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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from vicn.core.attribute import Reference
from vicn.core.resource import Resource, EmptyResource
from vicn.resource.application import Application
from vicn.resource.linux.package_manager import Packages
class LinuxApplication(Application):
"""
Resource: Linux Application
This resource ensures that the application is present on the system, and
installs it during setup if necessary.
"""
def __subresources__(self):
package_names = self._get_package_names()
if package_names:
packages = Packages(node=Reference(self, 'node'),
names=package_names,
owner=self)
else:
packages = EmptyResource()
process = None
return packages > process
#--------------------------------------------------------------------------
# Private methods
#--------------------------------------------------------------------------
def _get_package_names(self):
package_names = list()
for base in self.__class__.mro():
if not '__package_names__' in vars(base):
continue
package_names.extend(getattr(base, '__package_names__'))
return package_names
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