The Meson Build System http://mesonbuild.com/
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# Copyright 2016 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 .visitor import AstVisitor
from .. import interpreterbase, mparser, mesonlib
from .. import environment
from ..interpreterbase import InvalidArguments, BreakRequest, ContinueRequest, TYPE_nvar, TYPE_nkwargs
from ..mparser import (
AndNode,
ArgumentNode,
ArithmeticNode,
ArrayNode,
AssignmentNode,
BaseNode,
ComparisonNode,
ElementaryNode,
EmptyNode,
ForeachClauseNode,
IdNode,
IfClauseNode,
IndexNode,
MethodNode,
OrNode,
PlusAssignmentNode,
StringNode,
TernaryNode,
UMinusNode,
)
import os, sys
import typing as T
class DontCareObject(interpreterbase.InterpreterObject):
pass
class MockExecutable(interpreterbase.InterpreterObject):
pass
class MockStaticLibrary(interpreterbase.InterpreterObject):
pass
class MockSharedLibrary(interpreterbase.InterpreterObject):
pass
class MockCustomTarget(interpreterbase.InterpreterObject):
pass
class MockRunTarget(interpreterbase.InterpreterObject):
pass
ADD_SOURCE = 0
REMOVE_SOURCE = 1
class AstInterpreter(interpreterbase.InterpreterBase):
def __init__(self, source_root: str, subdir: str, subproject: str, visitors: T.Optional[T.List[AstVisitor]] = None):
super().__init__(source_root, subdir, subproject)
self.visitors = visitors if visitors is not None else []
self.visited_subdirs = {} # type: T.Dict[str, bool]
self.assignments = {} # type: T.Dict[str, BaseNode]
self.assign_vals = {} # type: T.Dict[str, T.Any]
self.reverse_assignment = {} # type: T.Dict[str, BaseNode]
self.funcs.update({'project': self.func_do_nothing,
'test': self.func_do_nothing,
'benchmark': self.func_do_nothing,
'install_headers': self.func_do_nothing,
'install_man': self.func_do_nothing,
'install_data': self.func_do_nothing,
'install_subdir': self.func_do_nothing,
'configuration_data': self.func_do_nothing,
'configure_file': self.func_do_nothing,
'find_program': self.func_do_nothing,
'include_directories': self.func_do_nothing,
'add_global_arguments': self.func_do_nothing,
'add_global_link_arguments': self.func_do_nothing,
'add_project_arguments': self.func_do_nothing,
'add_project_link_arguments': self.func_do_nothing,
'message': self.func_do_nothing,
'generator': self.func_do_nothing,
'error': self.func_do_nothing,
'run_command': self.func_do_nothing,
'assert': self.func_do_nothing,
'subproject': self.func_do_nothing,
'dependency': self.func_do_nothing,
'get_option': self.func_do_nothing,
'join_paths': self.func_do_nothing,
'environment': self.func_do_nothing,
'import': self.func_do_nothing,
'vcs_tag': self.func_do_nothing,
'add_languages': self.func_do_nothing,
'declare_dependency': self.func_do_nothing,
'files': self.func_do_nothing,
'executable': self.func_do_nothing,
'static_library': self.func_do_nothing,
'shared_library': self.func_do_nothing,
'library': self.func_do_nothing,
'build_target': self.func_do_nothing,
'custom_target': self.func_do_nothing,
'run_target': self.func_do_nothing,
'subdir': self.func_subdir,
'set_variable': self.func_do_nothing,
'get_variable': self.func_do_nothing,
'is_disabler': self.func_do_nothing,
'is_variable': self.func_do_nothing,
'disabler': self.func_do_nothing,
'gettext': self.func_do_nothing,
'jar': self.func_do_nothing,
'warning': self.func_do_nothing,
'shared_module': self.func_do_nothing,
'option': self.func_do_nothing,
'both_libraries': self.func_do_nothing,
'add_test_setup': self.func_do_nothing,
'find_library': self.func_do_nothing,
'subdir_done': self.func_do_nothing,
'alias_target': self.func_do_nothing,
'summary': self.func_do_nothing,
})
def func_do_nothing(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> bool:
return True
def load_root_meson_file(self) -> None:
super().load_root_meson_file()
for i in self.visitors:
self.ast.accept(i)
def func_subdir(self, node: BaseNode, args: T.List[TYPE_nvar], kwargs: T.Dict[str, TYPE_nvar]) -> None:
args = self.flatten_args(args)
if len(args) != 1 or not isinstance(args[0], str):
sys.stderr.write('Unable to evaluate subdir({}) in AstInterpreter --> Skipping\n'.format(args))
return
prev_subdir = self.subdir
subdir = os.path.join(prev_subdir, args[0])
absdir = os.path.join(self.source_root, subdir)
buildfilename = os.path.join(subdir, environment.build_filename)
absname = os.path.join(self.source_root, buildfilename)
symlinkless_dir = os.path.realpath(absdir)
if symlinkless_dir in self.visited_subdirs:
sys.stderr.write('Trying to enter {} which has already been visited --> Skipping\n'.format(args[0]))
return
self.visited_subdirs[symlinkless_dir] = True
if not os.path.isfile(absname):
sys.stderr.write('Unable to find build file {} --> Skipping\n'.format(buildfilename))
return
with open(absname, encoding='utf8') as f:
code = f.read()
assert(isinstance(code, str))
try:
codeblock = mparser.Parser(code, absname).parse()
except mesonlib.MesonException as me:
me.file = absname
raise me
self.subdir = subdir
for i in self.visitors:
codeblock.accept(i)
self.evaluate_codeblock(codeblock)
self.subdir = prev_subdir
def method_call(self, node: BaseNode) -> bool:
return True
def evaluate_arithmeticstatement(self, cur: ArithmeticNode) -> int:
self.evaluate_statement(cur.left)
self.evaluate_statement(cur.right)
return 0
def evaluate_uminusstatement(self, cur: UMinusNode) -> int:
self.evaluate_statement(cur.value)
return 0
def evaluate_ternary(self, node: TernaryNode) -> None:
assert(isinstance(node, TernaryNode))
self.evaluate_statement(node.condition)
self.evaluate_statement(node.trueblock)
self.evaluate_statement(node.falseblock)
def evaluate_plusassign(self, node: PlusAssignmentNode) -> None:
assert(isinstance(node, PlusAssignmentNode))
# Cheat by doing a reassignment
self.assignments[node.var_name] = node.value # Save a reference to the value node
if node.value.ast_id:
self.reverse_assignment[node.value.ast_id] = node
self.assign_vals[node.var_name] = self.evaluate_statement(node.value)
def evaluate_indexing(self, node: IndexNode) -> int:
return 0
def unknown_function_called(self, func_name: str) -> None:
pass
def reduce_arguments(self, args: ArgumentNode, resolve_key_nodes: bool = True) -> T.Tuple[T.List[TYPE_nvar], TYPE_nkwargs]:
if isinstance(args, ArgumentNode):
kwargs = {} # type: T.Dict[T.Union[str, BaseNode], TYPE_nvar]
for key, val in args.kwargs.items():
if isinstance(key, (StringNode, IdNode)):
assert isinstance(key.value, str)
kwargs[key.value] = val
else:
kwargs[key] = val
if args.incorrect_order():
raise InvalidArguments('All keyword arguments must be after positional arguments.')
return self.flatten_args(args.arguments), kwargs
else:
return self.flatten_args(args), {}
def evaluate_comparison(self, node: ComparisonNode) -> bool:
self.evaluate_statement(node.left)
self.evaluate_statement(node.right)
return False
def evaluate_andstatement(self, cur: AndNode) -> bool:
self.evaluate_statement(cur.left)
self.evaluate_statement(cur.right)
return False
def evaluate_orstatement(self, cur: OrNode) -> bool:
self.evaluate_statement(cur.left)
self.evaluate_statement(cur.right)
return False
def evaluate_foreach(self, node: ForeachClauseNode) -> None:
try:
self.evaluate_codeblock(node.block)
except ContinueRequest:
pass
except BreakRequest:
pass
def evaluate_if(self, node: IfClauseNode) -> None:
for i in node.ifs:
self.evaluate_codeblock(i.block)
if not isinstance(node.elseblock, EmptyNode):
self.evaluate_codeblock(node.elseblock)
def get_variable(self, varname: str) -> int:
return 0
def assignment(self, node: AssignmentNode) -> None:
assert(isinstance(node, AssignmentNode))
self.assignments[node.var_name] = node.value # Save a reference to the value node
if node.value.ast_id:
self.reverse_assignment[node.value.ast_id] = node
self.assign_vals[node.var_name] = self.evaluate_statement(node.value) # Evaluate the value just in case
def resolve_node(self, node: BaseNode, include_unknown_args: bool = False, id_loop_detect: T.Optional[T.List[str]] = None) -> T.Optional[T.Any]:
def quick_resolve(n: BaseNode, loop_detect: T.Optional[T.List[str]] = None) -> T.Any:
if loop_detect is None:
loop_detect = []
if isinstance(n, IdNode):
assert isinstance(n.value, str)
if n.value in loop_detect or n.value not in self.assignments:
return []
return quick_resolve(self.assignments[n.value], loop_detect = loop_detect + [n.value])
elif isinstance(n, ElementaryNode):
return n.value
else:
return n
if id_loop_detect is None:
id_loop_detect = []
result = None
if not isinstance(node, BaseNode):
return None
assert node.ast_id
if node.ast_id in id_loop_detect:
return None # Loop detected
id_loop_detect += [node.ast_id]
# Try to evealuate the value of the node
if isinstance(node, IdNode):
result = quick_resolve(node)
elif isinstance(node, ElementaryNode):
result = node.value
elif isinstance(node, ArrayNode):
result = [x for x in node.args.arguments]
elif isinstance(node, ArgumentNode):
result = [x for x in node.arguments]
elif isinstance(node, ArithmeticNode):
if node.operation != 'add':
return None # Only handle string and array concats
l = quick_resolve(node.left)
r = quick_resolve(node.right)
if isinstance(l, str) and isinstance(r, str):
result = l + r # String concatenation detected
else:
result = self.flatten_args(l, include_unknown_args, id_loop_detect) + self.flatten_args(r, include_unknown_args, id_loop_detect)
elif isinstance(node, MethodNode):
src = quick_resolve(node.source_object)
margs = self.flatten_args(node.args.arguments, include_unknown_args, id_loop_detect)
try:
if isinstance(src, str):
result = self.string_method_call(src, node.name, margs)
elif isinstance(src, bool):
result = self.bool_method_call(src, node.name, margs)
elif isinstance(src, int):
result = self.int_method_call(src, node.name, margs)
elif isinstance(src, list):
result = self.array_method_call(src, node.name, margs)
elif isinstance(src, dict):
result = self.dict_method_call(src, node.name, margs)
except mesonlib.MesonException:
return None
# Ensure that the result is fully resolved (no more nodes)
if isinstance(result, BaseNode):
result = self.resolve_node(result, include_unknown_args, id_loop_detect)
elif isinstance(result, list):
new_res = [] # type: T.List[TYPE_nvar]
for i in result:
if isinstance(i, BaseNode):
resolved = self.resolve_node(i, include_unknown_args, id_loop_detect)
if resolved is not None:
new_res += self.flatten_args(resolved, include_unknown_args, id_loop_detect)
else:
new_res += [i]
result = new_res
return result
def flatten_args(self, args_raw: T.Union[TYPE_nvar, T.Sequence[TYPE_nvar]], include_unknown_args: bool = False, id_loop_detect: T.Optional[T.List[str]] = None) -> T.List[TYPE_nvar]:
# Make sure we are always dealing with lists
if isinstance(args_raw, list):
args = args_raw
else:
args = [args_raw]
flattend_args = [] # type: T.List[TYPE_nvar]
# Resolve the contents of args
for i in args:
if isinstance(i, BaseNode):
resolved = self.resolve_node(i, include_unknown_args, id_loop_detect)
if resolved is not None:
if not isinstance(resolved, list):
resolved = [resolved]
flattend_args += resolved
elif isinstance(i, (str, bool, int, float)) or include_unknown_args:
flattend_args += [i]
return flattend_args
def flatten_kwargs(self, kwargs: T.Dict[str, TYPE_nvar], include_unknown_args: bool = False) -> T.Dict[str, TYPE_nvar]:
flattend_kwargs = {}
for key, val in kwargs.items():
if isinstance(val, BaseNode):
resolved = self.resolve_node(val, include_unknown_args)
if resolved is not None:
flattend_kwargs[key] = resolved
elif isinstance(val, (str, bool, int, float)) or include_unknown_args:
flattend_kwargs[key] = val
return flattend_kwargs