Source code for tendril.utils.versions
#!/usr/bin/env python
# encoding: utf-8
# Copyright (C) 2016-2019 Chintalagiri Shashank
#
# This file is part of tendril.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Collation Package Versions Module (:mod:`tendril.utils.versions`)
=================================================================
This module provides reusable infrastructure used for managing the landscape
and version information of the tendril namespace package collation.
TODO Describe Architecture and Usage somewhere
"""
from __future__ import print_function
import os
import pkg_resources
import pkgutil
import importlib
[docs]def get_namespace_package_names(namespace):
ns_module = importlib.import_module(namespace)
for _, name, _ in pkgutil.iter_modules(ns_module.__path__,
ns_module.__name__ + '.'):
yield name
[docs]def _namespace_primary_location(namespace, fpath):
while os.path.split(fpath)[1] != namespace.split('.')[-1]:
fpath = os.path.split(fpath)[0]
return fpath
[docs]def get_namespace_package_locations(namespace):
ns_package_names = get_namespace_package_names(namespace)
ns_package_files = [pkgutil.get_loader(name).get_filename()
for name in ns_package_names]
ns_package_locations = set([_namespace_primary_location(namespace, f)
for f in ns_package_files])
return ns_package_locations
[docs]def get_version(package):
try:
return pkg_resources.get_distribution(package).version
except pkg_resources.DistributionNotFound:
return 'Not Installed'
[docs]def get_versions(prefix):
return sorted([(d.project_name, d.version)
for d in pkg_resources.working_set
if d.project_name.startswith(prefix)],
key=lambda x: x[0])
[docs]class FeatureUnavailable(Exception):
def __init__(self, feature=None, provider=None):
self._feature = feature
self._provider = provider
def __repr__(self):
return "<FeatureUnavailable {0}>\nThis feature might be provided by " \
"{1}.".format(self._feature, self._provider)
[docs]def main():
print(' {0:34} : {1}'.format('Tendril Version',
get_version('tendril-framework')))
print(' Installed Components : ')
for package, version in get_versions('tendril'):
print(' {0:32} : {1}'.format(package, version))
if __name__ == '__main__':
main()