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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>
from .. import _yaml
from .._exceptions import LoadError, LoadErrorReason
from .option import Option, OPTION_SYMBOLS
# OptionFlags
#
# A flags project option
#
class OptionFlags(Option):
OPTION_TYPE = 'flags'
def load(self, node, allow_value_definitions=True):
super(OptionFlags, self).load(node)
valid_symbols = OPTION_SYMBOLS + ['default']
if allow_value_definitions:
valid_symbols += ['values']
_yaml.node_validate(node, valid_symbols)
# Allow subclass to define the valid values
self.values = self.load_valid_values(node)
if not self.values:
raise LoadError(LoadErrorReason.INVALID_DATA,
"{}: No values specified for {} option '{}'"
.format(_yaml.node_get_provenance(node), self.OPTION_TYPE, self.name))
self.value = _yaml.node_get(node, list, 'default', default_value=[])
self.validate(self.value, _yaml.node_get_provenance(node, 'default'))
def load_value(self, node):
self.value = _yaml.node_get(node, list, self.name)
self.value = sorted(self.value)
self.validate(self.value, _yaml.node_get_provenance(node, self.name))
def set_value(self, value):
# Strip out all whitespace, allowing: "value1, value2 , value3"
stripped = "".join(value.split())
# Get the comma separated values
list_value = stripped.split(',')
self.validate(list_value)
self.value = sorted(list_value)
def get_value(self):
return ",".join(self.value)
def validate(self, value, provenance=None):
for flag in value:
if flag not in self.values:
prefix = ""
if provenance:
prefix = "{}: ".format(provenance)
raise LoadError(LoadErrorReason.INVALID_DATA,
"{}Invalid value for flags option '{}': {}\n"
.format(prefix, self.name, value) +
"Valid values: {}".format(", ".join(self.values)))
def load_valid_values(self, node):
# Allow the more descriptive error to raise when no values
# exist rather than bailing out here (by specifying default_value)
return _yaml.node_get(node, list, 'values', default_value=[])
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