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# Copyright 2013-2014 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import mparser
import coredata
import os, re
forbidden_option_names = coredata.builtin_options
class OptionException(coredata.MesonException):
pass
optname_regex = re.compile('[^a-zA-Z0-9_-]')
class UserOption:
def __init__(self, name, kwargs):
super().__init__()
self.description = kwargs.get('description', '')
self.name = name
def parse_string(self, valuestring):
return valuestring
class UserStringOption(UserOption):
def __init__(self, name, kwargs):
super().__init__(name, kwargs)
self.set_value(kwargs.get('value', ''))
def set_value(self, newvalue):
if not isinstance(newvalue, str):
raise OptionException('Value "%s" for string option "%s" is not a string.' % (str(newvalue), self.name))
self.value = newvalue
class UserBooleanOption(UserOption):
def __init__(self, name, kwargs):
super().__init__(name, kwargs)
self.set_value(kwargs.get('value', 'true'))
def set_value(self, newvalue):
if not isinstance(newvalue, bool):
raise OptionException('Value "%s" for boolean option "%s" is not a boolean.' % (str(newvalue), self.name))
self.value = newvalue
def parse_string(self, valuestring):
if valuestring == 'false':
return False
if valuestring == 'true':
return True
raise OptionException('Value "%s" for boolean option "%s" is not a boolean.' % (valuestring, self.name))
class UserComboOption(UserOption):
def __init__(self, name, kwargs):
super().__init__(name, kwargs)
if 'choices' not in kwargs:
raise OptionException('Combo option missing "choices" keyword.')
self.choices = kwargs['choices']
if not isinstance(self.choices, list):
raise OptionException('Combo choices must be an array.')
for i in self.choices:
if not isinstance(i, str):
raise OptionException('Combo choice elements must be strings.')
self.value = kwargs.get('value', self.choices[0])
def set_value(self, newvalue):
if newvalue not in self.choices:
optionsstring = ', '.join(['"%s"' % (item,) for item in self.choices])
raise OptionException('Value "%s" for combo option "%s" is not one of the choices. Possible choices are: %s.' % (newvalue, self.name, optionsstring))
self.value = newvalue
option_types = {'string' : UserStringOption,
'boolean' : UserBooleanOption,
'combo' : UserComboOption,
}
class OptionInterpreter:
def __init__(self, subproject, command_line_options):
self.options = {}
self.subproject = subproject
self.cmd_line_options = {}
for o in command_line_options:
(key, value) = o.split('=', 1)
self.cmd_line_options[key] = value
def process(self, option_file):
try:
ast = mparser.Parser(open(option_file, 'r').read()).parse()
except coredata.MesonException as me:
me.file = option_file
raise me
if not isinstance(ast, mparser.CodeBlockNode):
e = OptionException('Option file is malformed.')
e.lineno = ast.lineno()
raise e
for cur in ast.lines:
try:
self.evaluate_statement(cur)
except Exception as e:
e.lineno = cur.lineno
e.colno = cur.colno
e.file = os.path.join('meson_options.txt')
raise e
def reduce_single(self, arg):
if isinstance(arg, str):
return arg
elif isinstance(arg, mparser.StringNode):
return arg.value
elif isinstance(arg, mparser.BooleanNode):
return arg.value
elif isinstance(arg, mparser.ArrayNode):
return [self.reduce_single(curarg) for curarg in arg.args.arguments]
elif isinstance(arg, mparser.NumberNode):
return arg.get_value()
else:
raise OptionException('Arguments may only be string, int, bool, or array of those.')
def reduce_arguments(self, args):
assert(isinstance(args, mparser.ArgumentNode))
if args.incorrect_order():
raise OptionException('All keyword arguments must be after positional arguments.')
reduced_pos = [self.reduce_single(arg) for arg in args.arguments]
reduced_kw = {}
for key in args.kwargs.keys():
if not isinstance(key, str):
raise OptionException('Keyword argument name is not a string.')
a = args.kwargs[key]
reduced_kw[key] = self.reduce_single(a)
return (reduced_pos, reduced_kw)
def evaluate_statement(self, node):
if not isinstance(node, mparser.FunctionNode):
raise OptionException('Option file may only contain option definitions')
func_name = node.func_name
if func_name != 'option':
raise OptionException('Only calls to option() are allowed in option files.')
(posargs, kwargs) = self.reduce_arguments(node.args)
if 'type' not in kwargs:
raise OptionException('Option call missing mandatory "type" keyword argument')
opt_type = kwargs['type']
if not opt_type in option_types:
raise OptionException('Unknown type %s.' % opt_type)
if len(posargs) != 1:
raise OptionException('Option() must have one (and only one) positional argument')
opt_name = posargs[0]
if not isinstance(opt_name, str):
raise OptionException('Positional argument must be a string.')
if optname_regex.search(opt_name) is not None:
raise OptionException('Option names can only contain letters, numbers or dashes.')
if opt_name in forbidden_option_names:
raise OptionException('Option name %s is reserved.' % opt_name)
if self.subproject != '':
opt_name = self.subproject + ':' + opt_name
opt = option_types[opt_type](opt_name, kwargs)
if opt.description == '':
opt.description = opt_name
if opt_name in self.cmd_line_options:
opt.set_value(opt.parse_string(self.cmd_line_options[opt_name]))
self.options[opt_name] = opt
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