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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Tree classes, representing directory at point in time.
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from collections import deque
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from cStringIO import StringIO
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from bzrlib import (
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conflicts as _mod_conflicts,
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revision as _mod_revision,
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from bzrlib.decorators import needs_read_lock
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from bzrlib.errors import BzrError, NoSuchId
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from bzrlib.errors import BzrError, BzrCheckError
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from bzrlib import errors
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from bzrlib.inventory import InventoryFile
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from bzrlib.inventory import Inventory, InventoryFile
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from bzrlib.inter import InterObject
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from bzrlib.osutils import fingerprint_file
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from bzrlib.symbol_versioning import deprecated_function, deprecated_in
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from bzrlib.trace import note
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import bzrlib.revision
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from bzrlib.trace import mutter, note
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class Tree(object):
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"""Abstract file tree.
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There are several subclasses:
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* `WorkingTree` exists as files on disk editable by the user.
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* `RevisionTree` is a tree as recorded at some point in the past.
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want_unversioned=want_unversioned,
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@symbol_versioning.deprecated_method(symbol_versioning.one_three)
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def _iter_changes(self, *args, **kwargs):
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return self.iter_changes(*args, **kwargs)
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def iter_changes(self, from_tree, include_unchanged=False,
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specific_files=None, pb=None, extra_trees=None,
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require_versioned=True, want_unversioned=False):
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"""See InterTree.iter_changes"""
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intertree = InterTree.get(from_tree, self)
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return intertree.iter_changes(include_unchanged, specific_files, pb,
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extra_trees, require_versioned, want_unversioned=want_unversioned)
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def conflicts(self):
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"""Get a list of the conflicts in the tree.
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The yield order (ignoring root) would be::
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a, f, a/b, a/d, a/b/c, a/d/e, f/g
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:param yield_parents: If True, yield the parents from the root leading
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down to specific_file_ids that have been requested. This has no
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impact if specific_file_ids is None.
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return self.inventory.iter_entries_by_dir(
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specific_file_ids=specific_file_ids, yield_parents=yield_parents)
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specific_file_ids=specific_file_ids)
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def iter_references(self):
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if self.supports_tree_reference():
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for path, entry in self.iter_entries_by_dir():
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if entry.kind == 'tree-reference':
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yield path, entry.file_id
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for path, entry in self.iter_entries_by_dir():
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if entry.kind == 'tree-reference':
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yield path, entry.file_id
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def kind(self, file_id):
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raise NotImplementedError("Tree subclass %s must implement kind"
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def path_content_summary(self, path):
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"""Get a summary of the information about path.
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All the attributes returned are for the canonical form, not the
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convenient form (if content filters are in use.)
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:param path: A relative path within the tree.
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:return: A tuple containing kind, size, exec, sha1-or-link.
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Kind is always present (see tree.kind()).
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size is present if kind is file and the size of the
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canonical form can be cheaply determined, None otherwise.
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size is present if kind is file, None otherwise.
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exec is None unless kind is file and the platform supports the 'x'
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sha1-or-link is the link target if kind is symlink, or the sha1 if
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def _get_inventory(self):
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return self._inventory
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def get_file(self, file_id, path=None):
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"""Return a file object for the file file_id in the tree.
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If both file_id and path are defined, it is implementation defined as
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to which one is used.
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raise NotImplementedError(self.get_file)
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def get_file_with_stat(self, file_id, path=None):
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"""Get a file handle and stat object for file_id.
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The default implementation returns (self.get_file, None) for backwards
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:param file_id: The file id to read.
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:param path: The path of the file, if it is known.
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:return: A tuple (file_handle, stat_value_or_None). If the tree has
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no stat facility, or need for a stat cache feedback during commit,
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it may return None for the second element of the tuple.
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return (self.get_file(file_id, path), None)
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def get_file_text(self, file_id, path=None):
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"""Return the byte content of a file.
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:param file_id: The file_id of the file.
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:param path: The path of the file.
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If both file_id and path are supplied, an implementation may use
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my_file = self.get_file(file_id, path)
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return my_file.read()
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def get_file_lines(self, file_id, path=None):
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"""Return the content of a file, as lines.
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:param file_id: The file_id of the file.
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:param path: The path of the file.
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If both file_id and path are supplied, an implementation may use
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return osutils.split_lines(self.get_file_text(file_id, path))
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def get_file_mtime(self, file_id, path=None):
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"""Return the modification time for a file.
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raise NotImplementedError(self.get_symlink_target)
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def get_canonical_inventory_paths(self, paths):
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"""Like get_canonical_inventory_path() but works on multiple items.
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:param paths: A sequence of paths relative to the root of the tree.
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:return: A list of paths, with each item the corresponding input path
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adjusted to account for existing elements that match case
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return list(self._yield_canonical_inventory_paths(paths))
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def get_canonical_inventory_path(self, path):
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"""Returns the first inventory item that case-insensitively matches path.
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If a path matches exactly, it is returned. If no path matches exactly
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but more than one path matches case-insensitively, it is implementation
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defined which is returned.
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If no path matches case-insensitively, the input path is returned, but
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with as many path entries that do exist changed to their canonical
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If you need to resolve many names from the same tree, you should
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use get_canonical_inventory_paths() to avoid O(N) behaviour.
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:param path: A paths relative to the root of the tree.
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:return: The input path adjusted to account for existing elements
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that match case insensitively.
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return self._yield_canonical_inventory_paths([path]).next()
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def _yield_canonical_inventory_paths(self, paths):
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# First, if the path as specified exists exactly, just use it.
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if self.path2id(path) is not None:
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cur_id = self.get_root_id()
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bit_iter = iter(path.split("/"))
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for child in self.iter_children(cur_id):
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# XXX: it seem like if the child is known to be in the
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# tree, we shouldn't need to go from its id back to
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# its path -- mbp 2010-02-11
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# XXX: it seems like we could be more efficient
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# by just directly looking up the original name and
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# only then searching all children; also by not
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# chopping paths so much. -- mbp 2010-02-11
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child_base = os.path.basename(self.id2path(child))
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if (child_base == elt):
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# if we found an exact match, we can stop now; if
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# we found an approximate match we need to keep
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# searching because there might be an exact match
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new_path = osutils.pathjoin(cur_path, child_base)
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elif child_base.lower() == lelt:
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new_path = osutils.pathjoin(cur_path, child_base)
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# before a change is committed we can see this error...
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# got to the end of this directory and no entries matched.
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# Return what matched so far, plus the rest as specified.
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cur_path = osutils.pathjoin(cur_path, elt, *list(bit_iter))
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def get_root_id(self):
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"""Return the file_id for the root of this tree."""
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raise NotImplementedError(self.get_root_id)
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This yields all the data about the contents of a directory at a time.
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After each directory has been yielded, if the caller has mutated the
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list to exclude some directories, they are then not descended into.
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The data yielded is of the form:
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((directory-relpath, directory-path-from-root, directory-fileid),
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[(relpath, basename, kind, lstat, path_from_tree_root, file_id,
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[(relpath, basename, kind, lstat, path_from_tree_root, file_id,
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versioned_kind), ...]),
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- directory-relpath is the containing dirs relpath from prefix
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- directory-path-from-root is the containing dirs path from /
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raise NotImplementedError(self.walkdirs)
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def supports_content_filtering(self):
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def _content_filter_stack(self, path=None, file_id=None):
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"""The stack of content filters for a path if filtering is supported.
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Readers will be applied in first-to-last order.
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Writers will be applied in last-to-first order.
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Either the path or the file-id needs to be provided.
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:param path: path relative to the root of the tree
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:param file_id: file_id or None if unknown
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:return: the list of filters - [] if there are none
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filter_pref_names = filters._get_registered_names()
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if len(filter_pref_names) == 0:
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path = self.id2path(file_id)
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prefs = self.iter_search_rules([path], filter_pref_names).next()
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stk = filters._get_filter_stack_for(prefs)
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if 'filters' in debug.debug_flags:
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note("*** %s content-filter: %s => %r" % (path,prefs,stk))
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def _content_filter_stack_provider(self):
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"""A function that returns a stack of ContentFilters.
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The function takes a path (relative to the top of the tree) and a
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file-id as parameters.
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:return: None if content filtering is not supported by this tree.
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if self.supports_content_filtering():
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return lambda path, file_id: \
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self._content_filter_stack(path, file_id)
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def iter_search_rules(self, path_names, pref_names=None,
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_default_searcher=None):
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_default_searcher=rules._per_user_searcher):
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"""Find the preferences for filenames in a tree.
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:param path_names: an iterable of paths to find attributes for.
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for path in path_names:
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yield searcher.get_items(path)
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def _get_rules_searcher(self, default_searcher):
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"""Get the RulesSearcher for this tree given the default one."""
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searcher = default_searcher
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class EmptyTree(Tree):
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self._inventory = Inventory(root_id=None)
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symbol_versioning.warn('EmptyTree is deprecated as of bzr 0.9 please'
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' use repository.revision_tree instead.',
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DeprecationWarning, stacklevel=2)
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def get_parent_ids(self):
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def get_symlink_target(self, file_id):
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def has_filename(self, filename):
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def kind(self, file_id):
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def list_files(self, include_root=False):
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def __contains__(self, file_id):
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return (file_id in self._inventory)
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def get_file_sha1(self, file_id, path=None, stat_value=None):
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######################################################################
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will pass through to InterTree as appropriate.
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# Formats that will be used to test this InterTree. If both are
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# None, this InterTree will not be tested (e.g. because a complex
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_matching_from_tree_format = None
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_matching_to_tree_format = None
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def _changes_from_entries(self, source_entry, target_entry,
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source_path=None, target_path=None):
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"""Generate a iter_changes tuple between source_entry and target_entry.
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:param source_entry: An inventory entry from self.source, or None.
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:param target_entry: An inventory entry from self.target, or None.
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:param source_path: The path of source_entry, if known. If not known
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it will be looked up.
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:param target_path: The path of target_entry, if known. If not known
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it will be looked up.
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:return: A tuple, item 0 of which is an iter_changes result tuple, and
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item 1 is True if there are any changes in the result tuple.
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if source_entry is None:
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if target_entry is None:
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file_id = target_entry.file_id
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file_id = source_entry.file_id
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if source_entry is not None:
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source_versioned = True
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source_name = source_entry.name
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source_parent = source_entry.parent_id
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if source_path is None:
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source_path = self.source.id2path(file_id)
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source_kind, source_executable, source_stat = \
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self.source._comparison_data(source_entry, source_path)
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source_versioned = False
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source_executable = None
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if target_entry is not None:
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target_versioned = True
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target_name = target_entry.name
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target_parent = target_entry.parent_id
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if target_path is None:
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target_path = self.target.id2path(file_id)
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target_kind, target_executable, target_stat = \
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self.target._comparison_data(target_entry, target_path)
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target_versioned = False
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target_executable = None
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versioned = (source_versioned, target_versioned)
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kind = (source_kind, target_kind)
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changed_content = False
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if source_kind != target_kind:
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changed_content = True
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elif source_kind == 'file':
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if (self.source.get_file_sha1(file_id, source_path, source_stat) !=
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self.target.get_file_sha1(file_id, target_path, target_stat)):
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changed_content = True
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elif source_kind == 'symlink':
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if (self.source.get_symlink_target(file_id) !=
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self.target.get_symlink_target(file_id)):
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changed_content = True
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# XXX: Yes, the indentation below is wrong. But fixing it broke
941
# test_merge.TestMergerEntriesLCAOnDisk.
942
# test_nested_tree_subtree_renamed_and_modified. We'll wait for
943
# the fix from bzr.dev -- vila 2009026
944
elif source_kind == 'tree-reference':
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if (self.source.get_reference_revision(file_id, source_path)
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!= self.target.get_reference_revision(file_id, target_path)):
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changed_content = True
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parent = (source_parent, target_parent)
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name = (source_name, target_name)
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executable = (source_executable, target_executable)
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if (changed_content is not False or versioned[0] != versioned[1]
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or parent[0] != parent[1] or name[0] != name[1] or
953
executable[0] != executable[1]):
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return (file_id, (source_path, target_path), changed_content,
958
versioned, parent, name, kind, executable), changes
961
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def compare(self, want_unchanged=False, specific_files=None,
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extra_trees=None, require_versioned=False, include_root=False,
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:param require_versioned: Raise errors.PathsNotVersionedError if a
1024
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path in the specific_files list is not versioned in one of
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source, target or extra_trees.
1026
:param specific_files: An optional list of file paths to restrict the
1027
comparison to. When mapping filenames to ids, all matches in all
1028
trees (including optional extra_trees) are used, and all children
1029
of matched directories are included. The parents in the target tree
1030
of the specific files up to and including the root of the tree are
1031
always evaluated for changes too.
1032
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:param want_unversioned: Should unversioned files be returned in the
1033
818
output. An unversioned file is defined as one with (False, False)
1034
819
for the versioned pair.
1036
822
lookup_trees = [self.source]
1038
824
lookup_trees.extend(extra_trees)
1039
# The ids of items we need to examine to insure delta consistency.
1040
precise_file_ids = set()
1041
changed_file_ids = []
1042
825
if specific_files == []:
1043
826
specific_file_ids = []
1045
828
specific_file_ids = self.target.paths2ids(specific_files,
1046
829
lookup_trees, require_versioned=require_versioned)
1047
if specific_files is not None:
1048
# reparented or added entries must have their parents included
1049
# so that valid deltas can be created. The seen_parents set
1050
# tracks the parents that we need to have.
1051
# The seen_dirs set tracks directory entries we've yielded.
1052
# After outputting version object in to_entries we set difference
1053
# the two seen sets and start checking parents.
1054
seen_parents = set()
1056
830
if want_unversioned:
1057
831
all_unversioned = sorted([(p.split('/'), p) for p in
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832
self.target.extras()
1069
843
specific_file_ids=specific_file_ids))
1070
844
num_entries = len(from_entries_by_dir) + len(to_entries_by_dir)
1072
# the unversioned path lookup only occurs on real trees - where there
846
# the unversioned path lookup only occurs on real trees - where there
1073
847
# can be extras. So the fake_entry is solely used to look up
1074
848
# executable it values when execute is not supported.
1075
849
fake_entry = InventoryFile('unused', 'unused', 'unused')
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for target_path, target_entry in to_entries_by_dir:
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while (all_unversioned and
1078
all_unversioned[0][0] < target_path.split('/')):
850
for to_path, to_entry in to_entries_by_dir:
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while all_unversioned and all_unversioned[0][0] < to_path.split('/'):
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852
unversioned_path = all_unversioned.popleft()
1080
target_kind, target_executable, target_stat = \
853
to_kind, to_executable, to_stat = \
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854
self.target._comparison_data(fake_entry, unversioned_path[1])
1082
855
yield (None, (None, unversioned_path[1]), True, (False, False),
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857
(None, unversioned_path[0][-1]),
1085
(None, target_kind),
1086
(None, target_executable))
1087
source_path, source_entry = from_data.get(target_entry.file_id,
1089
result, changes = self._changes_from_entries(source_entry,
1090
target_entry, source_path=source_path, target_path=target_path)
1091
to_paths[result[0]] = result[1][1]
859
(None, to_executable))
860
file_id = to_entry.file_id
861
to_paths[file_id] = to_path
1092
862
entry_count += 1
863
changed_content = False
864
from_path, from_entry = from_data.get(file_id, (None, None))
865
from_versioned = (from_entry is not None)
866
if from_entry is not None:
867
from_versioned = True
868
from_name = from_entry.name
869
from_parent = from_entry.parent_id
870
from_kind, from_executable, from_stat = \
871
self.source._comparison_data(from_entry, from_path)
1094
872
entry_count += 1
874
from_versioned = False
878
from_executable = None
879
versioned = (from_versioned, True)
880
to_kind, to_executable, to_stat = \
881
self.target._comparison_data(to_entry, to_path)
882
kind = (from_kind, to_kind)
883
if kind[0] != kind[1]:
884
changed_content = True
885
elif from_kind == 'file':
886
from_size = self.source._file_size(from_entry, from_stat)
887
to_size = self.target._file_size(to_entry, to_stat)
888
if from_size != to_size:
889
changed_content = True
890
elif (self.source.get_file_sha1(file_id, from_path, from_stat) !=
891
self.target.get_file_sha1(file_id, to_path, to_stat)):
892
changed_content = True
893
elif from_kind == 'symlink':
894
if (self.source.get_symlink_target(file_id) !=
895
self.target.get_symlink_target(file_id)):
896
changed_content = True
897
elif from_kind == 'tree-reference':
898
if (self.source.get_reference_revision(file_id, from_path)
899
!= self.target.get_reference_revision(file_id, to_path)):
900
changed_content = True
901
parent = (from_parent, to_entry.parent_id)
902
name = (from_name, to_entry.name)
903
executable = (from_executable, to_executable)
1095
904
if pb is not None:
1096
905
pb.update('comparing files', entry_count, num_entries)
1097
if changes or include_unchanged:
1098
if specific_file_ids is not None:
1099
new_parent_id = result[4][1]
1100
precise_file_ids.add(new_parent_id)
1101
changed_file_ids.append(result[0])
1103
# Ensure correct behaviour for reparented/added specific files.
1104
if specific_files is not None:
1105
# Record output dirs
1106
if result[6][1] == 'directory':
1107
seen_dirs.add(result[0])
1108
# Record parents of reparented/added entries.
1109
versioned = result[3]
1111
if not versioned[0] or parents[0] != parents[1]:
1112
seen_parents.add(parents[1])
906
if (changed_content is not False or versioned[0] != versioned[1]
907
or parent[0] != parent[1] or name[0] != name[1] or
908
executable[0] != executable[1] or include_unchanged):
909
yield (file_id, (from_path, to_path), changed_content,
910
versioned, parent, name, kind, executable)
1113
912
while all_unversioned:
1114
913
# yield any trailing unversioned paths
1115
914
unversioned_path = all_unversioned.popleft()
1120
919
(None, unversioned_path[0][-1]),
1121
920
(None, to_kind),
1122
921
(None, to_executable))
1123
# Yield all remaining source paths
923
def get_to_path(to_entry):
924
if to_entry.parent_id is None:
925
to_path = '' # the root
927
if to_entry.parent_id not in to_paths:
929
return get_to_path(self.target.inventory[to_entry.parent_id])
930
to_path = osutils.pathjoin(to_paths[to_entry.parent_id],
932
to_paths[to_entry.file_id] = to_path
1124
935
for path, from_entry in from_entries_by_dir:
1125
936
file_id = from_entry.file_id
1126
937
if file_id in to_paths:
1127
938
# already returned
1129
if file_id not in self.target.all_file_ids():
940
if not file_id in self.target.all_file_ids():
1130
941
# common case - paths we have not emitted are not present in
1134
to_path = self.target.id2path(file_id)
945
to_path = get_to_path(self.target.inventory[file_id])
1135
946
entry_count += 1
1136
947
if pb is not None:
1137
948
pb.update('comparing files', entry_count, num_entries)
1144
955
executable = (from_executable, None)
1145
956
changed_content = from_kind is not None
1146
957
# the parent's path is necessarily known at this point.
1147
changed_file_ids.append(file_id)
1148
958
yield(file_id, (path, to_path), changed_content, versioned, parent,
1149
959
name, kind, executable)
1150
changed_file_ids = set(changed_file_ids)
1151
if specific_file_ids is not None:
1152
for result in self._handle_precise_ids(precise_file_ids,
1156
def _get_entry(self, tree, file_id):
1157
"""Get an inventory entry from a tree, with missing entries as None.
1159
If the tree raises NotImplementedError on accessing .inventory, then
1160
this is worked around using iter_entries_by_dir on just the file id
1163
:param tree: The tree to lookup the entry in.
1164
:param file_id: The file_id to lookup.
1167
inventory = tree.inventory
1168
except NotImplementedError:
1169
# No inventory available.
1171
iterator = tree.iter_entries_by_dir(specific_file_ids=[file_id])
1172
return iterator.next()[1]
1173
except StopIteration:
1177
return inventory[file_id]
1178
except errors.NoSuchId:
1181
def _handle_precise_ids(self, precise_file_ids, changed_file_ids,
1182
discarded_changes=None):
1183
"""Fill out a partial iter_changes to be consistent.
1185
:param precise_file_ids: The file ids of parents that were seen during
1187
:param changed_file_ids: The file ids of already emitted items.
1188
:param discarded_changes: An optional dict of precalculated
1189
iter_changes items which the partial iter_changes had not output
1191
:return: A generator of iter_changes items to output.
1193
# process parents of things that had changed under the users
1194
# requested paths to prevent incorrect paths or parent ids which
1195
# aren't in the tree.
1196
while precise_file_ids:
1197
precise_file_ids.discard(None)
1198
# Don't emit file_ids twice
1199
precise_file_ids.difference_update(changed_file_ids)
1200
if not precise_file_ids:
1202
# If the there was something at a given output path in source, we
1203
# have to include the entry from source in the delta, or we would
1204
# be putting this entry into a used path.
1206
for parent_id in precise_file_ids:
1208
paths.append(self.target.id2path(parent_id))
1209
except errors.NoSuchId:
1210
# This id has been dragged in from the source by delta
1211
# expansion and isn't present in target at all: we don't
1212
# need to check for path collisions on it.
1215
old_id = self.source.path2id(path)
1216
precise_file_ids.add(old_id)
1217
precise_file_ids.discard(None)
1218
current_ids = precise_file_ids
1219
precise_file_ids = set()
1220
# We have to emit all of precise_file_ids that have been altered.
1221
# We may have to output the children of some of those ids if any
1222
# directories have stopped being directories.
1223
for file_id in current_ids:
1225
if discarded_changes:
1226
result = discarded_changes.get(file_id)
1231
old_entry = self._get_entry(self.source, file_id)
1232
new_entry = self._get_entry(self.target, file_id)
1233
result, changes = self._changes_from_entries(
1234
old_entry, new_entry)
1237
# Get this parents parent to examine.
1238
new_parent_id = result[4][1]
1239
precise_file_ids.add(new_parent_id)
1241
if (result[6][0] == 'directory' and
1242
result[6][1] != 'directory'):
1243
# This stopped being a directory, the old children have
1245
if old_entry is None:
1246
# Reusing a discarded change.
1247
old_entry = self._get_entry(self.source, file_id)
1248
for child in old_entry.children.values():
1249
precise_file_ids.add(child.file_id)
1250
changed_file_ids.add(result[0])
1254
962
class MultiWalker(object):
added
removed
bzrlib/tree.py
