The Meson Build System http://mesonbuild.com/
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# Copyright 2018 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.
# This class contains the basic functionality needed to run any interpreter
# or an interpreter-based tool
from __future__ import annotations
import argparse
import copy
import os
import typing as T
from .. import compilers, environment, mesonlib, optinterpreter
from .. import coredata as cdata
from ..build import Executable, Jar, SharedLibrary, SharedModule, StaticLibrary
from ..compilers import detect_compiler_for
from ..interpreterbase import InvalidArguments
from ..mesonlib import MachineChoice, OptionKey
from ..mparser import BaseNode, ArithmeticNode, ArrayNode, ElementaryNode, IdNode, FunctionNode, StringNode
from .interpreter import AstInterpreter
if T.TYPE_CHECKING:
from ..build import BuildTarget
from ..interpreterbase import TYPE_nvar
from .visitor import AstVisitor
# TODO: it would be nice to not have to duplicate this
BUILD_TARGET_FUNCTIONS = [
'executable', 'jar', 'library', 'shared_library', 'shared_module',
'static_library', 'both_libraries'
]
class IntrospectionHelper(argparse.Namespace):
# mimic an argparse namespace
def __init__(self, cross_file: str):
super().__init__()
self.cross_file = cross_file # type: str
self.native_file = None # type: str
self.cmd_line_options = {} # type: T.Dict[str, str]
def __eq__(self, other: object) -> bool:
return NotImplemented
class IntrospectionInterpreter(AstInterpreter):
# Interpreter to detect the options without a build directory
# Most of the code is stolen from interpreter.Interpreter
def __init__(self,
source_root: str,
subdir: str,
backend: str,
visitors: T.Optional[T.List[AstVisitor]] = None,
cross_file: T.Optional[str] = None,
subproject: str = '',
subproject_dir: str = 'subprojects',
env: T.Optional[environment.Environment] = None):
visitors = visitors if visitors is not None else []
super().__init__(source_root, subdir, subproject, visitors=visitors)
options = IntrospectionHelper(cross_file)
self.cross_file = cross_file
if env is None:
self.environment = environment.Environment(source_root, None, options)
else:
self.environment = env
self.subproject_dir = subproject_dir
self.coredata = self.environment.get_coredata()
self.backend = backend
self.default_options = {OptionKey('backend'): self.backend}
self.project_data = {} # type: T.Dict[str, T.Any]
self.targets = [] # type: T.List[T.Dict[str, T.Any]]
self.dependencies = [] # type: T.List[T.Dict[str, T.Any]]
self.project_node = None # type: BaseNode
self.funcs.update({
'add_languages': self.func_add_languages,
'dependency': self.func_dependency,
'executable': self.func_executable,
'jar': self.func_jar,
'library': self.func_library,
'project': self.func_project,
'shared_library': self.func_shared_lib,
'shared_module': self.func_shared_module,
'static_library': self.func_static_lib,
'both_libraries': self.func_both_lib,
})
def func_project(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> None:
if self.project_node:
raise InvalidArguments('Second call to project()')
self.project_node = node
if len(args) < 1:
raise InvalidArguments('Not enough arguments to project(). Needs at least the project name.')
proj_name = args[0]
proj_vers = kwargs.get('version', 'undefined')
proj_langs = self.flatten_args(args[1:])
if isinstance(proj_vers, ElementaryNode):
proj_vers = proj_vers.value
if not isinstance(proj_vers, str):
proj_vers = 'undefined'
self.project_data = {'descriptive_name': proj_name, 'version': proj_vers}
optfile = os.path.join(self.source_root, self.subdir, 'meson.options')
if not os.path.exists(optfile):
optfile = os.path.join(self.source_root, self.subdir, 'meson_options.txt')
if os.path.exists(optfile):
oi = optinterpreter.OptionInterpreter(self.subproject)
oi.process(optfile)
self.coredata.update_project_options(oi.options)
def_opts = self.flatten_args(kwargs.get('default_options', []))
_project_default_options = mesonlib.stringlistify(def_opts)
self.project_default_options = cdata.create_options_dict(_project_default_options, self.subproject)
self.default_options.update(self.project_default_options)
self.coredata.set_default_options(self.default_options, self.subproject, self.environment)
if not self.is_subproject() and 'subproject_dir' in kwargs:
spdirname = kwargs['subproject_dir']
if isinstance(spdirname, StringNode):
assert isinstance(spdirname.value, str)
self.subproject_dir = spdirname.value
if not self.is_subproject():
self.project_data['subprojects'] = []
subprojects_dir = os.path.join(self.source_root, self.subproject_dir)
if os.path.isdir(subprojects_dir):
for i in os.listdir(subprojects_dir):
if os.path.isdir(os.path.join(subprojects_dir, i)):
self.do_subproject(i)
self.coredata.init_backend_options(self.backend)
options = {k: v for k, v in self.environment.options.items() if k.is_backend()}
self.coredata.set_options(options)
self._add_languages(proj_langs, True, MachineChoice.HOST)
self._add_languages(proj_langs, True, MachineChoice.BUILD)
def do_subproject(self, dirname: str) -> None:
subproject_dir_abs = os.path.join(self.environment.get_source_dir(), self.subproject_dir)
subpr = os.path.join(subproject_dir_abs, dirname)
try:
subi = IntrospectionInterpreter(subpr, '', self.backend, cross_file=self.cross_file, subproject=dirname, subproject_dir=self.subproject_dir, env=self.environment, visitors=self.visitors)
subi.analyze()
subi.project_data['name'] = dirname
self.project_data['subprojects'] += [subi.project_data]
except (mesonlib.MesonException, RuntimeError):
return
def func_add_languages(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> None:
kwargs = self.flatten_kwargs(kwargs)
required = kwargs.get('required', True)
if isinstance(required, cdata.UserFeatureOption):
required = required.is_enabled()
if 'native' in kwargs:
native = kwargs.get('native', False)
self._add_languages(args, required, MachineChoice.BUILD if native else MachineChoice.HOST)
else:
for for_machine in [MachineChoice.BUILD, MachineChoice.HOST]:
self._add_languages(args, required, for_machine)
def _add_languages(self, raw_langs: T.List[TYPE_nvar], required: bool, for_machine: MachineChoice) -> None:
langs = [] # type: T.List[str]
for l in self.flatten_args(raw_langs):
if isinstance(l, str):
langs.append(l)
elif isinstance(l, StringNode):
langs.append(l.value)
for lang in sorted(langs, key=compilers.sort_clink):
lang = lang.lower()
if lang not in self.coredata.compilers[for_machine]:
try:
comp = detect_compiler_for(self.environment, lang, for_machine, True)
except mesonlib.MesonException:
# do we even care about introspecting this language?
if required:
raise
else:
continue
if self.subproject:
options = {}
for k in comp.get_options():
v = copy.copy(self.coredata.options[k])
k = k.evolve(subproject=self.subproject)
options[k] = v
self.coredata.add_compiler_options(options, lang, for_machine, self.environment)
def func_dependency(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> None:
args = self.flatten_args(args)
kwargs = self.flatten_kwargs(kwargs)
if not args:
return
name = args[0]
has_fallback = 'fallback' in kwargs
required = kwargs.get('required', True)
version = kwargs.get('version', [])
if not isinstance(version, list):
version = [version]
if isinstance(required, ElementaryNode):
required = required.value
if not isinstance(required, bool):
required = False
self.dependencies += [{
'name': name,
'required': required,
'version': version,
'has_fallback': has_fallback,
'conditional': node.condition_level > 0,
'node': node
}]
def build_target(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs_raw: T.Dict[str, TYPE_nvar], targetclass: T.Type[BuildTarget]) -> T.Optional[T.Dict[str, T.Any]]:
args = self.flatten_args(args)
if not args or not isinstance(args[0], str):
return None
name = args[0]
srcqueue = [node]
extra_queue = []
# Process the sources BEFORE flattening the kwargs, to preserve the original nodes
if 'sources' in kwargs_raw:
srcqueue += mesonlib.listify(kwargs_raw['sources'])
if 'extra_files' in kwargs_raw:
extra_queue += mesonlib.listify(kwargs_raw['extra_files'])
kwargs = self.flatten_kwargs(kwargs_raw, True)
def traverse_nodes(inqueue: T.List[BaseNode]) -> T.List[BaseNode]:
res = [] # type: T.List[BaseNode]
while inqueue:
curr = inqueue.pop(0)
arg_node = None
assert isinstance(curr, BaseNode)
if isinstance(curr, FunctionNode):
arg_node = curr.args
elif isinstance(curr, ArrayNode):
arg_node = curr.args
elif isinstance(curr, IdNode):
# Try to resolve the ID and append the node to the queue
assert isinstance(curr.value, str)
var_name = curr.value
if var_name in self.assignments:
tmp_node = self.assignments[var_name]
if isinstance(tmp_node, (ArrayNode, IdNode, FunctionNode)):
inqueue += [tmp_node]
elif isinstance(curr, ArithmeticNode):
inqueue += [curr.left, curr.right]
if arg_node is None:
continue
arg_nodes = arg_node.arguments.copy()
# Pop the first element if the function is a build target function
if isinstance(curr, FunctionNode) and curr.func_name in BUILD_TARGET_FUNCTIONS:
arg_nodes.pop(0)
elementary_nodes = [x for x in arg_nodes if isinstance(x, (str, StringNode))]
inqueue += [x for x in arg_nodes if isinstance(x, (FunctionNode, ArrayNode, IdNode, ArithmeticNode))]
if elementary_nodes:
res += [curr]
return res
source_nodes = traverse_nodes(srcqueue)
extraf_nodes = traverse_nodes(extra_queue)
# Make sure nothing can crash when creating the build class
kwargs_reduced = {k: v for k, v in kwargs.items() if k in targetclass.known_kwargs and k in {'install', 'build_by_default', 'build_always'}}
kwargs_reduced = {k: v.value if isinstance(v, ElementaryNode) else v for k, v in kwargs_reduced.items()}
kwargs_reduced = {k: v for k, v in kwargs_reduced.items() if not isinstance(v, BaseNode)}
for_machine = MachineChoice.HOST
objects = [] # type: T.List[T.Any]
empty_sources = [] # type: T.List[T.Any]
# Passing the unresolved sources list causes errors
kwargs_reduced['_allow_no_sources'] = True
target = targetclass(name, self.subdir, self.subproject, for_machine, empty_sources, [], objects,
self.environment, self.coredata.compilers[for_machine], kwargs_reduced)
target.process_compilers()
target.process_compilers_late([])
new_target = {
'name': target.get_basename(),
'id': target.get_id(),
'type': target.get_typename(),
'defined_in': os.path.normpath(os.path.join(self.source_root, self.subdir, environment.build_filename)),
'subdir': self.subdir,
'build_by_default': target.build_by_default,
'installed': target.should_install(),
'outputs': target.get_outputs(),
'sources': source_nodes,
'extra_files': extraf_nodes,
'kwargs': kwargs,
'node': node,
}
self.targets += [new_target]
return new_target
def build_library(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
default_library = self.coredata.get_option(OptionKey('default_library'))
if default_library == 'shared':
return self.build_target(node, args, kwargs, SharedLibrary)
elif default_library == 'static':
return self.build_target(node, args, kwargs, StaticLibrary)
elif default_library == 'both':
return self.build_target(node, args, kwargs, SharedLibrary)
return None
def func_executable(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, Executable)
def func_static_lib(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, StaticLibrary)
def func_shared_lib(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, SharedLibrary)
def func_both_lib(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, SharedLibrary)
def func_shared_module(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, SharedModule)
def func_library(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_library(node, args, kwargs)
def func_jar(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
return self.build_target(node, args, kwargs, Jar)
def func_build_target(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> T.Optional[T.Dict[str, T.Any]]:
if 'target_type' not in kwargs:
return None
target_type = kwargs.pop('target_type')
if isinstance(target_type, ElementaryNode):
target_type = target_type.value
if target_type == 'executable':
return self.build_target(node, args, kwargs, Executable)
elif target_type == 'shared_library':
return self.build_target(node, args, kwargs, SharedLibrary)
elif target_type == 'static_library':
return self.build_target(node, args, kwargs, StaticLibrary)
elif target_type == 'both_libraries':
return self.build_target(node, args, kwargs, SharedLibrary)
elif target_type == 'library':
return self.build_library(node, args, kwargs)
elif target_type == 'jar':
return self.build_target(node, args, kwargs, Jar)
return None
def is_subproject(self) -> bool:
return self.subproject != ''
def analyze(self) -> None:
self.load_root_meson_file()
self.sanity_check_ast()
self.parse_project()
self.run()