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# Copyright (C) 2005-2011 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 bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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conflicts as _mod_conflicts,
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revision as _mod_revision,
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from bzrlib.i18n import gettext
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from bzrlib.decorators import needs_read_lock
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from bzrlib.inter import InterObject
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from bzrlib.symbol_versioning import (
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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 can be compared, etc, regardless of whether they are working
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trees or versioned trees.
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def has_versioned_directories(self):
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"""Whether this tree can contain explicitly versioned directories.
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This defaults to True, but some implementations may want to override
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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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"""See InterTree.iter_changes"""
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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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raise NotImplementedError(self.has_id)
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@deprecated_method(deprecated_in((2, 4, 0)))
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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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raise NotImplementedError(self.has_or_had_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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def all_file_ids(self):
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"""Iterate through all file ids, including ids for missing files."""
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raise NotImplementedError(self.all_file_ids)
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def id2path(self, file_id):
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"""Return the path for a file id.
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raise NotImplementedError(self.id2path)
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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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raise NotImplementedError(self.iter_entries_by_dir)
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def list_files(self, include_root=False, from_dir=None, recursive=True):
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"""List all files in this tree.
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:param include_root: Whether to include the entry for the tree root
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:param from_dir: Directory under which to list files
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:param recursive: Whether to list files recursively
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:return: iterator over tuples of (path, versioned, kind, file_id,
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raise NotImplementedError(self.list_files)
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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_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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:returns: A single byte string for the whole file.
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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_verifier(self, file_id, path=None, stat_value=None):
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"""Return a verifier for a file.
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The default implementation returns a sha1.
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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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:param stat_value: Optional stat value for the object
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:return: Tuple with verifier name and verifier data
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return ("SHA1", self.get_file_sha1(file_id, path=path,
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stat_value=stat_value))
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def get_file_sha1(self, file_id, path=None, stat_value=None):
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"""Return the SHA1 file for a file.
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:note: callers should use get_file_verifier instead
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where possible, as the underlying repository implementation may
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have quicker access to a non-sha1 verifier.
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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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:param stat_value: Optional stat value for the object
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raise NotImplementedError(self.get_file_sha1)
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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 is_executable(self, file_id, path=None):
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"""Check if a file is executable.
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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.is_executable)
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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, path=None):
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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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: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: The path the symlink points to.
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raise NotImplementedError(self.get_symlink_target)
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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 _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, t.get_file_revision(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_lines(file_id))
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repo = self.branch.repository
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last_revision = self.get_file_revision(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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def _check_retrieved(self, ie, f):
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fp = osutils.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 errors.BzrError(
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"mismatched size for file %r in %r" %
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(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 errors.BzrError("wrong SHA-1 for file %r in %r" %
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(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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raise NotImplementedError(self.path2id)
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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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"""Lock this tree for multiple read only operations.
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:return: A bzrlib.lock.LogicalLockResult.
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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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raise NotImplementedError(self.filter_unversioned_files)
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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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trace.note(gettext("*** {0} content-filter: {1} => {2!r}").format(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,
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_default_searcher=None):
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"""Find the preferences for filenames in a tree.
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:param path_names: an iterable of paths to find attributes for.
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Paths are given relative to the root of the tree.
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:param pref_names: the list of preferences to lookup - None for all
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:param _default_searcher: private parameter to assist testing - don't use
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:return: an iterator of tuple sequences, one per path-name.
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See _RulesSearcher.get_items for details on the tuple sequence.
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if _default_searcher is None:
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_default_searcher = rules._per_user_searcher
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searcher = self._get_rules_searcher(_default_searcher)
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if searcher is not None:
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if pref_names is not None:
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for path in path_names:
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yield searcher.get_selected_items(path, pref_names)
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for path in path_names:
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yield searcher.get_items(path)
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def _get_rules_searcher(self, default_searcher):
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"""Get the RulesSearcher for this tree given the default one."""
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searcher = default_searcher
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class InventoryTree(Tree):
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"""A tree that relies on an inventory for its metadata.
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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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Subclasses should set the _inventory attribute, which is considered
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private to external API users.
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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.
695
:return: A list of paths, with each item the corresponding input path
696
adjusted to account for existing elements that match case
699
return list(self._yield_canonical_inventory_paths(paths))
701
def get_canonical_inventory_path(self, path):
702
"""Returns the first inventory item that case-insensitively matches path.
704
If a path matches exactly, it is returned. If no path matches exactly
705
but more than one path matches case-insensitively, it is implementation
706
defined which is returned.
708
If no path matches case-insensitively, the input path is returned, but
709
with as many path entries that do exist changed to their canonical
712
If you need to resolve many names from the same tree, you should
713
use get_canonical_inventory_paths() to avoid O(N) behaviour.
715
:param path: A paths relative to the root of the tree.
716
:return: The input path adjusted to account for existing elements
717
that match case insensitively.
719
return self._yield_canonical_inventory_paths([path]).next()
721
def _yield_canonical_inventory_paths(self, paths):
723
# First, if the path as specified exists exactly, just use it.
724
if self.path2id(path) is not None:
728
cur_id = self.get_root_id()
730
bit_iter = iter(path.split("/"))
734
for child in self.iter_children(cur_id):
736
# XXX: it seem like if the child is known to be in the
737
# tree, we shouldn't need to go from its id back to
738
# its path -- mbp 2010-02-11
740
# XXX: it seems like we could be more efficient
741
# by just directly looking up the original name and
742
# only then searching all children; also by not
743
# chopping paths so much. -- mbp 2010-02-11
744
child_base = os.path.basename(self.id2path(child))
745
if (child_base == elt):
746
# if we found an exact match, we can stop now; if
747
# we found an approximate match we need to keep
748
# searching because there might be an exact match
751
new_path = osutils.pathjoin(cur_path, child_base)
753
elif child_base.lower() == lelt:
755
new_path = osutils.pathjoin(cur_path, child_base)
756
except errors.NoSuchId:
757
# before a change is committed we can see this error...
762
# got to the end of this directory and no entries matched.
763
# Return what matched so far, plus the rest as specified.
764
cur_path = osutils.pathjoin(cur_path, elt, *list(bit_iter))
769
def _get_inventory(self):
770
return self._inventory
772
inventory = property(_get_inventory,
773
doc="Inventory of this Tree")
776
def path2id(self, path):
777
"""Return the id for path in this tree."""
778
return self._inventory.path2id(path)
780
def id2path(self, file_id):
781
"""Return the path for a file id.
785
return self.inventory.id2path(file_id)
787
def has_id(self, file_id):
788
return self.inventory.has_id(file_id)
790
def has_or_had_id(self, file_id):
791
return self.inventory.has_id(file_id)
793
def all_file_ids(self):
794
return set(self.inventory)
796
@deprecated_method(deprecated_in((2, 4, 0)))
798
return iter(self.inventory)
800
def filter_unversioned_files(self, paths):
801
"""Filter out paths that are versioned.
803
:return: set of paths.
805
# NB: we specifically *don't* call self.has_filename, because for
806
# WorkingTrees that can indicate files that exist on disk but that
808
pred = self.inventory.has_filename
809
return set((p for p in paths if not pred(p)))
812
def iter_entries_by_dir(self, specific_file_ids=None, yield_parents=False):
813
"""Walk the tree in 'by_dir' order.
815
This will yield each entry in the tree as a (path, entry) tuple.
816
The order that they are yielded is:
818
See Tree.iter_entries_by_dir for details.
820
:param yield_parents: If True, yield the parents from the root leading
821
down to specific_file_ids that have been requested. This has no
822
impact if specific_file_ids is None.
824
return self.inventory.iter_entries_by_dir(
825
specific_file_ids=specific_file_ids, yield_parents=yield_parents)
827
@deprecated_method(deprecated_in((2, 5, 0)))
828
def get_file_by_path(self, path):
829
return self.get_file(self.path2id(path), path)
832
def find_ids_across_trees(filenames, trees, require_versioned=True):
833
"""Find the ids corresponding to specified filenames.
835
All matches in all trees will be used, and all children of matched
836
directories will be used.
838
:param filenames: The filenames to find file_ids for (if None, returns
840
:param trees: The trees to find file_ids within
841
:param require_versioned: if true, all specified filenames must occur in
843
:return: a set of file ids for the specified filenames and their children.
847
specified_path_ids = _find_ids_across_trees(filenames, trees,
849
return _find_children_across_trees(specified_path_ids, trees)
852
def _find_ids_across_trees(filenames, trees, require_versioned):
853
"""Find the ids corresponding to specified filenames.
855
All matches in all trees will be used, but subdirectories are not scanned.
857
:param filenames: The filenames to find file_ids for
858
:param trees: The trees to find file_ids within
859
:param require_versioned: if true, all specified filenames must occur in
861
:return: a set of file ids for the specified filenames
864
interesting_ids = set()
865
for tree_path in filenames:
868
file_id = tree.path2id(tree_path)
869
if file_id is not None:
870
interesting_ids.add(file_id)
873
not_versioned.append(tree_path)
874
if len(not_versioned) > 0 and require_versioned:
875
raise errors.PathsNotVersionedError(not_versioned)
876
return interesting_ids
879
def _find_children_across_trees(specified_ids, trees):
880
"""Return a set including specified ids and their children.
882
All matches in all trees will be used.
884
:param trees: The trees to find file_ids within
885
:return: a set containing all specified ids and their children
887
interesting_ids = set(specified_ids)
888
pending = interesting_ids
889
# now handle children of interesting ids
890
# we loop so that we handle all children of each id in both trees
891
while len(pending) > 0:
893
for file_id in pending:
895
if not tree.has_or_had_id(file_id):
897
for child_id in tree.iter_children(file_id):
898
if child_id not in interesting_ids:
899
new_pending.add(child_id)
900
interesting_ids.update(new_pending)
901
pending = new_pending
902
return interesting_ids
905
class InterTree(InterObject):
906
"""This class represents operations taking place between two Trees.
908
Its instances have methods like 'compare' and contain references to the
909
source and target trees these operations are to be carried out on.
911
Clients of bzrlib should not need to use InterTree directly, rather they
912
should use the convenience methods on Tree such as 'Tree.compare()' which
913
will pass through to InterTree as appropriate.
916
# Formats that will be used to test this InterTree. If both are
917
# None, this InterTree will not be tested (e.g. because a complex
919
_matching_from_tree_format = None
920
_matching_to_tree_format = None
925
def is_compatible(kls, source, target):
926
# The default implementation is naive and uses the public API, so
927
# it works for all trees.
930
def _changes_from_entries(self, source_entry, target_entry,
931
source_path=None, target_path=None):
932
"""Generate a iter_changes tuple between source_entry and target_entry.
934
:param source_entry: An inventory entry from self.source, or None.
935
:param target_entry: An inventory entry from self.target, or None.
936
:param source_path: The path of source_entry, if known. If not known
937
it will be looked up.
938
:param target_path: The path of target_entry, if known. If not known
939
it will be looked up.
940
:return: A tuple, item 0 of which is an iter_changes result tuple, and
941
item 1 is True if there are any changes in the result tuple.
943
if source_entry is None:
944
if target_entry is None:
946
file_id = target_entry.file_id
948
file_id = source_entry.file_id
949
if source_entry is not None:
950
source_versioned = True
951
source_name = source_entry.name
952
source_parent = source_entry.parent_id
953
if source_path is None:
954
source_path = self.source.id2path(file_id)
955
source_kind, source_executable, source_stat = \
956
self.source._comparison_data(source_entry, source_path)
958
source_versioned = False
962
source_executable = None
963
if target_entry is not None:
964
target_versioned = True
965
target_name = target_entry.name
966
target_parent = target_entry.parent_id
967
if target_path is None:
968
target_path = self.target.id2path(file_id)
969
target_kind, target_executable, target_stat = \
970
self.target._comparison_data(target_entry, target_path)
972
target_versioned = False
976
target_executable = None
977
versioned = (source_versioned, target_versioned)
978
kind = (source_kind, target_kind)
979
changed_content = False
980
if source_kind != target_kind:
981
changed_content = True
982
elif source_kind == 'file':
983
if not self.file_content_matches(file_id, file_id, source_path,
984
target_path, source_stat, target_stat):
985
changed_content = True
986
elif source_kind == 'symlink':
987
if (self.source.get_symlink_target(file_id) !=
988
self.target.get_symlink_target(file_id)):
989
changed_content = True
990
# XXX: Yes, the indentation below is wrong. But fixing it broke
991
# test_merge.TestMergerEntriesLCAOnDisk.
992
# test_nested_tree_subtree_renamed_and_modified. We'll wait for
993
# the fix from bzr.dev -- vila 2009026
994
elif source_kind == 'tree-reference':
995
if (self.source.get_reference_revision(file_id, source_path)
996
!= self.target.get_reference_revision(file_id, target_path)):
997
changed_content = True
998
parent = (source_parent, target_parent)
999
name = (source_name, target_name)
1000
executable = (source_executable, target_executable)
1001
if (changed_content is not False or versioned[0] != versioned[1]
1002
or parent[0] != parent[1] or name[0] != name[1] or
1003
executable[0] != executable[1]):
1007
return (file_id, (source_path, target_path), changed_content,
1008
versioned, parent, name, kind, executable), changes
1011
def compare(self, want_unchanged=False, specific_files=None,
1012
extra_trees=None, require_versioned=False, include_root=False,
1013
want_unversioned=False):
1014
"""Return the changes from source to target.
1016
:return: A TreeDelta.
1017
:param specific_files: An optional list of file paths to restrict the
1018
comparison to. When mapping filenames to ids, all matches in all
1019
trees (including optional extra_trees) are used, and all children of
1020
matched directories are included.
1021
:param want_unchanged: An optional boolean requesting the inclusion of
1022
unchanged entries in the result.
1023
:param extra_trees: An optional list of additional trees to use when
1024
mapping the contents of specific_files (paths) to file_ids.
1025
:param require_versioned: An optional boolean (defaults to False). When
1026
supplied and True all the 'specific_files' must be versioned, or
1027
a PathsNotVersionedError will be thrown.
1028
:param want_unversioned: Scan for unversioned paths.
1030
trees = (self.source,)
1031
if extra_trees is not None:
1032
trees = trees + tuple(extra_trees)
1033
# target is usually the newer tree:
1034
specific_file_ids = self.target.paths2ids(specific_files, trees,
1035
require_versioned=require_versioned)
1036
if specific_files and not specific_file_ids:
1037
# All files are unversioned, so just return an empty delta
1038
# _compare_trees would think we want a complete delta
1039
result = delta.TreeDelta()
1040
fake_entry = inventory.InventoryFile('unused', 'unused', 'unused')
1041
result.unversioned = [(path, None,
1042
self.target._comparison_data(fake_entry, path)[0]) for path in
1045
return delta._compare_trees(self.source, self.target, want_unchanged,
1046
specific_files, include_root, extra_trees=extra_trees,
1047
require_versioned=require_versioned,
1048
want_unversioned=want_unversioned)
1050
def iter_changes(self, include_unchanged=False,
1051
specific_files=None, pb=None, extra_trees=[],
1052
require_versioned=True, want_unversioned=False):
1053
"""Generate an iterator of changes between trees.
1055
A tuple is returned:
1056
(file_id, (path_in_source, path_in_target),
1057
changed_content, versioned, parent, name, kind,
1060
Changed_content is True if the file's content has changed. This
1061
includes changes to its kind, and to a symlink's target.
1063
versioned, parent, name, kind, executable are tuples of (from, to).
1064
If a file is missing in a tree, its kind is None.
1066
Iteration is done in parent-to-child order, relative to the target
1069
There is no guarantee that all paths are in sorted order: the
1070
requirement to expand the search due to renames may result in children
1071
that should be found early being found late in the search, after
1072
lexically later results have been returned.
1073
:param require_versioned: Raise errors.PathsNotVersionedError if a
1074
path in the specific_files list is not versioned in one of
1075
source, target or extra_trees.
1076
:param specific_files: An optional list of file paths to restrict the
1077
comparison to. When mapping filenames to ids, all matches in all
1078
trees (including optional extra_trees) are used, and all children
1079
of matched directories are included. The parents in the target tree
1080
of the specific files up to and including the root of the tree are
1081
always evaluated for changes too.
1082
:param want_unversioned: Should unversioned files be returned in the
1083
output. An unversioned file is defined as one with (False, False)
1084
for the versioned pair.
1086
lookup_trees = [self.source]
1088
lookup_trees.extend(extra_trees)
1089
# The ids of items we need to examine to insure delta consistency.
1090
precise_file_ids = set()
1091
changed_file_ids = []
1092
if specific_files == []:
1093
specific_file_ids = []
1095
specific_file_ids = self.target.paths2ids(specific_files,
1096
lookup_trees, require_versioned=require_versioned)
1097
if specific_files is not None:
1098
# reparented or added entries must have their parents included
1099
# so that valid deltas can be created. The seen_parents set
1100
# tracks the parents that we need to have.
1101
# The seen_dirs set tracks directory entries we've yielded.
1102
# After outputting version object in to_entries we set difference
1103
# the two seen sets and start checking parents.
1104
seen_parents = set()
1106
if want_unversioned:
1107
all_unversioned = sorted([(p.split('/'), p) for p in
1108
self.target.extras()
1109
if specific_files is None or
1110
osutils.is_inside_any(specific_files, p)])
1111
all_unversioned = collections.deque(all_unversioned)
1113
all_unversioned = collections.deque()
1115
from_entries_by_dir = list(self.source.iter_entries_by_dir(
1116
specific_file_ids=specific_file_ids))
1117
from_data = dict((e.file_id, (p, e)) for p, e in from_entries_by_dir)
1118
to_entries_by_dir = list(self.target.iter_entries_by_dir(
1119
specific_file_ids=specific_file_ids))
1120
num_entries = len(from_entries_by_dir) + len(to_entries_by_dir)
1122
# the unversioned path lookup only occurs on real trees - where there
1123
# can be extras. So the fake_entry is solely used to look up
1124
# executable it values when execute is not supported.
1125
fake_entry = inventory.InventoryFile('unused', 'unused', 'unused')
1126
for target_path, target_entry in to_entries_by_dir:
1127
while (all_unversioned and
1128
all_unversioned[0][0] < target_path.split('/')):
1129
unversioned_path = all_unversioned.popleft()
1130
target_kind, target_executable, target_stat = \
1131
self.target._comparison_data(fake_entry, unversioned_path[1])
1132
yield (None, (None, unversioned_path[1]), True, (False, False),
1134
(None, unversioned_path[0][-1]),
1135
(None, target_kind),
1136
(None, target_executable))
1137
source_path, source_entry = from_data.get(target_entry.file_id,
1139
result, changes = self._changes_from_entries(source_entry,
1140
target_entry, source_path=source_path, target_path=target_path)
1141
to_paths[result[0]] = result[1][1]
1146
pb.update('comparing files', entry_count, num_entries)
1147
if changes or include_unchanged:
1148
if specific_file_ids is not None:
1149
new_parent_id = result[4][1]
1150
precise_file_ids.add(new_parent_id)
1151
changed_file_ids.append(result[0])
1153
# Ensure correct behaviour for reparented/added specific files.
1154
if specific_files is not None:
1155
# Record output dirs
1156
if result[6][1] == 'directory':
1157
seen_dirs.add(result[0])
1158
# Record parents of reparented/added entries.
1159
versioned = result[3]
1161
if not versioned[0] or parents[0] != parents[1]:
1162
seen_parents.add(parents[1])
1163
while all_unversioned:
1164
# yield any trailing unversioned paths
1165
unversioned_path = all_unversioned.popleft()
1166
to_kind, to_executable, to_stat = \
1167
self.target._comparison_data(fake_entry, unversioned_path[1])
1168
yield (None, (None, unversioned_path[1]), True, (False, False),
1170
(None, unversioned_path[0][-1]),
1172
(None, to_executable))
1173
# Yield all remaining source paths
1174
for path, from_entry in from_entries_by_dir:
1175
file_id = from_entry.file_id
1176
if file_id in to_paths:
1179
if not self.target.has_id(file_id):
1180
# common case - paths we have not emitted are not present in
1184
to_path = self.target.id2path(file_id)
1187
pb.update('comparing files', entry_count, num_entries)
1188
versioned = (True, False)
1189
parent = (from_entry.parent_id, None)
1190
name = (from_entry.name, None)
1191
from_kind, from_executable, stat_value = \
1192
self.source._comparison_data(from_entry, path)
1193
kind = (from_kind, None)
1194
executable = (from_executable, None)
1195
changed_content = from_kind is not None
1196
# the parent's path is necessarily known at this point.
1197
changed_file_ids.append(file_id)
1198
yield(file_id, (path, to_path), changed_content, versioned, parent,
1199
name, kind, executable)
1200
changed_file_ids = set(changed_file_ids)
1201
if specific_file_ids is not None:
1202
for result in self._handle_precise_ids(precise_file_ids,
1206
def _get_entry(self, tree, file_id):
1207
"""Get an inventory entry from a tree, with missing entries as None.
1209
If the tree raises NotImplementedError on accessing .inventory, then
1210
this is worked around using iter_entries_by_dir on just the file id
1213
:param tree: The tree to lookup the entry in.
1214
:param file_id: The file_id to lookup.
1217
inventory = tree.inventory
1218
except NotImplementedError:
1219
# No inventory available.
1221
iterator = tree.iter_entries_by_dir(specific_file_ids=[file_id])
1222
return iterator.next()[1]
1223
except StopIteration:
1227
return inventory[file_id]
1228
except errors.NoSuchId:
1231
def _handle_precise_ids(self, precise_file_ids, changed_file_ids,
1232
discarded_changes=None):
1233
"""Fill out a partial iter_changes to be consistent.
1235
:param precise_file_ids: The file ids of parents that were seen during
1237
:param changed_file_ids: The file ids of already emitted items.
1238
:param discarded_changes: An optional dict of precalculated
1239
iter_changes items which the partial iter_changes had not output
1241
:return: A generator of iter_changes items to output.
1243
# process parents of things that had changed under the users
1244
# requested paths to prevent incorrect paths or parent ids which
1245
# aren't in the tree.
1246
while precise_file_ids:
1247
precise_file_ids.discard(None)
1248
# Don't emit file_ids twice
1249
precise_file_ids.difference_update(changed_file_ids)
1250
if not precise_file_ids:
1252
# If the there was something at a given output path in source, we
1253
# have to include the entry from source in the delta, or we would
1254
# be putting this entry into a used path.
1256
for parent_id in precise_file_ids:
1258
paths.append(self.target.id2path(parent_id))
1259
except errors.NoSuchId:
1260
# This id has been dragged in from the source by delta
1261
# expansion and isn't present in target at all: we don't
1262
# need to check for path collisions on it.
1265
old_id = self.source.path2id(path)
1266
precise_file_ids.add(old_id)
1267
precise_file_ids.discard(None)
1268
current_ids = precise_file_ids
1269
precise_file_ids = set()
1270
# We have to emit all of precise_file_ids that have been altered.
1271
# We may have to output the children of some of those ids if any
1272
# directories have stopped being directories.
1273
for file_id in current_ids:
1275
if discarded_changes:
1276
result = discarded_changes.get(file_id)
1281
old_entry = self._get_entry(self.source, file_id)
1282
new_entry = self._get_entry(self.target, file_id)
1283
result, changes = self._changes_from_entries(
1284
old_entry, new_entry)
1287
# Get this parents parent to examine.
1288
new_parent_id = result[4][1]
1289
precise_file_ids.add(new_parent_id)
1291
if (result[6][0] == 'directory' and
1292
result[6][1] != 'directory'):
1293
# This stopped being a directory, the old children have
1295
if old_entry is None:
1296
# Reusing a discarded change.
1297
old_entry = self._get_entry(self.source, file_id)
1298
for child in old_entry.children.values():
1299
precise_file_ids.add(child.file_id)
1300
changed_file_ids.add(result[0])
1304
def file_content_matches(self, source_file_id, target_file_id,
1305
source_path=None, target_path=None, source_stat=None, target_stat=None):
1306
"""Check if two files are the same in the source and target trees.
1308
This only checks that the contents of the files are the same,
1309
it does not touch anything else.
1311
:param source_file_id: File id of the file in the source tree
1312
:param target_file_id: File id of the file in the target tree
1313
:param source_path: Path of the file in the source tree
1314
:param target_path: Path of the file in the target tree
1315
:param source_stat: Optional stat value of the file in the source tree
1316
:param target_stat: Optional stat value of the file in the target tree
1317
:return: Boolean indicating whether the files have the same contents
1319
source_verifier_kind, source_verifier_data = self.source.get_file_verifier(
1320
source_file_id, source_path, source_stat)
1321
target_verifier_kind, target_verifier_data = self.target.get_file_verifier(
1322
target_file_id, target_path, target_stat)
1323
if source_verifier_kind == target_verifier_kind:
1324
return (source_verifier_data == target_verifier_data)
1325
# Fall back to SHA1 for now
1326
if source_verifier_kind != "SHA1":
1327
source_sha1 = self.source.get_file_sha1(source_file_id,
1328
source_path, source_stat)
1330
source_sha1 = source_verifier_data
1331
if target_verifier_kind != "SHA1":
1332
target_sha1 = self.target.get_file_sha1(target_file_id,
1333
target_path, target_stat)
1335
target_sha1 = target_verifier_data
1336
return (source_sha1 == target_sha1)
1338
InterTree.register_optimiser(InterTree)
1341
class MultiWalker(object):
1342
"""Walk multiple trees simultaneously, getting combined results."""
1344
# Note: This could be written to not assume you can do out-of-order
1345
# lookups. Instead any nodes that don't match in all trees could be
1346
# marked as 'deferred', and then returned in the final cleanup loop.
1347
# For now, I think it is "nicer" to return things as close to the
1348
# "master_tree" order as we can.
1350
def __init__(self, master_tree, other_trees):
1351
"""Create a new MultiWalker.
1353
All trees being walked must implement "iter_entries_by_dir()", such
1354
that they yield (path, object) tuples, where that object will have a
1355
'.file_id' member, that can be used to check equality.
1357
:param master_tree: All trees will be 'slaved' to the master_tree such
1358
that nodes in master_tree will be used as 'first-pass' sync points.
1359
Any nodes that aren't in master_tree will be merged in a second
1361
:param other_trees: A list of other trees to walk simultaneously.
1363
self._master_tree = master_tree
1364
self._other_trees = other_trees
1366
# Keep track of any nodes that were properly processed just out of
1367
# order, that way we don't return them at the end, we don't have to
1368
# track *all* processed file_ids, just the out-of-order ones
1369
self._out_of_order_processed = set()
1372
def _step_one(iterator):
1373
"""Step an iter_entries_by_dir iterator.
1375
:return: (has_more, path, ie)
1376
If has_more is False, path and ie will be None.
1379
path, ie = iterator.next()
1380
except StopIteration:
1381
return False, None, None
1383
return True, path, ie
1386
def _cmp_path_by_dirblock(path1, path2):
1387
"""Compare two paths based on what directory they are in.
1389
This generates a sort order, such that all children of a directory are
1390
sorted together, and grandchildren are in the same order as the
1391
children appear. But all grandchildren come after all children.
1393
:param path1: first path
1394
:param path2: the second path
1395
:return: negative number if ``path1`` comes first,
1396
0 if paths are equal
1397
and a positive number if ``path2`` sorts first
1399
# Shortcut this special case
1402
# This is stolen from _dirstate_helpers_py.py, only switching it to
1403
# Unicode objects. Consider using encode_utf8() and then using the
1404
# optimized versions, or maybe writing optimized unicode versions.
1405
if not isinstance(path1, unicode):
1406
raise TypeError("'path1' must be a unicode string, not %s: %r"
1407
% (type(path1), path1))
1408
if not isinstance(path2, unicode):
1409
raise TypeError("'path2' must be a unicode string, not %s: %r"
1410
% (type(path2), path2))
1411
return cmp(MultiWalker._path_to_key(path1),
1412
MultiWalker._path_to_key(path2))
1415
def _path_to_key(path):
1416
dirname, basename = osutils.split(path)
1417
return (dirname.split(u'/'), basename)
1419
def _lookup_by_file_id(self, extra_entries, other_tree, file_id):
1420
"""Lookup an inventory entry by file_id.
1422
This is called when an entry is missing in the normal order.
1423
Generally this is because a file was either renamed, or it was
1424
deleted/added. If the entry was found in the inventory and not in
1425
extra_entries, it will be added to self._out_of_order_processed
1427
:param extra_entries: A dictionary of {file_id: (path, ie)}. This
1428
should be filled with entries that were found before they were
1429
used. If file_id is present, it will be removed from the
1431
:param other_tree: The Tree to search, in case we didn't find the entry
1433
:param file_id: The file_id to look for
1434
:return: (path, ie) if found or (None, None) if not present.
1436
if file_id in extra_entries:
1437
return extra_entries.pop(file_id)
1438
# TODO: Is id2path better as the first call, or is
1439
# inventory[file_id] better as a first check?
1441
cur_path = other_tree.id2path(file_id)
1442
except errors.NoSuchId:
1444
if cur_path is None:
1447
self._out_of_order_processed.add(file_id)
1448
cur_ie = other_tree.inventory[file_id]
1449
return (cur_path, cur_ie)
1452
"""Match up the values in the different trees."""
1453
for result in self._walk_master_tree():
1455
self._finish_others()
1456
for result in self._walk_others():
1459
def _walk_master_tree(self):
1460
"""First pass, walk all trees in lock-step.
1462
When we are done, all nodes in the master_tree will have been
1463
processed. _other_walkers, _other_entries, and _others_extra will be
1464
set on 'self' for future processing.
1466
# This iterator has the most "inlining" done, because it tends to touch
1467
# every file in the tree, while the others only hit nodes that don't
1469
master_iterator = self._master_tree.iter_entries_by_dir()
1471
other_walkers = [other.iter_entries_by_dir()
1472
for other in self._other_trees]
1473
other_entries = [self._step_one(walker) for walker in other_walkers]
1474
# Track extra nodes in the other trees
1475
others_extra = [{} for i in xrange(len(self._other_trees))]
1477
master_has_more = True
1478
step_one = self._step_one
1479
lookup_by_file_id = self._lookup_by_file_id
1480
out_of_order_processed = self._out_of_order_processed
1482
while master_has_more:
1483
(master_has_more, path, master_ie) = step_one(master_iterator)
1484
if not master_has_more:
1487
file_id = master_ie.file_id
1489
other_values_append = other_values.append
1490
next_other_entries = []
1491
next_other_entries_append = next_other_entries.append
1492
for idx, (other_has_more, other_path, other_ie) in enumerate(other_entries):
1493
if not other_has_more:
1494
other_values_append(lookup_by_file_id(
1495
others_extra[idx], self._other_trees[idx], file_id))
1496
next_other_entries_append((False, None, None))
1497
elif file_id == other_ie.file_id:
1498
# This is the critical code path, as most of the entries
1499
# should match between most trees.
1500
other_values_append((other_path, other_ie))
1501
next_other_entries_append(step_one(other_walkers[idx]))
1503
# This walker did not match, step it until it either
1504
# matches, or we know we are past the current walker.
1505
other_walker = other_walkers[idx]
1506
other_extra = others_extra[idx]
1507
while (other_has_more and
1508
self._cmp_path_by_dirblock(other_path, path) < 0):
1509
other_file_id = other_ie.file_id
1510
if other_file_id not in out_of_order_processed:
1511
other_extra[other_file_id] = (other_path, other_ie)
1512
other_has_more, other_path, other_ie = \
1513
step_one(other_walker)
1514
if other_has_more and other_ie.file_id == file_id:
1515
# We ended up walking to this point, match and step
1517
other_values_append((other_path, other_ie))
1518
other_has_more, other_path, other_ie = \
1519
step_one(other_walker)
1521
# This record isn't in the normal order, see if it
1523
other_values_append(lookup_by_file_id(
1524
other_extra, self._other_trees[idx], file_id))
1525
next_other_entries_append((other_has_more, other_path,
1527
other_entries = next_other_entries
1529
# We've matched all the walkers, yield this datapoint
1530
yield path, file_id, master_ie, other_values
1531
self._other_walkers = other_walkers
1532
self._other_entries = other_entries
1533
self._others_extra = others_extra
1535
def _finish_others(self):
1536
"""Finish walking the other iterators, so we get all entries."""
1537
for idx, info in enumerate(self._other_entries):
1538
other_extra = self._others_extra[idx]
1539
(other_has_more, other_path, other_ie) = info
1540
while other_has_more:
1541
other_file_id = other_ie.file_id
1542
if other_file_id not in self._out_of_order_processed:
1543
other_extra[other_file_id] = (other_path, other_ie)
1544
other_has_more, other_path, other_ie = \
1545
self._step_one(self._other_walkers[idx])
1546
del self._other_entries
1548
def _walk_others(self):
1549
"""Finish up by walking all the 'deferred' nodes."""
1550
# TODO: One alternative would be to grab all possible unprocessed
1551
# file_ids, and then sort by path, and then yield them. That
1552
# might ensure better ordering, in case a caller strictly
1553
# requires parents before children.
1554
for idx, other_extra in enumerate(self._others_extra):
1555
others = sorted(other_extra.itervalues(),
1556
key=lambda x: self._path_to_key(x[0]))
1557
for other_path, other_ie in others:
1558
file_id = other_ie.file_id
1559
# We don't need to check out_of_order_processed here, because
1560
# the lookup_by_file_id will be removing anything processed
1561
# from the extras cache
1562
other_extra.pop(file_id)
1563
other_values = [(None, None) for i in xrange(idx)]
1564
other_values.append((other_path, other_ie))
1565
for alt_idx, alt_extra in enumerate(self._others_extra[idx+1:]):
1566
alt_idx = alt_idx + idx + 1
1567
alt_extra = self._others_extra[alt_idx]
1568
alt_tree = self._other_trees[alt_idx]
1569
other_values.append(self._lookup_by_file_id(
1570
alt_extra, alt_tree, file_id))
1571
yield other_path, file_id, None, other_values
added
removed
bzrlib/tree.py
