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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 re
import typing as T
from . import coredata
from . import mesonlib
from . import mparser
from . import mlog
from .interpreterbase import FeatureNew, typed_pos_args, typed_kwargs, ContainerTypeInfo, KwargInfo, permittedKwargs
if T.TYPE_CHECKING:
from .interpreterbase import TYPE_var, TYPE_kwargs
from .interpreterbase import SubProject
from typing_extensions import TypedDict
FuncOptionArgs = TypedDict('FuncOptionArgs', {
'type': str,
'description': str,
'yield': bool,
'choices': T.Optional[T.List[str]],
'value': object,
'min': T.Optional[int],
'max': T.Optional[int],
'deprecated': T.Union[bool, str, T.Dict[str, str], T.List[str]],
})
ParserArgs = TypedDict('ParserArgs', {
'yield': bool,
'choices': T.Optional[T.List[str]],
'value': object,
'min': T.Optional[int],
'max': T.Optional[int],
})
class OptionException(mesonlib.MesonException):
pass
optname_regex = re.compile('[^a-zA-Z0-9_-]')
class OptionInterpreter:
def __init__(self, subproject: 'SubProject') -> None:
self.options: 'coredata.MutableKeyedOptionDictType' = {}
self.subproject = subproject
self.option_types = {'string': self.string_parser,
'boolean': self.boolean_parser,
'combo': self.combo_parser,
'integer': self.integer_parser,
'array': self.string_array_parser,
'feature': self.feature_parser,
}
def process(self, option_file: str) -> None:
try:
with open(option_file, encoding='utf-8') as f:
ast = mparser.Parser(f.read(), option_file).parse()
except mesonlib.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()
e.file = option_file
raise e
for cur in ast.lines:
try:
self.current_node = cur
self.evaluate_statement(cur)
except mesonlib.MesonException as e:
e.lineno = cur.lineno
e.colno = cur.colno
e.file = option_file
raise e
except Exception as e:
raise mesonlib.MesonException(
str(e), lineno=cur.lineno, colno=cur.colno, file=option_file)
def reduce_single(self, arg: T.Union[str, mparser.BaseNode]) -> 'TYPE_var':
if isinstance(arg, str):
return arg
elif isinstance(arg, (mparser.StringNode, mparser.BooleanNode,
mparser.NumberNode)):
return arg.value
elif isinstance(arg, mparser.ArrayNode):
return [self.reduce_single(curarg) for curarg in arg.args.arguments]
elif isinstance(arg, mparser.DictNode):
d = {}
for k, v in arg.args.kwargs.items():
if not isinstance(k, mparser.StringNode):
raise OptionException('Dictionary keys must be a string literal')
d[k.value] = self.reduce_single(v)
return d
elif isinstance(arg, mparser.UMinusNode):
res = self.reduce_single(arg.value)
if not isinstance(res, (int, float)):
raise OptionException('Token after "-" is not a number')
FeatureNew.single_use('negative numbers in meson_options.txt', '0.54.1', self.subproject)
return -res
elif isinstance(arg, mparser.NotNode):
res = self.reduce_single(arg.value)
if not isinstance(res, bool):
raise OptionException('Token after "not" is not a a boolean')
FeatureNew.single_use('negation ("not") in meson_options.txt', '0.54.1', self.subproject)
return not res
elif isinstance(arg, mparser.ArithmeticNode):
l = self.reduce_single(arg.left)
r = self.reduce_single(arg.right)
if not (arg.operation == 'add' and isinstance(l, str) and isinstance(r, str)):
raise OptionException('Only string concatenation with the "+" operator is allowed')
FeatureNew.single_use('string concatenation in meson_options.txt', '0.55.0', self.subproject)
return l + r
else:
raise OptionException('Arguments may only be string, int, bool, or array of those.')
def reduce_arguments(self, args: mparser.ArgumentNode) -> T.Tuple['TYPE_var', 'TYPE_kwargs']:
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, mparser.IdNode):
raise OptionException('Keyword argument name is not a string.')
a = args.kwargs[key]
reduced_kw[key.value] = self.reduce_single(a)
return reduced_pos, reduced_kw
def evaluate_statement(self, node: mparser.BaseNode) -> None:
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)
self.func_option(posargs, kwargs)
@typed_kwargs('option',
KwargInfo('type', str, required=True),
KwargInfo('description', str, default=''),
KwargInfo('yield', bool, default=coredata.default_yielding, since='0.45.0'),
KwargInfo('choices', (ContainerTypeInfo(list, str), type(None))),
KwargInfo('value', object),
KwargInfo('min', (int, type(None))),
KwargInfo('max', (int, type(None))),
KwargInfo('deprecated', (bool, str, ContainerTypeInfo(dict, str), ContainerTypeInfo(list, str)),
default=False, since='0.60.0')
)
@typed_pos_args('option', str)
def func_option(self, args: T.Tuple[str], kwargs: 'FuncOptionArgs') -> None:
opt_name = args[0]
if optname_regex.search(opt_name) is not None:
raise OptionException('Option names can only contain letters, numbers or dashes.')
key = mesonlib.OptionKey.from_string(opt_name).evolve(subproject=self.subproject)
if not key.is_project():
raise OptionException('Option name %s is reserved.' % opt_name)
opt_type = kwargs['type']
parser = self.option_types.get(opt_type)
if not parser:
raise OptionException(f'Unknown type {opt_type}.')
description = kwargs['description'] or opt_name
# Only keep in kwargs arguments that are used by option type's parser
# because they use @permittedKwargs().
known_parser_kwargs = {'value', 'choices', 'yield', 'min', 'max'}
parser_kwargs = {k: v for k, v in kwargs.items() if k in known_parser_kwargs and v is not None}
opt = parser(description, T.cast('ParserArgs', parser_kwargs))
opt.deprecated = kwargs['deprecated']
if isinstance(opt.deprecated, str):
FeatureNew.single_use('String value to "deprecated" keyword argument', '0.63.0', self.subproject)
if key in self.options:
mlog.deprecation(f'Option {opt_name} already exists.')
self.options[key] = opt
@permittedKwargs({'value', 'yield'})
def string_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
value = kwargs.get('value', '')
return coredata.UserStringOption(description, value, kwargs['yield'])
@permittedKwargs({'value', 'yield'})
def boolean_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
value = kwargs.get('value', True)
return coredata.UserBooleanOption(description, value, kwargs['yield'])
@permittedKwargs({'value', 'yield', 'choices'})
def combo_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
choices = kwargs.get('choices')
if not choices:
raise OptionException('Combo option missing "choices" keyword.')
value = kwargs.get('value', choices[0])
return coredata.UserComboOption(description, choices, value, kwargs['yield'])
@permittedKwargs({'value', 'min', 'max', 'yield'})
def integer_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
value = kwargs.get('value')
if value is None:
raise OptionException('Integer option must contain value argument.')
inttuple = (kwargs.get('min'), kwargs.get('max'), value)
return coredata.UserIntegerOption(description, inttuple, kwargs['yield'])
@permittedKwargs({'value', 'yield', 'choices'})
def string_array_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
choices = kwargs.get('choices', [])
value = kwargs.get('value', choices)
if not isinstance(value, list):
raise OptionException('Array choices must be passed as an array.')
return coredata.UserArrayOption(description, value,
choices=choices,
yielding=kwargs['yield'])
@permittedKwargs({'value', 'yield'})
def feature_parser(self, description: str, kwargs: 'ParserArgs') -> coredata.UserOption:
value = kwargs.get('value', 'auto')
return coredata.UserFeatureOption(description, value, kwargs['yield'])
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