[datafeed parser] only update an entity attributes when needed. Closes #1989142
This may avoid error with some entities which have immutable attributes
and don't check something actually changed.
Also, avoid modifying the cached item representation, this may cause pb
when an item is seen several times during an import.
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""pre 3.6 bw compat"""
# pylint: disable=W0614,W0401
from warnings import warn
warn('moved to cubicweb.mttransforms', DeprecationWarning, stacklevel=2)
from cubicweb.mttransforms import *