# 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 os, re import functools import typing as T from . import mparser from . import coredata from . import mesonlib from . import compilers forbidden_option_names = set(coredata.builtin_options.keys()) forbidden_prefixes = [lang + '_' for lang in compilers.all_languages] + ['b_', 'backend_'] reserved_prefixes = ['cross_'] def is_invalid_name(name: str, *, log: bool = True) -> bool: if name in forbidden_option_names: return True pref = name.split('_')[0] + '_' if pref in forbidden_prefixes: return True if pref in reserved_prefixes: if log: from . import mlog mlog.deprecation('Option uses prefix "%s", which is reserved for Meson. This will become an error in the future.' % pref) return False class OptionException(mesonlib.MesonException): pass def permitted_kwargs(permitted): """Function that validates kwargs for options.""" def _wraps(func): @functools.wraps(func) def _inner(name, description, kwargs): bad = [a for a in kwargs.keys() if a not in permitted] if bad: raise OptionException('Invalid kwargs for option "{}": "{}"'.format( name, ' '.join(bad))) return func(description, kwargs) return _inner return _wraps optname_regex = re.compile('[^a-zA-Z0-9_-]') @permitted_kwargs({'value', 'yield'}) def StringParser(description, kwargs): return coredata.UserStringOption(description, kwargs.get('value', ''), kwargs.get('choices', []), kwargs.get('yield', coredata.default_yielding)) @permitted_kwargs({'value', 'yield'}) def BooleanParser(description, kwargs): return coredata.UserBooleanOption(description, kwargs.get('value', True), kwargs.get('yield', coredata.default_yielding)) @permitted_kwargs({'value', 'yield', 'choices'}) def ComboParser(description, kwargs): if 'choices' not in kwargs: raise OptionException('Combo option missing "choices" keyword.') choices = kwargs['choices'] if not isinstance(choices, list): raise OptionException('Combo choices must be an array.') for i in choices: if not isinstance(i, str): raise OptionException('Combo choice elements must be strings.') return coredata.UserComboOption(description, choices, kwargs.get('value', choices[0]), kwargs.get('yield', coredata.default_yielding),) @permitted_kwargs({'value', 'min', 'max', 'yield'}) def IntegerParser(description, kwargs): if 'value' not in kwargs: raise OptionException('Integer option must contain value argument.') return coredata.UserIntegerOption(description, kwargs.get('min', None), kwargs.get('max', None), kwargs['value'], kwargs.get('yield', coredata.default_yielding)) # FIXME: Cannot use FeatureNew while parsing options because we parse it before # reading options in project(). See func_project() in interpreter.py #@FeatureNew('array type option()', '0.44.0') @permitted_kwargs({'value', 'yield', 'choices'}) def string_array_parser(description, kwargs): if 'choices' in kwargs: choices = kwargs['choices'] if not isinstance(choices, list): raise OptionException('Array choices must be an array.') for i in choices: if not isinstance(i, str): raise OptionException('Array choice elements must be strings.') value = kwargs.get('value', choices) else: choices = None value = kwargs.get('value', []) if not isinstance(value, list): raise OptionException('Array choices must be passed as an array.') return coredata.UserArrayOption(description, value, choices=choices, yielding=kwargs.get('yield', coredata.default_yielding)) @permitted_kwargs({'value', 'yield'}) def FeatureParser(description, kwargs): return coredata.UserFeatureOption(description, kwargs.get('value', 'auto'), yielding=kwargs.get('yield', coredata.default_yielding)) option_types = {'string': StringParser, 'boolean': BooleanParser, 'combo': ComboParser, 'integer': IntegerParser, 'array': string_array_parser, 'feature': FeatureParser, } # type: T.Dict[str, T.Callable[[str, T.Dict], coredata.UserOption]] class OptionInterpreter: def __init__(self, subproject): self.options = {} self.subproject = subproject def process(self, option_file): try: with open(option_file, 'r', encoding='utf8') as f: ast = mparser.Parser(f.read(), '').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() 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, mparser.BooleanNode, mparser.NumberNode)): return arg.value elif isinstance(arg, mparser.ArrayNode): return [self.reduce_single(curarg) for curarg in arg.args.arguments] 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) # FIXME: Cannot use FeatureNew while parsing options because we parse # it before reading options in project(). See func_project() in # interpreter.py #if 'yield' in kwargs: # FeatureNew('option yield', '0.45.0').use(self.subproject) if 'type' not in kwargs: raise OptionException('Option call missing mandatory "type" keyword argument') opt_type = kwargs.pop('type') if opt_type not 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 is_invalid_name(opt_name): 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.pop('description', ''), kwargs) if opt.description == '': opt.description = opt_name self.options[opt_name] = opt