Source code for meta_package_manager.platform

# -*- coding: utf-8 -*-
#
# Copyright (c) 2016 Kevin Deldycke <kevin@deldycke.com>
#                    and contributors.
# All Rights Reserved.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

""" Helpers and utilities to handle platform idiosyncracies. """

from __future__ import (
    absolute_import,
    division,
    print_function,
    unicode_literals
)

import sys

from . import logger

# Python version constants.
PY_VERSION = sys.version_info
PY2 = PY_VERSION[0] == 2
PY3 = PY_VERSION[0] == 3


# OS identification constants.
MACOS = 'macos'
LINUX = 'linux'
WINDOWS = 'windows'


[docs]def is_linux(): """ Return True only if current platform is Linux. """ return sys.platform.startswith('linux')
[docs]def is_macos(): """ Return True only if current platform is macOS. """ return sys.platform == 'darwin'
[docs]def is_windows(): """ Return True only if current platform is Windows. """ return sys.platform in ['win32', 'cygwin']
# Map OS IDs to evaluation function and OS labels. OS_DEFINITIONS = { MACOS: ('macOS', is_macos), LINUX: ('Linux', is_linux), WINDOWS: ('Windows', is_windows)}
[docs]def current_os(): """ Return ID and label of current OS. """ platform_id = sys.platform logger.debug("Raw platform ID: {}.".format(platform_id)) for os_id, (os_label, eval_func) in OS_DEFINITIONS.items(): if eval_func(): return os_id, os_label raise SystemError("Unrecognized {} platform.".format(platform_id))
[docs]def os_label(os_id): """ Return platform label for user-friendly output. """ return OS_DEFINITIONS[os_id][0]