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Location: kallithea/rhodecode/lib/paster_commands/cache_keys.py

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Mads Kiilerich

follow Python conventions for boolean values

True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.

If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.

# -*- coding: utf-8 -*-
"""
    rhodecode.lib.paster_commands.cache_keys
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    cleanup-keys paster command for RhodeCode


    :created_on: mar 27, 2013
    :author: marcink
    :copyright: (C) 2010-2013 Marcin Kuzminski <marcin@python-works.com>
    :license: GPLv3, see COPYING for more details.
"""
# 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, see <http://www.gnu.org/licenses/>.
from __future__ import with_statement

import os
import sys
import logging

from os.path import dirname as dn, join as jn
from rhodecode.model.meta import Session
#to get the rhodecode import
rc_path = dn(dn(dn(os.path.realpath(__file__))))
sys.path.append(rc_path)
from rhodecode.lib.utils import BasePasterCommand

from rhodecode.model.db import CacheInvalidation


log = logging.getLogger(__name__)


class Command(BasePasterCommand):

    max_args = 1
    min_args = 1

    usage = "CONFIG_FILE"
    group_name = "RhodeCode"
    takes_config_file = -1
    parser = BasePasterCommand.standard_parser(verbose=True)
    summary = "Cache keys utils"

    def command(self):
        #get SqlAlchemy session
        self._init_session()
        _caches = CacheInvalidation.query().order_by(CacheInvalidation.cache_key).all()
        if self.options.show:
            for c_obj in _caches:
                print 'key:%s active:%s' % (c_obj.cache_key, c_obj.cache_active)
        elif self.options.cleanup:
            for c_obj in _caches:
                Session().delete(c_obj)
                print 'removing key:%s' % (c_obj.cache_key)
            Session().commit()
        else:
            print 'nothing done exiting...'
        sys.exit(0)

    def update_parser(self):
        self.parser.add_option(
            '--show',
            action='store_true',
            dest='show',
            help=("show existing cache keys with together with status")
        )

        self.parser.add_option(
            '--cleanup',
            action="store_true",
            dest="cleanup",
            help="cleanup existing cache keys"
        )