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# -*- coding: utf-8 -*-
# GNU Guix --- Functional package management for GNU
# Copyright © 2021 Lars-Dominik Braun <lars@6xq.net>
#
# This file is part of GNU Guix.
#
# GNU Guix 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.
#
# GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
from __future__ import print_function # Python 2 support.
import importlib
import pkg_resources
import sys
import traceback
try:
from importlib.machinery import PathFinder
except ImportError:
PathFinder = None
ret = 0
# Only check site-packages installed by this package, but not dependencies
# (which pkg_resources.working_set would include). Path supplied via argv.
ws = pkg_resources.find_distributions(sys.argv[1])
for dist in ws:
print('validating', repr(dist.project_name), dist.location)
try:
print('...checking requirements: ', end='')
req = str(dist.as_requirement())
# dist.activate() is not enough to actually check requirements, we
# have to .require() it.
pkg_resources.require(req)
print('OK')
except Exception as e:
print('ERROR:', req, repr(e))
ret = 1
continue
# Try to load top level modules. This should not have any side-effects.
try:
metalines = dist.get_metadata_lines('top_level.txt')
except (KeyError, EnvironmentError):
# distutils (i.e. #:use-setuptools? #f) will not install any metadata.
# This file is also missing for packages built using a PEP 517 builder
# such as poetry.
print('WARNING: cannot determine top-level modules')
continue
for name in metalines:
# Only available on Python 3.
if PathFinder and PathFinder.find_spec(name) is None:
# Ignore unavailable modules, often C modules, which were not
# installed at the top-level. Cannot use ModuleNotFoundError,
# because it is raised by failed imports too.
continue
try:
print('...trying to load module', name, end=': ')
importlib.import_module(name)
print('OK')
except Exception:
print('ERROR:')
traceback.print_exc(file=sys.stdout)
ret = 1
# Try to load entry points of console scripts too, making sure they
# work. They should be removed if they don't. Other groups may not be
# safe, as they can depend on optional packages.
for group, v in dist.get_entry_map().items():
if group not in {'console_scripts', 'gui_scripts'}:
continue
for name, ep in v.items():
try:
print('...trying to load endpoint', group, name, end=': ')
ep.load()
print('OK')
except Exception:
print('ERROR:')
traceback.print_exc(file=sys.stdout)
ret = 1
sys.exit(ret)
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