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# Copyright (C) 2006-2007 Jelmer Vernooij <jelmer@samba.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Branch property access and caching."""
from bzrlib.errors import NoSuchRevision
from bzrlib.trace import mutter
from bzrlib.plugins.svn.core import SubversionException
from bzrlib.plugins.svn.errors import ERR_FS_NO_SUCH_REVISION
class PathPropertyProvider(object):
def __init__(self, log):
self.log = log
def get_properties(self, path, revnum):
"""Obtain all the directory properties set on a path/revnum pair.
:param path: Subversion path
:param revnum: Subversion revision number
:return: Dictionary with properties
"""
assert isinstance(path, str)
path = path.lstrip("/")
try:
(_, _, props) = self.log._transport.get_dir(path,
revnum)
except SubversionException, (_, num):
if num == ERR_FS_NO_SUCH_REVISION:
raise NoSuchRevision(self, revnum)
raise
return props
def get_changed_properties(self, path, revnum):
"""Get the contents of a Subversion file property.
Will use the cache.
:param path: Subversion path.
:param revnum: Subversion revision number.
:return: Contents of property or default if property didn't exist.
"""
assert isinstance(revnum, int)
assert isinstance(path, str)
if not path in self.log.get_revision_paths(revnum):
return {}
current = self.get_properties(path, revnum)
if current == {}:
return {}
(prev_path, prev_revnum) = self.log.get_previous(path, revnum)
if prev_path is None and prev_revnum == -1:
previous = {}
else:
previous = self.get_properties(prev_path.encode("utf-8"),
prev_revnum)
ret = {}
for key, val in current.items():
if previous.get(key) != val:
ret[key] = val
return ret
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