized unicode versions.
1315
if not isinstance(path1, unicode):
1316
raise TypeError("'path1' must be a unicode string, not %s: %r"
1317
% (type(path1), path1))
1318
if not isinstance(path2, unicode):
1319
raise TypeError("'path2' must be a unicode string, not %s: %r"
1320
% (type(path2), path2))
1321
return cmp(MultiWalker._path_to_key(path1),
1322
MultiWalker._path_to_key(path2))
1325
def _path_to_key(path):
1326
dirname, basename = osutils.split(path)
1327
return (dirname.split(u'/'), basename)
1329
def _lookup_by_file_id(self, extra_entries, other_tree, file_id):
1330
"""Lookup an inventory entry by file_id.
1332
This is called when an entry is missing in the normal order.
1333
Generally this is because a file was either renamed, or it was
1334
deleted/added. If the entry was found in the inventory and not in
1335
extra_entries, it will be added to self._out_of_order_processed
1337
:param extra_entries: A dictionary of {file_id: (path, ie)}. This
1338
should be filled with entries that were found before they were
1339
used. If file_id is present, it will be removed from the
1341
:param other_tree: The Tree to search, in case we didn't find the entry
1343
:param file_id: The file_id to look for
1344
:return: (path, ie) if found or (None, None) if not present.
1346
if file_id in extra_entries:
1347
return extra_entries.pop(file_id)
1348
# TODO: Is id2path better as the first call, or is
1349
# inventory[file_id] better as a first check?
1351
cur_path = other_tree.id2path(file_id)
1352
except errors.NoSuchId:
1354
if cur_path is None:
1357
self._out_of_order_processed.add(file_id)
1358
cur_ie = other_tree.inventory[file_id]
1359
return (cur_path, cur_ie)
1362
"""Match up the values in the different trees."""
1363
for result in self._walk_master_tree():
1365
self._finish_others()
1366
for result in self._walk_others():
1369
def _walk_master_tree(self):
1370
"""First pass, walk all trees in lock-step.
1372
When we are done, all nodes in the master_tree will have been
1373
processed. _other_walkers, _other_entries, and _others_extra will be
1374
set on 'self' for future processing.
1376
# This iterator has the most "inlining" done, because it tends to touch
1377
# every file in the tree, while the others only hit nodes that don't
1379
master_iterator = self._master_tree.iter_entries_by_dir()
1381
other_walkers = [other.iter_entries_by_dir()
1382
for other in self._other_trees]
1383
other_entries = [self._step_one(walker) for walker in other_walkers]
1384
# Track extra nodes in the other trees
1385
others_extra = [{} for i in xrange(len(self._other_trees))]
1387
master_has_more = True
1388
step_one = self._step_one
1389
lookup_by_file_id = self._lookup_by_file_id
1390
out_of_order_processed = self._out_of_order_processed
1392
while master_has_more:
1393
(master_has_more, path, master_ie) = step_one(master_iterator)
1394
if not master_has_more:
1397
file_id = master_ie.file_id
1399
other_values_append = other_values.append
1400
next_other_entries = []
1401
next_other_entries_append = next_other_entries.append
1402
for idx, (other_has_more, other_path, other_ie) in enumerate(other_entries):
1403
if not other_has_more:
1404
other_values_append(lookup_by_file_id(
1405
others_extra[idx], self._other_trees[idx], file_id))
1406
next_other_entries_append((False, None, None))
1407
elif file_id == other_ie.file_id:
1408
# This is the critical code path, as most of the entries
1409
# should match between most trees.
1410
other_values_append((other_path, other_ie))
1411
next_other_entries_append(step_one(other_walkers[idx]))
1413
# This walker did not match, step it until it either
1414
# matches, or we know we are past the current walker.
1415
other_walker = other_walkers[idx]
1416
other_extra = others_extra[idx]
1417
while (other_has_more and
1418
self._cmp_path_by_dirblock(other_path, path) < 0):
1419
other_file_id = other_ie.file_id
1420
if other_file_id not in out_of_order_processed:
1421
other_extra[other_file_id] = (other_path, other_ie)
1422
other_has_more, other_path, other_ie = \
1423
step_one(other_walker)
1424
if other_has_more and other_ie.file_id == file_id:
1425
# We ended up walking to this point, match and step
1427
other_values_append((other_path, other_ie))
1428
other_has_more, other_path, other_ie = \
1429
step_one(other_walker)
1431
# This record isn't in the normal order, see if it
1433
other_values_append(lookup_by_file_id(
1434
other_extra, self._other_trees[idx], file_id))
1435
next_other_entries_append((other_has_more, other_path,
1437
other_entries = next_other_entries
1439
# We've matched all the walkers, yield this datapoint
1440
yield path, file_id, master_ie, other_values
1441
self._other_walkers = other_walkers
1442
self._other_entries = other_entries
1443
self._others_extra = others_extra
1445
def _finish_others(self):
1446
"""Finish walking the other iterators, so we get all entries."""
1447
for idx, info in enumerate(self._other_entries):
1448
other_extra = self._others_extra[idx]
1449
(other_has_more, other_path, other_ie) = info
1450
while other_has_more:
1451
other_file_id = other_ie.file_id
1452
if other_file_id not in self._out_of_order_processed:
1453
other_extra[other_file_id] = (other_path, other_ie)
1454
other_has_more, other_path, other_ie = \
1455
self._step_one(self._other_walkers[idx])
1456
del self._other_entries
1458
def _walk_others(self):
1459
"""Finish up by walking all the 'deferred' nodes."""
1460
# TODO: One alternative would be to grab all possible unprocessed
1461
# file_ids, and then sort by path, and then yield them. That
1462
# might ensure better ordering, in case a caller strictly
1463
# requires parents before children.
1464
for idx, other_extra in enumerate(self._others_extra):
1465
others = sorted(other_extra.itervalues(),
1466
key=lambda x: self._path_to_key(x[0]))
1467
for other_path, other_ie in others:
1468
file_id = other_ie.file_id
1469
# We don't need to check out_of_order_processed here, because
1470
# the lookup_by_file_id will be removing anything processed
1471
# from the extras cache
1472
other_extra.pop(file_id)
1473
other_values = [(None, None) for i in xrange(idx)]
1474
other_values.append((other_path, other_ie))
1475
for alt_idx, alt_extra in enumerate(self._others_extra[idx+1:]):
1476
alt_idx = alt_idx + idx + 1
1477
alt_extra = self._others_extra[alt_idx]
1478
alt_tree = self._other_trees[alt_idx]
1479
other_values.append(self._lookup_by_file_id(
1480
alt_extra, alt_tree, file_id))
1481
yield other_path, file_id, None, other_values
added
removed
bzrlib/tree.py
