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# Copyright (C) 2006, 2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from stat import S_ISREG
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib.errors import (DuplicateKey, MalformedTransform, NoSuchFile,
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ReusingTransform, NotVersionedError, CantMoveRoot,
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ExistingLimbo, ImmortalLimbo, NoFinalPath,
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from bzrlib.inventory import InventoryEntry
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from bzrlib.osutils import (file_kind, supports_executable, pathjoin, lexists,
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delete_any, has_symlinks)
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from bzrlib.progress import DummyProgress, ProgressPhase
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter, warning
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from bzrlib import tree
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import bzrlib.urlutils as urlutils
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ROOT_PARENT = "root-parent"
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def unique_add(map, key, value):
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raise DuplicateKey(key=key)
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class _TransformResults(object):
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def __init__(self, modified_paths, rename_count):
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self.modified_paths = modified_paths
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self.rename_count = rename_count
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class TreeTransform(object):
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"""Represent a tree transformation.
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This object is designed to support incremental generation of the transform,
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However, it gives optimum performance when parent directories are created
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before their contents. The transform is then able to put child files
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directly in their parent directory, avoiding later renames.
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It is easy to produce malformed transforms, but they are generally
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harmless. Attempting to apply a malformed transform will cause an
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exception to be raised before any modifications are made to the tree.
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Many kinds of malformed transforms can be corrected with the
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resolve_conflicts function. The remaining ones indicate programming error,
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such as trying to create a file with no path.
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Two sets of file creation methods are supplied. Convenience methods are:
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These are composed of the low-level methods:
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* create_file or create_directory or create_symlink
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Transform/Transaction ids
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-------------------------
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trans_ids are temporary ids assigned to all files involved in a transform.
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It's possible, even common, that not all files in the Tree have trans_ids.
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trans_ids are used because filenames and file_ids are not good enough
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identifiers; filenames change, and not all files have file_ids. File-ids
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are also associated with trans-ids, so that moving a file moves its
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trans_ids are only valid for the TreeTransform that generated them.
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Limbo is a temporary directory use to hold new versions of files.
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Files are added to limbo by create_file, create_directory, create_symlink,
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and their convenience variants (new_*). Files may be removed from limbo
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using cancel_creation. Files are renamed from limbo into their final
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location as part of TreeTransform.apply
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Limbo must be cleaned up, by either calling TreeTransform.apply or
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calling TreeTransform.finalize.
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Files are placed into limbo inside their parent directories, where
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possible. This reduces subsequent renames, and makes operations involving
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lots of files faster. This optimization is only possible if the parent
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directory is created *before* creating any of its children, so avoid
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creating children before parents, where possible.
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This temporary directory is used by _FileMover for storing files that are
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about to be deleted. In case of rollback, the files will be restored.
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FileMover does not delete files until it is sure that a rollback will not
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def __init__(self, tree, pb=DummyProgress()):
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"""Note: a tree_write lock is taken on the tree.
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Use TreeTransform.finalize() to release the lock (can be omitted if
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TreeTransform.apply() called).
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object.__init__(self)
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self._tree.lock_tree_write()
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control_files = self._tree._control_files
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self._limbodir = urlutils.local_path_from_url(
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control_files.controlfilename('limbo'))
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os.mkdir(self._limbodir)
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if e.errno == errno.EEXIST:
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raise ExistingLimbo(self._limbodir)
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self._deletiondir = urlutils.local_path_from_url(
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control_files.controlfilename('pending-deletion'))
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os.mkdir(self._deletiondir)
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if e.errno == errno.EEXIST:
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raise errors.ExistingPendingDeletion(self._deletiondir)
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# counter used to generate trans-ids (which are locally unique)
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# mapping of trans_id -> new basename
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# mapping of trans_id -> new parent trans_id
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self._new_parent = {}
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# mapping of trans_id with new contents -> new file_kind
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self._new_contents = {}
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# A mapping of transform ids to their limbo filename
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self._limbo_files = {}
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# A mapping of transform ids to a set of the transform ids of children
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# that their limbo directory has
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self._limbo_children = {}
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# Map transform ids to maps of child filename to child transform id
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self._limbo_children_names = {}
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# List of transform ids that need to be renamed from limbo into place
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self._needs_rename = set()
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# Set of trans_ids whose contents will be removed
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self._removed_contents = set()
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# Mapping of trans_id -> new execute-bit value
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self._new_executability = {}
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# Mapping of trans_id -> new tree-reference value
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self._new_reference_revision = {}
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# Mapping of trans_id -> new file_id
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# Mapping of old file-id -> trans_id
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self._non_present_ids = {}
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# Mapping of new file_id -> trans_id
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# Set of file_ids that will be removed
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self._removed_id = set()
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# Mapping of path in old tree -> trans_id
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self._tree_path_ids = {}
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# Mapping trans_id -> path in old tree
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self._tree_id_paths = {}
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# Cache of realpath results, to speed up canonical_path
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# Cache of relpath results, to speed up canonical_path
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# The trans_id that will be used as the tree root
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self._new_root = self.trans_id_tree_file_id(tree.get_root_id())
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# Indictor of whether the transform has been applied
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# A counter of how many files have been renamed
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self.rename_count = 0
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def __get_root(self):
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return self._new_root
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root = property(__get_root)
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"""Release the working tree lock, if held, clean up limbo dir.
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This is required if apply has not been invoked, but can be invoked
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if self._tree is None:
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entries = [(self._limbo_name(t), t, k) for t, k in
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self._new_contents.iteritems()]
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entries.sort(reverse=True)
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for path, trans_id, kind in entries:
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if kind == "directory":
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os.rmdir(self._limbodir)
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# We don't especially care *why* the dir is immortal.
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raise ImmortalLimbo(self._limbodir)
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os.rmdir(self._deletiondir)
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raise errors.ImmortalPendingDeletion(self._deletiondir)
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def _assign_id(self):
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"""Produce a new tranform id"""
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new_id = "new-%s" % self._id_number
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def create_path(self, name, parent):
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"""Assign a transaction id to a new path"""
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trans_id = self._assign_id()
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unique_add(self._new_name, trans_id, name)
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unique_add(self._new_parent, trans_id, parent)
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def adjust_path(self, name, parent, trans_id):
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"""Change the path that is assigned to a transaction id."""
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if trans_id == self._new_root:
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previous_parent = self._new_parent.get(trans_id)
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previous_name = self._new_name.get(trans_id)
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self._new_name[trans_id] = name
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self._new_parent[trans_id] = parent
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if (trans_id in self._limbo_files and
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trans_id not in self._needs_rename):
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self._rename_in_limbo([trans_id])
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self._limbo_children[previous_parent].remove(trans_id)
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del self._limbo_children_names[previous_parent][previous_name]
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def _rename_in_limbo(self, trans_ids):
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"""Fix limbo names so that the right final path is produced.
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This means we outsmarted ourselves-- we tried to avoid renaming
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these files later by creating them with their final names in their
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final parents. But now the previous name or parent is no longer
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suitable, so we have to rename them.
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Even for trans_ids that have no new contents, we must remove their
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entries from _limbo_files, because they are now stale.
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for trans_id in trans_ids:
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old_path = self._limbo_files.pop(trans_id)
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if trans_id not in self._new_contents:
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new_path = self._limbo_name(trans_id)
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os.rename(old_path, new_path)
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def adjust_root_path(self, name, parent):
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"""Emulate moving the root by moving all children, instead.
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We do this by undoing the association of root's transaction id with the
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current tree. This allows us to create a new directory with that
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transaction id. We unversion the root directory and version the
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physically new directory, and hope someone versions the tree root
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old_root = self._new_root
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old_root_file_id = self.final_file_id(old_root)
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# force moving all children of root
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for child_id in self.iter_tree_children(old_root):
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if child_id != parent:
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self.adjust_path(self.final_name(child_id),
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self.final_parent(child_id), child_id)
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file_id = self.final_file_id(child_id)
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if file_id is not None:
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self.unversion_file(child_id)
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self.version_file(file_id, child_id)
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# the physical root needs a new transaction id
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self._tree_path_ids.pop("")
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self._tree_id_paths.pop(old_root)
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self._new_root = self.trans_id_tree_file_id(self._tree.get_root_id())
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if parent == old_root:
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parent = self._new_root
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self.adjust_path(name, parent, old_root)
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self.create_directory(old_root)
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self.version_file(old_root_file_id, old_root)
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self.unversion_file(self._new_root)
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def trans_id_tree_file_id(self, inventory_id):
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"""Determine the transaction id of a working tree file.
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This reflects only files that already exist, not ones that will be
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added by transactions.
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path = self._tree.inventory.id2path(inventory_id)
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return self.trans_id_tree_path(path)
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def trans_id_file_id(self, file_id):
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"""Determine or set the transaction id associated with a file ID.
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A new id is only created for file_ids that were never present. If
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a transaction has been unversioned, it is deliberately still returned.
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(this will likely lead to an unversioned parent conflict.)
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if file_id in self._r_new_id and self._r_new_id[file_id] is not None:
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return self._r_new_id[file_id]
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elif file_id in self._tree.inventory:
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return self.trans_id_tree_file_id(file_id)
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elif file_id in self._non_present_ids:
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return self._non_present_ids[file_id]
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trans_id = self._assign_id()
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self._non_present_ids[file_id] = trans_id
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def canonical_path(self, path):
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"""Get the canonical tree-relative path"""
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# don't follow final symlinks
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abs = self._tree.abspath(path)
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if abs in self._relpaths:
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return self._relpaths[abs]
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dirname, basename = os.path.split(abs)
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if dirname not in self._realpaths:
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self._realpaths[dirname] = os.path.realpath(dirname)
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dirname = self._realpaths[dirname]
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abs = pathjoin(dirname, basename)
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if dirname in self._relpaths:
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relpath = pathjoin(self._relpaths[dirname], basename)
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relpath = relpath.rstrip('/\\')
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relpath = self._tree.relpath(abs)
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self._relpaths[abs] = relpath
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def trans_id_tree_path(self, path):
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"""Determine (and maybe set) the transaction ID for a tree path."""
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path = self.canonical_path(path)
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if path not in self._tree_path_ids:
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self._tree_path_ids[path] = self._assign_id()
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self._tree_id_paths[self._tree_path_ids[path]] = path
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return self._tree_path_ids[path]
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def get_tree_parent(self, trans_id):
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"""Determine id of the parent in the tree."""
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path = self._tree_id_paths[trans_id]
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return self.trans_id_tree_path(os.path.dirname(path))
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def create_file(self, contents, trans_id, mode_id=None):
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"""Schedule creation of a new file.
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Contents is an iterator of strings, all of which will be written
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to the target destination.
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New file takes the permissions of any existing file with that id,
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unless mode_id is specified.
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name = self._limbo_name(trans_id)
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unique_add(self._new_contents, trans_id, 'file')
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# Clean up the file, it never got registered so
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# TreeTransform.finalize() won't clean it up.
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f.writelines(contents)
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self._set_mode(trans_id, mode_id, S_ISREG)
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def _set_mode(self, trans_id, mode_id, typefunc):
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"""Set the mode of new file contents.
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The mode_id is the existing file to get the mode from (often the same
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as trans_id). The operation is only performed if there's a mode match
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according to typefunc.
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old_path = self._tree_id_paths[mode_id]
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mode = os.stat(self._tree.abspath(old_path)).st_mode
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if e.errno == errno.ENOENT:
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os.chmod(self._limbo_name(trans_id), mode)
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def create_directory(self, trans_id):
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"""Schedule creation of a new directory.
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See also new_directory.
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os.mkdir(self._limbo_name(trans_id))
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unique_add(self._new_contents, trans_id, 'directory')
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def create_symlink(self, target, trans_id):
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"""Schedule creation of a new symbolic link.
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target is a bytestring.
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See also new_symlink.
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os.symlink(target, self._limbo_name(trans_id))
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unique_add(self._new_contents, trans_id, 'symlink')
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path = FinalPaths(self).get_path(trans_id)
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raise UnableCreateSymlink(path=path)
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def cancel_creation(self, trans_id):
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"""Cancel the creation of new file contents."""
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del self._new_contents[trans_id]
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children = self._limbo_children.get(trans_id)
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# if this is a limbo directory with children, move them before removing
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if children is not None:
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self._rename_in_limbo(children)
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del self._limbo_children[trans_id]
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del self._limbo_children_names[trans_id]
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delete_any(self._limbo_name(trans_id))
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def delete_contents(self, trans_id):
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"""Schedule the contents of a path entry for deletion"""
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self.tree_kind(trans_id)
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self._removed_contents.add(trans_id)
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def cancel_deletion(self, trans_id):
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"""Cancel a scheduled deletion"""
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self._removed_contents.remove(trans_id)
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def unversion_file(self, trans_id):
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"""Schedule a path entry to become unversioned"""
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self._removed_id.add(trans_id)
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def delete_versioned(self, trans_id):
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"""Delete and unversion a versioned file"""
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self.delete_contents(trans_id)
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self.unversion_file(trans_id)
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def set_executability(self, executability, trans_id):
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"""Schedule setting of the 'execute' bit
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To unschedule, set to None
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if executability is None:
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del self._new_executability[trans_id]
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unique_add(self._new_executability, trans_id, executability)
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def set_tree_reference(self, revision_id, trans_id):
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"""Set the reference associated with a directory"""
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unique_add(self._new_reference_revision, trans_id, revision_id)
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def version_file(self, file_id, trans_id):
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"""Schedule a file to become versioned."""
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assert file_id is not None
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unique_add(self._new_id, trans_id, file_id)
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unique_add(self._r_new_id, file_id, trans_id)
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def cancel_versioning(self, trans_id):
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"""Undo a previous versioning of a file"""
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file_id = self._new_id[trans_id]
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del self._new_id[trans_id]
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del self._r_new_id[file_id]
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"""Determine the paths of all new and changed files"""
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fp = FinalPaths(self)
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for id_set in (self._new_name, self._new_parent, self._new_contents,
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self._new_id, self._new_executability):
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new_ids.update(id_set)
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new_paths = [(fp.get_path(t), t) for t in new_ids]
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def tree_kind(self, trans_id):
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"""Determine the file kind in the working tree.
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Raises NoSuchFile if the file does not exist
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path = self._tree_id_paths.get(trans_id)
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raise NoSuchFile(None)
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return file_kind(self._tree.abspath(path))
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if e.errno != errno.ENOENT:
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raise NoSuchFile(path)
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def final_kind(self, trans_id):
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"""Determine the final file kind, after any changes applied.
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Raises NoSuchFile if the file does not exist/has no contents.
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(It is conceivable that a path would be created without the
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corresponding contents insertion command)
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if trans_id in self._new_contents:
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return self._new_contents[trans_id]
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elif trans_id in self._removed_contents:
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raise NoSuchFile(None)
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return self.tree_kind(trans_id)
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def tree_file_id(self, trans_id):
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"""Determine the file id associated with the trans_id in the tree"""
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path = self._tree_id_paths[trans_id]
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# the file is a new, unversioned file, or invalid trans_id
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# the file is old; the old id is still valid
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if self._new_root == trans_id:
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return self._tree.get_root_id()
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return self._tree.inventory.path2id(path)
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def final_file_id(self, trans_id):
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"""Determine the file id after any changes are applied, or None.
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None indicates that the file will not be versioned after changes are
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# there is a new id for this file
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assert self._new_id[trans_id] is not None
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return self._new_id[trans_id]
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if trans_id in self._removed_id:
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return self.tree_file_id(trans_id)
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def inactive_file_id(self, trans_id):
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"""Return the inactive file_id associated with a transaction id.
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That is, the one in the tree or in non_present_ids.
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The file_id may actually be active, too.
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file_id = self.tree_file_id(trans_id)
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if file_id is not None:
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for key, value in self._non_present_ids.iteritems():
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if value == trans_id:
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def final_parent(self, trans_id):
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"""Determine the parent file_id, after any changes are applied.
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ROOT_PARENT is returned for the tree root.
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return self._new_parent[trans_id]
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return self.get_tree_parent(trans_id)
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def final_name(self, trans_id):
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"""Determine the final filename, after all changes are applied."""
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return self._new_name[trans_id]
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return os.path.basename(self._tree_id_paths[trans_id])
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raise NoFinalPath(trans_id, self)
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"""Return a map of parent: children for known parents.
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Only new paths and parents of tree files with assigned ids are used.
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items = list(self._new_parent.iteritems())
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items.extend((t, self.final_parent(t)) for t in
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self._tree_id_paths.keys())
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for trans_id, parent_id in items:
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if parent_id not in by_parent:
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by_parent[parent_id] = set()
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by_parent[parent_id].add(trans_id)
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def path_changed(self, trans_id):
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"""Return True if a trans_id's path has changed."""
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return (trans_id in self._new_name) or (trans_id in self._new_parent)
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def new_contents(self, trans_id):
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return (trans_id in self._new_contents)
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def find_conflicts(self):
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"""Find any violations of inventory or filesystem invariants"""
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if self.__done is True:
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raise ReusingTransform()
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# ensure all children of all existent parents are known
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# all children of non-existent parents are known, by definition.
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self._add_tree_children()
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by_parent = self.by_parent()
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conflicts.extend(self._unversioned_parents(by_parent))
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conflicts.extend(self._parent_loops())
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conflicts.extend(self._duplicate_entries(by_parent))
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conflicts.extend(self._duplicate_ids())
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conflicts.extend(self._parent_type_conflicts(by_parent))
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conflicts.extend(self._improper_versioning())
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conflicts.extend(self._executability_conflicts())
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conflicts.extend(self._overwrite_conflicts())
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def _add_tree_children(self):
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"""Add all the children of all active parents to the known paths.
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Active parents are those which gain children, and those which are
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removed. This is a necessary first step in detecting conflicts.
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parents = self.by_parent().keys()
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parents.extend([t for t in self._removed_contents if
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self.tree_kind(t) == 'directory'])
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for trans_id in self._removed_id:
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file_id = self.tree_file_id(trans_id)
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if self._tree.inventory[file_id].kind == 'directory':
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parents.append(trans_id)
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for parent_id in parents:
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# ensure that all children are registered with the transaction
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list(self.iter_tree_children(parent_id))
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def iter_tree_children(self, parent_id):
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"""Iterate through the entry's tree children, if any"""
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path = self._tree_id_paths[parent_id]
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children = os.listdir(self._tree.abspath(path))
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if e.errno != errno.ENOENT and e.errno != errno.ESRCH:
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for child in children:
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childpath = joinpath(path, child)
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if self._tree.is_control_filename(childpath):
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yield self.trans_id_tree_path(childpath)
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def has_named_child(self, by_parent, parent_id, name):
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children = by_parent[parent_id]
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for child in children:
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if self.final_name(child) == name:
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path = self._tree_id_paths[parent_id]
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childpath = joinpath(path, name)
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child_id = self._tree_path_ids.get(childpath)
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return lexists(self._tree.abspath(childpath))
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if self.final_parent(child_id) != parent_id:
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if child_id in self._removed_contents:
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# XXX What about dangling file-ids?
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def _parent_loops(self):
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"""No entry should be its own ancestor"""
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for trans_id in self._new_parent:
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while parent_id is not ROOT_PARENT:
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parent_id = self.final_parent(parent_id)
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if parent_id == trans_id:
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conflicts.append(('parent loop', trans_id))
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if parent_id in seen:
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def _unversioned_parents(self, by_parent):
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"""If parent directories are versioned, children must be versioned."""
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for parent_id, children in by_parent.iteritems():
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if parent_id is ROOT_PARENT:
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if self.final_file_id(parent_id) is not None:
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for child_id in children:
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if self.final_file_id(child_id) is not None:
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conflicts.append(('unversioned parent', parent_id))
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def _improper_versioning(self):
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"""Cannot version a file with no contents, or a bad type.
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However, existing entries with no contents are okay.
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for trans_id in self._new_id.iterkeys():
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kind = self.final_kind(trans_id)
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conflicts.append(('versioning no contents', trans_id))
756
if not InventoryEntry.versionable_kind(kind):
757
conflicts.append(('versioning bad kind', trans_id, kind))
760
def _executability_conflicts(self):
761
"""Check for bad executability changes.
763
Only versioned files may have their executability set, because
764
1. only versioned entries can have executability under windows
765
2. only files can be executable. (The execute bit on a directory
766
does not indicate searchability)
769
for trans_id in self._new_executability:
770
if self.final_file_id(trans_id) is None:
771
conflicts.append(('unversioned executability', trans_id))
774
non_file = self.final_kind(trans_id) != "file"
778
conflicts.append(('non-file executability', trans_id))
781
def _overwrite_conflicts(self):
782
"""Check for overwrites (not permitted on Win32)"""
784
for trans_id in self._new_contents:
786
self.tree_kind(trans_id)
789
if trans_id not in self._removed_contents:
790
conflicts.append(('overwrite', trans_id,
791
self.final_name(trans_id)))
794
def _duplicate_entries(self, by_parent):
795
"""No directory may have two entries with the same name."""
797
if (self._new_name, self._new_parent) == ({}, {}):
799
for children in by_parent.itervalues():
800
name_ids = [(self.final_name(t), t) for t in children]
801
if not self._tree.case_sensitive:
802
name_ids = [(n.lower(), t) for n, t in name_ids]
806
for name, trans_id in name_ids:
808
kind = self.final_kind(trans_id)
811
file_id = self.final_file_id(trans_id)
812
if kind is None and file_id is None:
814
if name == last_name:
815
conflicts.append(('duplicate', last_trans_id, trans_id,
818
last_trans_id = trans_id
821
def _duplicate_ids(self):
822
"""Each inventory id may only be used once"""
824
removed_tree_ids = set((self.tree_file_id(trans_id) for trans_id in
826
active_tree_ids = set((f for f in self._tree.inventory if
827
f not in removed_tree_ids))
828
for trans_id, file_id in self._new_id.iteritems():
829
if file_id in active_tree_ids:
830
old_trans_id = self.trans_id_tree_file_id(file_id)
831
conflicts.append(('duplicate id', old_trans_id, trans_id))
834
def _parent_type_conflicts(self, by_parent):
835
"""parents must have directory 'contents'."""
837
for parent_id, children in by_parent.iteritems():
838
if parent_id is ROOT_PARENT:
840
if not self._any_contents(children):
842
for child in children:
844
self.final_kind(child)
848
kind = self.final_kind(parent_id)
852
conflicts.append(('missing parent', parent_id))
853
elif kind != "directory":
854
conflicts.append(('non-directory parent', parent_id))
857
def _any_contents(self, trans_ids):
858
"""Return true if any of the trans_ids, will have contents."""
859
for trans_id in trans_ids:
861
kind = self.final_kind(trans_id)
867
def apply(self, no_conflicts=False, _mover=None):
868
"""Apply all changes to the inventory and filesystem.
870
If filesystem or inventory conflicts are present, MalformedTransform
873
If apply succeeds, finalize is not necessary.
875
:param no_conflicts: if True, the caller guarantees there are no
876
conflicts, so no check is made.
877
:param _mover: Supply an alternate FileMover, for testing
880
conflicts = self.find_conflicts()
881
if len(conflicts) != 0:
882
raise MalformedTransform(conflicts=conflicts)
883
inv = self._tree.inventory
885
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
892
child_pb.update('Apply phase', 0, 2)
893
self._apply_removals(inv, inventory_delta, mover)
894
child_pb.update('Apply phase', 1, 2)
895
modified_paths = self._apply_insertions(inv, inventory_delta,
901
mover.apply_deletions()
904
self._tree.apply_inventory_delta(inventory_delta)
907
return _TransformResults(modified_paths, self.rename_count)
909
def _limbo_name(self, trans_id):
910
"""Generate the limbo name of a file"""
911
limbo_name = self._limbo_files.get(trans_id)
912
if limbo_name is not None:
914
parent = self._new_parent.get(trans_id)
915
# if the parent directory is already in limbo (e.g. when building a
916
# tree), choose a limbo name inside the parent, to reduce further
918
use_direct_path = False
919
if self._new_contents.get(parent) == 'directory':
920
filename = self._new_name.get(trans_id)
921
if filename is not None:
922
if parent not in self._limbo_children:
923
self._limbo_children[parent] = set()
924
self._limbo_children_names[parent] = {}
925
use_direct_path = True
926
# the direct path can only be used if no other file has
927
# already taken this pathname, i.e. if the name is unused, or
928
# if it is already associated with this trans_id.
929
elif self._tree.case_sensitive:
930
if (self._limbo_children_names[parent].get(filename)
931
in (trans_id, None)):
932
use_direct_path = True
934
for l_filename, l_trans_id in\
935
self._limbo_children_names[parent].iteritems():
936
if l_trans_id == trans_id:
938
if l_filename.lower() == filename.lower():
941
use_direct_path = True
944
limbo_name = pathjoin(self._limbo_files[parent], filename)
945
self._limbo_children[parent].add(trans_id)
946
self._limbo_children_names[parent][filename] = trans_id
948
limbo_name = pathjoin(self._limbodir, trans_id)
949
self._needs_rename.add(trans_id)
950
self._limbo_files[trans_id] = limbo_name
953
def _apply_removals(self, inv, inventory_delta, mover):
954
"""Perform tree operations that remove directory/inventory names.
956
That is, delete files that are to be deleted, and put any files that
957
need renaming into limbo. This must be done in strict child-to-parent
960
tree_paths = list(self._tree_path_ids.iteritems())
961
tree_paths.sort(reverse=True)
962
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
964
for num, data in enumerate(tree_paths):
965
path, trans_id = data
966
child_pb.update('removing file', num, len(tree_paths))
967
full_path = self._tree.abspath(path)
968
if trans_id in self._removed_contents:
969
mover.pre_delete(full_path, os.path.join(self._deletiondir,
971
elif trans_id in self._new_name or trans_id in \
974
mover.rename(full_path, self._limbo_name(trans_id))
976
if e.errno != errno.ENOENT:
979
self.rename_count += 1
980
if trans_id in self._removed_id:
981
if trans_id == self._new_root:
982
file_id = self._tree.get_root_id()
984
file_id = self.tree_file_id(trans_id)
985
assert file_id is not None
986
inventory_delta.append((path, None, file_id, None))
990
def _apply_insertions(self, inv, inventory_delta, mover):
991
"""Perform tree operations that insert directory/inventory names.
993
That is, create any files that need to be created, and restore from
994
limbo any files that needed renaming. This must be done in strict
995
parent-to-child order.
997
new_paths = self.new_paths()
999
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1002
for num, (path, trans_id) in enumerate(new_paths):
1004
child_pb.update('adding file', num, len(new_paths))
1006
kind = self._new_contents[trans_id]
1008
kind = contents = None
1009
if trans_id in self._new_contents or \
1010
self.path_changed(trans_id):
1011
full_path = self._tree.abspath(path)
1012
if trans_id in self._needs_rename:
1014
mover.rename(self._limbo_name(trans_id), full_path)
1016
# We may be renaming a dangling inventory id
1017
if e.errno != errno.ENOENT:
1020
self.rename_count += 1
1021
if trans_id in self._new_contents:
1022
modified_paths.append(full_path)
1023
completed_new.append(trans_id)
1025
if trans_id in self._new_id:
1027
kind = file_kind(self._tree.abspath(path))
1028
if trans_id in self._new_reference_revision:
1029
new_entry = inventory.TreeReference(
1030
self._new_id[trans_id],
1031
self._new_name[trans_id],
1032
self.final_file_id(self._new_parent[trans_id]),
1033
None, self._new_reference_revision[trans_id])
1035
new_entry = inventory.make_entry(kind,
1036
self.final_name(trans_id),
1037
self.final_file_id(self.final_parent(trans_id)),
1038
self._new_id[trans_id])
1040
if trans_id in self._new_name or trans_id in\
1041
self._new_parent or\
1042
trans_id in self._new_executability:
1043
file_id = self.final_file_id(trans_id)
1044
if file_id is not None:
1045
entry = inv[file_id]
1046
new_entry = entry.copy()
1048
if trans_id in self._new_name or trans_id in\
1050
if new_entry is not None:
1051
new_entry.name = self.final_name(trans_id)
1052
parent = self.final_parent(trans_id)
1053
parent_id = self.final_file_id(parent)
1054
new_entry.parent_id = parent_id
1056
if trans_id in self._new_executability:
1057
self._set_executability(path, new_entry, trans_id)
1058
if new_entry is not None:
1059
if new_entry.file_id in inv:
1060
old_path = inv.id2path(new_entry.file_id)
1063
inventory_delta.append((old_path, path,
1068
for trans_id in completed_new:
1069
del self._new_contents[trans_id]
1070
return modified_paths
1072
def _set_executability(self, path, entry, trans_id):
1073
"""Set the executability of versioned files """
1074
new_executability = self._new_executability[trans_id]
1075
entry.executable = new_executability
1076
if supports_executable():
1077
abspath = self._tree.abspath(path)
1078
current_mode = os.stat(abspath).st_mode
1079
if new_executability:
1082
to_mode = current_mode | (0100 & ~umask)
1083
# Enable x-bit for others only if they can read it.
1084
if current_mode & 0004:
1085
to_mode |= 0001 & ~umask
1086
if current_mode & 0040:
1087
to_mode |= 0010 & ~umask
1089
to_mode = current_mode & ~0111
1090
os.chmod(abspath, to_mode)
1092
def _new_entry(self, name, parent_id, file_id):
1093
"""Helper function to create a new filesystem entry."""
1094
trans_id = self.create_path(name, parent_id)
1095
if file_id is not None:
1096
self.version_file(file_id, trans_id)
1099
def new_file(self, name, parent_id, contents, file_id=None,
1101
"""Convenience method to create files.
1103
name is the name of the file to create.
1104
parent_id is the transaction id of the parent directory of the file.
1105
contents is an iterator of bytestrings, which will be used to produce
1107
:param file_id: The inventory ID of the file, if it is to be versioned.
1108
:param executable: Only valid when a file_id has been supplied.
1110
trans_id = self._new_entry(name, parent_id, file_id)
1111
# TODO: rather than scheduling a set_executable call,
1112
# have create_file create the file with the right mode.
1113
self.create_file(contents, trans_id)
1114
if executable is not None:
1115
self.set_executability(executable, trans_id)
1118
def new_directory(self, name, parent_id, file_id=None):
1119
"""Convenience method to create directories.
1121
name is the name of the directory to create.
1122
parent_id is the transaction id of the parent directory of the
1124
file_id is the inventory ID of the directory, if it is to be versioned.
1126
trans_id = self._new_entry(name, parent_id, file_id)
1127
self.create_directory(trans_id)
1130
def new_symlink(self, name, parent_id, target, file_id=None):
1131
"""Convenience method to create symbolic link.
1133
name is the name of the symlink to create.
1134
parent_id is the transaction id of the parent directory of the symlink.
1135
target is a bytestring of the target of the symlink.
1136
file_id is the inventory ID of the file, if it is to be versioned.
1138
trans_id = self._new_entry(name, parent_id, file_id)
1139
self.create_symlink(target, trans_id)
1142
def _affected_ids(self):
1143
"""Return the set of transform ids affected by the transform"""
1144
trans_ids = set(self._removed_id)
1145
trans_ids.update(self._new_id.keys())
1146
trans_ids.update(self._removed_contents)
1147
trans_ids.update(self._new_contents.keys())
1148
trans_ids.update(self._new_executability.keys())
1149
trans_ids.update(self._new_name.keys())
1150
trans_ids.update(self._new_parent.keys())
1153
def _get_file_id_maps(self):
1154
"""Return mapping of file_ids to trans_ids in the to and from states"""
1155
trans_ids = self._affected_ids()
1158
# Build up two dicts: trans_ids associated with file ids in the
1159
# FROM state, vs the TO state.
1160
for trans_id in trans_ids:
1161
from_file_id = self.tree_file_id(trans_id)
1162
if from_file_id is not None:
1163
from_trans_ids[from_file_id] = trans_id
1164
to_file_id = self.final_file_id(trans_id)
1165
if to_file_id is not None:
1166
to_trans_ids[to_file_id] = trans_id
1167
return from_trans_ids, to_trans_ids
1169
def _from_file_data(self, from_trans_id, from_versioned, file_id):
1170
"""Get data about a file in the from (tree) state
1172
Return a (name, parent, kind, executable) tuple
1174
from_path = self._tree_id_paths.get(from_trans_id)
1176
# get data from working tree if versioned
1177
from_entry = self._tree.inventory[file_id]
1178
from_name = from_entry.name
1179
from_parent = from_entry.parent_id
1182
if from_path is None:
1183
# File does not exist in FROM state
1187
# File exists, but is not versioned. Have to use path-
1189
from_name = os.path.basename(from_path)
1190
tree_parent = self.get_tree_parent(from_trans_id)
1191
from_parent = self.tree_file_id(tree_parent)
1192
if from_path is not None:
1193
from_kind, from_executable, from_stats = \
1194
self._tree._comparison_data(from_entry, from_path)
1197
from_executable = False
1198
return from_name, from_parent, from_kind, from_executable
1200
def _to_file_data(self, to_trans_id, from_trans_id, from_executable):
1201
"""Get data about a file in the to (target) state
1203
Return a (name, parent, kind, executable) tuple
1205
to_name = self.final_name(to_trans_id)
1207
to_kind = self.final_kind(to_trans_id)
1210
to_parent = self.final_file_id(self.final_parent(to_trans_id))
1211
if to_trans_id in self._new_executability:
1212
to_executable = self._new_executability[to_trans_id]
1213
elif to_trans_id == from_trans_id:
1214
to_executable = from_executable
1216
to_executable = False
1217
return to_name, to_parent, to_kind, to_executable
1219
def _iter_changes(self):
1220
"""Produce output in the same format as Tree._iter_changes.
1222
Will produce nonsensical results if invoked while inventory/filesystem
1223
conflicts (as reported by TreeTransform.find_conflicts()) are present.
1225
This reads the Transform, but only reproduces changes involving a
1226
file_id. Files that are not versioned in either of the FROM or TO
1227
states are not reflected.
1229
final_paths = FinalPaths(self)
1230
from_trans_ids, to_trans_ids = self._get_file_id_maps()
1232
# Now iterate through all active file_ids
1233
for file_id in set(from_trans_ids.keys() + to_trans_ids.keys()):
1235
from_trans_id = from_trans_ids.get(file_id)
1236
# find file ids, and determine versioning state
1237
if from_trans_id is None:
1238
from_versioned = False
1239
from_trans_id = to_trans_ids[file_id]
1241
from_versioned = True
1242
to_trans_id = to_trans_ids.get(file_id)
1243
if to_trans_id is None:
1244
to_versioned = False
1245
to_trans_id = from_trans_id
1249
from_name, from_parent, from_kind, from_executable = \
1250
self._from_file_data(from_trans_id, from_versioned, file_id)
1252
to_name, to_parent, to_kind, to_executable = \
1253
self._to_file_data(to_trans_id, from_trans_id, from_executable)
1255
if not from_versioned:
1258
from_path = self._tree_id_paths.get(from_trans_id)
1259
if not to_versioned:
1262
to_path = final_paths.get_path(to_trans_id)
1263
if from_kind != to_kind:
1265
elif to_kind in ('file', 'symlink') and (
1266
to_trans_id != from_trans_id or
1267
to_trans_id in self._new_contents):
1269
if (not modified and from_versioned == to_versioned and
1270
from_parent==to_parent and from_name == to_name and
1271
from_executable == to_executable):
1273
results.append((file_id, (from_path, to_path), modified,
1274
(from_versioned, to_versioned),
1275
(from_parent, to_parent),
1276
(from_name, to_name),
1277
(from_kind, to_kind),
1278
(from_executable, to_executable)))
1279
return iter(sorted(results, key=lambda x:x[1]))
1282
def joinpath(parent, child):
1283
"""Join tree-relative paths, handling the tree root specially"""
1284
if parent is None or parent == "":
1287
return pathjoin(parent, child)
1290
class FinalPaths(object):
1291
"""Make path calculation cheap by memoizing paths.
1293
The underlying tree must not be manipulated between calls, or else
1294
the results will likely be incorrect.
1296
def __init__(self, transform):
1297
object.__init__(self)
1298
self._known_paths = {}
1299
self.transform = transform
1301
def _determine_path(self, trans_id):
1302
if trans_id == self.transform.root:
1304
name = self.transform.final_name(trans_id)
1305
parent_id = self.transform.final_parent(trans_id)
1306
if parent_id == self.transform.root:
1309
return pathjoin(self.get_path(parent_id), name)
1311
def get_path(self, trans_id):
1312
"""Find the final path associated with a trans_id"""
1313
if trans_id not in self._known_paths:
1314
self._known_paths[trans_id] = self._determine_path(trans_id)
1315
return self._known_paths[trans_id]
1318
def topology_sorted_ids(tree):
1319
"""Determine the topological order of the ids in a tree"""
1320
file_ids = list(tree)
1321
file_ids.sort(key=tree.id2path)
1325
def build_tree(tree, wt, accelerator_tree=None):
1326
"""Create working tree for a branch, using a TreeTransform.
1328
This function should be used on empty trees, having a tree root at most.
1329
(see merge and revert functionality for working with existing trees)
1331
Existing files are handled like so:
1333
- Existing bzrdirs take precedence over creating new items. They are
1334
created as '%s.diverted' % name.
1335
- Otherwise, if the content on disk matches the content we are building,
1336
it is silently replaced.
1337
- Otherwise, conflict resolution will move the old file to 'oldname.moved'.
1339
:param tree: The tree to convert wt into a copy of
1340
:param wt: The working tree that files will be placed into
1341
:param accelerator_tree: A tree which can be used for retrieving file
1342
contents more quickly than tree itself, i.e. a workingtree. tree
1343
will be used for cases where accelerator_tree's content is different.
1345
wt.lock_tree_write()
1349
if accelerator_tree is not None:
1350
accelerator_tree.lock_read()
1352
return _build_tree(tree, wt, accelerator_tree)
1354
if accelerator_tree is not None:
1355
accelerator_tree.unlock()
1362
def _build_tree(tree, wt, accelerator_tree):
1363
"""See build_tree."""
1364
if len(wt.inventory) > 1: # more than just a root
1365
raise errors.WorkingTreeAlreadyPopulated(base=wt.basedir)
1367
top_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1368
pp = ProgressPhase("Build phase", 2, top_pb)
1369
if tree.inventory.root is not None:
1370
# This is kind of a hack: we should be altering the root
1371
# as part of the regular tree shape diff logic.
1372
# The conditional test here is to avoid doing an
1373
# expensive operation (flush) every time the root id
1374
# is set within the tree, nor setting the root and thus
1375
# marking the tree as dirty, because we use two different
1376
# idioms here: tree interfaces and inventory interfaces.
1377
if wt.get_root_id() != tree.get_root_id():
1378
wt.set_root_id(tree.get_root_id())
1380
tt = TreeTransform(wt)
1384
file_trans_id[wt.get_root_id()] = \
1385
tt.trans_id_tree_file_id(wt.get_root_id())
1386
pb = bzrlib.ui.ui_factory.nested_progress_bar()
1388
deferred_contents = []
1389
for num, (tree_path, entry) in \
1390
enumerate(tree.inventory.iter_entries_by_dir()):
1391
pb.update("Building tree", num - len(deferred_contents),
1392
len(tree.inventory))
1393
if entry.parent_id is None:
1396
file_id = entry.file_id
1397
target_path = wt.abspath(tree_path)
1399
kind = file_kind(target_path)
1403
if kind == "directory":
1405
bzrdir.BzrDir.open(target_path)
1406
except errors.NotBranchError:
1410
if (file_id not in divert and
1411
_content_match(tree, entry, file_id, kind,
1413
tt.delete_contents(tt.trans_id_tree_path(tree_path))
1414
if kind == 'directory':
1416
if entry.parent_id not in file_trans_id:
1417
raise AssertionError(
1418
'entry %s parent id %r is not in file_trans_id %r'
1419
% (entry, entry.parent_id, file_trans_id))
1420
parent_id = file_trans_id[entry.parent_id]
1421
if entry.kind == 'file':
1422
# We *almost* replicate new_by_entry, so that we can defer
1423
# getting the file text, and get them all at once.
1424
trans_id = tt.create_path(entry.name, parent_id)
1425
file_trans_id[file_id] = trans_id
1426
tt.version_file(entry.file_id, trans_id)
1427
executable = tree.is_executable(entry.file_id, tree_path)
1428
if executable is not None:
1429
tt.set_executability(executable, trans_id)
1430
deferred_contents.append((entry.file_id, trans_id))
1432
file_trans_id[file_id] = new_by_entry(tt, entry, parent_id,
1435
new_trans_id = file_trans_id[file_id]
1436
old_parent = tt.trans_id_tree_path(tree_path)
1437
_reparent_children(tt, old_parent, new_trans_id)
1438
for num, (trans_id, bytes) in enumerate(
1439
_iter_files_bytes_accelerated(tree, accelerator_tree,
1440
deferred_contents)):
1441
tt.create_file(bytes, trans_id)
1442
pb.update('Adding file contents',
1443
(num + len(tree.inventory) - len(deferred_contents)),
1444
len(tree.inventory))
1448
divert_trans = set(file_trans_id[f] for f in divert)
1449
resolver = lambda t, c: resolve_checkout(t, c, divert_trans)
1450
raw_conflicts = resolve_conflicts(tt, pass_func=resolver)
1451
conflicts = cook_conflicts(raw_conflicts, tt)
1452
for conflict in conflicts:
1455
wt.add_conflicts(conflicts)
1456
except errors.UnsupportedOperation:
1458
result = tt.apply(no_conflicts=True)
1465
def _iter_files_bytes_accelerated(tree, accelerator_tree, desired_files):
1466
if accelerator_tree is None:
1467
new_desired_files = desired_files
1469
iter = accelerator_tree._iter_changes(tree, include_unchanged=True)
1470
unchanged = dict((f, p[1]) for (f, p, c, v, d, n, k, e)
1472
new_desired_files = []
1473
for file_id, identifier in desired_files:
1474
accelerator_path = unchanged.get(file_id)
1475
if accelerator_path is None:
1476
new_desired_files.append((file_id, identifier))
1478
contents = accelerator_tree.get_file(file_id, accelerator_path)
1481
contents_bytes = (contents.read(),)
1484
yield identifier, contents_bytes
1485
for result in tree.iter_files_bytes(new_desired_files):
1489
def _reparent_children(tt, old_parent, new_parent):
1490
for child in tt.iter_tree_children(old_parent):
1491
tt.adjust_path(tt.final_name(child), new_parent, child)
1494
def _content_match(tree, entry, file_id, kind, target_path):
1495
if entry.kind != kind:
1497
if entry.kind == "directory":
1499
if entry.kind == "file":
1500
if tree.get_file(file_id).read() == file(target_path, 'rb').read():
1502
elif entry.kind == "symlink":
1503
if tree.get_symlink_target(file_id) == os.readlink(target_path):
1508
def resolve_checkout(tt, conflicts, divert):
1509
new_conflicts = set()
1510
for c_type, conflict in ((c[0], c) for c in conflicts):
1511
# Anything but a 'duplicate' would indicate programmer error
1512
assert c_type == 'duplicate', c_type
1513
# Now figure out which is new and which is old
1514
if tt.new_contents(conflict[1]):
1515
new_file = conflict[1]
1516
old_file = conflict[2]
1518
new_file = conflict[2]
1519
old_file = conflict[1]
1521
# We should only get here if the conflict wasn't completely
1523
final_parent = tt.final_parent(old_file)
1524
if new_file in divert:
1525
new_name = tt.final_name(old_file)+'.diverted'
1526
tt.adjust_path(new_name, final_parent, new_file)
1527
new_conflicts.add((c_type, 'Diverted to',
1528
new_file, old_file))
1530
new_name = tt.final_name(old_file)+'.moved'
1531
tt.adjust_path(new_name, final_parent, old_file)
1532
new_conflicts.add((c_type, 'Moved existing file to',
1533
old_file, new_file))
1534
return new_conflicts
1537
def new_by_entry(tt, entry, parent_id, tree):
1538
"""Create a new file according to its inventory entry"""
1542
contents = tree.get_file(entry.file_id).readlines()
1543
executable = tree.is_executable(entry.file_id)
1544
return tt.new_file(name, parent_id, contents, entry.file_id,
1546
elif kind in ('directory', 'tree-reference'):
1547
trans_id = tt.new_directory(name, parent_id, entry.file_id)
1548
if kind == 'tree-reference':
1549
tt.set_tree_reference(entry.reference_revision, trans_id)
1551
elif kind == 'symlink':
1552
target = tree.get_symlink_target(entry.file_id)
1553
return tt.new_symlink(name, parent_id, target, entry.file_id)
1555
raise errors.BadFileKindError(name, kind)
1558
def create_by_entry(tt, entry, tree, trans_id, lines=None, mode_id=None):
1559
"""Create new file contents according to an inventory entry."""
1560
if entry.kind == "file":
1562
lines = tree.get_file(entry.file_id).readlines()
1563
tt.create_file(lines, trans_id, mode_id=mode_id)
1564
elif entry.kind == "symlink":
1565
tt.create_symlink(tree.get_symlink_target(entry.file_id), trans_id)
1566
elif entry.kind == "directory":
1567
tt.create_directory(trans_id)
1570
def create_entry_executability(tt, entry, trans_id):
1571
"""Set the executability of a trans_id according to an inventory entry"""
1572
if entry.kind == "file":
1573
tt.set_executability(entry.executable, trans_id)
1576
@deprecated_function(zero_fifteen)
1577
def find_interesting(working_tree, target_tree, filenames):
1578
"""Find the ids corresponding to specified filenames.
1580
Deprecated: Please use tree1.paths2ids(filenames, [tree2]).
1582
working_tree.lock_read()
1584
target_tree.lock_read()
1586
return working_tree.paths2ids(filenames, [target_tree])
1588
target_tree.unlock()
1590
working_tree.unlock()
1593
@deprecated_function(zero_ninety)
1594
def change_entry(tt, file_id, working_tree, target_tree,
1595
trans_id_file_id, backups, trans_id, by_parent):
1596
"""Replace a file_id's contents with those from a target tree."""
1597
if file_id is None and target_tree is None:
1598
# skip the logic altogether in the deprecation test
1600
e_trans_id = trans_id_file_id(file_id)
1601
entry = target_tree.inventory[file_id]
1602
has_contents, contents_mod, meta_mod, = _entry_changes(file_id, entry,
1605
mode_id = e_trans_id
1608
tt.delete_contents(e_trans_id)
1610
parent_trans_id = trans_id_file_id(entry.parent_id)
1611
backup_name = get_backup_name(entry, by_parent,
1612
parent_trans_id, tt)
1613
tt.adjust_path(backup_name, parent_trans_id, e_trans_id)
1614
tt.unversion_file(e_trans_id)
1615
e_trans_id = tt.create_path(entry.name, parent_trans_id)
1616
tt.version_file(file_id, e_trans_id)
1617
trans_id[file_id] = e_trans_id
1618
create_by_entry(tt, entry, target_tree, e_trans_id, mode_id=mode_id)
1619
create_entry_executability(tt, entry, e_trans_id)
1622
tt.set_executability(entry.executable, e_trans_id)
1623
if tt.final_name(e_trans_id) != entry.name:
1626
parent_id = tt.final_parent(e_trans_id)
1627
parent_file_id = tt.final_file_id(parent_id)
1628
if parent_file_id != entry.parent_id:
1633
parent_trans_id = trans_id_file_id(entry.parent_id)
1634
tt.adjust_path(entry.name, parent_trans_id, e_trans_id)
1637
def get_backup_name(entry, by_parent, parent_trans_id, tt):
1638
return _get_backup_name(entry.name, by_parent, parent_trans_id, tt)
1641
def _get_backup_name(name, by_parent, parent_trans_id, tt):
1642
"""Produce a backup-style name that appears to be available"""
1646
yield "%s.~%d~" % (name, counter)
1648
for new_name in name_gen():
1649
if not tt.has_named_child(by_parent, parent_trans_id, new_name):
1653
def _entry_changes(file_id, entry, working_tree):
1654
"""Determine in which ways the inventory entry has changed.
1656
Returns booleans: has_contents, content_mod, meta_mod
1657
has_contents means there are currently contents, but they differ
1658
contents_mod means contents need to be modified
1659
meta_mod means the metadata needs to be modified
1661
cur_entry = working_tree.inventory[file_id]
1663
working_kind = working_tree.kind(file_id)
1666
has_contents = False
1669
if has_contents is True:
1670
if entry.kind != working_kind:
1671
contents_mod, meta_mod = True, False
1673
cur_entry._read_tree_state(working_tree.id2path(file_id),
1675
contents_mod, meta_mod = entry.detect_changes(cur_entry)
1676
cur_entry._forget_tree_state()
1677
return has_contents, contents_mod, meta_mod
1680
def revert(working_tree, target_tree, filenames, backups=False,
1681
pb=DummyProgress(), change_reporter=None):
1682
"""Revert a working tree's contents to those of a target tree."""
1683
target_tree.lock_read()
1684
tt = TreeTransform(working_tree, pb)
1686
pp = ProgressPhase("Revert phase", 3, pb)
1688
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1690
merge_modified = _alter_files(working_tree, target_tree, tt,
1691
child_pb, filenames, backups)
1695
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1697
raw_conflicts = resolve_conflicts(tt, child_pb,
1698
lambda t, c: conflict_pass(t, c, target_tree))
1701
conflicts = cook_conflicts(raw_conflicts, tt)
1703
change_reporter = delta._ChangeReporter(
1704
unversioned_filter=working_tree.is_ignored)
1705
delta.report_changes(tt._iter_changes(), change_reporter)
1706
for conflict in conflicts:
1710
working_tree.set_merge_modified(merge_modified)
1712
target_tree.unlock()
1718
def _alter_files(working_tree, target_tree, tt, pb, specific_files,
1720
merge_modified = working_tree.merge_modified()
1721
change_list = target_tree._iter_changes(working_tree,
1722
specific_files=specific_files, pb=pb)
1723
if target_tree.inventory.root is None:
1730
for id_num, (file_id, path, changed_content, versioned, parent, name,
1731
kind, executable) in enumerate(change_list):
1732
if skip_root and file_id[0] is not None and parent[0] is None:
1734
trans_id = tt.trans_id_file_id(file_id)
1737
keep_content = False
1738
if kind[0] == 'file' and (backups or kind[1] is None):
1739
wt_sha1 = working_tree.get_file_sha1(file_id)
1740
if merge_modified.get(file_id) != wt_sha1:
1741
# acquire the basis tree lazily to prevent the
1742
# expense of accessing it when it's not needed ?
1743
# (Guessing, RBC, 200702)
1744
if basis_tree is None:
1745
basis_tree = working_tree.basis_tree()
1746
basis_tree.lock_read()
1747
if file_id in basis_tree:
1748
if wt_sha1 != basis_tree.get_file_sha1(file_id):
1750
elif kind[1] is None and not versioned[1]:
1752
if kind[0] is not None:
1753
if not keep_content:
1754
tt.delete_contents(trans_id)
1755
elif kind[1] is not None:
1756
parent_trans_id = tt.trans_id_file_id(parent[0])
1757
by_parent = tt.by_parent()
1758
backup_name = _get_backup_name(name[0], by_parent,
1759
parent_trans_id, tt)
1760
tt.adjust_path(backup_name, parent_trans_id, trans_id)
1761
new_trans_id = tt.create_path(name[0], parent_trans_id)
1762
if versioned == (True, True):
1763
tt.unversion_file(trans_id)
1764
tt.version_file(file_id, new_trans_id)
1765
# New contents should have the same unix perms as old
1768
trans_id = new_trans_id
1769
if kind[1] == 'directory':
1770
tt.create_directory(trans_id)
1771
elif kind[1] == 'symlink':
1772
tt.create_symlink(target_tree.get_symlink_target(file_id),
1774
elif kind[1] == 'file':
1775
deferred_files.append((file_id, (trans_id, mode_id)))
1776
if basis_tree is None:
1777
basis_tree = working_tree.basis_tree()
1778
basis_tree.lock_read()
1779
new_sha1 = target_tree.get_file_sha1(file_id)
1780
if (file_id in basis_tree and new_sha1 ==
1781
basis_tree.get_file_sha1(file_id)):
1782
if file_id in merge_modified:
1783
del merge_modified[file_id]
1785
merge_modified[file_id] = new_sha1
1787
# preserve the execute bit when backing up
1788
if keep_content and executable[0] == executable[1]:
1789
tt.set_executability(executable[1], trans_id)
1791
assert kind[1] is None
1792
if versioned == (False, True):
1793
tt.version_file(file_id, trans_id)
1794
if versioned == (True, False):
1795
tt.unversion_file(trans_id)
1796
if (name[1] is not None and
1797
(name[0] != name[1] or parent[0] != parent[1])):
1799
name[1], tt.trans_id_file_id(parent[1]), trans_id)
1800
if executable[0] != executable[1] and kind[1] == "file":
1801
tt.set_executability(executable[1], trans_id)
1802
for (trans_id, mode_id), bytes in target_tree.iter_files_bytes(
1804
tt.create_file(bytes, trans_id, mode_id)
1806
if basis_tree is not None:
1808
return merge_modified
1811
def resolve_conflicts(tt, pb=DummyProgress(), pass_func=None):
1812
"""Make many conflict-resolution attempts, but die if they fail"""
1813
if pass_func is None:
1814
pass_func = conflict_pass
1815
new_conflicts = set()
1818
pb.update('Resolution pass', n+1, 10)
1819
conflicts = tt.find_conflicts()
1820
if len(conflicts) == 0:
1821
return new_conflicts
1822
new_conflicts.update(pass_func(tt, conflicts))
1823
raise MalformedTransform(conflicts=conflicts)
1828
def conflict_pass(tt, conflicts, path_tree=None):
1829
"""Resolve some classes of conflicts.
1831
:param tt: The transform to resolve conflicts in
1832
:param conflicts: The conflicts to resolve
1833
:param path_tree: A Tree to get supplemental paths from
1835
new_conflicts = set()
1836
for c_type, conflict in ((c[0], c) for c in conflicts):
1837
if c_type == 'duplicate id':
1838
tt.unversion_file(conflict[1])
1839
new_conflicts.add((c_type, 'Unversioned existing file',
1840
conflict[1], conflict[2], ))
1841
elif c_type == 'duplicate':
1842
# files that were renamed take precedence
1843
final_parent = tt.final_parent(conflict[1])
1844
if tt.path_changed(conflict[1]):
1845
existing_file, new_file = conflict[2], conflict[1]
1847
existing_file, new_file = conflict[1], conflict[2]
1848
new_name = tt.final_name(existing_file)+'.moved'
1849
tt.adjust_path(new_name, final_parent, existing_file)
1850
new_conflicts.add((c_type, 'Moved existing file to',
1851
existing_file, new_file))
1852
elif c_type == 'parent loop':
1853
# break the loop by undoing one of the ops that caused the loop
1855
while not tt.path_changed(cur):
1856
cur = tt.final_parent(cur)
1857
new_conflicts.add((c_type, 'Cancelled move', cur,
1858
tt.final_parent(cur),))
1859
tt.adjust_path(tt.final_name(cur), tt.get_tree_parent(cur), cur)
1861
elif c_type == 'missing parent':
1862
trans_id = conflict[1]
1864
tt.cancel_deletion(trans_id)
1865
new_conflicts.add(('deleting parent', 'Not deleting',
1868
tt.create_directory(trans_id)
1869
new_conflicts.add((c_type, 'Created directory', trans_id))
1871
tt.final_name(trans_id)
1873
if path_tree is not None:
1874
file_id = tt.final_file_id(trans_id)
1875
entry = path_tree.inventory[file_id]
1876
parent_trans_id = tt.trans_id_file_id(entry.parent_id)
1877
tt.adjust_path(entry.name, parent_trans_id, trans_id)
1878
elif c_type == 'unversioned parent':
1879
tt.version_file(tt.inactive_file_id(conflict[1]), conflict[1])
1880
new_conflicts.add((c_type, 'Versioned directory', conflict[1]))
1881
return new_conflicts
1884
def cook_conflicts(raw_conflicts, tt):
1885
"""Generate a list of cooked conflicts, sorted by file path"""
1886
from bzrlib.conflicts import Conflict
1887
conflict_iter = iter_cook_conflicts(raw_conflicts, tt)
1888
return sorted(conflict_iter, key=Conflict.sort_key)
1891
def iter_cook_conflicts(raw_conflicts, tt):
1892
from bzrlib.conflicts import Conflict
1894
for conflict in raw_conflicts:
1895
c_type = conflict[0]
1896
action = conflict[1]
1897
modified_path = fp.get_path(conflict[2])
1898
modified_id = tt.final_file_id(conflict[2])
1899
if len(conflict) == 3:
1900
yield Conflict.factory(c_type, action=action, path=modified_path,
1901
file_id=modified_id)
1904
conflicting_path = fp.get_path(conflict[3])
1905
conflicting_id = tt.final_file_id(conflict[3])
1906
yield Conflict.factory(c_type, action=action, path=modified_path,
1907
file_id=modified_id,
1908
conflict_path=conflicting_path,
1909
conflict_file_id=conflicting_id)
1912
class _FileMover(object):
1913
"""Moves and deletes files for TreeTransform, tracking operations"""
1916
self.past_renames = []
1917
self.pending_deletions = []
1919
def rename(self, from_, to):
1920
"""Rename a file from one path to another. Functions like os.rename"""
1922
os.rename(from_, to)
1924
if e.errno in (errno.EEXIST, errno.ENOTEMPTY):
1925
raise errors.FileExists(to, str(e))
1927
self.past_renames.append((from_, to))
1929
def pre_delete(self, from_, to):
1930
"""Rename a file out of the way and mark it for deletion.
1932
Unlike os.unlink, this works equally well for files and directories.
1933
:param from_: The current file path
1934
:param to: A temporary path for the file
1936
self.rename(from_, to)
1937
self.pending_deletions.append(to)
1940
"""Reverse all renames that have been performed"""
1941
for from_, to in reversed(self.past_renames):
1942
os.rename(to, from_)
1943
# after rollback, don't reuse _FileMover
1945
pending_deletions = None
1947
def apply_deletions(self):
1948
"""Apply all marked deletions"""
1949
for path in self.pending_deletions:
1951
# after apply_deletions, don't reuse _FileMover
1953
pending_deletions = None
added
removed
bzrlib/transform.py
