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#!/usr/bin/env python3
#
# Copyright (C) 2017 Codethink Limited
#
# 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:
# Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
import os
from .optionenum import OptionEnum
# OptionArch
#
# An enumeration project option which does not allow
# definition of a default value, but instead tries to set
# the default value to the machine architecture introspected
# using `uname`
#
# Note that when using OptionArch in a project, it will automatically
# bail out of the host machine `uname` reports a machine architecture
# not supported by the project, in the case that no option was
# specifically specified
#
class OptionArch(OptionEnum):
OPTION_TYPE = 'arch'
def load(self, node):
super(OptionArch, self).load(node, allow_default_definition=False)
def load_default_value(self, node):
_, _, _, _, machine_arch = os.uname()
return machine_arch
def resolve(self):
# Validate that the default machine arch reported by uname() is
# explicitly supported by the project, only if it was not
# overridden by user configuration or cli.
#
# If the value is specified on the cli or user configuration,
# then it will already be valid.
#
self.validate(self.value)
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