| # |
| # 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, PlatformError |
| from ..exceptions import LoadErrorReason |
| 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( |
| "{}Invalid value for {} option '{}': {}".format(prefix, self.OPTION_TYPE, self.name, e), |
| LoadErrorReason.INVALID_DATA, |
| ) |
| |
| 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) |