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# -*- encoding: utf-8 -*-
# Software Management Providers
#
# Copyright (C) 2012-2013 Red Hat, Inc. All rights reserved.
#
# This library 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.
#
# This library 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 this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Authors: Michal Minar <miminar@redhat.com>
"""
Pylint plugin supressing error concerning the use of cmpi_logging
facilities.
"""
from logilab.astng import scoped_nodes
from logilab.astng import MANAGER
from logilab.astng.builder import ASTNGBuilder
from pylint.interfaces import IASTNGChecker
from pylint.checkers import BaseChecker
def logging_transform(module):
"""
Make the logging.RootLogger look, like it has following methods:
* trace_warn
* trace_info
* trace_verbose
These are actually defined in its subclass CMPILogger.
But pylint thinks, that RootLogger is used all the time.
"""
if module.name != 'logging' or 'RootLogger' not in module:
return
fake = ASTNGBuilder(MANAGER).string_build('''
def trace_warn(self, msg, *args, **kwargs):
print(self, msg, args, kwargs)
def trace_info(self, msg, *args, **kwargs):
print(self, msg, args, kwargs)
def trace_verbose(self, msg, *args, **kwargs):
print(self, msg, args, kwargs)
''')
for level in ('warn', 'info', 'verbose'):
method_name = 'trace_' + level
for child in module.locals['RootLogger']:
if not isinstance(child, scoped_nodes.Class):
continue
child.locals[method_name] = fake.locals[method_name]
class CMPILoggingChecker(BaseChecker):
"""
Checker that only disables some error messages of our custom
cmpi_logging facilities.
"""
__implements__ = IASTNGChecker
name = 'cmpi_logging'
# When we do have some real warning messages/reports,
# remote W9921. We need it just to get registered.
msgs = { 'W9921': ('Dummy', "This is a dummy message.")}
def visit_class(self, node):
"""
This supresses some warnings for CMPILogger class.
"""
if ( isinstance(node.parent, scoped_nodes.Module)
and node.parent.name.split('.')[-1] == "cmpi_logging"
and node.name == "CMPILogger"):
# supress warning about too many methods defined
self.linter.disable('R0904', scope='module', line=node.lineno)
def register(linter):
"""
Called when loaded by pylint --load-plugins.
Let's register our tranformation function and checker here.
"""
MANAGER.register_transformer(logging_transform)
linter.register_checker(CMPILoggingChecker(linter))
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