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#
# 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>
from .._exceptions import LoadError, LoadErrorReason, PlatformError
from .._platform import Platform
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().load_special(node, allow_default_definition=False)
def load_default_value(self, node):
arch = Platform.get_host_arch()
default_value = None
for index, value in enumerate(self.values):
try:
canonical_value = Platform.canonicalize_arch(value)
if default_value is None and canonical_value == arch:
default_value = value
# Do not terminate the loop early to ensure we validate
# all values in the list.
except PlatformError as e:
provenance = node.get_sequence('values').scalar_at(index).get_provenance()
prefix = ""
if provenance:
prefix = "{}: ".format(provenance)
raise LoadError(LoadErrorReason.INVALID_DATA,
"{}Invalid value for {} option '{}': {}"
.format(prefix, self.OPTION_TYPE, self.name, e))
if default_value is None:
# Host architecture is not supported by the project.
# Do not raise an error here as the user may override it.
# If the user does not override it, an error will be raised
# by resolve()/validate().
default_value = arch
return default_value
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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