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#
# Copyright (C) 2019 Bloomberg Finance LP
#
# This program 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 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, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Angelos Evripiotis <jevripiotis@bloomberg.net>
import collections
from contextlib import contextmanager
import platform
# override_platform_uname()
#
# Context manager to override the reported value of `platform.uname()`.
#
# Args:
# system (str): Optional str to replace the 1st entry of uname with.
# machine (str): Optional str to replace the 5th entry of uname with.
#
@contextmanager
def override_platform_uname(*, system=None, machine=None):
orig_func = platform.uname
orig_system, node, release, version, orig_machine, processor = platform.uname()
system = system or orig_system
machine = machine or orig_machine
def override_func():
# NOTE:
# 1. We can't use `_replace` here because of this bug in
# Python 3.9.0 - https://bugs.python.org/issue42163.
# 2. We need to create a new subclass because the constructor of
# `platform.uname_result` doesn't share the same interface between
# Python 3.8 and 3.9.
uname_result = collections.namedtuple("uname_result", "system node release version machine processor")
return uname_result(system, node, release, version, machine, processor)
platform.uname = override_func
try:
yield
finally:
platform.uname = orig_func
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