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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_hardlink(self, path, trans_id):
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"""Schedule creation of a hard link"""
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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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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):
757
"""Cannot version a file with no contents, or a bad type.
759
However, existing entries with no contents are okay.
762
for trans_id in self._new_id.iterkeys():
764
kind = self.final_kind(trans_id)
766
conflicts.append(('versioning no contents', trans_id))
768
if not InventoryEntry.versionable_kind(kind):
769
conflicts.append(('versioning bad kind', trans_id, kind))
772
def _executability_conflicts(self):
773
"""Check for bad executability changes.
775
Only versioned files may have their executability set, because
776
1. only versioned entries can have executability under windows
777
2. only files can be executable. (The execute bit on a directory
778
does not indicate searchability)
781
for trans_id in self._new_executability:
782
if self.final_file_id(trans_id) is None:
783
conflicts.append(('unversioned executability', trans_id))
786
non_file = self.final_kind(trans_id) != "file"
790
conflicts.append(('non-file executability', trans_id))
793
def _overwrite_conflicts(self):
794
"""Check for overwrites (not permitted on Win32)"""
796
for trans_id in self._new_contents:
798
self.tree_kind(trans_id)
801
if trans_id not in self._removed_contents:
802
conflicts.append(('overwrite', trans_id,
803
self.final_name(trans_id)))
806
def _duplicate_entries(self, by_parent):
807
"""No directory may have two entries with the same name."""
809
if (self._new_name, self._new_parent) == ({}, {}):
811
for children in by_parent.itervalues():
812
name_ids = [(self.final_name(t), t) for t in children]
813
if not self._tree.case_sensitive:
814
name_ids = [(n.lower(), t) for n, t in name_ids]
818
for name, trans_id in name_ids:
820
kind = self.final_kind(trans_id)
823
file_id = self.final_file_id(trans_id)
824
if kind is None and file_id is None:
826
if name == last_name:
827
conflicts.append(('duplicate', last_trans_id, trans_id,
830
last_trans_id = trans_id
833
def _duplicate_ids(self):
834
"""Each inventory id may only be used once"""
836
removed_tree_ids = set((self.tree_file_id(trans_id) for trans_id in
838
active_tree_ids = set((f for f in self._tree.inventory if
839
f not in removed_tree_ids))
840
for trans_id, file_id in self._new_id.iteritems():
841
if file_id in active_tree_ids:
842
old_trans_id = self.trans_id_tree_file_id(file_id)
843
conflicts.append(('duplicate id', old_trans_id, trans_id))
846
def _parent_type_conflicts(self, by_parent):
847
"""parents must have directory 'contents'."""
849
for parent_id, children in by_parent.iteritems():
850
if parent_id is ROOT_PARENT:
852
if not self._any_contents(children):
854
for child in children:
856
self.final_kind(child)
860
kind = self.final_kind(parent_id)
864
conflicts.append(('missing parent', parent_id))
865
elif kind != "directory":
866
conflicts.append(('non-directory parent', parent_id))
869
def _any_contents(self, trans_ids):
870
"""Return true if any of the trans_ids, will have contents."""
871
for trans_id in trans_ids:
873
kind = self.final_kind(trans_id)
879
def apply(self, no_conflicts=False, _mover=None):
880
"""Apply all changes to the inventory and filesystem.
882
If filesystem or inventory conflicts are present, MalformedTransform
885
If apply succeeds, finalize is not necessary.
887
:param no_conflicts: if True, the caller guarantees there are no
888
conflicts, so no check is made.
889
:param _mover: Supply an alternate FileMover, for testing
892
conflicts = self.find_conflicts()
893
if len(conflicts) != 0:
894
raise MalformedTransform(conflicts=conflicts)
895
inv = self._tree.inventory
897
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
904
child_pb.update('Apply phase', 0, 2)
905
self._apply_removals(inv, inventory_delta, mover)
906
child_pb.update('Apply phase', 1, 2)
907
modified_paths = self._apply_insertions(inv, inventory_delta,
913
mover.apply_deletions()
916
self._tree.apply_inventory_delta(inventory_delta)
919
return _TransformResults(modified_paths, self.rename_count)
921
def _limbo_name(self, trans_id):
922
"""Generate the limbo name of a file"""
923
limbo_name = self._limbo_files.get(trans_id)
924
if limbo_name is not None:
926
parent = self._new_parent.get(trans_id)
927
# if the parent directory is already in limbo (e.g. when building a
928
# tree), choose a limbo name inside the parent, to reduce further
930
use_direct_path = False
931
if self._new_contents.get(parent) == 'directory':
932
filename = self._new_name.get(trans_id)
933
if filename is not None:
934
if parent not in self._limbo_children:
935
self._limbo_children[parent] = set()
936
self._limbo_children_names[parent] = {}
937
use_direct_path = True
938
# the direct path can only be used if no other file has
939
# already taken this pathname, i.e. if the name is unused, or
940
# if it is already associated with this trans_id.
941
elif self._tree.case_sensitive:
942
if (self._limbo_children_names[parent].get(filename)
943
in (trans_id, None)):
944
use_direct_path = True
946
for l_filename, l_trans_id in\
947
self._limbo_children_names[parent].iteritems():
948
if l_trans_id == trans_id:
950
if l_filename.lower() == filename.lower():
953
use_direct_path = True
956
limbo_name = pathjoin(self._limbo_files[parent], filename)
957
self._limbo_children[parent].add(trans_id)
958
self._limbo_children_names[parent][filename] = trans_id
960
limbo_name = pathjoin(self._limbodir, trans_id)
961
self._needs_rename.add(trans_id)
962
self._limbo_files[trans_id] = limbo_name
965
def _apply_removals(self, inv, inventory_delta, mover):
966
"""Perform tree operations that remove directory/inventory names.
968
That is, delete files that are to be deleted, and put any files that
969
need renaming into limbo. This must be done in strict child-to-parent
972
tree_paths = list(self._tree_path_ids.iteritems())
973
tree_paths.sort(reverse=True)
974
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
976
for num, data in enumerate(tree_paths):
977
path, trans_id = data
978
child_pb.update('removing file', num, len(tree_paths))
979
full_path = self._tree.abspath(path)
980
if trans_id in self._removed_contents:
981
mover.pre_delete(full_path, os.path.join(self._deletiondir,
983
elif trans_id in self._new_name or trans_id in \
986
mover.rename(full_path, self._limbo_name(trans_id))
988
if e.errno != errno.ENOENT:
991
self.rename_count += 1
992
if trans_id in self._removed_id:
993
if trans_id == self._new_root:
994
file_id = self._tree.get_root_id()
996
file_id = self.tree_file_id(trans_id)
997
assert file_id is not None
998
inventory_delta.append((path, None, file_id, None))
1002
def _apply_insertions(self, inv, inventory_delta, mover):
1003
"""Perform tree operations that insert directory/inventory names.
1005
That is, create any files that need to be created, and restore from
1006
limbo any files that needed renaming. This must be done in strict
1007
parent-to-child order.
1009
new_paths = self.new_paths()
1011
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1014
for num, (path, trans_id) in enumerate(new_paths):
1016
child_pb.update('adding file', num, len(new_paths))
1018
kind = self._new_contents[trans_id]
1020
kind = contents = None
1021
if trans_id in self._new_contents or \
1022
self.path_changed(trans_id):
1023
full_path = self._tree.abspath(path)
1024
if trans_id in self._needs_rename:
1026
mover.rename(self._limbo_name(trans_id), full_path)
1028
# We may be renaming a dangling inventory id
1029
if e.errno != errno.ENOENT:
1032
self.rename_count += 1
1033
if trans_id in self._new_contents:
1034
modified_paths.append(full_path)
1035
completed_new.append(trans_id)
1037
if trans_id in self._new_id:
1039
kind = file_kind(self._tree.abspath(path))
1040
if trans_id in self._new_reference_revision:
1041
new_entry = inventory.TreeReference(
1042
self._new_id[trans_id],
1043
self._new_name[trans_id],
1044
self.final_file_id(self._new_parent[trans_id]),
1045
None, self._new_reference_revision[trans_id])
1047
new_entry = inventory.make_entry(kind,
1048
self.final_name(trans_id),
1049
self.final_file_id(self.final_parent(trans_id)),
1050
self._new_id[trans_id])
1052
if trans_id in self._new_name or trans_id in\
1053
self._new_parent or\
1054
trans_id in self._new_executability:
1055
file_id = self.final_file_id(trans_id)
1056
if file_id is not None:
1057
entry = inv[file_id]
1058
new_entry = entry.copy()
1060
if trans_id in self._new_name or trans_id in\
1062
if new_entry is not None:
1063
new_entry.name = self.final_name(trans_id)
1064
parent = self.final_parent(trans_id)
1065
parent_id = self.final_file_id(parent)
1066
new_entry.parent_id = parent_id
1068
if trans_id in self._new_executability:
1069
self._set_executability(path, new_entry, trans_id)
1070
if new_entry is not None:
1071
if new_entry.file_id in inv:
1072
old_path = inv.id2path(new_entry.file_id)
1075
inventory_delta.append((old_path, path,
1080
for trans_id in completed_new:
1081
del self._new_contents[trans_id]
1082
return modified_paths
1084
def _set_executability(self, path, entry, trans_id):
1085
"""Set the executability of versioned files """
1086
new_executability = self._new_executability[trans_id]
1087
entry.executable = new_executability
1088
if supports_executable():
1089
abspath = self._tree.abspath(path)
1090
current_mode = os.stat(abspath).st_mode
1091
if new_executability:
1094
to_mode = current_mode | (0100 & ~umask)
1095
# Enable x-bit for others only if they can read it.
1096
if current_mode & 0004:
1097
to_mode |= 0001 & ~umask
1098
if current_mode & 0040:
1099
to_mode |= 0010 & ~umask
1101
to_mode = current_mode & ~0111
1102
os.chmod(abspath, to_mode)
1104
def _new_entry(self, name, parent_id, file_id):
1105
"""Helper function to create a new filesystem entry."""
1106
trans_id = self.create_path(name, parent_id)
1107
if file_id is not None:
1108
self.version_file(file_id, trans_id)
1111
def new_file(self, name, parent_id, contents, file_id=None,
1113
"""Convenience method to create files.
1115
name is the name of the file to create.
1116
parent_id is the transaction id of the parent directory of the file.
1117
contents is an iterator of bytestrings, which will be used to produce
1119
:param file_id: The inventory ID of the file, if it is to be versioned.
1120
:param executable: Only valid when a file_id has been supplied.
1122
trans_id = self._new_entry(name, parent_id, file_id)
1123
# TODO: rather than scheduling a set_executable call,
1124
# have create_file create the file with the right mode.
1125
self.create_file(contents, trans_id)
1126
if executable is not None:
1127
self.set_executability(executable, trans_id)
1130
def new_directory(self, name, parent_id, file_id=None):
1131
"""Convenience method to create directories.
1133
name is the name of the directory to create.
1134
parent_id is the transaction id of the parent directory of the
1136
file_id is the inventory ID of the directory, if it is to be versioned.
1138
trans_id = self._new_entry(name, parent_id, file_id)
1139
self.create_directory(trans_id)
1142
def new_symlink(self, name, parent_id, target, file_id=None):
1143
"""Convenience method to create symbolic link.
1145
name is the name of the symlink to create.
1146
parent_id is the transaction id of the parent directory of the symlink.
1147
target is a bytestring of the target of the symlink.
1148
file_id is the inventory ID of the file, if it is to be versioned.
1150
trans_id = self._new_entry(name, parent_id, file_id)
1151
self.create_symlink(target, trans_id)
1154
def _affected_ids(self):
1155
"""Return the set of transform ids affected by the transform"""
1156
trans_ids = set(self._removed_id)
1157
trans_ids.update(self._new_id.keys())
1158
trans_ids.update(self._removed_contents)
1159
trans_ids.update(self._new_contents.keys())
1160
trans_ids.update(self._new_executability.keys())
1161
trans_ids.update(self._new_name.keys())
1162
trans_ids.update(self._new_parent.keys())
1165
def _get_file_id_maps(self):
1166
"""Return mapping of file_ids to trans_ids in the to and from states"""
1167
trans_ids = self._affected_ids()
1170
# Build up two dicts: trans_ids associated with file ids in the
1171
# FROM state, vs the TO state.
1172
for trans_id in trans_ids:
1173
from_file_id = self.tree_file_id(trans_id)
1174
if from_file_id is not None:
1175
from_trans_ids[from_file_id] = trans_id
1176
to_file_id = self.final_file_id(trans_id)
1177
if to_file_id is not None:
1178
to_trans_ids[to_file_id] = trans_id
1179
return from_trans_ids, to_trans_ids
1181
def _from_file_data(self, from_trans_id, from_versioned, file_id):
1182
"""Get data about a file in the from (tree) state
1184
Return a (name, parent, kind, executable) tuple
1186
from_path = self._tree_id_paths.get(from_trans_id)
1188
# get data from working tree if versioned
1189
from_entry = self._tree.inventory[file_id]
1190
from_name = from_entry.name
1191
from_parent = from_entry.parent_id
1194
if from_path is None:
1195
# File does not exist in FROM state
1199
# File exists, but is not versioned. Have to use path-
1201
from_name = os.path.basename(from_path)
1202
tree_parent = self.get_tree_parent(from_trans_id)
1203
from_parent = self.tree_file_id(tree_parent)
1204
if from_path is not None:
1205
from_kind, from_executable, from_stats = \
1206
self._tree._comparison_data(from_entry, from_path)
1209
from_executable = False
1210
return from_name, from_parent, from_kind, from_executable
1212
def _to_file_data(self, to_trans_id, from_trans_id, from_executable):
1213
"""Get data about a file in the to (target) state
1215
Return a (name, parent, kind, executable) tuple
1217
to_name = self.final_name(to_trans_id)
1219
to_kind = self.final_kind(to_trans_id)
1222
to_parent = self.final_file_id(self.final_parent(to_trans_id))
1223
if to_trans_id in self._new_executability:
1224
to_executable = self._new_executability[to_trans_id]
1225
elif to_trans_id == from_trans_id:
1226
to_executable = from_executable
1228
to_executable = False
1229
return to_name, to_parent, to_kind, to_executable
1231
def _iter_changes(self):
1232
"""Produce output in the same format as Tree._iter_changes.
1234
Will produce nonsensical results if invoked while inventory/filesystem
1235
conflicts (as reported by TreeTransform.find_conflicts()) are present.
1237
This reads the Transform, but only reproduces changes involving a
1238
file_id. Files that are not versioned in either of the FROM or TO
1239
states are not reflected.
1241
final_paths = FinalPaths(self)
1242
from_trans_ids, to_trans_ids = self._get_file_id_maps()
1244
# Now iterate through all active file_ids
1245
for file_id in set(from_trans_ids.keys() + to_trans_ids.keys()):
1247
from_trans_id = from_trans_ids.get(file_id)
1248
# find file ids, and determine versioning state
1249
if from_trans_id is None:
1250
from_versioned = False
1251
from_trans_id = to_trans_ids[file_id]
1253
from_versioned = True
1254
to_trans_id = to_trans_ids.get(file_id)
1255
if to_trans_id is None:
1256
to_versioned = False
1257
to_trans_id = from_trans_id
1261
from_name, from_parent, from_kind, from_executable = \
1262
self._from_file_data(from_trans_id, from_versioned, file_id)
1264
to_name, to_parent, to_kind, to_executable = \
1265
self._to_file_data(to_trans_id, from_trans_id, from_executable)
1267
if not from_versioned:
1270
from_path = self._tree_id_paths.get(from_trans_id)
1271
if not to_versioned:
1274
to_path = final_paths.get_path(to_trans_id)
1275
if from_kind != to_kind:
1277
elif to_kind in ('file', 'symlink') and (
1278
to_trans_id != from_trans_id or
1279
to_trans_id in self._new_contents):
1281
if (not modified and from_versioned == to_versioned and
1282
from_parent==to_parent and from_name == to_name and
1283
from_executable == to_executable):
1285
results.append((file_id, (from_path, to_path), modified,
1286
(from_versioned, to_versioned),
1287
(from_parent, to_parent),
1288
(from_name, to_name),
1289
(from_kind, to_kind),
1290
(from_executable, to_executable)))
1291
return iter(sorted(results, key=lambda x:x[1]))
1294
def joinpath(parent, child):
1295
"""Join tree-relative paths, handling the tree root specially"""
1296
if parent is None or parent == "":
1299
return pathjoin(parent, child)
1302
class FinalPaths(object):
1303
"""Make path calculation cheap by memoizing paths.
1305
The underlying tree must not be manipulated between calls, or else
1306
the results will likely be incorrect.
1308
def __init__(self, transform):
1309
object.__init__(self)
1310
self._known_paths = {}
1311
self.transform = transform
1313
def _determine_path(self, trans_id):
1314
if trans_id == self.transform.root:
1316
name = self.transform.final_name(trans_id)
1317
parent_id = self.transform.final_parent(trans_id)
1318
if parent_id == self.transform.root:
1321
return pathjoin(self.get_path(parent_id), name)
1323
def get_path(self, trans_id):
1324
"""Find the final path associated with a trans_id"""
1325
if trans_id not in self._known_paths:
1326
self._known_paths[trans_id] = self._determine_path(trans_id)
1327
return self._known_paths[trans_id]
1330
def topology_sorted_ids(tree):
1331
"""Determine the topological order of the ids in a tree"""
1332
file_ids = list(tree)
1333
file_ids.sort(key=tree.id2path)
1337
def build_tree(tree, wt, accelerator_tree=None, hardlink=False):
1338
"""Create working tree for a branch, using a TreeTransform.
1340
This function should be used on empty trees, having a tree root at most.
1341
(see merge and revert functionality for working with existing trees)
1343
Existing files are handled like so:
1345
- Existing bzrdirs take precedence over creating new items. They are
1346
created as '%s.diverted' % name.
1347
- Otherwise, if the content on disk matches the content we are building,
1348
it is silently replaced.
1349
- Otherwise, conflict resolution will move the old file to 'oldname.moved'.
1351
:param tree: The tree to convert wt into a copy of
1352
:param wt: The working tree that files will be placed into
1353
:param accelerator_tree: A tree which can be used for retrieving file
1354
contents more quickly than tree itself, i.e. a workingtree. tree
1355
will be used for cases where accelerator_tree's content is different.
1356
:param hardlink: If true, hard-link files to accelerator_tree, where
1357
possible. accelerator_tree must implement id2abspath, i.e. be a
1360
wt.lock_tree_write()
1364
if accelerator_tree is not None:
1365
accelerator_tree.lock_read()
1367
return _build_tree(tree, wt, accelerator_tree, hardlink)
1369
if accelerator_tree is not None:
1370
accelerator_tree.unlock()
1377
def _build_tree(tree, wt, accelerator_tree, hardlink):
1378
"""See build_tree."""
1379
if len(wt.inventory) > 1: # more than just a root
1380
raise errors.WorkingTreeAlreadyPopulated(base=wt.basedir)
1382
top_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1383
pp = ProgressPhase("Build phase", 2, top_pb)
1384
if tree.inventory.root is not None:
1385
# This is kind of a hack: we should be altering the root
1386
# as part of the regular tree shape diff logic.
1387
# The conditional test here is to avoid doing an
1388
# expensive operation (flush) every time the root id
1389
# is set within the tree, nor setting the root and thus
1390
# marking the tree as dirty, because we use two different
1391
# idioms here: tree interfaces and inventory interfaces.
1392
if wt.get_root_id() != tree.get_root_id():
1393
wt.set_root_id(tree.get_root_id())
1395
tt = TreeTransform(wt)
1399
file_trans_id[wt.get_root_id()] = \
1400
tt.trans_id_tree_file_id(wt.get_root_id())
1401
pb = bzrlib.ui.ui_factory.nested_progress_bar()
1403
deferred_contents = []
1405
for num, (tree_path, entry) in \
1406
enumerate(tree.inventory.iter_entries_by_dir()):
1407
pb.update("Building tree", num - len(deferred_contents),
1408
len(tree.inventory))
1409
if entry.parent_id is None:
1412
file_id = entry.file_id
1413
target_path = wt.abspath(tree_path)
1415
kind = file_kind(target_path)
1419
if kind == "directory":
1421
bzrdir.BzrDir.open(target_path)
1422
except errors.NotBranchError:
1426
if (file_id not in divert and
1427
_content_match(tree, entry, file_id, kind,
1429
tt.delete_contents(tt.trans_id_tree_path(tree_path))
1430
if kind == 'directory':
1432
if entry.parent_id not in file_trans_id:
1433
raise AssertionError(
1434
'entry %s parent id %r is not in file_trans_id %r'
1435
% (entry, entry.parent_id, file_trans_id))
1436
parent_id = file_trans_id[entry.parent_id]
1437
if entry.kind == 'file':
1438
# We *almost* replicate new_by_entry, so that we can defer
1439
# getting the file text, and get them all at once.
1440
trans_id = tt.create_path(entry.name, parent_id)
1441
file_trans_id[file_id] = trans_id
1442
tt.version_file(entry.file_id, trans_id)
1443
executable = tree.is_executable(entry.file_id, tree_path)
1444
if executable is not None:
1445
tt.set_executability(executable, trans_id)
1446
deferred_contents.append((entry.file_id, trans_id))
1448
file_trans_id[file_id] = new_by_entry(tt, entry, parent_id,
1451
new_trans_id = file_trans_id[file_id]
1452
old_parent = tt.trans_id_tree_path(tree_path)
1453
_reparent_children(tt, old_parent, new_trans_id)
1454
offset = num +1 - len(deferred_contents)
1455
_create_files(tt, tree, deferred_contents, pb, offset,
1456
accelerator_tree, hardlink)
1460
divert_trans = set(file_trans_id[f] for f in divert)
1461
resolver = lambda t, c: resolve_checkout(t, c, divert_trans)
1462
raw_conflicts = resolve_conflicts(tt, pass_func=resolver)
1463
conflicts = cook_conflicts(raw_conflicts, tt)
1464
for conflict in conflicts:
1467
wt.add_conflicts(conflicts)
1468
except errors.UnsupportedOperation:
1470
result = tt.apply(no_conflicts=True)
1477
def _create_files(tt, tree, desired_files, pb, offset, accelerator_tree,
1479
total = len(desired_files) + offset
1480
if accelerator_tree is None:
1481
new_desired_files = desired_files
1483
iter = accelerator_tree._iter_changes(tree, include_unchanged=True)
1484
unchanged = dict((f, p[0]) for (f, p, c, v, d, n, k, e)
1485
in iter if not (c or e[0] != e[1]))
1486
new_desired_files = []
1488
for file_id, trans_id in desired_files:
1489
accelerator_path = unchanged.get(file_id)
1490
if accelerator_path is None:
1491
new_desired_files.append((file_id, trans_id))
1493
pb.update('Adding file contents', count+offset, total)
1495
tt.create_hardlink(accelerator_tree.id2abspath(file_id),
1498
contents = accelerator_tree.get_file(file_id, accelerator_path)
1500
tt.create_file(contents, trans_id)
1506
for count, (trans_id, contents) in enumerate(tree.iter_files_bytes(
1507
new_desired_files)):
1508
tt.create_file(contents, trans_id)
1509
pb.update('Adding file contents', count+offset, total)
1512
def _reparent_children(tt, old_parent, new_parent):
1513
for child in tt.iter_tree_children(old_parent):
1514
tt.adjust_path(tt.final_name(child), new_parent, child)
1517
def _content_match(tree, entry, file_id, kind, target_path):
1518
if entry.kind != kind:
1520
if entry.kind == "directory":
1522
if entry.kind == "file":
1523
if tree.get_file(file_id).read() == file(target_path, 'rb').read():
1525
elif entry.kind == "symlink":
1526
if tree.get_symlink_target(file_id) == os.readlink(target_path):
1531
def resolve_checkout(tt, conflicts, divert):
1532
new_conflicts = set()
1533
for c_type, conflict in ((c[0], c) for c in conflicts):
1534
# Anything but a 'duplicate' would indicate programmer error
1535
assert c_type == 'duplicate', c_type
1536
# Now figure out which is new and which is old
1537
if tt.new_contents(conflict[1]):
1538
new_file = conflict[1]
1539
old_file = conflict[2]
1541
new_file = conflict[2]
1542
old_file = conflict[1]
1544
# We should only get here if the conflict wasn't completely
1546
final_parent = tt.final_parent(old_file)
1547
if new_file in divert:
1548
new_name = tt.final_name(old_file)+'.diverted'
1549
tt.adjust_path(new_name, final_parent, new_file)
1550
new_conflicts.add((c_type, 'Diverted to',
1551
new_file, old_file))
1553
new_name = tt.final_name(old_file)+'.moved'
1554
tt.adjust_path(new_name, final_parent, old_file)
1555
new_conflicts.add((c_type, 'Moved existing file to',
1556
old_file, new_file))
1557
return new_conflicts
1560
def new_by_entry(tt, entry, parent_id, tree):
1561
"""Create a new file according to its inventory entry"""
1565
contents = tree.get_file(entry.file_id).readlines()
1566
executable = tree.is_executable(entry.file_id)
1567
return tt.new_file(name, parent_id, contents, entry.file_id,
1569
elif kind in ('directory', 'tree-reference'):
1570
trans_id = tt.new_directory(name, parent_id, entry.file_id)
1571
if kind == 'tree-reference':
1572
tt.set_tree_reference(entry.reference_revision, trans_id)
1574
elif kind == 'symlink':
1575
target = tree.get_symlink_target(entry.file_id)
1576
return tt.new_symlink(name, parent_id, target, entry.file_id)
1578
raise errors.BadFileKindError(name, kind)
1581
def create_by_entry(tt, entry, tree, trans_id, lines=None, mode_id=None):
1582
"""Create new file contents according to an inventory entry."""
1583
if entry.kind == "file":
1585
lines = tree.get_file(entry.file_id).readlines()
1586
tt.create_file(lines, trans_id, mode_id=mode_id)
1587
elif entry.kind == "symlink":
1588
tt.create_symlink(tree.get_symlink_target(entry.file_id), trans_id)
1589
elif entry.kind == "directory":
1590
tt.create_directory(trans_id)
1593
def create_entry_executability(tt, entry, trans_id):
1594
"""Set the executability of a trans_id according to an inventory entry"""
1595
if entry.kind == "file":
1596
tt.set_executability(entry.executable, trans_id)
1599
@deprecated_function(zero_fifteen)
1600
def find_interesting(working_tree, target_tree, filenames):
1601
"""Find the ids corresponding to specified filenames.
1603
Deprecated: Please use tree1.paths2ids(filenames, [tree2]).
1605
working_tree.lock_read()
1607
target_tree.lock_read()
1609
return working_tree.paths2ids(filenames, [target_tree])
1611
target_tree.unlock()
1613
working_tree.unlock()
1616
@deprecated_function(zero_ninety)
1617
def change_entry(tt, file_id, working_tree, target_tree,
1618
trans_id_file_id, backups, trans_id, by_parent):
1619
"""Replace a file_id's contents with those from a target tree."""
1620
if file_id is None and target_tree is None:
1621
# skip the logic altogether in the deprecation test
1623
e_trans_id = trans_id_file_id(file_id)
1624
entry = target_tree.inventory[file_id]
1625
has_contents, contents_mod, meta_mod, = _entry_changes(file_id, entry,
1628
mode_id = e_trans_id
1631
tt.delete_contents(e_trans_id)
1633
parent_trans_id = trans_id_file_id(entry.parent_id)
1634
backup_name = get_backup_name(entry, by_parent,
1635
parent_trans_id, tt)
1636
tt.adjust_path(backup_name, parent_trans_id, e_trans_id)
1637
tt.unversion_file(e_trans_id)
1638
e_trans_id = tt.create_path(entry.name, parent_trans_id)
1639
tt.version_file(file_id, e_trans_id)
1640
trans_id[file_id] = e_trans_id
1641
create_by_entry(tt, entry, target_tree, e_trans_id, mode_id=mode_id)
1642
create_entry_executability(tt, entry, e_trans_id)
1645
tt.set_executability(entry.executable, e_trans_id)
1646
if tt.final_name(e_trans_id) != entry.name:
1649
parent_id = tt.final_parent(e_trans_id)
1650
parent_file_id = tt.final_file_id(parent_id)
1651
if parent_file_id != entry.parent_id:
1656
parent_trans_id = trans_id_file_id(entry.parent_id)
1657
tt.adjust_path(entry.name, parent_trans_id, e_trans_id)
1660
def get_backup_name(entry, by_parent, parent_trans_id, tt):
1661
return _get_backup_name(entry.name, by_parent, parent_trans_id, tt)
1664
def _get_backup_name(name, by_parent, parent_trans_id, tt):
1665
"""Produce a backup-style name that appears to be available"""
1669
yield "%s.~%d~" % (name, counter)
1671
for new_name in name_gen():
1672
if not tt.has_named_child(by_parent, parent_trans_id, new_name):
1676
def _entry_changes(file_id, entry, working_tree):
1677
"""Determine in which ways the inventory entry has changed.
1679
Returns booleans: has_contents, content_mod, meta_mod
1680
has_contents means there are currently contents, but they differ
1681
contents_mod means contents need to be modified
1682
meta_mod means the metadata needs to be modified
1684
cur_entry = working_tree.inventory[file_id]
1686
working_kind = working_tree.kind(file_id)
1689
has_contents = False
1692
if has_contents is True:
1693
if entry.kind != working_kind:
1694
contents_mod, meta_mod = True, False
1696
cur_entry._read_tree_state(working_tree.id2path(file_id),
1698
contents_mod, meta_mod = entry.detect_changes(cur_entry)
1699
cur_entry._forget_tree_state()
1700
return has_contents, contents_mod, meta_mod
1703
def revert(working_tree, target_tree, filenames, backups=False,
1704
pb=DummyProgress(), change_reporter=None):
1705
"""Revert a working tree's contents to those of a target tree."""
1706
target_tree.lock_read()
1707
tt = TreeTransform(working_tree, pb)
1709
pp = ProgressPhase("Revert phase", 3, pb)
1711
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1713
merge_modified = _alter_files(working_tree, target_tree, tt,
1714
child_pb, filenames, backups)
1718
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1720
raw_conflicts = resolve_conflicts(tt, child_pb,
1721
lambda t, c: conflict_pass(t, c, target_tree))
1724
conflicts = cook_conflicts(raw_conflicts, tt)
1726
change_reporter = delta._ChangeReporter(
1727
unversioned_filter=working_tree.is_ignored)
1728
delta.report_changes(tt._iter_changes(), change_reporter)
1729
for conflict in conflicts:
1733
working_tree.set_merge_modified(merge_modified)
1735
target_tree.unlock()
1741
def _alter_files(working_tree, target_tree, tt, pb, specific_files,
1743
merge_modified = working_tree.merge_modified()
1744
change_list = target_tree._iter_changes(working_tree,
1745
specific_files=specific_files, pb=pb)
1746
if target_tree.inventory.root is None:
1753
for id_num, (file_id, path, changed_content, versioned, parent, name,
1754
kind, executable) in enumerate(change_list):
1755
if skip_root and file_id[0] is not None and parent[0] is None:
1757
trans_id = tt.trans_id_file_id(file_id)
1760
keep_content = False
1761
if kind[0] == 'file' and (backups or kind[1] is None):
1762
wt_sha1 = working_tree.get_file_sha1(file_id)
1763
if merge_modified.get(file_id) != wt_sha1:
1764
# acquire the basis tree lazily to prevent the
1765
# expense of accessing it when it's not needed ?
1766
# (Guessing, RBC, 200702)
1767
if basis_tree is None:
1768
basis_tree = working_tree.basis_tree()
1769
basis_tree.lock_read()
1770
if file_id in basis_tree:
1771
if wt_sha1 != basis_tree.get_file_sha1(file_id):
1773
elif kind[1] is None and not versioned[1]:
1775
if kind[0] is not None:
1776
if not keep_content:
1777
tt.delete_contents(trans_id)
1778
elif kind[1] is not None:
1779
parent_trans_id = tt.trans_id_file_id(parent[0])
1780
by_parent = tt.by_parent()
1781
backup_name = _get_backup_name(name[0], by_parent,
1782
parent_trans_id, tt)
1783
tt.adjust_path(backup_name, parent_trans_id, trans_id)
1784
new_trans_id = tt.create_path(name[0], parent_trans_id)
1785
if versioned == (True, True):
1786
tt.unversion_file(trans_id)
1787
tt.version_file(file_id, new_trans_id)
1788
# New contents should have the same unix perms as old
1791
trans_id = new_trans_id
1792
if kind[1] == 'directory':
1793
tt.create_directory(trans_id)
1794
elif kind[1] == 'symlink':
1795
tt.create_symlink(target_tree.get_symlink_target(file_id),
1797
elif kind[1] == 'file':
1798
deferred_files.append((file_id, (trans_id, mode_id)))
1799
if basis_tree is None:
1800
basis_tree = working_tree.basis_tree()
1801
basis_tree.lock_read()
1802
new_sha1 = target_tree.get_file_sha1(file_id)
1803
if (file_id in basis_tree and new_sha1 ==
1804
basis_tree.get_file_sha1(file_id)):
1805
if file_id in merge_modified:
1806
del merge_modified[file_id]
1808
merge_modified[file_id] = new_sha1
1810
# preserve the execute bit when backing up
1811
if keep_content and executable[0] == executable[1]:
1812
tt.set_executability(executable[1], trans_id)
1814
assert kind[1] is None
1815
if versioned == (False, True):
1816
tt.version_file(file_id, trans_id)
1817
if versioned == (True, False):
1818
tt.unversion_file(trans_id)
1819
if (name[1] is not None and
1820
(name[0] != name[1] or parent[0] != parent[1])):
1822
name[1], tt.trans_id_file_id(parent[1]), trans_id)
1823
if executable[0] != executable[1] and kind[1] == "file":
1824
tt.set_executability(executable[1], trans_id)
1825
for (trans_id, mode_id), bytes in target_tree.iter_files_bytes(
1827
tt.create_file(bytes, trans_id, mode_id)
1829
if basis_tree is not None:
1831
return merge_modified
1834
def resolve_conflicts(tt, pb=DummyProgress(), pass_func=None):
1835
"""Make many conflict-resolution attempts, but die if they fail"""
1836
if pass_func is None:
1837
pass_func = conflict_pass
1838
new_conflicts = set()
1841
pb.update('Resolution pass', n+1, 10)
1842
conflicts = tt.find_conflicts()
1843
if len(conflicts) == 0:
1844
return new_conflicts
1845
new_conflicts.update(pass_func(tt, conflicts))
1846
raise MalformedTransform(conflicts=conflicts)
1851
def conflict_pass(tt, conflicts, path_tree=None):
1852
"""Resolve some classes of conflicts.
1854
:param tt: The transform to resolve conflicts in
1855
:param conflicts: The conflicts to resolve
1856
:param path_tree: A Tree to get supplemental paths from
1858
new_conflicts = set()
1859
for c_type, conflict in ((c[0], c) for c in conflicts):
1860
if c_type == 'duplicate id':
1861
tt.unversion_file(conflict[1])
1862
new_conflicts.add((c_type, 'Unversioned existing file',
1863
conflict[1], conflict[2], ))
1864
elif c_type == 'duplicate':
1865
# files that were renamed take precedence
1866
final_parent = tt.final_parent(conflict[1])
1867
if tt.path_changed(conflict[1]):
1868
existing_file, new_file = conflict[2], conflict[1]
1870
existing_file, new_file = conflict[1], conflict[2]
1871
new_name = tt.final_name(existing_file)+'.moved'
1872
tt.adjust_path(new_name, final_parent, existing_file)
1873
new_conflicts.add((c_type, 'Moved existing file to',
1874
existing_file, new_file))
1875
elif c_type == 'parent loop':
1876
# break the loop by undoing one of the ops that caused the loop
1878
while not tt.path_changed(cur):
1879
cur = tt.final_parent(cur)
1880
new_conflicts.add((c_type, 'Cancelled move', cur,
1881
tt.final_parent(cur),))
1882
tt.adjust_path(tt.final_name(cur), tt.get_tree_parent(cur), cur)
1884
elif c_type == 'missing parent':
1885
trans_id = conflict[1]
1887
tt.cancel_deletion(trans_id)
1888
new_conflicts.add(('deleting parent', 'Not deleting',
1891
tt.create_directory(trans_id)
1892
new_conflicts.add((c_type, 'Created directory', trans_id))
1894
tt.final_name(trans_id)
1896
if path_tree is not None:
1897
file_id = tt.final_file_id(trans_id)
1898
entry = path_tree.inventory[file_id]
1899
parent_trans_id = tt.trans_id_file_id(entry.parent_id)
1900
tt.adjust_path(entry.name, parent_trans_id, trans_id)
1901
elif c_type == 'unversioned parent':
1902
tt.version_file(tt.inactive_file_id(conflict[1]), conflict[1])
1903
new_conflicts.add((c_type, 'Versioned directory', conflict[1]))
1904
return new_conflicts
1907
def cook_conflicts(raw_conflicts, tt):
1908
"""Generate a list of cooked conflicts, sorted by file path"""
1909
from bzrlib.conflicts import Conflict
1910
conflict_iter = iter_cook_conflicts(raw_conflicts, tt)
1911
return sorted(conflict_iter, key=Conflict.sort_key)
1914
def iter_cook_conflicts(raw_conflicts, tt):
1915
from bzrlib.conflicts import Conflict
1917
for conflict in raw_conflicts:
1918
c_type = conflict[0]
1919
action = conflict[1]
1920
modified_path = fp.get_path(conflict[2])
1921
modified_id = tt.final_file_id(conflict[2])
1922
if len(conflict) == 3:
1923
yield Conflict.factory(c_type, action=action, path=modified_path,
1924
file_id=modified_id)
1927
conflicting_path = fp.get_path(conflict[3])
1928
conflicting_id = tt.final_file_id(conflict[3])
1929
yield Conflict.factory(c_type, action=action, path=modified_path,
1930
file_id=modified_id,
1931
conflict_path=conflicting_path,
1932
conflict_file_id=conflicting_id)
1935
class _FileMover(object):
1936
"""Moves and deletes files for TreeTransform, tracking operations"""
1939
self.past_renames = []
1940
self.pending_deletions = []
1942
def rename(self, from_, to):
1943
"""Rename a file from one path to another. Functions like os.rename"""
1945
os.rename(from_, to)
1947
if e.errno in (errno.EEXIST, errno.ENOTEMPTY):
1948
raise errors.FileExists(to, str(e))
1950
self.past_renames.append((from_, to))
1952
def pre_delete(self, from_, to):
1953
"""Rename a file out of the way and mark it for deletion.
1955
Unlike os.unlink, this works equally well for files and directories.
1956
:param from_: The current file path
1957
:param to: A temporary path for the file
1959
self.rename(from_, to)
1960
self.pending_deletions.append(to)
1963
"""Reverse all renames that have been performed"""
1964
for from_, to in reversed(self.past_renames):
1965
os.rename(to, from_)
1966
# after rollback, don't reuse _FileMover
1968
pending_deletions = None
1970
def apply_deletions(self):
1971
"""Apply all marked deletions"""
1972
for path in self.pending_deletions:
1974
# after apply_deletions, don't reuse _FileMover
1976
pending_deletions = None
added
removed
bzrlib/transform.py
