text: # Copyright 2012-2021 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.
  
  from . import mparser
  from . import environment
  from . import coredata
  from . import dependencies
  from . import mlog
  from . import build
  from . import optinterpreter
  from . import compilers
  from .wrap import wrap, WrapMode
  from . import mesonlib
  from .mesonlib import FileMode, MachineChoice, OptionKey, Popen_safe, listify, extract_as_list, has_path_sep, unholder
  from .dependencies import ExternalProgram
  from .dependencies import InternalDependency, Dependency, NotFoundDependency, DependencyException
  from .depfile import DepFile
  from .interpreterbase import InterpreterBase, typed_pos_args
  from .interpreterbase import check_stringlist, flatten, noPosargs, noKwargs, stringArgs, permittedKwargs, noArgsFlattening
  from .interpreterbase import InterpreterException, InvalidArguments, InvalidCode, SubdirDoneRequest
  from .interpreterbase import InterpreterObject, MutableInterpreterObject, Disabler, disablerIfNotFound
  from .interpreterbase import FeatureNew, FeatureDeprecated, FeatureNewKwargs, FeatureDeprecatedKwargs
  from .interpreterbase import ObjectHolder, MesonVersionString
  from .interpreterbase import TYPE_var, TYPE_nkwargs
  from .interpreterbase import typed_pos_args
  from .modules import ModuleReturnValue, ExtensionModule
  from .cmake import CMakeInterpreter
  from .backend.backends import TestProtocol, Backend, ExecutableSerialisation
  
  from pathlib import Path, PurePath
  import os
  import shutil
  import uuid
  import re
  import shlex
  import stat
  import subprocess
  import collections
  import functools
  import typing as T
  
  import importlib
  
  if T.TYPE_CHECKING:
      from .compilers import Compiler
      from .envconfig import MachineInfo
      from .environment import Environment
      from .modules import ExtensionModule
  
  permitted_method_kwargs = {
      'partial_dependency': {'compile_args', 'link_args', 'links', 'includes',
                             'sources'},
  }
  
  def stringifyUserArguments(args, quote=False):
      if isinstance(args, list):
          return '[%s]' % ', '.join([stringifyUserArguments(x, True) for x in args])
      elif isinstance(args, dict):
          return '{%s}' % ', '.join(['%s : %s' % (stringifyUserArguments(k, True), stringifyUserArguments(v, True)) for k, v in args.items()])
      elif isinstance(args, int):
          return str(args)
      elif isinstance(args, str):
          return f"'{args}'" if quote else args
      raise InvalidArguments('Function accepts only strings, integers, lists, dictionaries and lists thereof.')
  
  
  class OverrideProgram(dependencies.ExternalProgram):
      pass
  
  
  class FeatureOptionHolder(InterpreterObject, ObjectHolder[coredata.UserFeatureOption]):
      def __init__(self, env: 'Environment', name: str, option: coredata.UserFeatureOption):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, option)
          if option.is_auto():
              # TODO: we need to case here because options is not a TypedDict
              self.held_object = T.cast(coredata.UserFeatureOption, env.coredata.options[OptionKey('auto_features')])
          self.name = name
          self.methods.update({'enabled': self.enabled_method,
                               'disabled': self.disabled_method,
                               'auto': self.auto_method,
                               })
  
      @noPosargs
      @permittedKwargs({})
      def enabled_method(self, args, kwargs):
          return self.held_object.is_enabled()
  
      @noPosargs
      @permittedKwargs({})
      def disabled_method(self, args, kwargs):
          return self.held_object.is_disabled()
  
      @noPosargs
      @permittedKwargs({})
      def auto_method(self, args, kwargs):
          return self.held_object.is_auto()
  
  def extract_required_kwarg(kwargs, subproject, feature_check=None, default=True):
      val = kwargs.get('required', default)
      disabled = False
      required = False
      feature = None
      if isinstance(val, FeatureOptionHolder):
          if not feature_check:
              feature_check = FeatureNew('User option "feature"', '0.47.0')
          feature_check.use(subproject)
          option = val.held_object
          feature = val.name
          if option.is_disabled():
              disabled = True
          elif option.is_enabled():
              required = True
      elif isinstance(val, bool):
          required = val
      else:
          raise InterpreterException('required keyword argument must be boolean or a feature option')
  
      # Keep boolean value in kwargs to simplify other places where this kwarg is
      # checked.
      kwargs['required'] = required
  
      return disabled, required, feature
  
  def extract_search_dirs(kwargs):
      search_dirs = mesonlib.stringlistify(kwargs.get('dirs', []))
      search_dirs = [Path(d).expanduser() for d in search_dirs]
      for d in search_dirs:
          if mesonlib.is_windows() and d.root.startswith('\\'):
              # a Unix-path starting with `/` that is not absolute on Windows.
              # discard without failing for end-user ease of cross-platform directory arrays
              continue
          if not d.is_absolute():
              raise InvalidCode('Search directory {} is not an absolute path.'.format(d))
      return list(map(str, search_dirs))
  
  class TryRunResultHolder(InterpreterObject):
      def __init__(self, res):
          super().__init__()
          self.res = res
          self.methods.update({'returncode': self.returncode_method,
                               'compiled': self.compiled_method,
                               'stdout': self.stdout_method,
                               'stderr': self.stderr_method,
                               })
  
      @noPosargs
      @permittedKwargs({})
      def returncode_method(self, args, kwargs):
          return self.res.returncode
  
      @noPosargs
      @permittedKwargs({})
      def compiled_method(self, args, kwargs):
          return self.res.compiled
  
      @noPosargs
      @permittedKwargs({})
      def stdout_method(self, args, kwargs):
          return self.res.stdout
  
      @noPosargs
      @permittedKwargs({})
      def stderr_method(self, args, kwargs):
          return self.res.stderr
  
  class RunProcess(InterpreterObject):
  
      def __init__(self, cmd, args, env, source_dir, build_dir, subdir, mesonintrospect, in_builddir=False, check=False, capture=True):
          super().__init__()
          if not isinstance(cmd, ExternalProgram):
              raise AssertionError('BUG: RunProcess must be passed an ExternalProgram')
          self.capture = capture
          pc, self.stdout, self.stderr = self.run_command(cmd, args, env, source_dir, build_dir, subdir, mesonintrospect, in_builddir, check)
          self.returncode = pc.returncode
          self.methods.update({'returncode': self.returncode_method,
                               'stdout': self.stdout_method,
                               'stderr': self.stderr_method,
                               })
  
      def run_command(self, cmd, args, env, source_dir, build_dir, subdir, mesonintrospect, in_builddir, check=False):
          command_array = cmd.get_command() + args
          menv = {'MESON_SOURCE_ROOT': source_dir,
                  'MESON_BUILD_ROOT': build_dir,
                  'MESON_SUBDIR': subdir,
                  'MESONINTROSPECT': ' '.join([shlex.quote(x) for x in mesonintrospect]),
                  }
          if in_builddir:
              cwd = os.path.join(build_dir, subdir)
          else:
              cwd = os.path.join(source_dir, subdir)
          child_env = os.environ.copy()
          child_env.update(menv)
          child_env = env.get_env(child_env)
          stdout = subprocess.PIPE if self.capture else subprocess.DEVNULL
          mlog.debug('Running command:', ' '.join(command_array))
          try:
              p, o, e = Popen_safe(command_array, stdout=stdout, env=child_env, cwd=cwd)
              if self.capture:
                  mlog.debug('--- stdout ---')
                  mlog.debug(o)
              else:
                  o = ''
                  mlog.debug('--- stdout disabled ---')
              mlog.debug('--- stderr ---')
              mlog.debug(e)
              mlog.debug('')
  
              if check and p.returncode != 0:
                  raise InterpreterException('Command "{}" failed with status {}.'.format(' '.join(command_array), p.returncode))
  
              return p, o, e
          except FileNotFoundError:
              raise InterpreterException('Could not execute command "%s".' % ' '.join(command_array))
  
      @noPosargs
      @permittedKwargs({})
      def returncode_method(self, args, kwargs):
          return self.returncode
  
      @noPosargs
      @permittedKwargs({})
      def stdout_method(self, args, kwargs):
          return self.stdout
  
      @noPosargs
      @permittedKwargs({})
      def stderr_method(self, args, kwargs):
          return self.stderr
  
  class ConfigureFileHolder(InterpreterObject, ObjectHolder[build.ConfigureFile]):
  
      def __init__(self, subdir, sourcename, targetname, configuration_data):
          InterpreterObject.__init__(self)
          obj = build.ConfigureFile(subdir, sourcename, targetname, configuration_data)
          ObjectHolder.__init__(self, obj)
  
  
  class EnvironmentVariablesHolder(MutableInterpreterObject, ObjectHolder[build.EnvironmentVariables]):
      def __init__(self, initial_values=None):
          MutableInterpreterObject.__init__(self)
          ObjectHolder.__init__(self, build.EnvironmentVariables())
          self.methods.update({'set': self.set_method,
                               'append': self.append_method,
                               'prepend': self.prepend_method,
                               })
          if isinstance(initial_values, dict):
              for k, v in initial_values.items():
                  self.set_method([k, v], {})
          elif isinstance(initial_values, list):
              for e in initial_values:
                  if '=' not in e:
                      raise InterpreterException('Env var definition must be of type key=val.')
                  (k, val) = e.split('=', 1)
                  k = k.strip()
                  val = val.strip()
                  if ' ' in k:
                      raise InterpreterException('Env var key must not have spaces in it.')
                  self.set_method([k, val], {})
          elif initial_values:
              raise AssertionError('Unsupported EnvironmentVariablesHolder initial_values')
  
      def __repr__(self):
          repr_str = "<{0}: {1}>"
          return repr_str.format(self.__class__.__name__, self.held_object.envvars)
  
      def add_var(self, method, args, kwargs):
          if not isinstance(kwargs.get("separator", ""), str):
              raise InterpreterException("EnvironmentVariablesHolder methods 'separator'"
                                         " argument needs to be a string.")
          if len(args) < 2:
              raise InterpreterException("EnvironmentVariablesHolder methods require at least"
                                         "2 arguments, first is the name of the variable and"
                                         " following one are values")
          # Warn when someone tries to use append() or prepend() on an env var
          # which already has an operation set on it. People seem to think that
          # multiple append/prepend operations stack, but they don't.
          if method != self.held_object.set and self.held_object.has_name(args[0]):
              mlog.warning('Overriding previous value of environment variable {!r} with a new one'
                           .format(args[0]), location=self.current_node)
          self.held_object.add_var(method, args[0], args[1:], kwargs)
  
      @stringArgs
      @permittedKwargs({'separator'})
      def set_method(self, args, kwargs):
          self.add_var(self.held_object.set, args, kwargs)
  
      @stringArgs
      @permittedKwargs({'separator'})
      def append_method(self, args, kwargs):
          self.add_var(self.held_object.append, args, kwargs)
  
      @stringArgs
      @permittedKwargs({'separator'})
      def prepend_method(self, args, kwargs):
          self.add_var(self.held_object.prepend, args, kwargs)
  
  
  class ConfigurationDataHolder(MutableInterpreterObject, ObjectHolder[build.ConfigurationData]):
      def __init__(self, pv, initial_values=None):
          MutableInterpreterObject.__init__(self)
          self.used = False # These objects become immutable after use in configure_file.
          ObjectHolder.__init__(self, build.ConfigurationData(), pv)
          self.methods.update({'set': self.set_method,
                               'set10': self.set10_method,
                               'set_quoted': self.set_quoted_method,
                               'has': self.has_method,
                               'get': self.get_method,
                               'keys': self.keys_method,
                               'get_unquoted': self.get_unquoted_method,
                               'merge_from': self.merge_from_method,
                               })
          if isinstance(initial_values, dict):
              for k, v in initial_values.items():
                  self.set_method([k, v], {})
          elif initial_values:
              raise AssertionError('Unsupported ConfigurationDataHolder initial_values')
  
      def is_used(self):
          return self.used
  
      def mark_used(self):
          self.used = True
  
      def validate_args(self, args, kwargs):
          if len(args) == 1 and isinstance(args[0], list) and len(args[0]) == 2:
              mlog.deprecation('Passing a list as the single argument to '
                               'configuration_data.set is deprecated. This will '
                               'become a hard error in the future.',
                               location=self.current_node)
              args = args[0]
  
          if len(args) != 2:
              raise InterpreterException("Configuration set requires 2 arguments.")
          if self.used:
              raise InterpreterException("Can not set values on configuration object that has been used.")
          name, val = args
          if not isinstance(val, (int, str)):
              msg = 'Setting a configuration data value to {!r} is invalid, ' \
                    'and will fail at configure_file(). If you are using it ' \
                    'just to store some values, please use a dict instead.'
              mlog.deprecation(msg.format(val), location=self.current_node)
          desc = kwargs.get('description', None)
          if not isinstance(name, str):
              raise InterpreterException("First argument to set must be a string.")
          if desc is not None and not isinstance(desc, str):
              raise InterpreterException('Description must be a string.')
  
          return name, val, desc
  
      @noArgsFlattening
      def set_method(self, args, kwargs):
          (name, val, desc) = self.validate_args(args, kwargs)
          self.held_object.values[name] = (val, desc)
  
      def set_quoted_method(self, args, kwargs):
          (name, val, desc) = self.validate_args(args, kwargs)
          if not isinstance(val, str):
              raise InterpreterException("Second argument to set_quoted must be a string.")
          escaped_val = '\\"'.join(val.split('"'))
          self.held_object.values[name] = ('"' + escaped_val + '"', desc)
  
      def set10_method(self, args, kwargs):
          (name, val, desc) = self.validate_args(args, kwargs)
          if val:
              self.held_object.values[name] = (1, desc)
          else:
              self.held_object.values[name] = (0, desc)
  
      def has_method(self, args, kwargs):
          return args[0] in self.held_object.values
  
      @FeatureNew('configuration_data.get()', '0.38.0')
      @noArgsFlattening
      def get_method(self, args, kwargs):
          if len(args) < 1 or len(args) > 2:
              raise InterpreterException('Get method takes one or two arguments.')
          name = args[0]
          if name in self.held_object:
              return self.held_object.get(name)[0]
          if len(args) > 1:
              return args[1]
          raise InterpreterException('Entry %s not in configuration data.' % name)
  
      @FeatureNew('configuration_data.get_unquoted()', '0.44.0')
      def get_unquoted_method(self, args, kwargs):
          if len(args) < 1 or len(args) > 2:
              raise InterpreterException('Get method takes one or two arguments.')
          name = args[0]
          if name in self.held_object:
              val = self.held_object.get(name)[0]
          elif len(args) > 1:
              val = args[1]
          else:
              raise InterpreterException('Entry %s not in configuration data.' % name)
          if val[0] == '"' and val[-1] == '"':
              return val[1:-1]
          return val
  
      def get(self, name):
          return self.held_object.values[name] # (val, desc)
  
      @FeatureNew('configuration_data.keys()', '0.57.0')
      @noPosargs
      def keys_method(self, args, kwargs):
          return sorted(self.keys())
  
      def keys(self):
          return self.held_object.values.keys()
  
      def merge_from_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Merge_from takes one positional argument.')
          from_object = args[0]
          if not isinstance(from_object, ConfigurationDataHolder):
              raise InterpreterException('Merge_from argument must be a configuration data object.')
          from_object = from_object.held_object
          for k, v in from_object.values.items():
              self.held_object.values[k] = v
  
  # Interpreter objects can not be pickled so we must have
  # these wrappers.
  
  class DependencyHolder(InterpreterObject, ObjectHolder[Dependency]):
      def __init__(self, dep: Dependency, pv: str):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, dep, pv)
          self.methods.update({'found': self.found_method,
                               'type_name': self.type_name_method,
                               'version': self.version_method,
                               'name': self.name_method,
                               'get_pkgconfig_variable': self.pkgconfig_method,
                               'get_configtool_variable': self.configtool_method,
                               'get_variable': self.variable_method,
                               'partial_dependency': self.partial_dependency_method,
                               'include_type': self.include_type_method,
                               'as_system': self.as_system_method,
                               'as_link_whole': self.as_link_whole_method,
                               })
  
      def found(self):
          return self.found_method([], {})
  
      @noPosargs
      @permittedKwargs({})
      def type_name_method(self, args, kwargs):
          return self.held_object.type_name
  
      @noPosargs
      @permittedKwargs({})
      def found_method(self, args, kwargs):
          if self.held_object.type_name == 'internal':
              return True
          return self.held_object.found()
  
      @noPosargs
      @permittedKwargs({})
      def version_method(self, args, kwargs):
          return self.held_object.get_version()
  
      @noPosargs
      @permittedKwargs({})
      def name_method(self, args, kwargs):
          return self.held_object.get_name()
  
      @FeatureDeprecated('Dependency.get_pkgconfig_variable', '0.56.0',
                         'use Dependency.get_variable(pkgconfig : ...) instead')
      @permittedKwargs({'define_variable', 'default'})
      def pkgconfig_method(self, args, kwargs):
          args = listify(args)
          if len(args) != 1:
              raise InterpreterException('get_pkgconfig_variable takes exactly one argument.')
          varname = args[0]
          if not isinstance(varname, str):
              raise InterpreterException('Variable name must be a string.')
          return self.held_object.get_pkgconfig_variable(varname, kwargs)
  
      @FeatureNew('dep.get_configtool_variable', '0.44.0')
      @FeatureDeprecated('Dependency.get_configtool_variable', '0.56.0',
                         'use Dependency.get_variable(configtool : ...) instead')
      @permittedKwargs({})
      def configtool_method(self, args, kwargs):
          args = listify(args)
          if len(args) != 1:
              raise InterpreterException('get_configtool_variable takes exactly one argument.')
          varname = args[0]
          if not isinstance(varname, str):
              raise InterpreterException('Variable name must be a string.')
          return self.held_object.get_configtool_variable(varname)
  
      @FeatureNew('dep.partial_dependency', '0.46.0')
      @noPosargs
      @permittedKwargs(permitted_method_kwargs['partial_dependency'])
      def partial_dependency_method(self, args, kwargs):
          pdep = self.held_object.get_partial_dependency(**kwargs)
          return DependencyHolder(pdep, self.subproject)
  
      @FeatureNew('dep.get_variable', '0.51.0')
      @noPosargs
      @permittedKwargs({'cmake', 'pkgconfig', 'configtool', 'internal', 'default_value', 'pkgconfig_define'})
      @FeatureNewKwargs('dep.get_variable', '0.54.0', ['internal'])
      def variable_method(self, args, kwargs):
          return self.held_object.get_variable(**kwargs)
  
      @FeatureNew('dep.include_type', '0.52.0')
      @noPosargs
      @permittedKwargs({})
      def include_type_method(self, args, kwargs):
          return self.held_object.get_include_type()
  
      @FeatureNew('dep.as_system', '0.52.0')
      @permittedKwargs({})
      def as_system_method(self, args, kwargs):
          args = listify(args)
          new_is_system = 'system'
          if len(args) > 1:
              raise InterpreterException('as_system takes only one optional value')
          if len(args) == 1:
              new_is_system = args[0]
          new_dep = self.held_object.generate_system_dependency(new_is_system)
          return DependencyHolder(new_dep, self.subproject)
  
      @FeatureNew('dep.as_link_whole', '0.56.0')
      @permittedKwargs({})
      @noPosargs
      def as_link_whole_method(self, args, kwargs):
          if not isinstance(self.held_object, InternalDependency):
              raise InterpreterException('as_link_whole method is only supported on declare_dependency() objects')
          new_dep = self.held_object.generate_link_whole_dependency()
          return DependencyHolder(new_dep, self.subproject)
  
  class ExternalProgramHolder(InterpreterObject, ObjectHolder[ExternalProgram]):
      def __init__(self, ep: ExternalProgram, subproject: str, backend=None):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, ep)
          self.subproject = subproject
          self.backend = backend
          self.methods.update({'found': self.found_method,
                               'path': self.path_method,
                               'full_path': self.full_path_method})
          self.cached_version = None
  
      @noPosargs
      @permittedKwargs({})
      def found_method(self, args, kwargs):
          return self.found()
  
      @noPosargs
      @permittedKwargs({})
      @FeatureDeprecated('ExternalProgram.path', '0.55.0',
                         'use ExternalProgram.full_path() instead')
      def path_method(self, args, kwargs):
          return self._full_path()
  
      @noPosargs
      @permittedKwargs({})
      @FeatureNew('ExternalProgram.full_path', '0.55.0')
      def full_path_method(self, args, kwargs):
          return self._full_path()
  
      def _full_path(self):
          exe = self.held_object
          if isinstance(exe, build.Executable):
              return self.backend.get_target_filename_abs(exe)
          return exe.get_path()
  
      def found(self):
          return isinstance(self.held_object, build.Executable) or self.held_object.found()
  
      def get_command(self):
          return self.held_object.get_command()
  
      def get_name(self):
          exe = self.held_object
          if isinstance(exe, build.Executable):
              return exe.name
          return exe.get_name()
  
      def get_version(self, interpreter):
          if isinstance(self.held_object, build.Executable):
              return self.held_object.project_version
          if not self.cached_version:
              raw_cmd = self.get_command() + ['--version']
              cmd = [self, '--version']
              res = interpreter.run_command_impl(interpreter.current_node, cmd, {}, True)
              if res.returncode != 0:
                  m = 'Running {!r} failed'
                  raise InterpreterException(m.format(raw_cmd))
              output = res.stdout.strip()
              if not output:
                  output = res.stderr.strip()
              match = re.search(r'([0-9][0-9\.]+)', output)
              if not match:
                  m = 'Could not find a version number in output of {!r}'
                  raise InterpreterException(m.format(raw_cmd))
              self.cached_version = match.group(1)
          return self.cached_version
  
  class ExternalLibraryHolder(InterpreterObject, ObjectHolder[dependencies.ExternalLibrary]):
      def __init__(self, el: dependencies.ExternalLibrary, pv: str):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, el, pv)
          self.methods.update({'found': self.found_method,
                               'type_name': self.type_name_method,
                               'partial_dependency': self.partial_dependency_method,
                               })
  
      def found(self):
          return self.held_object.found()
  
      @noPosargs
      @permittedKwargs({})
      def type_name_method(self, args, kwargs):
          return self.held_object.type_name
  
      @noPosargs
      @permittedKwargs({})
      def found_method(self, args, kwargs):
          return self.found()
  
      def get_name(self):
          return self.held_object.name
  
      def get_compile_args(self):
          return self.held_object.get_compile_args()
  
      def get_link_args(self):
          return self.held_object.get_link_args()
  
      def get_exe_args(self):
          return self.held_object.get_exe_args()
  
      @FeatureNew('dep.partial_dependency', '0.46.0')
      @noPosargs
      @permittedKwargs(permitted_method_kwargs['partial_dependency'])
      def partial_dependency_method(self, args, kwargs):
          pdep = self.held_object.get_partial_dependency(**kwargs)
          return DependencyHolder(pdep, self.subproject)
  
  class GeneratorHolder(InterpreterObject, ObjectHolder[build.Generator]):
      @FeatureNewKwargs('generator', '0.43.0', ['capture'])
      def __init__(self, interp, args, kwargs):
          self.interpreter = interp
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, build.Generator(args, kwargs), interp.subproject)
          self.methods.update({'process': self.process_method})
  
      @FeatureNewKwargs('generator.process', '0.45.0', ['preserve_path_from'])
      @permittedKwargs({'extra_args', 'preserve_path_from'})
      def process_method(self, args, kwargs):
          extras = mesonlib.stringlistify(kwargs.get('extra_args', []))
          if 'preserve_path_from' in kwargs:
              preserve_path_from = kwargs['preserve_path_from']
              if not isinstance(preserve_path_from, str):
                  raise InvalidArguments('Preserve_path_from must be a string.')
              preserve_path_from = os.path.normpath(preserve_path_from)
              if not os.path.isabs(preserve_path_from):
                  # This is a bit of a hack. Fix properly before merging.
                  raise InvalidArguments('Preserve_path_from must be an absolute path for now. Sorry.')
          else:
              preserve_path_from = None
          gl = self.held_object.process_files('Generator', args, self.interpreter,
                                              preserve_path_from, extra_args=extras)
          return GeneratedListHolder(gl)
  
  
  class GeneratedListHolder(InterpreterObject, ObjectHolder[build.GeneratedList]):
      def __init__(self, arg1, extra_args=None):
          InterpreterObject.__init__(self)
          if isinstance(arg1, GeneratorHolder):
              ObjectHolder.__init__(self, build.GeneratedList(arg1.held_object, extra_args if extra_args is not None else []))
          else:
              ObjectHolder.__init__(self, arg1)
  
      def __repr__(self):
          r = '<{}: {!r}>'
          return r.format(self.__class__.__name__, self.held_object.get_outputs())
  
      def add_file(self, a):
          self.held_object.add_file(a)
  
  # A machine that's statically known from the cross file
  class MachineHolder(InterpreterObject, ObjectHolder['MachineInfo']):
      def __init__(self, machine_info: 'MachineInfo'):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, machine_info)
          self.methods.update({'system': self.system_method,
                               'cpu': self.cpu_method,
                               'cpu_family': self.cpu_family_method,
                               'endian': self.endian_method,
                               })
  
      @noPosargs
      @permittedKwargs({})
      def cpu_family_method(self, args: T.List[TYPE_var], kwargs: TYPE_nkwargs) -> str:
          return self.held_object.cpu_family
  
      @noPosargs
      @permittedKwargs({})
      def cpu_method(self, args: T.List[TYPE_var], kwargs: TYPE_nkwargs) -> str:
          return self.held_object.cpu
  
      @noPosargs
      @permittedKwargs({})
      def system_method(self, args: T.List[TYPE_var], kwargs: TYPE_nkwargs) -> str:
          return self.held_object.system
  
      @noPosargs
      @permittedKwargs({})
      def endian_method(self, args: T.List[TYPE_var], kwargs: TYPE_nkwargs) -> str:
          return self.held_object.endian
  
  class IncludeDirsHolder(InterpreterObject, ObjectHolder[build.IncludeDirs]):
      def __init__(self, idobj: build.IncludeDirs):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, idobj)
  
  class HeadersHolder(InterpreterObject, ObjectHolder[build.Headers]):
  
      def __init__(self, obj: build.Headers):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, obj)
  
      def set_install_subdir(self, subdir):
          self.held_object.install_subdir = subdir
  
      def get_install_subdir(self):
          return self.held_object.install_subdir
  
      def get_sources(self):
          return self.held_object.sources
  
      def get_custom_install_dir(self):
          return self.held_object.custom_install_dir
  
      def get_custom_install_mode(self):
          return self.held_object.custom_install_mode
  
  class DataHolder(InterpreterObject, ObjectHolder[build.Data]):
      def __init__(self, data: build.Data):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, data)
  
      def get_source_subdir(self):
          return self.held_object.source_subdir
  
      def get_sources(self):
          return self.held_object.sources
  
      def get_install_dir(self):
          return self.held_object.install_dir
  
  class InstallDirHolder(InterpreterObject, ObjectHolder[build.IncludeDirs]):
  
      def __init__(self, obj: build.InstallDir):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, obj)
  
  class ManHolder(InterpreterObject, ObjectHolder[build.Man]):
  
      def __init__(self, obj: build.Man):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, obj)
  
      def get_custom_install_dir(self) -> T.Optional[str]:
          return self.held_object.custom_install_dir
  
      def get_custom_install_mode(self) -> T.Optional[FileMode]:
          return self.held_object.custom_install_mode
  
      def locale(self) -> T.Optional[str]:
          return self.held_object.locale
  
      def get_sources(self) -> T.List[mesonlib.File]:
          return self.held_object.sources
  
  class GeneratedObjectsHolder(InterpreterObject, ObjectHolder[build.ExtractedObjects]):
      def __init__(self, held_object: build.ExtractedObjects):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, held_object)
  
  
  _Target = T.TypeVar('_Target', bound=build.Target)
  
  
  class TargetHolder(InterpreterObject, ObjectHolder[_Target]):
      def __init__(self, target: _Target, interp: 'Interpreter'):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, target, interp.subproject)
          self.interpreter = interp
  
  
  _BuildTarget = T.TypeVar('_BuildTarget', bound=build.BuildTarget)
  
  class BuildTargetHolder(TargetHolder[_BuildTarget]):
      def __init__(self, target: _BuildTarget, interp: 'Interpreter'):
          super().__init__(target, interp)
          self.methods.update({'extract_objects': self.extract_objects_method,
                               'extract_all_objects': self.extract_all_objects_method,
                               'name': self.name_method,
                               'get_id': self.get_id_method,
                               'outdir': self.outdir_method,
                               'full_path': self.full_path_method,
                               'private_dir_include': self.private_dir_include_method,
                               })
  
      def __repr__(self):
          r = '<{} {}: {}>'
          h = self.held_object
          return r.format(self.__class__.__name__, h.get_id(), h.filename)
  
      def is_cross(self):
          return not self.held_object.environment.machines.matches_build_machine(self.held_object.for_machine)
  
      @noPosargs
      @permittedKwargs({})
      def private_dir_include_method(self, args, kwargs):
          return IncludeDirsHolder(build.IncludeDirs('', [], False,
                                                     [self.interpreter.backend.get_target_private_dir(self.held_object)]))
  
      @noPosargs
      @permittedKwargs({})
      def full_path_method(self, args, kwargs):
          return self.interpreter.backend.get_target_filename_abs(self.held_object)
  
      @noPosargs
      @permittedKwargs({})
      def outdir_method(self, args, kwargs):
          return self.interpreter.backend.get_target_dir(self.held_object)
  
      @permittedKwargs({})
      def extract_objects_method(self, args, kwargs):
          gobjs = self.held_object.extract_objects(args)
          return GeneratedObjectsHolder(gobjs)
  
      @FeatureNewKwargs('extract_all_objects', '0.46.0', ['recursive'])
      @noPosargs
      @permittedKwargs({'recursive'})
      def extract_all_objects_method(self, args, kwargs):
          recursive = kwargs.get('recursive', False)
          gobjs = self.held_object.extract_all_objects(recursive)
          if gobjs.objlist and 'recursive' not in kwargs:
              mlog.warning('extract_all_objects called without setting recursive '
                           'keyword argument. Meson currently defaults to '
                           'non-recursive to maintain backward compatibility but '
                           'the default will be changed in the future.',
                           location=self.current_node)
          return GeneratedObjectsHolder(gobjs)
  
      @noPosargs
      @permittedKwargs({})
      def get_id_method(self, args, kwargs):
          return self.held_object.get_id()
  
      @FeatureNew('name', '0.54.0')
      @noPosargs
      @permittedKwargs({})
      def name_method(self, args, kwargs):
          return self.held_object.name
  
  class ExecutableHolder(BuildTargetHolder[build.Executable]):
      pass
  
  class StaticLibraryHolder(BuildTargetHolder[build.StaticLibrary]):
      pass
  
  class SharedLibraryHolder(BuildTargetHolder[build.SharedLibrary]):
      def __init__(self, target: build.SharedLibrary, interp: 'Interpreter'):
          super().__init__(target, interp)
          # Set to True only when called from self.func_shared_lib().
          target.shared_library_only = False
  
  class BothLibrariesHolder(BuildTargetHolder):
      def __init__(self, shared_holder, static_holder, interp):
          # FIXME: This build target always represents the shared library, but
          # that should be configurable.
          super().__init__(shared_holder.held_object, interp)
          self.shared_holder = shared_holder
          self.static_holder = static_holder
          self.methods.update({'get_shared_lib': self.get_shared_lib_method,
                               'get_static_lib': self.get_static_lib_method,
                               })
  
      def __repr__(self):
          r = '<{} {}: {}, {}: {}>'
          h1 = self.shared_holder.held_object
          h2 = self.static_holder.held_object
          return r.format(self.__class__.__name__, h1.get_id(), h1.filename, h2.get_id(), h2.filename)
  
      @noPosargs
      @permittedKwargs({})
      def get_shared_lib_method(self, args, kwargs):
          return self.shared_holder
  
      @noPosargs
      @permittedKwargs({})
      def get_static_lib_method(self, args, kwargs):
          return self.static_holder
  
  class SharedModuleHolder(BuildTargetHolder[build.SharedModule]):
      pass
  
  class JarHolder(BuildTargetHolder[build.Jar]):
      pass
  
  class CustomTargetIndexHolder(TargetHolder[build.CustomTargetIndex]):
      def __init__(self, target: build.CustomTargetIndex, interp: 'Interpreter'):
          super().__init__(target, interp)
          self.methods.update({'full_path': self.full_path_method,
                               })
  
      @FeatureNew('custom_target[i].full_path', '0.54.0')
      @noPosargs
      @permittedKwargs({})
      def full_path_method(self, args, kwargs):
          return self.interpreter.backend.get_target_filename_abs(self.held_object)
  
  class CustomTargetHolder(TargetHolder):
      def __init__(self, target: 'build.CustomTarget', interp: 'Interpreter'):
          super().__init__(target, interp)
          self.methods.update({'full_path': self.full_path_method,
                               'to_list': self.to_list_method,
                               })
  
      def __repr__(self):
          r = '<{} {}: {}>'
          h = self.held_object
          return r.format(self.__class__.__name__, h.get_id(), h.command)
  
      @noPosargs
      @permittedKwargs({})
      def full_path_method(self, args, kwargs):
          return self.interpreter.backend.get_target_filename_abs(self.held_object)
  
      @FeatureNew('custom_target.to_list', '0.54.0')
      @noPosargs
      @permittedKwargs({})
      def to_list_method(self, args, kwargs):
          result = []
          for i in self.held_object:
              result.append(CustomTargetIndexHolder(i, self.interpreter))
          return result
  
      def __getitem__(self, index):
          return CustomTargetIndexHolder(self.held_object[index], self.interpreter)
  
      def __setitem__(self, index, value):  # lgtm[py/unexpected-raise-in-special-method]
          raise InterpreterException('Cannot set a member of a CustomTarget')
  
      def __delitem__(self, index):  # lgtm[py/unexpected-raise-in-special-method]
          raise InterpreterException('Cannot delete a member of a CustomTarget')
  
      def outdir_include(self):
          return IncludeDirsHolder(build.IncludeDirs('', [], False,
                                                     [os.path.join('@BUILD_ROOT@', self.interpreter.backend.get_target_dir(self.held_object))]))
  
  class RunTargetHolder(TargetHolder):
      def __init__(self, target, interp):
          super().__init__(target, interp)
  
      def __repr__(self):
          r = '<{} {}: {}>'
          h = self.held_object
          return r.format(self.__class__.__name__, h.get_id(), h.command)
  
  class Test(InterpreterObject):
      def __init__(self, name: str, project: str, suite: T.List[str], exe: build.Executable,
                   depends: T.List[T.Union[build.CustomTarget, build.BuildTarget]],
                   is_parallel: bool, cmd_args: T.List[str], env: build.EnvironmentVariables,
                   should_fail: bool, timeout: int, workdir: T.Optional[str], protocol: str,
                   priority: int):
          InterpreterObject.__init__(self)
          self.name = name
          self.suite = suite
          self.project_name = project
          self.exe = exe
          self.depends = depends
          self.is_parallel = is_parallel
          self.cmd_args = cmd_args
          self.env = env
          self.should_fail = should_fail
          self.timeout = timeout
          self.workdir = workdir
          self.protocol = TestProtocol.from_str(protocol)
          self.priority = priority
  
      def get_exe(self):
          return self.exe
  
      def get_name(self):
          return self.name
  
  class SubprojectHolder(InterpreterObject, ObjectHolder[T.Optional['Interpreter']]):
  
      def __init__(self, subinterpreter: T.Optional['Interpreter'], subdir: str, warnings=0, disabled_feature=None,
                   exception=None):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, subinterpreter)
          self.warnings = warnings
          self.disabled_feature = disabled_feature
          self.exception = exception
          self.subdir = PurePath(subdir).as_posix()
          self.methods.update({'get_variable': self.get_variable_method,
                               'found': self.found_method,
                               })
  
      @noPosargs
      @permittedKwargs({})
      def found_method(self, args, kwargs):
          return self.found()
  
      def found(self):
          return self.held_object is not None
  
      @permittedKwargs({})
      @noArgsFlattening
      def get_variable_method(self, args, kwargs):
          if len(args) < 1 or len(args) > 2:
              raise InterpreterException('Get_variable takes one or two arguments.')
          if not self.found():
              raise InterpreterException('Subproject "%s" disabled can\'t get_variable on it.' % (self.subdir))
          varname = args[0]
          if not isinstance(varname, str):
              raise InterpreterException('Get_variable first argument must be a string.')
          try:
              return self.held_object.variables[varname]
          except KeyError:
              pass
  
          if len(args) == 2:
              return args[1]
  
          raise InvalidArguments('Requested variable "{0}" not found.'.format(varname))
  
  header_permitted_kwargs = set([
      'required',
      'prefix',
      'no_builtin_args',
      'include_directories',
      'args',
      'dependencies',
  ])
  
  find_library_permitted_kwargs = set([
      'has_headers',
      'required',
      'dirs',
      'static',
  ])
  
  find_library_permitted_kwargs |= set(['header_' + k for k in header_permitted_kwargs])
  
  class CompilerHolder(InterpreterObject):
      def __init__(self, compiler: 'Compiler', env: 'Environment', subproject: str):
          InterpreterObject.__init__(self)
          self.compiler = compiler
          self.environment = env
          self.subproject = subproject
          self.methods.update({'compiles': self.compiles_method,
                               'links': self.links_method,
                               'get_id': self.get_id_method,
                               'get_linker_id': self.get_linker_id_method,
                               'compute_int': self.compute_int_method,
                               'sizeof': self.sizeof_method,
                               'get_define': self.get_define_method,
                               'check_header': self.check_header_method,
                               'has_header': self.has_header_method,
                               'has_header_symbol': self.has_header_symbol_method,
                               'run': self.run_method,
                               'has_function': self.has_function_method,
                               'has_member': self.has_member_method,
                               'has_members': self.has_members_method,
                               'has_type': self.has_type_method,
                               'alignment': self.alignment_method,
                               'version': self.version_method,
                               'cmd_array': self.cmd_array_method,
                               'find_library': self.find_library_method,
                               'has_argument': self.has_argument_method,
                               'has_function_attribute': self.has_func_attribute_method,
                               'get_supported_function_attributes': self.get_supported_function_attributes_method,
                               'has_multi_arguments': self.has_multi_arguments_method,
                               'get_supported_arguments': self.get_supported_arguments_method,
                               'first_supported_argument': self.first_supported_argument_method,
                               'has_link_argument': self.has_link_argument_method,
                               'has_multi_link_arguments': self.has_multi_link_arguments_method,
                               'get_supported_link_arguments': self.get_supported_link_arguments_method,
                               'first_supported_link_argument': self.first_supported_link_argument_method,
                               'unittest_args': self.unittest_args_method,
                               'symbols_have_underscore_prefix': self.symbols_have_underscore_prefix_method,
                               'get_argument_syntax': self.get_argument_syntax_method,
                               })
  
      def _dep_msg(self, deps, endl):
          msg_single = 'with dependency {}'
          msg_many = 'with dependencies {}'
          if not deps:
              return endl
          if endl is None:
              endl = ''
          names = []
          for d in deps:
              if isinstance(d, dependencies.InternalDependency):
                  continue
              if isinstance(d, dependencies.ExternalLibrary):
                  name = '-l' + d.name
              else:
                  name = d.name
              names.append(name)
          if not names:
              return None
          tpl = msg_many if len(names) > 1 else msg_single
          return tpl.format(', '.join(names)) + endl
  
      @noPosargs
      @permittedKwargs({})
      def version_method(self, args, kwargs):
          return self.compiler.version
  
      @noPosargs
      @permittedKwargs({})
      def cmd_array_method(self, args, kwargs):
          return self.compiler.exelist
  
      def determine_args(self, kwargs, mode='link'):
          nobuiltins = kwargs.get('no_builtin_args', False)
          if not isinstance(nobuiltins, bool):
              raise InterpreterException('Type of no_builtin_args not a boolean.')
          args = []
          incdirs = extract_as_list(kwargs, 'include_directories')
          for i in incdirs:
              if not isinstance(i, IncludeDirsHolder):
                  raise InterpreterException('Include directories argument must be an include_directories object.')
              for idir in i.held_object.to_string_list(self.environment.get_source_dir()):
                  args += self.compiler.get_include_args(idir, False)
          if not nobuiltins:
              opts = self.environment.coredata.options
              args += self.compiler.get_option_compile_args(opts)
              if mode == 'link':
                  args += self.compiler.get_option_link_args(opts)
          args += mesonlib.stringlistify(kwargs.get('args', []))
          return args
  
      def determine_dependencies(self, kwargs, endl=':'):
          deps = kwargs.get('dependencies', None)
          if deps is not None:
              final_deps = []
              while deps:
                  next_deps = []
                  for d in unholder(listify(deps)):
                      if not isinstance(d, Dependency) or d.is_built():
                          raise InterpreterException('Dependencies must be external dependencies')
                      final_deps.append(d)
                      next_deps.extend(d.ext_deps)
                  deps = next_deps
              deps = final_deps
          return deps, self._dep_msg(deps, endl)
  
      @permittedKwargs({
          'prefix',
          'args',
          'dependencies',
      })
      def alignment_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Alignment method takes exactly one positional argument.')
          check_stringlist(args)
          typename = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of alignment must be a string.')
          extra_args = mesonlib.stringlistify(kwargs.get('args', []))
          deps, msg = self.determine_dependencies(kwargs)
          result = self.compiler.alignment(typename, prefix, self.environment,
                                           extra_args=extra_args,
                                           dependencies=deps)
          mlog.log('Checking for alignment of', mlog.bold(typename, True), msg, result)
          return result
  
      @permittedKwargs({
          'name',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def run_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Run method takes exactly one positional argument.')
          code = args[0]
          if isinstance(code, mesonlib.File):
              code = mesonlib.File.from_absolute_file(
                  code.rel_to_builddir(self.environment.source_dir))
          elif not isinstance(code, str):
              raise InvalidArguments('Argument must be string or file.')
          testname = kwargs.get('name', '')
          if not isinstance(testname, str):
              raise InterpreterException('Testname argument must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs, endl=None)
          result = self.compiler.run(code, self.environment, extra_args=extra_args,
                                     dependencies=deps)
          if len(testname) > 0:
              if not result.compiled:
                  h = mlog.red('DID NOT COMPILE')
              elif result.returncode == 0:
                  h = mlog.green('YES')
              else:
                  h = mlog.red('NO (%d)' % result.returncode)
              mlog.log('Checking if', mlog.bold(testname, True), msg, 'runs:', h)
          return TryRunResultHolder(result)
  
      @noPosargs
      @permittedKwargs({})
      def get_id_method(self, args, kwargs):
          return self.compiler.get_id()
  
      @noPosargs
      @permittedKwargs({})
      @FeatureNew('compiler.get_linker_id', '0.53.0')
      def get_linker_id_method(self, args, kwargs):
          return self.compiler.get_linker_id()
  
      @noPosargs
      @permittedKwargs({})
      def symbols_have_underscore_prefix_method(self, args, kwargs):
          '''
          Check if the compiler prefixes _ (underscore) to global C symbols
          See: https://en.wikipedia.org/wiki/Name_mangling#C
          '''
          return self.compiler.symbols_have_underscore_prefix(self.environment)
  
      @noPosargs
      @permittedKwargs({})
      def unittest_args_method(self, args, kwargs):
          '''
          This function is deprecated and should not be used.
          It can be removed in a future version of Meson.
          '''
          if not hasattr(self.compiler, 'get_feature_args'):
              raise InterpreterException('This {} compiler has no feature arguments.'.format(self.compiler.get_display_language()))
          build_to_src = os.path.relpath(self.environment.get_source_dir(), self.environment.get_build_dir())
          return self.compiler.get_feature_args({'unittest': 'true'}, build_to_src)
  
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def has_member_method(self, args, kwargs):
          if len(args) != 2:
              raise InterpreterException('Has_member takes exactly two arguments.')
          check_stringlist(args)
          typename, membername = args
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_member must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          had, cached = self.compiler.has_members(typename, [membername], prefix,
                                                  self.environment,
                                                  extra_args=extra_args,
                                                  dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if had:
              hadtxt = mlog.green('YES')
          else:
              hadtxt = mlog.red('NO')
          mlog.log('Checking whether type', mlog.bold(typename, True),
                   'has member', mlog.bold(membername, True), msg, hadtxt, cached)
          return had
  
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def has_members_method(self, args, kwargs):
          if len(args) < 2:
              raise InterpreterException('Has_members needs at least two arguments.')
          check_stringlist(args)
          typename, *membernames = args
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_members must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          had, cached = self.compiler.has_members(typename, membernames, prefix,
                                                  self.environment,
                                                  extra_args=extra_args,
                                                  dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if had:
              hadtxt = mlog.green('YES')
          else:
              hadtxt = mlog.red('NO')
          members = mlog.bold(', '.join(['"{}"'.format(m) for m in membernames]))
          mlog.log('Checking whether type', mlog.bold(typename, True),
                   'has members', members, msg, hadtxt, cached)
          return had
  
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def has_function_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Has_function takes exactly one argument.')
          check_stringlist(args)
          funcname = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_function must be a string.')
          extra_args = self.determine_args(kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          had, cached = self.compiler.has_function(funcname, prefix, self.environment,
                                                   extra_args=extra_args,
                                                   dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if had:
              hadtxt = mlog.green('YES')
          else:
              hadtxt = mlog.red('NO')
          mlog.log('Checking for function', mlog.bold(funcname, True), msg, hadtxt, cached)
          return had
  
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def has_type_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Has_type takes exactly one argument.')
          check_stringlist(args)
          typename = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_type must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          had, cached = self.compiler.has_type(typename, prefix, self.environment,
                                               extra_args=extra_args, dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if had:
              hadtxt = mlog.green('YES')
          else:
              hadtxt = mlog.red('NO')
          mlog.log('Checking for type', mlog.bold(typename, True), msg, hadtxt, cached)
          return had
  
      @FeatureNew('compiler.compute_int', '0.40.0')
      @permittedKwargs({
          'prefix',
          'low',
          'high',
          'guess',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def compute_int_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Compute_int takes exactly one argument.')
          check_stringlist(args)
          expression = args[0]
          prefix = kwargs.get('prefix', '')
          low = kwargs.get('low', None)
          high = kwargs.get('high', None)
          guess = kwargs.get('guess', None)
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of compute_int must be a string.')
          if low is not None and not isinstance(low, int):
              raise InterpreterException('Low argument of compute_int must be an int.')
          if high is not None and not isinstance(high, int):
              raise InterpreterException('High argument of compute_int must be an int.')
          if guess is not None and not isinstance(guess, int):
              raise InterpreterException('Guess argument of compute_int must be an int.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          res = self.compiler.compute_int(expression, low, high, guess, prefix,
                                          self.environment, extra_args=extra_args,
                                          dependencies=deps)
          mlog.log('Computing int of', mlog.bold(expression, True), msg, res)
          return res
  
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def sizeof_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Sizeof takes exactly one argument.')
          check_stringlist(args)
          element = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of sizeof must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          esize = self.compiler.sizeof(element, prefix, self.environment,
                                       extra_args=extra_args, dependencies=deps)
          mlog.log('Checking for size of', mlog.bold(element, True), msg, esize)
          return esize
  
      @FeatureNew('compiler.get_define', '0.40.0')
      @permittedKwargs({
          'prefix',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def get_define_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('get_define() takes exactly one argument.')
          check_stringlist(args)
          element = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of get_define() must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          value, cached = self.compiler.get_define(element, prefix, self.environment,
                                                   extra_args=extra_args,
                                                   dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          mlog.log('Fetching value of define', mlog.bold(element, True), msg, value, cached)
          return value
  
      @permittedKwargs({
          'name',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def compiles_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('compiles method takes exactly one argument.')
          code = args[0]
          if isinstance(code, mesonlib.File):
              code = mesonlib.File.from_absolute_file(
                  code.rel_to_builddir(self.environment.source_dir))
          elif not isinstance(code, str):
              raise InvalidArguments('Argument must be string or file.')
          testname = kwargs.get('name', '')
          if not isinstance(testname, str):
              raise InterpreterException('Testname argument must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs, endl=None)
          result, cached = self.compiler.compiles(code, self.environment,
                                                  extra_args=extra_args,
                                                  dependencies=deps)
          if len(testname) > 0:
              if result:
                  h = mlog.green('YES')
              else:
                  h = mlog.red('NO')
              cached = mlog.blue('(cached)') if cached else ''
              mlog.log('Checking if', mlog.bold(testname, True), msg, 'compiles:', h, cached)
          return result
  
      @permittedKwargs({
          'name',
          'no_builtin_args',
          'include_directories',
          'args',
          'dependencies',
      })
      def links_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('links method takes exactly one argument.')
          code = args[0]
          if isinstance(code, mesonlib.File):
              code = mesonlib.File.from_absolute_file(
                  code.rel_to_builddir(self.environment.source_dir))
          elif not isinstance(code, str):
              raise InvalidArguments('Argument must be string or file.')
          testname = kwargs.get('name', '')
          if not isinstance(testname, str):
              raise InterpreterException('Testname argument must be a string.')
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs, endl=None)
          result, cached = self.compiler.links(code, self.environment,
                                               extra_args=extra_args,
                                               dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if len(testname) > 0:
              if result:
                  h = mlog.green('YES')
              else:
                  h = mlog.red('NO')
              mlog.log('Checking if', mlog.bold(testname, True), msg, 'links:', h, cached)
          return result
  
      @FeatureNew('compiler.check_header', '0.47.0')
      @FeatureNewKwargs('compiler.check_header', '0.50.0', ['required'])
      @permittedKwargs(header_permitted_kwargs)
      def check_header_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('check_header method takes exactly one argument.')
          check_stringlist(args)
          hname = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_header must be a string.')
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject, default=False)
          if disabled:
              mlog.log('Check usable header', mlog.bold(hname, True), 'skipped: feature', mlog.bold(feature), 'disabled')
              return False
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          haz, cached = self.compiler.check_header(hname, prefix, self.environment,
                                                   extra_args=extra_args,
                                                   dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if required and not haz:
              raise InterpreterException('{} header {!r} not usable'.format(self.compiler.get_display_language(), hname))
          elif haz:
              h = mlog.green('YES')
          else:
              h = mlog.red('NO')
          mlog.log('Check usable header', mlog.bold(hname, True), msg, h, cached)
          return haz
  
      @FeatureNewKwargs('compiler.has_header', '0.50.0', ['required'])
      @permittedKwargs(header_permitted_kwargs)
      def has_header_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('has_header method takes exactly one argument.')
          check_stringlist(args)
          hname = args[0]
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_header must be a string.')
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject, default=False)
          if disabled:
              mlog.log('Has header', mlog.bold(hname, True), 'skipped: feature', mlog.bold(feature), 'disabled')
              return False
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          haz, cached = self.compiler.has_header(hname, prefix, self.environment,
                                                 extra_args=extra_args, dependencies=deps)
          cached = mlog.blue('(cached)') if cached else ''
          if required and not haz:
              raise InterpreterException('{} header {!r} not found'.format(self.compiler.get_display_language(), hname))
          elif haz:
              h = mlog.green('YES')
          else:
              h = mlog.red('NO')
          mlog.log('Has header', mlog.bold(hname, True), msg, h, cached)
          return haz
  
      @FeatureNewKwargs('compiler.has_header_symbol', '0.50.0', ['required'])
      @permittedKwargs(header_permitted_kwargs)
      def has_header_symbol_method(self, args, kwargs):
          if len(args) != 2:
              raise InterpreterException('has_header_symbol method takes exactly two arguments.')
          check_stringlist(args)
          hname, symbol = args
          prefix = kwargs.get('prefix', '')
          if not isinstance(prefix, str):
              raise InterpreterException('Prefix argument of has_header_symbol must be a string.')
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject, default=False)
          if disabled:
              mlog.log('Header <{0}> has symbol'.format(hname), mlog.bold(symbol, True), 'skipped: feature', mlog.bold(feature), 'disabled')
              return False
          extra_args = functools.partial(self.determine_args, kwargs)
          deps, msg = self.determine_dependencies(kwargs)
          haz, cached = self.compiler.has_header_symbol(hname, symbol, prefix, self.environment,
                                                        extra_args=extra_args,
                                                        dependencies=deps)
          if required and not haz:
              raise InterpreterException('{} symbol {} not found in header {}'.format(self.compiler.get_display_language(), symbol, hname))
          elif haz:
              h = mlog.green('YES')
          else:
              h = mlog.red('NO')
          cached = mlog.blue('(cached)') if cached else ''
          mlog.log('Header <{0}> has symbol'.format(hname), mlog.bold(symbol, True), msg, h, cached)
          return haz
  
      def notfound_library(self, libname):
          lib = dependencies.ExternalLibrary(libname, None,
                                             self.environment,
                                             self.compiler.language,
                                             silent=True)
          return ExternalLibraryHolder(lib, self.subproject)
  
      @FeatureNewKwargs('compiler.find_library', '0.51.0', ['static'])
      @FeatureNewKwargs('compiler.find_library', '0.50.0', ['has_headers'])
      @FeatureNewKwargs('compiler.find_library', '0.49.0', ['disabler'])
      @disablerIfNotFound
      @permittedKwargs(find_library_permitted_kwargs)
      def find_library_method(self, args, kwargs):
          # TODO add dependencies support?
          if len(args) != 1:
              raise InterpreterException('find_library method takes one argument.')
          libname = args[0]
          if not isinstance(libname, str):
              raise InterpreterException('Library name not a string.')
  
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject)
          if disabled:
              mlog.log('Library', mlog.bold(libname), 'skipped: feature', mlog.bold(feature), 'disabled')
              return self.notfound_library(libname)
  
          has_header_kwargs = {k[7:]: v for k, v in kwargs.items() if k.startswith('header_')}
          has_header_kwargs['required'] = required
          headers = mesonlib.stringlistify(kwargs.get('has_headers', []))
          for h in headers:
              if not self.has_header_method([h], has_header_kwargs):
                  return self.notfound_library(libname)
  
          search_dirs = extract_search_dirs(kwargs)
  
          libtype = mesonlib.LibType.PREFER_SHARED
          if 'static' in kwargs:
              if not isinstance(kwargs['static'], bool):
                  raise InterpreterException('static must be a boolean')
              libtype = mesonlib.LibType.STATIC if kwargs['static'] else mesonlib.LibType.SHARED
          linkargs = self.compiler.find_library(libname, self.environment, search_dirs, libtype)
          if required and not linkargs:
              if libtype == mesonlib.LibType.PREFER_SHARED:
                  libtype = 'shared or static'
              else:
                  libtype = libtype.name.lower()
              raise InterpreterException('{} {} library {!r} not found'
                                         .format(self.compiler.get_display_language(),
                                                 libtype, libname))
          lib = dependencies.ExternalLibrary(libname, linkargs, self.environment,
                                             self.compiler.language)
          return ExternalLibraryHolder(lib, self.subproject)
  
      @permittedKwargs({})
      def has_argument_method(self, args: T.Sequence[str], kwargs) -> bool:
          args = mesonlib.stringlistify(args)
          if len(args) != 1:
              raise InterpreterException('has_argument takes exactly one argument.')
          return self.has_multi_arguments_method(args, kwargs)
  
      @permittedKwargs({})
      def has_multi_arguments_method(self, args: T.Sequence[str], kwargs: dict):
          args = mesonlib.stringlistify(args)
          result, cached = self.compiler.has_multi_arguments(args, self.environment)
          if result:
              h = mlog.green('YES')
          else:
              h = mlog.red('NO')
          cached = mlog.blue('(cached)') if cached else ''
          mlog.log(
              'Compiler for {} supports arguments {}:'.format(
                  self.compiler.get_display_language(), ' '.join(args)),
              h, cached)
          return result
  
      @FeatureNew('compiler.get_supported_arguments', '0.43.0')
      @permittedKwargs({})
      def get_supported_arguments_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          supported_args = []
          for arg in args:
              if self.has_argument_method(arg, kwargs):
                  supported_args.append(arg)
          return supported_args
  
      @permittedKwargs({})
      def first_supported_argument_method(self, args: T.Sequence[str], kwargs: dict) -> T.List[str]:
          for arg in mesonlib.stringlistify(args):
              if self.has_argument_method(arg, kwargs):
                  mlog.log('First supported argument:', mlog.bold(arg))
                  return [arg]
          mlog.log('First supported argument:', mlog.red('None'))
          return []
  
      @FeatureNew('compiler.has_link_argument', '0.46.0')
      @permittedKwargs({})
      def has_link_argument_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          if len(args) != 1:
              raise InterpreterException('has_link_argument takes exactly one argument.')
          return self.has_multi_link_arguments_method(args, kwargs)
  
      @FeatureNew('compiler.has_multi_link_argument', '0.46.0')
      @permittedKwargs({})
      def has_multi_link_arguments_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          result, cached = self.compiler.has_multi_link_arguments(args, self.environment)
          cached = mlog.blue('(cached)') if cached else ''
          if result:
              h = mlog.green('YES')
          else:
              h = mlog.red('NO')
          mlog.log(
              'Compiler for {} supports link arguments {}:'.format(
                  self.compiler.get_display_language(), ' '.join(args)),
              h, cached)
          return result
  
      @FeatureNew('compiler.get_supported_link_arguments_method', '0.46.0')
      @permittedKwargs({})
      def get_supported_link_arguments_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          supported_args = []
          for arg in args:
              if self.has_link_argument_method(arg, kwargs):
                  supported_args.append(arg)
          return supported_args
  
      @FeatureNew('compiler.first_supported_link_argument_method', '0.46.0')
      @permittedKwargs({})
      def first_supported_link_argument_method(self, args, kwargs):
          for i in mesonlib.stringlistify(args):
              if self.has_link_argument_method(i, kwargs):
                  mlog.log('First supported link argument:', mlog.bold(i))
                  return [i]
          mlog.log('First supported link argument:', mlog.red('None'))
          return []
  
      @FeatureNew('compiler.has_function_attribute', '0.48.0')
      @permittedKwargs({})
      def has_func_attribute_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          if len(args) != 1:
              raise InterpreterException('has_func_attribute takes exactly one argument.')
          result, cached = self.compiler.has_func_attribute(args[0], self.environment)
          cached = mlog.blue('(cached)') if cached else ''
          h = mlog.green('YES') if result else mlog.red('NO')
          mlog.log('Compiler for {} supports function attribute {}:'.format(self.compiler.get_display_language(), args[0]), h, cached)
          return result
  
      @FeatureNew('compiler.get_supported_function_attributes', '0.48.0')
      @permittedKwargs({})
      def get_supported_function_attributes_method(self, args, kwargs):
          args = mesonlib.stringlistify(args)
          return [a for a in args if self.has_func_attribute_method(a, kwargs)]
  
      @FeatureNew('compiler.get_argument_syntax_method', '0.49.0')
      @noPosargs
      @noKwargs
      def get_argument_syntax_method(self, args, kwargs):
          return self.compiler.get_argument_syntax()
  
  
  class ModuleState(T.NamedTuple):
  
      """Object passed to a module when it a method is called.
  
      holds the current state of the meson process at a given method call in
      the interpreter.
      """
  
      source_root: str
      build_to_src: str
      subproject: str
      subdir: str
      current_lineno: str
      environment: 'Environment'
      project_name: str
      project_version: str
      backend: str
      targets: T.Dict[str, build.Target]
      data: T.List[build.Data]
      headers: T.List[build.Headers]
      man: T.List[build.Man]
      global_args: T.Dict[str, T.List[str]]
      project_args: T.Dict[str, T.List[str]]
      build_machine: 'MachineInfo'
      host_machine: 'MachineInfo'
      target_machine: 'MachineInfo'
      current_node: mparser.BaseNode
  
  
  class ModuleHolder(InterpreterObject, ObjectHolder['ExtensionModule']):
      def __init__(self, modname: str, module: 'ExtensionModule', interpreter: 'Interpreter'):
          InterpreterObject.__init__(self)
          ObjectHolder.__init__(self, module)
          self.modname = modname
          self.interpreter = interpreter
  
      def method_call(self, method_name, args, kwargs):
          try:
              fn = getattr(self.held_object, method_name)
          except AttributeError:
              raise InvalidArguments('Module %s does not have method %s.' % (self.modname, method_name))
          if method_name.startswith('_'):
              raise InvalidArguments('Function {!r} in module {!r} is private.'.format(method_name, self.modname))
          if not getattr(fn, 'no-args-flattening', False):
              args = flatten(args)
          # This is not 100% reliable but we can't use hash()
          # because the Build object contains dicts and lists.
          num_targets = len(self.interpreter.build.targets)
          state = ModuleState(
              source_root = self.interpreter.environment.get_source_dir(),
              build_to_src=mesonlib.relpath(self.interpreter.environment.get_source_dir(),
                                            self.interpreter.environment.get_build_dir()),
              subproject=self.interpreter.subproject,
              subdir=self.interpreter.subdir,
              current_lineno=self.interpreter.current_lineno,
              environment=self.interpreter.environment,
              project_name=self.interpreter.build.project_name,
              project_version=self.interpreter.build.dep_manifest[self.interpreter.active_projectname],
              # The backend object is under-used right now, but we will need it:
              # https://github.com/mesonbuild/meson/issues/1419
              backend=self.interpreter.backend,
              targets=self.interpreter.build.targets,
              data=self.interpreter.build.data,
              headers=self.interpreter.build.get_headers(),
              man=self.interpreter.build.get_man(),
              #global_args_for_build = self.interpreter.build.global_args.build,
              global_args = self.interpreter.build.global_args.host,
              #project_args_for_build = self.interpreter.build.projects_args.build.get(self.interpreter.subproject, {}),
              project_args = self.interpreter.build.projects_args.host.get(self.interpreter.subproject, {}),
              build_machine=self.interpreter.builtin['build_machine'].held_object,
              host_machine=self.interpreter.builtin['host_machine'].held_object,
              target_machine=self.interpreter.builtin['target_machine'].held_object,
              current_node=self.current_node
          )
          # Many modules do for example self.interpreter.find_program_impl(),
          # so we have to ensure they use the current interpreter and not the one
          # that first imported that module, otherwise it will use outdated
          # overrides.
          self.held_object.interpreter = self.interpreter
          if self.held_object.is_snippet(method_name):
              value = fn(self.interpreter, state, args, kwargs)
              return self.interpreter.holderify(value)
          else:
              value = fn(state, args, kwargs)
              if num_targets != len(self.interpreter.build.targets):
                  raise InterpreterException('Extension module altered internal state illegally.')
              return self.interpreter.module_method_callback(value)
  
  
  class Summary:
      def __init__(self, project_name, project_version):
          self.project_name = project_name
          self.project_version = project_version
          self.sections = collections.defaultdict(dict)
          self.max_key_len = 0
  
      def add_section(self, section, values, kwargs, subproject):
          bool_yn = kwargs.get('bool_yn', False)
          if not isinstance(bool_yn, bool):
              raise InterpreterException('bool_yn keyword argument must be boolean')
          list_sep = kwargs.get('list_sep')
          if list_sep is not None and not isinstance(list_sep, str):
              raise InterpreterException('list_sep keyword argument must be string')
          for k, v in values.items():
              if k in self.sections[section]:
                  raise InterpreterException('Summary section {!r} already have key {!r}'.format(section, k))
              formatted_values = []
              for i in listify(v):
                  i = unholder(i)
                  if isinstance(i, bool) and bool_yn:
                      formatted_values.append(mlog.green('YES') if i else mlog.red('NO'))
                  elif isinstance(i, (str, int, bool)):
                      formatted_values.append(str(i))
                  elif isinstance(i, (ExternalProgram, Dependency)):
                      FeatureNew.single_use('dependency or external program in summary', '0.57.0', subproject)
                      formatted_values.append(i.summary_value())
                  elif isinstance(i, coredata.UserOption):
                      FeatureNew.single_use('feature option in summary', '0.58.0', subproject)
                      formatted_values.append(i.printable_value())
                  else:
                      m = 'Summary value in section {!r}, key {!r}, must be string, integer, boolean, dependency or external program'
                      raise InterpreterException(m.format(section, k))
              self.sections[section][k] = (formatted_values, list_sep)
              self.max_key_len = max(self.max_key_len, len(k))
  
      def dump(self):
          mlog.log(self.project_name, mlog.normal_cyan(self.project_version))
          for section, values in self.sections.items():
              mlog.log('')  # newline
              if section:
                  mlog.log(' ', mlog.bold(section))
              for k, v in values.items():
                  v, list_sep = v
                  padding = self.max_key_len - len(k)
                  end = ' ' if v else ''
                  mlog.log(' ' * 3, k + ' ' * padding + ':', end=end)
                  indent = self.max_key_len + 6
                  self.dump_value(v, list_sep, indent)
          mlog.log('')  # newline
  
      def dump_value(self, arr, list_sep, indent):
          lines_sep = '\n' + ' ' * indent
          if list_sep is None:
              mlog.log(*arr, sep=lines_sep)
              return
          max_len = shutil.get_terminal_size().columns
          line = []
          line_len = indent
          lines_sep = list_sep.rstrip() + lines_sep
          for v in arr:
              v_len = len(v) + len(list_sep)
              if line and line_len + v_len > max_len:
                  mlog.log(*line, sep=list_sep, end=lines_sep)
                  line_len = indent
                  line = []
              line.append(v)
              line_len += v_len
          mlog.log(*line, sep=list_sep)
  
  class MesonMain(InterpreterObject):
      def __init__(self, build: 'build.Build', interpreter: 'Interpreter'):
          InterpreterObject.__init__(self)
          self.build = build
          self.interpreter = interpreter
          self._found_source_scripts = {}
          self.methods.update({'get_compiler': self.get_compiler_method,
                               'is_cross_build': self.is_cross_build_method,
                               'has_exe_wrapper': self.has_exe_wrapper_method,
                               'can_run_host_binaries': self.can_run_host_binaries_method,
                               'is_unity': self.is_unity_method,
                               'is_subproject': self.is_subproject_method,
                               'current_source_dir': self.current_source_dir_method,
                               'current_build_dir': self.current_build_dir_method,
                               'source_root': self.source_root_method,
                               'build_root': self.build_root_method,
                               'project_source_root': self.project_source_root_method,
                               'project_build_root': self.project_build_root_method,
                               'add_install_script': self.add_install_script_method,
                               'add_postconf_script': self.add_postconf_script_method,
                               'add_dist_script': self.add_dist_script_method,
                               'install_dependency_manifest': self.install_dependency_manifest_method,
                               'override_dependency': self.override_dependency_method,
                               'override_find_program': self.override_find_program_method,
                               'project_version': self.project_version_method,
                               'project_license': self.project_license_method,
                               'version': self.version_method,
                               'project_name': self.project_name_method,
                               'get_cross_property': self.get_cross_property_method,
                               'get_external_property': self.get_external_property_method,
                               'has_external_property': self.has_external_property_method,
                               'backend': self.backend_method,
                               })
  
      def _find_source_script(self, prog: T.Union[str, mesonlib.File, ExecutableHolder], args):
          if isinstance(prog, (ExecutableHolder, ExternalProgramHolder)):
              return self.interpreter.backend.get_executable_serialisation([unholder(prog)] + args)
          # Prefer scripts in the current source directory
          search_dir = os.path.join(self.interpreter.environment.source_dir,
                                    self.interpreter.subdir)
          key = (prog, search_dir)
          if key in self._found_source_scripts:
              found = self._found_source_scripts[key]
          elif isinstance(prog, mesonlib.File):
              prog = prog.rel_to_builddir(self.interpreter.environment.source_dir)
              found = dependencies.ExternalProgram(prog, search_dir=self.interpreter.environment.build_dir)
          else:
              found = dependencies.ExternalProgram(prog, search_dir=search_dir)
  
          if found.found():
              self._found_source_scripts[key] = found
          else:
              m = 'Script or command {!r} not found or not executable'
              raise InterpreterException(m.format(prog))
          es = self.interpreter.backend.get_executable_serialisation([found] + args)
          es.subproject = self.interpreter.subproject
          return es
  
      def _process_script_args(
              self, name: str, args: T.List[T.Union[
                  str, mesonlib.File, CustomTargetHolder,
                  CustomTargetIndexHolder, ConfigureFileHolder,
                  ExternalProgramHolder, ExecutableHolder,
              ]], allow_built: bool = False) -> T.List[str]:
          script_args = []  # T.List[str]
          new = False
          for a in args:
              a = unholder(a)
              if isinstance(a, str):
                  script_args.append(a)
              elif isinstance(a, mesonlib.File):
                  new = True
                  script_args.append(a.rel_to_builddir(self.interpreter.environment.source_dir))
              elif isinstance(a, (build.BuildTarget, build.CustomTarget, build.CustomTargetIndex)):
                  if not allow_built:
                      raise InterpreterException('Arguments to {} cannot be built'.format(name))
                  new = True
                  script_args.extend([os.path.join(a.get_subdir(), o) for o in a.get_outputs()])
  
                  # This feels really hacky, but I'm not sure how else to fix
                  # this without completely rewriting install script handling.
                  # This is complicated by the fact that the install target
                  # depends on all.
                  if isinstance(a, build.CustomTargetIndex):
                      a.target.build_by_default = True
                  else:
                      a.build_by_default = True
              elif isinstance(a, build.ConfigureFile):
                  new = True
                  script_args.append(os.path.join(a.subdir, a.targetname))
              elif isinstance(a, dependencies.ExternalProgram):
                  script_args.extend(a.command)
                  new = True
              else:
                  raise InterpreterException(
                      'Arguments to {} must be strings, Files, CustomTargets, '
                      'Indexes of CustomTargets, or ConfigureFiles'.format(name))
          if new:
              FeatureNew.single_use(
                  'Calling "{}" with File, CustomTaget, Index of CustomTarget, '
                  'ConfigureFile, Executable, or ExternalProgram'.format(name),
                  '0.55.0', self.interpreter.subproject)
          return script_args
  
      @FeatureNewKwargs('add_install_script', '0.57.0', ['skip_if_destdir'])
      @permittedKwargs({'skip_if_destdir'})
      def add_install_script_method(self, args: 'T.Tuple[T.Union[str, mesonlib.File, ExecutableHolder], T.Union[str, mesonlib.File, CustomTargetHolder, CustomTargetIndexHolder, ConfigureFileHolder], ...]', kwargs):
          if len(args) < 1:
              raise InterpreterException('add_install_script takes one or more arguments')
          if isinstance(args[0], mesonlib.File):
              FeatureNew.single_use('Passing file object to script parameter of add_install_script',
                                    '0.57.0', self.interpreter.subproject)
          skip_if_destdir = kwargs.get('skip_if_destdir', False)
          if not isinstance(skip_if_destdir, bool):
              raise InterpreterException('skip_if_destdir keyword argument must be boolean')
          script_args = self._process_script_args('add_install_script', args[1:], allow_built=True)
          script = self._find_source_script(args[0], script_args)
          script.skip_if_destdir = skip_if_destdir
          self.build.install_scripts.append(script)
  
      @permittedKwargs(set())
      def add_postconf_script_method(self, args, kwargs):
          if len(args) < 1:
              raise InterpreterException('add_postconf_script takes one or more arguments')
          if isinstance(args[0], mesonlib.File):
              FeatureNew.single_use('Passing file object to script parameter of add_postconf_script',
                                    '0.57.0', self.interpreter.subproject)
          script_args = self._process_script_args('add_postconf_script', args[1:], allow_built=True)
          script = self._find_source_script(args[0], script_args)
          self.build.postconf_scripts.append(script)
  
      @permittedKwargs(set())
      def add_dist_script_method(self, args, kwargs):
          if len(args) < 1:
              raise InterpreterException('add_dist_script takes one or more arguments')
          if len(args) > 1:
              FeatureNew.single_use('Calling "add_dist_script" with multiple arguments',
                                    '0.49.0', self.interpreter.subproject)
          if isinstance(args[0], mesonlib.File):
              FeatureNew.single_use('Passing file object to script parameter of add_dist_script',
                                    '0.57.0', self.interpreter.subproject)
          if self.interpreter.subproject != '':
              raise InterpreterException('add_dist_script may not be used in a subproject.')
          script_args = self._process_script_args('add_dist_script', args[1:], allow_built=True)
          script = self._find_source_script(args[0], script_args)
          self.build.dist_scripts.append(script)
  
      @noPosargs
      @permittedKwargs({})
      def current_source_dir_method(self, args, kwargs):
          src = self.interpreter.environment.source_dir
          sub = self.interpreter.subdir
          if sub == '':
              return src
          return os.path.join(src, sub)
  
      @noPosargs
      @permittedKwargs({})
      def current_build_dir_method(self, args, kwargs):
          src = self.interpreter.environment.build_dir
          sub = self.interpreter.subdir
          if sub == '':
              return src
          return os.path.join(src, sub)
  
      @noPosargs
      @permittedKwargs({})
      def backend_method(self, args, kwargs):
          return self.interpreter.backend.name
  
      @noPosargs
      @permittedKwargs({})
      @FeatureDeprecated('meson.source_root', '0.56.0', 'use meson.current_source_dir instead.')
      def source_root_method(self, args, kwargs):
          return self.interpreter.environment.source_dir
  
      @noPosargs
      @permittedKwargs({})
      @FeatureDeprecated('meson.build_root', '0.56.0', 'use meson.current_build_dir instead.')
      def build_root_method(self, args, kwargs):
          return self.interpreter.environment.build_dir
  
      @noPosargs
      @permittedKwargs({})
      @FeatureNew('meson.project_source_root', '0.56.0')
      def project_source_root_method(self, args, kwargs):
          src = self.interpreter.environment.source_dir
          sub = self.interpreter.root_subdir
          if sub == '':
              return src
          return os.path.join(src, sub)
  
      @noPosargs
      @permittedKwargs({})
      @FeatureNew('meson.project_build_root', '0.56.0')
      def project_build_root_method(self, args, kwargs):
          src = self.interpreter.environment.build_dir
          sub = self.interpreter.root_subdir
          if sub == '':
              return src
          return os.path.join(src, sub)
  
      @noPosargs
      @permittedKwargs({})
      @FeatureDeprecated('meson.has_exe_wrapper', '0.55.0', 'use meson.can_run_host_binaries instead.')
      def has_exe_wrapper_method(self, args: T.Tuple[object, ...], kwargs: T.Dict[str, object]) -> bool:
          return self.can_run_host_binaries_impl(args, kwargs)
  
      @noPosargs
      @permittedKwargs({})
      @FeatureNew('meson.can_run_host_binaries', '0.55.0')
      def can_run_host_binaries_method(self, args: T.Tuple[object, ...], kwargs: T.Dict[str, object]) -> bool:
          return self.can_run_host_binaries_impl(args, kwargs)
  
      def can_run_host_binaries_impl(self, args, kwargs):
          if (self.is_cross_build_method(None, None) and
                  self.build.environment.need_exe_wrapper()):
              if self.build.environment.exe_wrapper is None:
                  return False
          # We return True when exe_wrap is defined, when it's not needed, and
          # when we're compiling natively. The last two are semantically confusing.
          # Need to revisit this.
          return True
  
      @noPosargs
      @permittedKwargs({})
      def is_cross_build_method(self, args, kwargs):
          return self.build.environment.is_cross_build()
  
      @permittedKwargs({'native'})
      def get_compiler_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('get_compiler_method must have one and only one argument.')
          cname = args[0]
          for_machine = Interpreter.machine_from_native_kwarg(kwargs)
          clist = self.interpreter.coredata.compilers[for_machine]
          if cname in clist:
              return CompilerHolder(clist[cname], self.build.environment, self.interpreter.subproject)
          raise InterpreterException('Tried to access compiler for language "%s", not specified for %s machine.' % (cname, for_machine.get_lower_case_name()))
  
      @noPosargs
      @permittedKwargs({})
      def is_unity_method(self, args, kwargs):
          optval = self.interpreter.environment.coredata.get_option(OptionKey('unity'))
          if optval == 'on' or (optval == 'subprojects' and self.interpreter.is_subproject()):
              return True
          return False
  
      @noPosargs
      @permittedKwargs({})
      def is_subproject_method(self, args, kwargs):
          return self.interpreter.is_subproject()
  
      @permittedKwargs({})
      def install_dependency_manifest_method(self, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Must specify manifest install file name')
          if not isinstance(args[0], str):
              raise InterpreterException('Argument must be a string.')
          self.build.dep_manifest_name = args[0]
  
      @FeatureNew('meson.override_find_program', '0.46.0')
      @permittedKwargs({})
      def override_find_program_method(self, args, kwargs):
          if len(args) != 2:
              raise InterpreterException('Override needs two arguments')
          name, exe = args
          if not isinstance(name, str):
              raise InterpreterException('First argument must be a string')
          exe = unholder(exe)
          if isinstance(exe, mesonlib.File):
              abspath = exe.absolute_path(self.interpreter.environment.source_dir,
                                          self.interpreter.environment.build_dir)
              if not os.path.exists(abspath):
                  raise InterpreterException('Tried to override %s with a file that does not exist.' % name)
              exe = OverrideProgram(name, abspath)
          if not isinstance(exe, (dependencies.ExternalProgram, build.Executable)):
              raise InterpreterException('Second argument must be an external program or executable.')
          self.interpreter.add_find_program_override(name, exe)
  
      @FeatureNew('meson.override_dependency', '0.54.0')
      @permittedKwargs({'native'})
      def override_dependency_method(self, args, kwargs):
          if len(args) != 2:
              raise InterpreterException('Override needs two arguments')
          name = args[0]
          dep = args[1]
          if not isinstance(name, str) or not name:
              raise InterpreterException('First argument must be a string and cannot be empty')
          dep = unholder(dep)
          if not isinstance(dep, dependencies.Dependency):
              raise InterpreterException('Second argument must be a dependency object')
          identifier = dependencies.get_dep_identifier(name, kwargs)
          for_machine = self.interpreter.machine_from_native_kwarg(kwargs)
          override = self.build.dependency_overrides[for_machine].get(identifier)
          if override:
              m = 'Tried to override dependency {!r} which has already been resolved or overridden at {}'
              location = mlog.get_error_location_string(override.node.filename, override.node.lineno)
              raise InterpreterException(m.format(name, location))
          self.build.dependency_overrides[for_machine][identifier] = \
              build.DependencyOverride(dep, self.interpreter.current_node)
  
      @noPosargs
      @permittedKwargs({})
      def project_version_method(self, args, kwargs):
          return self.build.dep_manifest[self.interpreter.active_projectname]['version']
  
      @FeatureNew('meson.project_license()', '0.45.0')
      @noPosargs
      @permittedKwargs({})
      def project_license_method(self, args, kwargs):
          return self.build.dep_manifest[self.interpreter.active_projectname]['license']
  
      @noPosargs
      @permittedKwargs({})
      def version_method(self, args, kwargs):
          return MesonVersionString(coredata.version)
  
      @noPosargs
      @permittedKwargs({})
      def project_name_method(self, args, kwargs):
          return self.interpreter.active_projectname
  
      def __get_external_property_impl(self, propname: str, fallback: T.Optional[object], machine: MachineChoice) -> object:
          """Shared implementation for get_cross_property and get_external_property."""
          try:
              return self.interpreter.environment.properties[machine][propname]
          except KeyError:
              if fallback is not None:
                  return fallback
              raise InterpreterException(f'Unknown property for {machine.get_lower_case_name()} machine: {propname}')
  
      @noArgsFlattening
      @permittedKwargs({})
      @FeatureDeprecated('meson.get_cross_property', '0.58.0', 'Use meson.get_external_property() instead')
      @typed_pos_args('meson.get_cross_property', str, optargs=[object])
      def get_cross_property_method(self, args: T.Tuple[str, T.Optional[object]], kwargs: T.Dict[str, T.Any]) -> object:
          propname, fallback = args
          return self.__get_external_property_impl(propname, fallback, MachineChoice.HOST)
  
      @noArgsFlattening
      @permittedKwargs({'native'})
      @FeatureNew('meson.get_external_property', '0.54.0')
      @typed_pos_args('meson.get_external_property', str, optargs=[object])
      def get_external_property_method(self, args: T.Tuple[str, T.Optional[object]], kwargs: T.Dict[str, T.Any]) -> object:
          propname, fallback = args
          machine = self.interpreter.machine_from_native_kwarg(kwargs)
          return self.__get_external_property_impl(propname, fallback, machine)
  
  
      @permittedKwargs({'native'})
      @FeatureNew('meson.has_external_property', '0.58.0')
      @typed_pos_args('meson.has_external_property', str)
      def has_external_property_method(self, args: T.Tuple[str], kwargs: T.Dict[str, T.Any]) -> str:
          prop_name = args[0]
          for_machine = self.interpreter.machine_from_native_kwarg(kwargs)
          return prop_name in self.interpreter.environment.properties[for_machine]
  
  known_library_kwargs = (
      build.known_shlib_kwargs |
      build.known_stlib_kwargs
  )
  
  known_build_target_kwargs = (
      known_library_kwargs |
      build.known_exe_kwargs |
      build.known_jar_kwargs |
      {'target_type'}
  )
  
  _base_test_args = {'args', 'depends', 'env', 'should_fail', 'timeout', 'workdir', 'suite', 'priority', 'protocol'}
  
  permitted_kwargs = {'add_global_arguments': {'language', 'native'},
                      'add_global_link_arguments': {'language', 'native'},
                      'add_languages': {'required', 'native'},
                      'add_project_link_arguments': {'language', 'native'},
                      'add_project_arguments': {'language', 'native'},
                      'add_test_setup': {'exe_wrapper', 'gdb', 'timeout_multiplier', 'env', 'is_default',
                                         'exclude_suites'},
                      'benchmark': _base_test_args,
                      'build_target': known_build_target_kwargs,
                      'configure_file': {'input',
                                         'output',
                                         'configuration',
                                         'command',
                                         'copy',
                                         'depfile',
                                         'install_dir',
                                         'install_mode',
                                         'capture',
                                         'install',
                                         'format',
                                         'output_format',
                                         'encoding'},
                      'custom_target': {'input',
                                        'output',
                                        'command',
                                        'install',
                                        'install_dir',
                                        'install_mode',
                                        'build_always',
                                        'capture',
                                        'depends',
                                        'depend_files',
                                        'depfile',
                                        'build_by_default',
                                        'build_always_stale',
                                        'console',
                                        'env'},
                      'dependency': {'default_options',
                                     'embed',
                                     'fallback',
                                     'language',
                                     'main',
                                     'method',
                                     'modules',
                                     'components',
                                     'cmake_module_path',
                                     'optional_modules',
                                     'native',
                                     'not_found_message',
                                     'required',
                                     'static',
                                     'version',
                                     'private_headers',
                                     'cmake_args',
                                     'cmake_package_version',
                                     'include_type',
                                     },
                      'declare_dependency': {'include_directories',
                                             'link_with',
                                             'sources',
                                             'dependencies',
                                             'compile_args',
                                             'link_args',
                                             'link_whole',
                                             'version',
                                             'variables',
                                             },
                      'executable': build.known_exe_kwargs,
                      'find_program': {'required', 'native', 'version', 'dirs'},
                      'generator': {'arguments',
                                    'output',
                                    'depends',
                                    'depfile',
                                    'capture',
                                    'preserve_path_from'},
                      'include_directories': {'is_system'},
                      'install_data': {'install_dir', 'install_mode', 'rename', 'sources'},
                      'install_headers': {'install_dir', 'install_mode', 'subdir'},
                      'install_man': {'install_dir', 'install_mode', 'locale'},
                      'install_subdir': {'exclude_files', 'exclude_directories', 'install_dir', 'install_mode', 'strip_directory'},
                      'jar': build.known_jar_kwargs,
                      'project': {'version', 'meson_version', 'default_options', 'license', 'subproject_dir'},
                      'run_command': {'check', 'capture', 'env'},
                      'run_target': {'command', 'depends', 'env'},
                      'shared_library': build.known_shlib_kwargs,
                      'shared_module': build.known_shmod_kwargs,
                      'static_library': build.known_stlib_kwargs,
                      'both_libraries': known_library_kwargs,
                      'library': known_library_kwargs,
                      'subdir': {'if_found'},
                      'subproject': {'version', 'default_options', 'required'},
                      'test': set.union(_base_test_args, {'is_parallel'}),
                      'vcs_tag': {'input', 'output', 'fallback', 'command', 'replace_string'},
                      }
  
  
  class Interpreter(InterpreterBase):
  
      def __init__(
                  self,
                  build: build.Build,
                  backend: T.Optional[Backend] = None,
                  subproject: str = '',
                  subdir: str = '',
                  subproject_dir: str = 'subprojects',
                  modules: T.Optional[T.Dict[str, ExtensionModule]] = None,
                  default_project_options: T.Optional[T.Dict[str, str]] = None,
                  mock: bool = False,
                  ast: T.Optional[mparser.CodeBlockNode] = None,
                  is_translated: bool = False,
              ) -> None:
          super().__init__(build.environment.get_source_dir(), subdir, subproject)
          self.an_unpicklable_object = mesonlib.an_unpicklable_object
          self.build = build
          self.environment = build.environment
          self.coredata = self.environment.get_coredata()
          self.backend = backend
          self.summary = {}
          if modules is None:
              self.modules = {}
          else:
              self.modules = modules
          # Subproject directory is usually the name of the subproject, but can
          # be different for dependencies provided by wrap files.
          self.subproject_directory_name = subdir.split(os.path.sep)[-1]
          self.subproject_dir = subproject_dir
          self.option_file = os.path.join(self.source_root, self.subdir, 'meson_options.txt')
          if not mock and ast is None:
              self.load_root_meson_file()
              self.sanity_check_ast()
          elif ast is not None:
              self.ast = ast
              self.sanity_check_ast()
          self.builtin.update({'meson': MesonMain(build, self)})
          self.generators = []
          self.visited_subdirs = {}
          self.project_args_frozen = False
          self.global_args_frozen = False  # implies self.project_args_frozen
          self.subprojects = {}
          self.subproject_stack = []
          self.configure_file_outputs = {}
          # Passed from the outside, only used in subprojects.
          if default_project_options:
              self.default_project_options = default_project_options.copy()
          else:
              self.default_project_options = {}
          self.project_default_options = {}
          self.build_func_dict()
  
          # build_def_files needs to be defined before parse_project is called
          #
          # For non-meson subprojects, we'll be using the ast. Even if it does
          # exist we don't want to add a dependency on it, it's autogenerated
          # from the actual build files, and is just for reference.
          self.build_def_files = []
          build_filename = os.path.join(self.subdir, environment.build_filename)
          if not is_translated:
              self.build_def_files.append(build_filename)
          if not mock:
              self.parse_project()
          self._redetect_machines()
  
      def _redetect_machines(self):
          # Re-initialize machine descriptions. We can do a better job now because we
          # have the compilers needed to gain more knowledge, so wipe out old
          # inference and start over.
          machines = self.build.environment.machines.miss_defaulting()
          machines.build = environment.detect_machine_info(self.coredata.compilers.build)
          self.build.environment.machines = machines.default_missing()
          assert self.build.environment.machines.build.cpu is not None
          assert self.build.environment.machines.host.cpu is not None
          assert self.build.environment.machines.target.cpu is not None
  
          self.builtin['build_machine'] = \
              MachineHolder(self.build.environment.machines.build)
          self.builtin['host_machine'] = \
              MachineHolder(self.build.environment.machines.host)
          self.builtin['target_machine'] = \
              MachineHolder(self.build.environment.machines.target)
  
      # TODO: Why is this in interpreter.py and not CoreData or Environment?
      def get_non_matching_default_options(self) -> T.Iterator[T.Tuple[str, str, coredata.UserOption]]:
          for def_opt_name, def_opt_value in self.project_default_options.items():
              cur_opt_value = self.coredata.options.get(def_opt_name)
              if cur_opt_value is not None and def_opt_value != cur_opt_value.value:
                  yield (str(def_opt_name), def_opt_value, cur_opt_value)
  
      def build_func_dict(self):
          self.funcs.update({'add_global_arguments': self.func_add_global_arguments,
                             'add_project_arguments': self.func_add_project_arguments,
                             'add_global_link_arguments': self.func_add_global_link_arguments,
                             'add_project_link_arguments': self.func_add_project_link_arguments,
                             'add_test_setup': self.func_add_test_setup,
                             'add_languages': self.func_add_languages,
                             'alias_target': self.func_alias_target,
                             'assert': self.func_assert,
                             'benchmark': self.func_benchmark,
                             'build_target': self.func_build_target,
                             'configuration_data': self.func_configuration_data,
                             'configure_file': self.func_configure_file,
                             'custom_target': self.func_custom_target,
                             'declare_dependency': self.func_declare_dependency,
                             'dependency': self.func_dependency,
                             'disabler': self.func_disabler,
                             'environment': self.func_environment,
                             'error': self.func_error,
                             'executable': self.func_executable,
                             'generator': self.func_generator,
                             'gettext': self.func_gettext,
                             'get_option': self.func_get_option,
                             'get_variable': self.func_get_variable,
                             'files': self.func_files,
                             'find_library': self.func_find_library,
                             'find_program': self.func_find_program,
                             'include_directories': self.func_include_directories,
                             'import': self.func_import,
                             'install_data': self.func_install_data,
                             'install_headers': self.func_install_headers,
                             'install_man': self.func_install_man,
                             'install_subdir': self.func_install_subdir,
                             'is_disabler': self.func_is_disabler,
                             'is_variable': self.func_is_variable,
                             'jar': self.func_jar,
                             'join_paths': self.func_join_paths,
                             'library': self.func_library,
                             'message': self.func_message,
                             'warning': self.func_warning,
                             'option': self.func_option,
                             'project': self.func_project,
                             'run_target': self.func_run_target,
                             'run_command': self.func_run_command,
                             'set_variable': self.func_set_variable,
                             'subdir': self.func_subdir,
                             'subdir_done': self.func_subdir_done,
                             'subproject': self.func_subproject,
                             'summary': self.func_summary,
                             'shared_library': self.func_shared_lib,
                             'shared_module': self.func_shared_module,
                             'static_library': self.func_static_lib,
                             'both_libraries': self.func_both_lib,
                             'test': self.func_test,
                             'vcs_tag': self.func_vcs_tag
                             })
          if 'MESON_UNIT_TEST' in os.environ:
              self.funcs.update({'exception': self.func_exception})
  
      def holderify(self, item):
          if isinstance(item, list):
              return [self.holderify(x) for x in item]
          if isinstance(item, dict):
              return {k: self.holderify(v) for k, v in item.items()}
  
          if isinstance(item, build.CustomTarget):
              return CustomTargetHolder(item, self)
          elif isinstance(item, (int, str, bool, Disabler, InterpreterObject)) or item is None:
              return item
          elif isinstance(item, build.Executable):
              return ExecutableHolder(item, self)
          elif isinstance(item, build.GeneratedList):
              return GeneratedListHolder(item)
          elif isinstance(item, build.RunTarget):
              raise RuntimeError('This is not a pipe.')
          elif isinstance(item, ExecutableSerialisation):
              raise RuntimeError('Do not do this.')
          elif isinstance(item, build.Data):
              return DataHolder(item)
          elif isinstance(item, dependencies.Dependency):
              return DependencyHolder(item, self.subproject)
          elif isinstance(item, dependencies.ExternalProgram):
              return ExternalProgramHolder(item, self.subproject)
          elif isinstance(item, (InterpreterObject, ObjectHolder)):
              return item
          else:
              raise InterpreterException('Module returned a value of unknown type.')
  
      def process_new_values(self, invalues):
          invalues = listify(invalues)
          for v in invalues:
              if isinstance(v, (RunTargetHolder, CustomTargetHolder, BuildTargetHolder)):
                  v = v.held_object
  
              if isinstance(v, (build.BuildTarget, build.CustomTarget, build.RunTarget)):
                  self.add_target(v.name, v)
              elif isinstance(v, list):
                  self.module_method_callback(v)
              elif isinstance(v, build.GeneratedList):
                  pass
              elif isinstance(v, ExecutableSerialisation):
                  v.subproject = self.subproject
                  self.build.install_scripts.append(v)
              elif isinstance(v, build.Data):
                  self.build.data.append(v)
              elif isinstance(v, dependencies.ExternalProgram):
                  return ExternalProgramHolder(v, self.subproject)
              elif isinstance(v, dependencies.InternalDependency):
                  # FIXME: This is special cased and not ideal:
                  # The first source is our new VapiTarget, the rest are deps
                  self.process_new_values(v.sources[0])
              elif isinstance(v, build.InstallDir):
                  self.build.install_dirs.append(v)
                  return InstallDirHolder(v)
              elif isinstance(v, Test):
                  self.build.tests.append(v)
              elif isinstance(v, (int, str, bool, Disabler, ObjectHolder)):
                  pass
              else:
                  raise InterpreterException('Module returned a value of unknown type.')
  
      def module_method_callback(self, return_object):
          if not isinstance(return_object, ModuleReturnValue):
              raise InterpreterException('Bug in module, it returned an invalid object')
          invalues = return_object.new_objects
          self.process_new_values(invalues)
          return self.holderify(return_object.return_value)
  
      def get_build_def_files(self) -> T.List[str]:
          return self.build_def_files
  
      def add_build_def_file(self, f: mesonlib.FileOrString) -> None:
          # Use relative path for files within source directory, and absolute path
          # for system files. Skip files within build directory. Also skip not regular
          # files (e.g. /dev/stdout) Normalize the path to avoid duplicates, this
          # is especially important to convert '/' to '\' on Windows.
          if isinstance(f, mesonlib.File):
              if f.is_built:
                  return
              f = os.path.normpath(f.relative_name())
          elif os.path.isfile(f) and not f.startswith('/dev'):
              srcdir = Path(self.environment.get_source_dir())
              builddir = Path(self.environment.get_build_dir())
              try:
                  f = Path(f).resolve()
              except OSError:
                  f = Path(f)
                  s = f.stat()
                  if (hasattr(s, 'st_file_attributes') and
                          s.st_file_attributes & stat.FILE_ATTRIBUTE_REPARSE_POINT != 0 and
                          s.st_reparse_tag == stat.IO_REPARSE_TAG_APPEXECLINK):
                      # This is a Windows Store link which we can't
                      # resolve, so just do our best otherwise.
                      f = f.parent.resolve() / f.name
                  else:
                      raise
              if builddir in f.parents:
                  return
              if srcdir in f.parents:
                  f = f.relative_to(srcdir)
              f = str(f)
          else:
              return
          if f not in self.build_def_files:
              self.build_def_files.append(f)
  
      def get_variables(self):
          return self.variables
  
      def check_stdlibs(self):
          machine_choices = [MachineChoice.HOST]
          if self.coredata.is_cross_build():
              machine_choices.append(MachineChoice.BUILD)
          for for_machine in machine_choices:
              props = self.build.environment.properties[for_machine]
              for l in self.coredata.compilers[for_machine].keys():
                  try:
                      di = mesonlib.stringlistify(props.get_stdlib(l))
                  except KeyError:
                      continue
                  if len(di) == 1:
                      FeatureNew.single_use('stdlib without variable name', '0.56.0', self.subproject)
                  kwargs = {'fallback': di,
                            'native': for_machine is MachineChoice.BUILD,
                            }
                  name = display_name = l + '_stdlib'
                  dep = self.dependency_impl(name, display_name, kwargs, force_fallback=True)
                  self.build.stdlibs[for_machine][l] = dep
  
      def import_module(self, modname):
          if modname in self.modules:
              return
          try:
              module = importlib.import_module('mesonbuild.modules.' + modname)
          except ImportError:
              raise InvalidArguments('Module "%s" does not exist' % (modname, ))
          ext_module = module.initialize(self)
          assert isinstance(ext_module, ExtensionModule)
          self.modules[modname] = ext_module
  
      @stringArgs
      @noKwargs
      def func_import(self, node, args, kwargs):
          if len(args) != 1:
              raise InvalidCode('Import takes one argument.')
          modname = args[0]
          if modname.startswith('unstable-'):
              plainname = modname.split('-', 1)[1]
              try:
                  # check if stable module exists
                  self.import_module(plainname)
                  mlog.warning('Module %s is now stable, please use the %s module instead.' % (modname, plainname))
                  modname = plainname
              except InvalidArguments:
                  mlog.warning('Module %s has no backwards or forwards compatibility and might not exist in future releases.' % modname, location=node)
                  modname = 'unstable_' + plainname
          self.import_module(modname)
          return ModuleHolder(modname, self.modules[modname], self)
  
      @stringArgs
      @noKwargs
      def func_files(self, node, args, kwargs):
          return [mesonlib.File.from_source_file(self.environment.source_dir, self.subdir, fname) for fname in args]
  
      # Used by declare_dependency() and pkgconfig.generate()
      def extract_variables(self, kwargs, argname='variables', list_new=False, dict_new=False):
          variables = kwargs.get(argname, {})
          if isinstance(variables, dict):
              if dict_new and variables:
                  FeatureNew.single_use('variables as dictionary', '0.56.0', self.subproject)
          else:
              varlist = mesonlib.stringlistify(variables)
              if list_new:
                  FeatureNew.single_use('variables as list of strings', '0.56.0', self.subproject)
              variables = collections.OrderedDict()
              for v in varlist:
                  try:
                      (key, value) = v.split('=', 1)
                  except ValueError:
                      raise InterpreterException('Variable {!r} must have a value separated by equals sign.'.format(v))
                  variables[key.strip()] = value.strip()
          for k, v in variables.items():
              if not k or not v:
                  raise InterpreterException('Empty variable name or value')
              if any(c.isspace() for c in k):
                  raise InterpreterException('Invalid whitespace in variable name "{}"'.format(k))
              if not isinstance(v, str):
                  raise InterpreterException('variables values must be strings.')
          return variables
  
      @FeatureNewKwargs('declare_dependency', '0.46.0', ['link_whole'])
      @FeatureNewKwargs('declare_dependency', '0.54.0', ['variables'])
      @permittedKwargs(permitted_kwargs['declare_dependency'])
      @noPosargs
      def func_declare_dependency(self, node, args, kwargs):
          version = kwargs.get('version', self.project_version)
          if not isinstance(version, str):
              raise InterpreterException('Version must be a string.')
          incs = self.extract_incdirs(kwargs)
          libs = unholder(extract_as_list(kwargs, 'link_with'))
          libs_whole = unholder(extract_as_list(kwargs, 'link_whole'))
          sources = extract_as_list(kwargs, 'sources')
          sources = unholder(listify(self.source_strings_to_files(sources)))
          deps = unholder(extract_as_list(kwargs, 'dependencies'))
          compile_args = mesonlib.stringlistify(kwargs.get('compile_args', []))
          link_args = mesonlib.stringlistify(kwargs.get('link_args', []))
          variables = self.extract_variables(kwargs, list_new=True)
          final_deps = []
          for d in deps:
              try:
                  d = d.held_object
              except Exception:
                  pass
              if not isinstance(d, (dependencies.Dependency, dependencies.ExternalLibrary, dependencies.InternalDependency)):
                  raise InterpreterException('Dependencies must be external deps')
              final_deps.append(d)
          for l in libs:
              if isinstance(l, dependencies.Dependency):
                  raise InterpreterException('''Entries in "link_with" may only be self-built targets,
  external dependencies (including libraries) must go to "dependencies".''')
          dep = dependencies.InternalDependency(version, incs, compile_args,
                                                link_args, libs, libs_whole, sources, final_deps,
                                                variables)
          return DependencyHolder(dep, self.subproject)
  
      @noKwargs
      def func_assert(self, node, args, kwargs):
          if len(args) == 1:
              FeatureNew.single_use('assert function without message argument', '0.53.0', self.subproject)
              value = args[0]
              message = None
          elif len(args) == 2:
              value, message = args
              if not isinstance(message, str):
                  raise InterpreterException('Assert message not a string.')
          else:
              raise InterpreterException('Assert takes between one and two arguments')
          if not isinstance(value, bool):
              raise InterpreterException('Assert value not bool.')
          if not value:
              if message is None:
                  from .ast import AstPrinter
                  printer = AstPrinter()
                  node.args.arguments[0].accept(printer)
                  message = printer.result
              raise InterpreterException('Assert failed: ' + message)
  
      def validate_arguments(self, args, argcount, arg_types):
          if argcount is not None:
              if argcount != len(args):
                  raise InvalidArguments('Expected %d arguments, got %d.' %
                                         (argcount, len(args)))
          for actual, wanted in zip(args, arg_types):
              if wanted is not None:
                  if not isinstance(actual, wanted):
                      raise InvalidArguments('Incorrect argument type.')
  
      @FeatureNewKwargs('run_command', '0.50.0', ['env'])
      @FeatureNewKwargs('run_command', '0.47.0', ['check', 'capture'])
      @permittedKwargs(permitted_kwargs['run_command'])
      def func_run_command(self, node, args, kwargs):
          return self.run_command_impl(node, args, kwargs)
  
      def run_command_impl(self, node, args, kwargs, in_builddir=False):
          if len(args) < 1:
              raise InterpreterException('Not enough arguments')
          cmd, *cargs = args
          capture = kwargs.get('capture', True)
          srcdir = self.environment.get_source_dir()
          builddir = self.environment.get_build_dir()
  
          check = kwargs.get('check', False)
          if not isinstance(check, bool):
              raise InterpreterException('Check must be boolean.')
  
          env = self.unpack_env_kwarg(kwargs)
  
          m = 'must be a string, or the output of find_program(), files() '\
              'or configure_file(), or a compiler object; not {!r}'
          expanded_args = []
          if isinstance(cmd, ExternalProgramHolder):
              cmd = cmd.held_object
              if isinstance(cmd, build.Executable):
                  progname = node.args.arguments[0].value
                  msg = 'Program {!r} was overridden with the compiled executable {!r}'\
                        ' and therefore cannot be used during configuration'
                  raise InterpreterException(msg.format(progname, cmd.description()))
              if not cmd.found():
                  raise InterpreterException('command {!r} not found or not executable'.format(cmd.get_name()))
          elif isinstance(cmd, CompilerHolder):
              exelist = cmd.compiler.get_exelist()
              cmd = exelist[0]
              prog = ExternalProgram(cmd, silent=True)
              if not prog.found():
                  raise InterpreterException('Program {!r} not found '
                                             'or not executable'.format(cmd))
              cmd = prog
              expanded_args = exelist[1:]
          else:
              if isinstance(cmd, mesonlib.File):
                  cmd = cmd.absolute_path(srcdir, builddir)
              elif not isinstance(cmd, str):
                  raise InterpreterException('First argument ' + m.format(cmd))
              # Prefer scripts in the current source directory
              search_dir = os.path.join(srcdir, self.subdir)
              prog = ExternalProgram(cmd, silent=True, search_dir=search_dir)
              if not prog.found():
                  raise InterpreterException('Program or command {!r} not found '
                                             'or not executable'.format(cmd))
              cmd = prog
          for a in listify(cargs):
              if isinstance(a, str):
                  expanded_args.append(a)
              elif isinstance(a, mesonlib.File):
                  expanded_args.append(a.absolute_path(srcdir, builddir))
              elif isinstance(a, ExternalProgramHolder):
                  expanded_args.append(a.held_object.get_path())
              else:
                  raise InterpreterException('Arguments ' + m.format(a))
          # If any file that was used as an argument to the command
          # changes, we must re-run the configuration step.
          self.add_build_def_file(cmd.get_path())
          for a in expanded_args:
              if not os.path.isabs(a):
                  a = os.path.join(builddir if in_builddir else srcdir, self.subdir, a)
              self.add_build_def_file(a)
          return RunProcess(cmd, expanded_args, env, srcdir, builddir, self.subdir,
                            self.environment.get_build_command() + ['introspect'],
                            in_builddir=in_builddir, check=check, capture=capture)
  
      @stringArgs
      def func_gettext(self, nodes, args, kwargs):
          raise InterpreterException('Gettext() function has been moved to module i18n. Import it and use i18n.gettext() instead')
  
      def func_option(self, nodes, args, kwargs):
          raise InterpreterException('Tried to call option() in build description file. All options must be in the option file.')
  
      @FeatureNewKwargs('subproject', '0.38.0', ['default_options'])
      @permittedKwargs(permitted_kwargs['subproject'])
      @stringArgs
      def func_subproject(self, nodes, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Subproject takes exactly one argument')
          subp_name = args[0]
          return self.do_subproject(subp_name, 'meson', kwargs)
  
      def disabled_subproject(self, subp_name, disabled_feature=None, exception=None):
          sub = SubprojectHolder(None, os.path.join(self.subproject_dir, subp_name),
                                 disabled_feature=disabled_feature, exception=exception)
          self.subprojects[subp_name] = sub
          return sub
  
      def get_subproject(self, subp_name):
          sub = self.subprojects.get(subp_name)
          if sub and sub.found():
              return sub
          return None
  
      def do_subproject(self, subp_name: str, method: str, kwargs):
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject)
          if disabled:
              mlog.log('Subproject', mlog.bold(subp_name), ':', 'skipped: feature', mlog.bold(feature), 'disabled')
              return self.disabled_subproject(subp_name, disabled_feature=feature)
  
          default_options = mesonlib.stringlistify(kwargs.get('default_options', []))
          default_options = coredata.create_options_dict(default_options, subp_name)
  
          if subp_name == '':
              raise InterpreterException('Subproject name must not be empty.')
          if subp_name[0] == '.':
              raise InterpreterException('Subproject name must not start with a period.')
          if '..' in subp_name:
              raise InterpreterException('Subproject name must not contain a ".." path segment.')
          if os.path.isabs(subp_name):
              raise InterpreterException('Subproject name must not be an absolute path.')
          if has_path_sep(subp_name):
              mlog.warning('Subproject name has a path separator. This may cause unexpected behaviour.',
                           location=self.current_node)
          if subp_name in self.subproject_stack:
              fullstack = self.subproject_stack + [subp_name]
              incpath = ' => '.join(fullstack)
              raise InvalidCode('Recursive include of subprojects: %s.' % incpath)
          if subp_name in self.subprojects:
              subproject = self.subprojects[subp_name]
              if required and not subproject.found():
                  raise InterpreterException('Subproject "%s" required but not found.' % (subproject.subdir))
              return subproject
  
          r = self.environment.wrap_resolver
          try:
              subdir = r.resolve(subp_name, method, self.subproject)
          except wrap.WrapException as e:
              if not required:
                  mlog.log(e)
                  mlog.log('Subproject ', mlog.bold(subp_name), 'is buildable:', mlog.red('NO'), '(disabling)')
                  return self.disabled_subproject(subp_name, exception=e)
              raise e
  
          subdir_abs = os.path.join(self.environment.get_source_dir(), subdir)
          os.makedirs(os.path.join(self.build.environment.get_build_dir(), subdir), exist_ok=True)
          self.global_args_frozen = True
  
          mlog.log()
          with mlog.nested():
              mlog.log('Executing subproject', mlog.bold(subp_name), 'method', mlog.bold(method), '\n')
          try:
              if method == 'meson':
                  return self._do_subproject_meson(subp_name, subdir, default_options, kwargs)
              elif method == 'cmake':
                  return self._do_subproject_cmake(subp_name, subdir, subdir_abs, default_options, kwargs)
              else:
                  raise InterpreterException('The method {} is invalid for the subproject {}'.format(method, subp_name))
          # Invalid code is always an error
          except InvalidCode:
              raise
          except Exception as e:
              if not required:
                  with mlog.nested():
                      # Suppress the 'ERROR:' prefix because this exception is not
                      # fatal and VS CI treat any logs with "ERROR:" as fatal.
                      mlog.exception(e, prefix=mlog.yellow('Exception:'))
                  mlog.log('\nSubproject', mlog.bold(subdir), 'is buildable:', mlog.red('NO'), '(disabling)')
                  return self.disabled_subproject(subp_name, exception=e)
              raise e
  
      def _do_subproject_meson(self, subp_name: str, subdir: str, default_options, kwargs,
                               ast: T.Optional[mparser.CodeBlockNode] = None,
                               build_def_files: T.Optional[T.List[str]] = None,
                               is_translated: bool = False) -> SubprojectHolder:
          with mlog.nested():
              new_build = self.build.copy()
              subi = Interpreter(new_build, self.backend, subp_name, subdir, self.subproject_dir,
                                 self.modules, default_options, ast=ast, is_translated=is_translated)
              subi.subprojects = self.subprojects
  
              subi.subproject_stack = self.subproject_stack + [subp_name]
              current_active = self.active_projectname
              current_warnings_counter = mlog.log_warnings_counter
              mlog.log_warnings_counter = 0
              subi.run()
              subi_warnings = mlog.log_warnings_counter
              mlog.log_warnings_counter = current_warnings_counter
  
              mlog.log('Subproject', mlog.bold(subp_name), 'finished.')
  
          mlog.log()
  
          if 'version' in kwargs:
              pv = subi.project_version
              wanted = kwargs['version']
              if pv == 'undefined' or not mesonlib.version_compare_many(pv, wanted)[0]:
                  raise InterpreterException('Subproject %s version is %s but %s required.' % (subp_name, pv, wanted))
          self.active_projectname = current_active
          self.subprojects.update(subi.subprojects)
          self.subprojects[subp_name] = SubprojectHolder(subi, subdir, warnings=subi_warnings)
          # Duplicates are possible when subproject uses files from project root
          if build_def_files:
              self.build_def_files = list(set(self.build_def_files + build_def_files))
          # We always need the subi.build_def_files, to propgate sub-sub-projects
          self.build_def_files = list(set(self.build_def_files + subi.build_def_files))
          self.build.merge(subi.build)
          self.build.subprojects[subp_name] = subi.project_version
          self.summary.update(subi.summary)
          return self.subprojects[subp_name]
  
      def _do_subproject_cmake(self, subp_name, subdir, subdir_abs, default_options, kwargs):
          with mlog.nested():
              new_build = self.build.copy()
              prefix = self.coredata.options[OptionKey('prefix')].value
  
              from .modules.cmake import CMakeSubprojectOptions
              options = kwargs.get('options', CMakeSubprojectOptions())
              if not isinstance(options, CMakeSubprojectOptions):
                  raise InterpreterException('"options" kwarg must be CMakeSubprojectOptions'
                                             ' object (created by cmake.subproject_options())')
  
              cmake_options = mesonlib.stringlistify(kwargs.get('cmake_options', []))
              cmake_options += options.cmake_options
              cm_int = CMakeInterpreter(new_build, Path(subdir), Path(subdir_abs), Path(prefix), new_build.environment, self.backend)
              cm_int.initialise(cmake_options)
              cm_int.analyse()
  
              # Generate a meson ast and execute it with the normal do_subproject_meson
              ast = cm_int.pretend_to_be_meson(options.target_options)
  
              mlog.log()
              with mlog.nested():
                  mlog.log('Processing generated meson AST')
  
                  # Debug print the generated meson file
                  from .ast import AstIndentationGenerator, AstPrinter
                  printer = AstPrinter()
                  ast.accept(AstIndentationGenerator())
                  ast.accept(printer)
                  printer.post_process()
                  meson_filename = os.path.join(self.build.environment.get_build_dir(), subdir, 'meson.build')
                  with open(meson_filename, "w") as f:
                      f.write(printer.result)
  
                  mlog.log('Build file:', meson_filename)
                  mlog.cmd_ci_include(meson_filename)
                  mlog.log()
  
              result = self._do_subproject_meson(subp_name, subdir, default_options, kwargs, ast, cm_int.bs_files, is_translated=True)
              result.cm_interpreter = cm_int
  
          mlog.log()
          return result
  
      def get_option_internal(self, optname: str):
          key = OptionKey.from_string(optname).evolve(subproject=self.subproject)
  
          if not key.is_project():
              for opts in [self.coredata.options, compilers.base_options]:
                  v = opts.get(key)
                  if v is None or v.yielding:
                      v = opts.get(key.as_root())
                  if v is not None:
                      return v
  
          try:
              opt = self.coredata.options[key]
              if opt.yielding and key.subproject and key.as_root() in self.coredata.options:
                  popt = self.coredata.options[key.as_root()]
                  if type(opt) is type(popt):
                      opt = popt
                  else:
                      # Get class name, then option type as a string
                      opt_type = opt.__class__.__name__[4:][:-6].lower()
                      popt_type = popt.__class__.__name__[4:][:-6].lower()
                      # This is not a hard error to avoid dependency hell, the workaround
                      # when this happens is to simply set the subproject's option directly.
                      mlog.warning('Option {0!r} of type {1!r} in subproject {2!r} cannot yield '
                                   'to parent option of type {3!r}, ignoring parent value. '
                                   'Use -D{2}:{0}=value to set the value for this option manually'
                                   '.'.format(optname, opt_type, self.subproject, popt_type),
                                   location=self.current_node)
              return opt
          except KeyError:
              pass
  
          raise InterpreterException('Tried to access unknown option "%s".' % optname)
  
      @stringArgs
      @noKwargs
      def func_get_option(self, nodes, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Argument required for get_option.')
          optname = args[0]
          if ':' in optname:
              raise InterpreterException('Having a colon in option name is forbidden, '
                                         'projects are not allowed to directly access '
                                         'options of other subprojects.')
          opt = self.get_option_internal(optname)
          if isinstance(opt, coredata.UserFeatureOption):
              return FeatureOptionHolder(self.environment, optname, opt)
          elif isinstance(opt, coredata.UserOption):
              return opt.value
          return opt
  
      @noKwargs
      def func_configuration_data(self, node, args, kwargs):
          if len(args) > 1:
              raise InterpreterException('configuration_data takes only one optional positional arguments')
          elif len(args) == 1:
              FeatureNew.single_use('configuration_data dictionary', '0.49.0', self.subproject)
              initial_values = args[0]
              if not isinstance(initial_values, dict):
                  raise InterpreterException('configuration_data first argument must be a dictionary')
          else:
              initial_values = {}
          return ConfigurationDataHolder(self.subproject, initial_values)
  
      def set_backend(self):
          # The backend is already set when parsing subprojects
          if self.backend is not None:
              return
          backend = self.coredata.get_option(OptionKey('backend'))
          from .backend import backends
          self.backend = backends.get_backend_from_name(backend, self.build, self)
  
          if self.backend is None:
              raise InterpreterException('Unknown backend "%s".' % backend)
          if backend != self.backend.name:
              if self.backend.name.startswith('vs'):
                  mlog.log('Auto detected Visual Studio backend:', mlog.bold(self.backend.name))
              self.coredata.set_option(OptionKey('backend'), self.backend.name)
  
          # Only init backend options on first invocation otherwise it would
          # override values previously set from command line.
          if self.environment.first_invocation:
              self.coredata.init_backend_options(backend)
  
          options = {k: v for k, v in self.environment.options.items() if k.is_backend()}
          self.coredata.set_options(options)
  
      @stringArgs
      @permittedKwargs(permitted_kwargs['project'])
      def func_project(self, node, args, kwargs):
          if len(args) < 1:
              raise InvalidArguments('Not enough arguments to project(). Needs at least the project name.')
          proj_name, *proj_langs = args
          if ':' in proj_name:
              raise InvalidArguments("Project name {!r} must not contain ':'".format(proj_name))
  
          # This needs to be evaluated as early as possible, as meson uses this
          # for things like deprecation testing.
          if 'meson_version' in kwargs:
              cv = coredata.version
              pv = kwargs['meson_version']
              if not mesonlib.version_compare(cv, pv):
                  raise InterpreterException('Meson version is %s but project requires %s' % (cv, pv))
              mesonlib.project_meson_versions[self.subproject] = kwargs['meson_version']
  
          if os.path.exists(self.option_file):
              oi = optinterpreter.OptionInterpreter(self.subproject)
              oi.process(self.option_file)
              self.coredata.update_project_options(oi.options)
              self.add_build_def_file(self.option_file)
  
          # Do not set default_options on reconfigure otherwise it would override
          # values previously set from command line. That means that changing
          # default_options in a project will trigger a reconfigure but won't
          # have any effect.
          self.project_default_options = mesonlib.stringlistify(kwargs.get('default_options', []))
          self.project_default_options = coredata.create_options_dict(self.project_default_options, self.subproject)
  
          # If this is the first invocation we alway sneed to initialize
          # builtins, if this is a subproject that is new in a re-invocation we
          # need to initialize builtins for that
          if self.environment.first_invocation or (self.subproject != '' and self.subproject not in self.subprojects):
              default_options = self.project_default_options.copy()
              default_options.update(self.default_project_options)
              self.coredata.init_builtins(self.subproject)
          else:
              default_options = {}
          self.coredata.set_default_options(default_options, self.subproject, self.environment)
  
          if not self.is_subproject():
              self.build.project_name = proj_name
          self.active_projectname = proj_name
          version = kwargs.get('version', 'undefined')
          if isinstance(version, list):
              if len(version) != 1:
                  raise InvalidCode('Version argument is an array with more than one entry.')
              version = version[0]
          if isinstance(version, mesonlib.File):
              FeatureNew.single_use('version from file', '0.57.0', self.subproject)
              self.add_build_def_file(version)
              ifname = version.absolute_path(self.environment.source_dir,
                                             self.environment.build_dir)
              try:
                  ver_data = Path(ifname).read_text(encoding='utf-8').split('\n')
              except FileNotFoundError:
                  raise InterpreterException('Version file not found.')
              if len(ver_data) == 2 and ver_data[1] == '':
                  ver_data = ver_data[0:1]
              if len(ver_data) != 1:
                  raise InterpreterException('Version file must contain exactly one line of text.')
              self.project_version = ver_data[0]
          elif isinstance(version, str):
              self.project_version = version
          else:
              raise InvalidCode('The version keyword argument must be a string or a file.')
          if self.build.project_version is None:
              self.build.project_version = self.project_version
          proj_license = mesonlib.stringlistify(kwargs.get('license', 'unknown'))
          self.build.dep_manifest[proj_name] = {'version': self.project_version,
                                                'license': proj_license}
          if self.subproject in self.build.projects:
              raise InvalidCode('Second call to project().')
  
          # spdirname is the subproject_dir for this project, relative to self.subdir.
          # self.subproject_dir is the subproject_dir for the main project, relative to top source dir.
          spdirname = kwargs.get('subproject_dir')
          if spdirname:
              if not isinstance(spdirname, str):
                  raise InterpreterException('Subproject_dir must be a string')
              if os.path.isabs(spdirname):
                  raise InterpreterException('Subproject_dir must not be an absolute path.')
              if spdirname.startswith('.'):
                  raise InterpreterException('Subproject_dir must not begin with a period.')
              if '..' in spdirname:
                  raise InterpreterException('Subproject_dir must not contain a ".." segment.')
              if not self.is_subproject():
                  self.subproject_dir = spdirname
          else:
              spdirname = 'subprojects'
          self.build.subproject_dir = self.subproject_dir
  
          # Load wrap files from this (sub)project.
          wrap_mode = self.coredata.get_option(OptionKey('wrap_mode'))
          if not self.is_subproject() or wrap_mode != WrapMode.nopromote:
              subdir = os.path.join(self.subdir, spdirname)
              r = wrap.Resolver(self.environment.get_source_dir(), subdir, wrap_mode)
              if self.is_subproject():
                  self.environment.wrap_resolver.merge_wraps(r)
              else:
                  self.environment.wrap_resolver = r
  
          self.build.projects[self.subproject] = proj_name
          mlog.log('Project name:', mlog.bold(proj_name))
          mlog.log('Project version:', mlog.bold(self.project_version))
  
          self.add_languages(proj_langs, True, MachineChoice.HOST)
          self.add_languages(proj_langs, False, MachineChoice.BUILD)
  
          self.set_backend()
          if not self.is_subproject():
              self.check_stdlibs()
  
      @FeatureNewKwargs('add_languages', '0.54.0', ['native'])
      @permittedKwargs(permitted_kwargs['add_languages'])
      @stringArgs
      def func_add_languages(self, node, args, kwargs):
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject)
          if disabled:
              for lang in sorted(args, key=compilers.sort_clink):
                  mlog.log('Compiler for language', mlog.bold(lang), 'skipped: feature', mlog.bold(feature), 'disabled')
              return False
          if 'native' in kwargs:
              return self.add_languages(args, required, self.machine_from_native_kwarg(kwargs))
          else:
              # absent 'native' means 'both' for backwards compatibility
              tv = FeatureNew.get_target_version(self.subproject)
              if FeatureNew.check_version(tv, '0.54.0'):
                  mlog.warning('add_languages is missing native:, assuming languages are wanted for both host and build.',
                               location=self.current_node)
  
              success = self.add_languages(args, False, MachineChoice.BUILD)
              success &= self.add_languages(args, required, MachineChoice.HOST)
              return success
  
      @noArgsFlattening
      @noKwargs
      def func_message(self, node, args, kwargs):
          if len(args) > 1:
              FeatureNew.single_use('message with more than one argument', '0.54.0', self.subproject)
          args_str = [stringifyUserArguments(i) for i in args]
          self.message_impl(args_str)
  
      def message_impl(self, args):
          mlog.log(mlog.bold('Message:'), *args)
  
      @noArgsFlattening
      @FeatureNewKwargs('summary', '0.54.0', ['list_sep'])
      @permittedKwargs({'section', 'bool_yn', 'list_sep'})
      @FeatureNew('summary', '0.53.0')
      def func_summary(self, node, args, kwargs):
          if len(args) == 1:
              if not isinstance(args[0], dict):
                  raise InterpreterException('Summary first argument must be dictionary.')
              values = args[0]
          elif len(args) == 2:
              if not isinstance(args[0], str):
                  raise InterpreterException('Summary first argument must be string.')
              values = {args[0]: args[1]}
          else:
              raise InterpreterException('Summary accepts at most 2 arguments.')
          section = kwargs.get('section', '')
          if not isinstance(section, str):
              raise InterpreterException('Summary\'s section keyword argument must be string.')
          self.summary_impl(section, values, kwargs)
  
      def summary_impl(self, section, values, kwargs):
          if self.subproject not in self.summary:
              self.summary[self.subproject] = Summary(self.active_projectname, self.project_version)
          self.summary[self.subproject].add_section(section, values, kwargs, self.subproject)
  
      def _print_summary(self):
          # Add automatic 'Supbrojects' section in main project.
          all_subprojects = collections.OrderedDict()
          for name, subp in sorted(self.subprojects.items()):
              value = subp.found()
              if subp.disabled_feature:
                  value = [value, 'Feature {!r} disabled'.format(subp.disabled_feature)]
              elif subp.exception:
                  value = [value, str(subp.exception)]
              elif subp.warnings > 0:
                  value = [value, '{} warnings'.format(subp.warnings)]
              all_subprojects[name] = value
          if all_subprojects:
              self.summary_impl('Subprojects', all_subprojects,
                                {'bool_yn': True,
                                 'list_sep': ' ',
                                })
          # Print all summaries, main project last.
          mlog.log('')  # newline
          main_summary = self.summary.pop('', None)
          for _, summary in sorted(self.summary.items()):
              summary.dump()
          if main_summary:
              main_summary.dump()
  
      @noArgsFlattening
      @FeatureNew('warning', '0.44.0')
      @noKwargs
      def func_warning(self, node, args, kwargs):
          if len(args) > 1:
              FeatureNew.single_use('warning with more than one argument', '0.54.0', self.subproject)
          args_str = [stringifyUserArguments(i) for i in args]
          mlog.warning(*args_str, location=node)
  
      @noArgsFlattening
      @noKwargs
      def func_error(self, node, args, kwargs):
          if len(args) > 1:
              FeatureNew.single_use('error with more than one argument', '0.58.0', self.subproject)
          args_str = [stringifyUserArguments(i) for i in args]
          raise InterpreterException('Problem encountered: ' + ' '.join(args_str))
  
      @noKwargs
      @noPosargs
      def func_exception(self, node, args, kwargs):
          raise Exception()
  
      def add_languages(self, args: T.Sequence[str], required: bool, for_machine: MachineChoice) -> bool:
          success = self.add_languages_for(args, required, for_machine)
          if not self.coredata.is_cross_build():
              self.coredata.copy_build_options_from_regular_ones()
          self._redetect_machines()
          return success
  
      def should_skip_sanity_check(self, for_machine: MachineChoice) -> bool:
          should = self.environment.properties.host.get('skip_sanity_check', False)
          if not isinstance(should, bool):
              raise InterpreterException('Option skip_sanity_check must be a boolean.')
          if for_machine != MachineChoice.HOST and not should:
              return False
          if not self.environment.is_cross_build() and not should:
              return False
          return should
  
      def add_languages_for(self, args, required, for_machine: MachineChoice):
          args = [a.lower() for a in args]
          langs = set(self.coredata.compilers[for_machine].keys())
          langs.update(args)
          if 'vala' in langs:
              if 'c' not in langs:
                  raise InterpreterException('Compiling Vala requires C. Add C to your project languages and rerun Meson.')
  
          success = True
          for lang in sorted(args, key=compilers.sort_clink):
              clist = self.coredata.compilers[for_machine]
              machine_name = for_machine.get_lower_case_name()
              if lang in clist:
                  comp = clist[lang]
              else:
                  try:
                      comp = self.environment.detect_compiler_for(lang, for_machine)
                      if comp is None:
                          raise InvalidArguments('Tried to use unknown language "%s".' % lang)
                      if self.should_skip_sanity_check(for_machine):
                          mlog.log_once('Cross compiler sanity tests disabled via the cross file.')
                      else:
                          comp.sanity_check(self.environment.get_scratch_dir(), self.environment)
                  except Exception:
                      if not required:
                          mlog.log('Compiler for language',
                                   mlog.bold(lang), 'for the', machine_name,
                                   'machine not found.')
                          success = False
                          continue
                      else:
                          raise
  
              if for_machine == MachineChoice.HOST or self.environment.is_cross_build():
                  logger_fun = mlog.log
              else:
                  logger_fun = mlog.debug
              logger_fun(comp.get_display_language(), 'compiler for the', machine_name, 'machine:',
                         mlog.bold(' '.join(comp.get_exelist())), comp.get_version_string())
              if comp.linker is not None:
                  logger_fun(comp.get_display_language(), 'linker for the', machine_name, 'machine:',
                             mlog.bold(' '.join(comp.linker.get_exelist())), comp.linker.id, comp.linker.version)
              self.build.ensure_static_linker(comp)
  
          return success
  
      def program_from_file_for(self, for_machine, prognames):
          for p in unholder(prognames):
              if isinstance(p, mesonlib.File):
                  continue # Always points to a local (i.e. self generated) file.
              if not isinstance(p, str):
                  raise InterpreterException('Executable name must be a string')
              prog = ExternalProgram.from_bin_list(self.environment, for_machine, p)
              if prog.found():
                  return ExternalProgramHolder(prog, self.subproject)
          return None
  
      def program_from_system(self, args, search_dirs, extra_info):
          # Search for scripts relative to current subdir.
          # Do not cache found programs because find_program('foobar')
          # might give different results when run from different source dirs.
          source_dir = os.path.join(self.environment.get_source_dir(), self.subdir)
          for exename in args:
              if isinstance(exename, mesonlib.File):
                  if exename.is_built:
                      search_dir = os.path.join(self.environment.get_build_dir(),
                                                exename.subdir)
                  else:
                      search_dir = os.path.join(self.environment.get_source_dir(),
                                                exename.subdir)
                  exename = exename.fname
                  extra_search_dirs = []
              elif isinstance(exename, str):
                  search_dir = source_dir
                  extra_search_dirs = search_dirs
              else:
                  raise InvalidArguments('find_program only accepts strings and '
                                         'files, not {!r}'.format(exename))
              extprog = dependencies.ExternalProgram(exename, search_dir=search_dir,
                                                     extra_search_dirs=extra_search_dirs,
                                                     silent=True)
              progobj = ExternalProgramHolder(extprog, self.subproject)
              if progobj.found():
                  extra_info.append('({})'.format(' '.join(progobj.get_command())))
                  return progobj
  
      def program_from_overrides(self, command_names, extra_info):
          for name in command_names:
              if not isinstance(name, str):
                  continue
              if name in self.build.find_overrides:
                  exe = self.build.find_overrides[name]
                  extra_info.append(mlog.blue('(overridden)'))
                  return ExternalProgramHolder(exe, self.subproject, self.backend)
          return None
  
      def store_name_lookups(self, command_names):
          for name in command_names:
              if isinstance(name, str):
                  self.build.searched_programs.add(name)
  
      def add_find_program_override(self, name, exe):
          if name in self.build.searched_programs:
              raise InterpreterException('Tried to override finding of executable "%s" which has already been found.'
                                         % name)
          if name in self.build.find_overrides:
              raise InterpreterException('Tried to override executable "%s" which has already been overridden.'
                                         % name)
          self.build.find_overrides[name] = exe
  
      def notfound_program(self, args):
          return ExternalProgramHolder(dependencies.NonExistingExternalProgram(' '.join(args)), self.subproject)
  
      # TODO update modules to always pass `for_machine`. It is bad-form to assume
      # the host machine.
      def find_program_impl(self, args, for_machine: MachineChoice = MachineChoice.HOST,
                            required=True, silent=True, wanted='', search_dirs=None,
                            version_func=None):
          args = mesonlib.listify(args)
  
          extra_info = []
          progobj = self.program_lookup(args, for_machine, required, search_dirs, extra_info)
          if progobj is None:
              progobj = self.notfound_program(args)
  
          if not progobj.found():
              mlog.log('Program', mlog.bold(progobj.get_name()), 'found:', mlog.red('NO'))
              if required:
                  m = 'Program {!r} not found'
                  raise InterpreterException(m.format(progobj.get_name()))
              return progobj
  
          if wanted:
              if version_func:
                  version = version_func(progobj)
              else:
                  version = progobj.get_version(self)
              is_found, not_found, found = mesonlib.version_compare_many(version, wanted)
              if not is_found:
                  mlog.log('Program', mlog.bold(progobj.get_name()), 'found:', mlog.red('NO'),
                           'found', mlog.normal_cyan(version), 'but need:',
                           mlog.bold(', '.join(["'{}'".format(e) for e in not_found])), *extra_info)
                  if required:
                      m = 'Invalid version of program, need {!r} {!r} found {!r}.'
                      raise InterpreterException(m.format(progobj.get_name(), not_found, version))
                  return self.notfound_program(args)
              extra_info.insert(0, mlog.normal_cyan(version))
  
          # Only store successful lookups
          self.store_name_lookups(args)
          mlog.log('Program', mlog.bold(progobj.get_name()), 'found:', mlog.green('YES'), *extra_info)
          return progobj
  
      def program_lookup(self, args, for_machine, required, search_dirs, extra_info):
          progobj = self.program_from_overrides(args, extra_info)
          if progobj:
              return progobj
  
          fallback = None
          wrap_mode = self.coredata.get_option(OptionKey('wrap_mode'))
          if wrap_mode != WrapMode.nofallback and self.environment.wrap_resolver:
              fallback = self.environment.wrap_resolver.find_program_provider(args)
          if fallback and wrap_mode == WrapMode.forcefallback:
              return self.find_program_fallback(fallback, args, required, extra_info)
  
          progobj = self.program_from_file_for(for_machine, args)
          if progobj is None:
              progobj = self.program_from_system(args, search_dirs, extra_info)
          if progobj is None and args[0].endswith('python3'):
              prog = dependencies.ExternalProgram('python3', mesonlib.python_command, silent=True)
              progobj = ExternalProgramHolder(prog, self.subproject) if prog.found() else None
          if progobj is None and fallback and required:
              progobj = self.find_program_fallback(fallback, args, required, extra_info)
  
          return progobj
  
      def find_program_fallback(self, fallback, args, required, extra_info):
          mlog.log('Fallback to subproject', mlog.bold(fallback), 'which provides program',
                   mlog.bold(' '.join(args)))
          sp_kwargs = { 'required': required }
          self.do_subproject(fallback, 'meson', sp_kwargs)
          return self.program_from_overrides(args, extra_info)
  
      @FeatureNewKwargs('find_program', '0.53.0', ['dirs'])
      @FeatureNewKwargs('find_program', '0.52.0', ['version'])
      @FeatureNewKwargs('find_program', '0.49.0', ['disabler'])
      @disablerIfNotFound
      @permittedKwargs(permitted_kwargs['find_program'])
      def func_find_program(self, node, args, kwargs):
          if not args:
              raise InterpreterException('No program name specified.')
  
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject)
          if disabled:
              mlog.log('Program', mlog.bold(' '.join(args)), 'skipped: feature', mlog.bold(feature), 'disabled')
              return self.notfound_program(args)
  
          search_dirs = extract_search_dirs(kwargs)
          wanted = mesonlib.stringlistify(kwargs.get('version', []))
          for_machine = self.machine_from_native_kwarg(kwargs)
          return self.find_program_impl(args, for_machine, required=required,
                                        silent=False, wanted=wanted,
                                        search_dirs=search_dirs)
  
      def func_find_library(self, node, args, kwargs):
          raise InvalidCode('find_library() is removed, use meson.get_compiler(\'name\').find_library() instead.\n'
                            'Look here for documentation: http://mesonbuild.com/Reference-manual.html#compiler-object\n'
                            'Look here for example: http://mesonbuild.com/howtox.html#add-math-library-lm-portably\n'
                            )
  
      def _find_cached_dep(self, name, display_name, kwargs):
          # Check if we want this as a build-time / build machine or runt-time /
          # host machine dep.
          for_machine = self.machine_from_native_kwarg(kwargs)
          identifier = dependencies.get_dep_identifier(name, kwargs)
          wanted_vers = mesonlib.stringlistify(kwargs.get('version', []))
  
          override = self.build.dependency_overrides[for_machine].get(identifier)
          if override:
              info = [mlog.blue('(overridden)' if override.explicit else '(cached)')]
              cached_dep = override.dep
              # We don't implicitly override not-found dependencies, but user could
              # have explicitly called meson.override_dependency() with a not-found
              # dep.
              if not cached_dep.found():
                  mlog.log('Dependency', mlog.bold(display_name),
                           'found:', mlog.red('NO'), *info)
                  return identifier, cached_dep
              found_vers = cached_dep.get_version()
              if not self.check_version(wanted_vers, found_vers):
                  mlog.log('Dependency', mlog.bold(name),
                           'found:', mlog.red('NO'),
                           'found', mlog.normal_cyan(found_vers), 'but need:',
                           mlog.bold(', '.join(["'{}'".format(e) for e in wanted_vers])),
                           *info)
                  return identifier, NotFoundDependency(self.environment)
          else:
              info = [mlog.blue('(cached)')]
              cached_dep = self.coredata.deps[for_machine].get(identifier)
              if cached_dep:
                  found_vers = cached_dep.get_version()
                  if not self.check_version(wanted_vers, found_vers):
                      return identifier, None
  
          if cached_dep:
              if found_vers:
                  info = [mlog.normal_cyan(found_vers), *info]
              mlog.log('Dependency', mlog.bold(display_name),
                       'found:', mlog.green('YES'), *info)
              return identifier, cached_dep
  
          return identifier, None
  
      @staticmethod
      def check_version(wanted, found):
          if not wanted:
              return True
          if found == 'undefined' or not mesonlib.version_compare_many(found, wanted)[0]:
              return False
          return True
  
      def notfound_dependency(self):
          return DependencyHolder(NotFoundDependency(self.environment), self.subproject)
  
      def verify_fallback_consistency(self, subp_name, varname, cached_dep):
          subi = self.get_subproject(subp_name)
          if not cached_dep or not varname or not subi or not cached_dep.found():
              return
          dep = subi.get_variable_method([varname], {})
          if dep.held_object != cached_dep:
              m = 'Inconsistency: Subproject has overridden the dependency with another variable than {!r}'
              raise DependencyException(m.format(varname))
  
      def get_subproject_dep(self, name, display_name, subp_name, varname, kwargs):
          required = kwargs.get('required', True)
          wanted = mesonlib.stringlistify(kwargs.get('version', []))
          dep = self.notfound_dependency()
  
          # Verify the subproject is found
          subproject = self.subprojects.get(subp_name)
          if not subproject or not subproject.found():
              mlog.log('Dependency', mlog.bold(display_name), 'from subproject',
                       mlog.bold(subproject.subdir), 'found:', mlog.red('NO'),
                       mlog.blue('(subproject failed to configure)'))
              if required:
                  m = 'Subproject {} failed to configure for dependency {}'
                  raise DependencyException(m.format(subproject.subdir, display_name))
              return dep
  
          extra_info = []
          try:
              # Check if the subproject overridden the dependency
              _, cached_dep = self._find_cached_dep(name, display_name, kwargs)
              if cached_dep:
                  if varname:
                      self.verify_fallback_consistency(subp_name, varname, cached_dep)
                  if required and not cached_dep.found():
                      m = 'Dependency {!r} is not satisfied'
                      raise DependencyException(m.format(display_name))
                  return DependencyHolder(cached_dep, self.subproject)
              elif varname is None:
                  mlog.log('Dependency', mlog.bold(display_name), 'from subproject',
                           mlog.bold(subproject.subdir), 'found:', mlog.red('NO'))
                  if required:
                      m = 'Subproject {} did not override dependency {}'
                      raise DependencyException(m.format(subproject.subdir, display_name))
                  return self.notfound_dependency()
              else:
                  # The subproject did not override the dependency, but we know the
                  # variable name to take.
                  dep = subproject.get_variable_method([varname], {})
          except InvalidArguments:
              # This is raised by get_variable_method() if varname does no exist
              # in the subproject. Just add the reason in the not-found message
              # that will be printed later.
              extra_info.append(mlog.blue('(Variable {!r} not found)'.format(varname)))
  
          if not isinstance(dep, DependencyHolder):
              raise InvalidCode('Fetched variable {!r} in the subproject {!r} is '
                                'not a dependency object.'.format(varname, subp_name))
  
          if not dep.found():
              mlog.log('Dependency', mlog.bold(display_name), 'from subproject',
                       mlog.bold(subproject.subdir), 'found:', mlog.red('NO'), *extra_info)
              if required:
                  raise DependencyException('Could not find dependency {} in subproject {}'
                                            ''.format(varname, subp_name))
              return dep
  
          found = dep.held_object.get_version()
          if not self.check_version(wanted, found):
              mlog.log('Dependency', mlog.bold(display_name), 'from subproject',
                       mlog.bold(subproject.subdir), 'found:', mlog.red('NO'),
                       'found', mlog.normal_cyan(found), 'but need:',
                       mlog.bold(', '.join(["'{}'".format(e) for e in wanted])))
              if required:
                  raise DependencyException('Version {} of subproject dependency {} already '
                                            'cached, requested incompatible version {} for '
                                            'dep {}'.format(found, subp_name, wanted, display_name))
              return self.notfound_dependency()
  
          found = mlog.normal_cyan(found) if found else None
          mlog.log('Dependency', mlog.bold(display_name), 'from subproject',
                   mlog.bold(subproject.subdir), 'found:', mlog.green('YES'), found)
          return dep
  
      def _handle_featurenew_dependencies(self, name):
          'Do a feature check on dependencies used by this subproject'
          if name == 'mpi':
              FeatureNew.single_use('MPI Dependency', '0.42.0', self.subproject)
          elif name == 'pcap':
              FeatureNew.single_use('Pcap Dependency', '0.42.0', self.subproject)
          elif name == 'vulkan':
              FeatureNew.single_use('Vulkan Dependency', '0.42.0', self.subproject)
          elif name == 'libwmf':
              FeatureNew.single_use('LibWMF Dependency', '0.44.0', self.subproject)
          elif name == 'openmp':
              FeatureNew.single_use('OpenMP Dependency', '0.46.0', self.subproject)
  
      @FeatureNewKwargs('dependency', '0.57.0', ['cmake_package_version'])
      @FeatureNewKwargs('dependency', '0.54.0', ['components'])
      @FeatureNewKwargs('dependency', '0.52.0', ['include_type'])
      @FeatureNewKwargs('dependency', '0.50.0', ['not_found_message', 'cmake_module_path', 'cmake_args'])
      @FeatureNewKwargs('dependency', '0.49.0', ['disabler'])
      @FeatureNewKwargs('dependency', '0.40.0', ['method'])
      @FeatureNewKwargs('dependency', '0.38.0', ['default_options'])
      @disablerIfNotFound
      @permittedKwargs(permitted_kwargs['dependency'])
      def func_dependency(self, node, args, kwargs):
          self.validate_arguments(args, 1, [str])
          name = args[0]
          display_name = name if name else '(anonymous)'
          mods = extract_as_list(kwargs, 'modules')
          if mods:
              display_name += ' (modules: {})'.format(', '.join(str(i) for i in mods))
          not_found_message = kwargs.get('not_found_message', '')
          if not isinstance(not_found_message, str):
              raise InvalidArguments('The not_found_message must be a string.')
          try:
              d = self.dependency_impl(name, display_name, kwargs)
          except Exception:
              if not_found_message:
                  self.message_impl([not_found_message])
              raise
          assert isinstance(d, DependencyHolder)
          if not d.found() and not_found_message:
              self.message_impl([not_found_message])
              self.message_impl([not_found_message])
          # Ensure the correct include type
          if 'include_type' in kwargs:
              wanted = kwargs['include_type']
              actual = d.include_type_method([], {})
              if wanted != actual:
                  mlog.debug('Current include type of {} is {}. Converting to requested {}'.format(name, actual, wanted))
                  d = d.as_system_method([wanted], {})
          # Override this dependency to have consistent results in subsequent
          # dependency lookups.
          if name and d.found():
              for_machine = self.machine_from_native_kwarg(kwargs)
              identifier = dependencies.get_dep_identifier(name, kwargs)
              if identifier not in self.build.dependency_overrides[for_machine]:
                  self.build.dependency_overrides[for_machine][identifier] = \
                      build.DependencyOverride(d.held_object, node, explicit=False)
          return d
  
      def dependency_impl(self, name, display_name, kwargs, force_fallback=False):
          disabled, required, feature = extract_required_kwarg(kwargs, self.subproject)
          if disabled:
              mlog.log('Dependency', mlog.bold(display_name), 'skipped: feature', mlog.bold(feature), 'disabled')
              return self.notfound_dependency()
  
          fallback = kwargs.get('fallback', None)
          allow_fallback = kwargs.get('allow_fallback', None)
          if allow_fallback is not None:
              FeatureNew.single_use('"allow_fallback" keyword argument for dependency', '0.56.0', self.subproject)
              if fallback is not None:
                  raise InvalidArguments('"fallback" and "allow_fallback" arguments are mutually exclusive')
              if not isinstance(allow_fallback, bool):
                  raise InvalidArguments('"allow_fallback" argument must be boolean')
  
          # If "fallback" is absent, look for an implicit fallback.
          if name and fallback is None and allow_fallback is not False:
              # Add an implicit fallback if we have a wrap file or a directory with the same name,
              # but only if this dependency is required. It is common to first check for a pkg-config,
              # then fallback to use find_library() and only afterward check again the dependency
              # with a fallback. If the fallback has already been configured then we have to use it
              # even if the dependency is not required.
              provider = self.environment.wrap_resolver.find_dep_provider(name)
              if not provider and allow_fallback is True:
                  raise InvalidArguments('Fallback wrap or subproject not found for dependency \'%s\'' % name)
              subp_name = mesonlib.listify(provider)[0]
              if provider and (allow_fallback is True or required or self.get_subproject(subp_name)):
                  fallback = provider
  
          if 'default_options' in kwargs and not fallback:
              mlog.warning('The "default_options" keyword argument does nothing without a fallback subproject.',
                           location=self.current_node)
  
          # writing just "dependency('')" is an error, because it can only fail
          if name == '' and required and not fallback:
              raise InvalidArguments('Dependency is both required and not-found')
  
          if '<' in name or '>' in name or '=' in name:
              raise InvalidArguments('Characters <, > and = are forbidden in dependency names. To specify'
                                     'version\n requirements use the \'version\' keyword argument instead.')
  
          identifier, cached_dep = self._find_cached_dep(name, display_name, kwargs)
          if cached_dep:
              if fallback:
                  subp_name, varname = self.get_subproject_infos(fallback)
                  self.verify_fallback_consistency(subp_name, varname, cached_dep)
              if required and not cached_dep.found():
                  m = 'Dependency {!r} was already checked and was not found'
                  raise DependencyException(m.format(display_name))
              return DependencyHolder(cached_dep, self.subproject)
  
          if fallback:
              # If the dependency has already been configured, possibly by
              # a higher level project, try to use it first.
              subp_name, varname = self.get_subproject_infos(fallback)
              if self.get_subproject(subp_name):
                  return self.get_subproject_dep(name, display_name, subp_name, varname, kwargs)
  
              wrap_mode = self.coredata.get_option(OptionKey('wrap_mode'))
              force_fallback_for = self.coredata.get_option(OptionKey('force_fallback_for'))
              force_fallback = (force_fallback or
                                wrap_mode == WrapMode.forcefallback or
                                name in force_fallback_for or
                                subp_name in force_fallback_for)
  
          if name != '' and (not fallback or not force_fallback):
              self._handle_featurenew_dependencies(name)
              kwargs['required'] = required and not fallback
              dep = dependencies.find_external_dependency(name, self.environment, kwargs)
              kwargs['required'] = required
              # Only store found-deps in the cache
              # Never add fallback deps to self.coredata.deps since we
              # cannot cache them. They must always be evaluated else
              # we won't actually read all the build files.
              if dep.found():
                  for_machine = self.machine_from_native_kwarg(kwargs)
                  self.coredata.deps[for_machine].put(identifier, dep)
                  return DependencyHolder(dep, self.subproject)
  
          if fallback:
              return self.dependency_fallback(name, display_name, fallback, kwargs)
  
          return self.notfound_dependency()
  
      @FeatureNew('disabler', '0.44.0')
      @noKwargs
      @noPosargs
      def func_disabler(self, node, args, kwargs):
          return Disabler()
  
      def get_subproject_infos(self, fbinfo):
          fbinfo = mesonlib.stringlistify(fbinfo)
          if len(fbinfo) == 1:
              FeatureNew.single_use('Fallback without variable name', '0.53.0', self.subproject)
              return fbinfo[0], None
          elif len(fbinfo) != 2:
              raise InterpreterException('Fallback info must have one or two items.')
          return fbinfo
  
      def dependency_fallback(self, name, display_name, fallback, kwargs):
          subp_name, varname = self.get_subproject_infos(fallback)
          required = kwargs.get('required', True)
  
          # Explicitly listed fallback preferences for specific subprojects
          # take precedence over wrap-mode
          force_fallback_for = self.coredata.get_option(OptionKey('force_fallback_for'))
          if name in force_fallback_for or subp_name in force_fallback_for:
              mlog.log('Looking for a fallback subproject for the dependency',
                       mlog.bold(display_name), 'because:\nUse of fallback was forced for that specific subproject')
          elif self.coredata.get_option(OptionKey('wrap_mode')) == WrapMode.nofallback:
              mlog.log('Not looking for a fallback subproject for the dependency',
                       mlog.bold(display_name), 'because:\nUse of fallback '
                       'dependencies is disabled.')
              if required:
                  m = 'Dependency {!r} not found and fallback is disabled'
                  raise DependencyException(m.format(display_name))
              return self.notfound_dependency()
          elif self.coredata.get_option(OptionKey('wrap_mode')) == WrapMode.forcefallback:
              mlog.log('Looking for a fallback subproject for the dependency',
                       mlog.bold(display_name), 'because:\nUse of fallback dependencies is forced.')
          else:
              mlog.log('Looking for a fallback subproject for the dependency',
                       mlog.bold(display_name))
          sp_kwargs = {
              'default_options': kwargs.get('default_options', []),
              'required': required,
          }
          self.do_subproject(subp_name, 'meson', sp_kwargs)
          return self.get_subproject_dep(name, display_name, subp_name, varname, kwargs)
  
      @FeatureNewKwargs('executable', '0.42.0', ['implib'])
      @FeatureNewKwargs('executable', '0.56.0', ['win_subsystem'])
      @FeatureDeprecatedKwargs('executable', '0.56.0', ['gui_app'], extra_message="Use 'win_subsystem' instead.")
      @permittedKwargs(permitted_kwargs['executable'])
      def func_executable(self, node, args, kwargs):
          return self.build_target(node, args, kwargs, ExecutableHolder)
  
      @permittedKwargs(permitted_kwargs['static_library'])
      def func_static_lib(self, node, args, kwargs):
          return self.build_target(node, args, kwargs, StaticLibraryHolder)
  
      @permittedKwargs(permitted_kwargs['shared_library'])
      def func_shared_lib(self, node, args, kwargs):
          holder = self.build_target(node, args, kwargs, SharedLibraryHolder)
          holder.held_object.shared_library_only = True
          return holder
  
      @permittedKwargs(permitted_kwargs['both_libraries'])
      def func_both_lib(self, node, args, kwargs):
          return self.build_both_libraries(node, args, kwargs)
  
      @FeatureNew('shared_module', '0.37.0')
      @permittedKwargs(permitted_kwargs['shared_module'])
      def func_shared_module(self, node, args, kwargs):
          return self.build_target(node, args, kwargs, SharedModuleHolder)
  
      @permittedKwargs(permitted_kwargs['library'])
      def func_library(self, node, args, kwargs):
          return self.build_library(node, args, kwargs)
  
      @permittedKwargs(permitted_kwargs['jar'])
      def func_jar(self, node, args, kwargs):
          return self.build_target(node, args, kwargs, JarHolder)
  
      @FeatureNewKwargs('build_target', '0.40.0', ['link_whole', 'override_options'])
      @permittedKwargs(permitted_kwargs['build_target'])
      def func_build_target(self, node, args, kwargs):
          if 'target_type' not in kwargs:
              raise InterpreterException('Missing target_type keyword argument')
          target_type = kwargs.pop('target_type')
          if target_type == 'executable':
              return self.build_target(node, args, kwargs, ExecutableHolder)
          elif target_type == 'shared_library':
              return self.build_target(node, args, kwargs, SharedLibraryHolder)
          elif target_type == 'shared_module':
              FeatureNew('build_target(target_type: \'shared_module\')',
                         '0.51.0').use(self.subproject)
              return self.build_target(node, args, kwargs, SharedModuleHolder)
          elif target_type == 'static_library':
              return self.build_target(node, args, kwargs, StaticLibraryHolder)
          elif target_type == 'both_libraries':
              return self.build_both_libraries(node, args, kwargs)
          elif target_type == 'library':
              return self.build_library(node, args, kwargs)
          elif target_type == 'jar':
              return self.build_target(node, args, kwargs, JarHolder)
          else:
              raise InterpreterException('Unknown target_type.')
  
      @permittedKwargs(permitted_kwargs['vcs_tag'])
      @FeatureDeprecatedKwargs('custom_target', '0.47.0', ['build_always'],
                               'combine build_by_default and build_always_stale instead.')
      @noPosargs
      def func_vcs_tag(self, node, args, kwargs):
          if 'input' not in kwargs or 'output' not in kwargs:
              raise InterpreterException('Keyword arguments input and output must exist')
          if 'fallback' not in kwargs:
              FeatureNew.single_use('Optional fallback in vcs_tag', '0.41.0', self.subproject)
          fallback = kwargs.pop('fallback', self.project_version)
          if not isinstance(fallback, str):
              raise InterpreterException('Keyword argument fallback must be a string.')
          replace_string = kwargs.pop('replace_string', '@VCS_TAG@')
          regex_selector = '(.*)' # default regex selector for custom command: use complete output
          vcs_cmd = kwargs.get('command', None)
          if vcs_cmd and not isinstance(vcs_cmd, list):
              vcs_cmd = [vcs_cmd]
          source_dir = os.path.normpath(os.path.join(self.environment.get_source_dir(), self.subdir))
          if vcs_cmd:
              # Is the command an executable in path or maybe a script in the source tree?
              vcs_cmd[0] = shutil.which(vcs_cmd[0]) or os.path.join(source_dir, vcs_cmd[0])
          else:
              vcs = mesonlib.detect_vcs(source_dir)
              if vcs:
                  mlog.log('Found %s repository at %s' % (vcs['name'], vcs['wc_dir']))
                  vcs_cmd = vcs['get_rev'].split()
                  regex_selector = vcs['rev_regex']
              else:
                  vcs_cmd = [' '] # executing this cmd will fail in vcstagger.py and force to use the fallback string
          # vcstagger.py parameters: infile, outfile, fallback, source_dir, replace_string, regex_selector, command...
          kwargs['command'] = self.environment.get_build_command() + \
              ['--internal',
               'vcstagger',
               '@INPUT0@',
               '@OUTPUT0@',
               fallback,
               source_dir,
               replace_string,
               regex_selector] + vcs_cmd
          kwargs.setdefault('build_by_default', True)
          kwargs.setdefault('build_always_stale', True)
          return self._func_custom_target_impl(node, [kwargs['output']], kwargs)
  
      @FeatureNew('subdir_done', '0.46.0')
      @noPosargs
      @noKwargs
      def func_subdir_done(self, node, args, kwargs):
          raise SubdirDoneRequest()
  
      @stringArgs
      @FeatureNewKwargs('custom_target', '0.57.0', ['env'])
      @FeatureNewKwargs('custom_target', '0.48.0', ['console'])
      @FeatureNewKwargs('custom_target', '0.47.0', ['install_mode', 'build_always_stale'])
      @FeatureNewKwargs('custom_target', '0.40.0', ['build_by_default'])
      @permittedKwargs(permitted_kwargs['custom_target'])
      def func_custom_target(self, node, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('custom_target: Only one positional argument is allowed, and it must be a string name')
          if 'depfile' in kwargs and ('@BASENAME@' in kwargs['depfile'] or '@PLAINNAME@' in kwargs['depfile']):
              FeatureNew.single_use('substitutions in custom_target depfile', '0.47.0', self.subproject)
          return self._func_custom_target_impl(node, args, kwargs)
  
      def _func_custom_target_impl(self, node, args, kwargs):
          'Implementation-only, without FeatureNew checks, for internal use'
          name = args[0]
          kwargs['install_mode'] = self._get_kwarg_install_mode(kwargs)
          if 'input' in kwargs:
              try:
                  kwargs['input'] = self.source_strings_to_files(extract_as_list(kwargs, 'input'))
              except mesonlib.MesonException:
                  mlog.warning('''Custom target input \'%s\' can\'t be converted to File object(s).
  This will become a hard error in the future.''' % kwargs['input'], location=self.current_node)
          kwargs['env'] = self.unpack_env_kwarg(kwargs)
          tg = CustomTargetHolder(build.CustomTarget(name, self.subdir, self.subproject, kwargs, backend=self.backend), self)
          self.add_target(name, tg.held_object)
          return tg
  
      @FeatureNewKwargs('run_target', '0.57.0', ['env'])
      @permittedKwargs(permitted_kwargs['run_target'])
      def func_run_target(self, node, args, kwargs):
          if len(args) > 1:
              raise InvalidCode('Run_target takes only one positional argument: the target name.')
          elif len(args) == 1:
              if 'command' not in kwargs:
                  raise InterpreterException('Missing "command" keyword argument')
              all_args = extract_as_list(kwargs, 'command')
              deps = unholder(extract_as_list(kwargs, 'depends'))
          else:
              raise InterpreterException('Run_target needs at least one positional argument.')
  
          cleaned_args = []
          for i in unholder(listify(all_args)):
              if not isinstance(i, (str, build.BuildTarget, build.CustomTarget, dependencies.ExternalProgram, mesonlib.File)):
                  mlog.debug('Wrong type:', str(i))
                  raise InterpreterException('Invalid argument to run_target.')
              if isinstance(i, dependencies.ExternalProgram) and not i.found():
                  raise InterpreterException('Tried to use non-existing executable {!r}'.format(i.name))
              cleaned_args.append(i)
          name = args[0]
          if not isinstance(name, str):
              raise InterpreterException('First argument must be a string.')
          cleaned_deps = []
          for d in deps:
              if not isinstance(d, (build.BuildTarget, build.CustomTarget)):
                  raise InterpreterException('Depends items must be build targets.')
              cleaned_deps.append(d)
          env = self.unpack_env_kwarg(kwargs)
          tg = RunTargetHolder(build.RunTarget(name, cleaned_args, cleaned_deps, self.subdir, self.subproject, env), self)
          self.add_target(name, tg.held_object)
          full_name = (self.subproject, name)
          assert(full_name not in self.build.run_target_names)
          self.build.run_target_names.add(full_name)
          return tg
  
      @FeatureNew('alias_target', '0.52.0')
      @noKwargs
      def func_alias_target(self, node, args, kwargs):
          if len(args) < 2:
              raise InvalidCode('alias_target takes at least 2 arguments.')
          name = args[0]
          if not isinstance(name, str):
              raise InterpreterException('First argument must be a string.')
          deps = unholder(listify(args[1:]))
          for d in deps:
              if not isinstance(d, (build.BuildTarget, build.CustomTarget)):
                  raise InterpreterException('Depends items must be build targets.')
          tg = RunTargetHolder(build.AliasTarget(name, deps, self.subdir, self.subproject), self)
          self.add_target(name, tg.held_object)
          return tg
  
      @permittedKwargs(permitted_kwargs['generator'])
      def func_generator(self, node, args, kwargs):
          gen = GeneratorHolder(self, args, kwargs)
          self.generators.append(gen)
          return gen
  
      @FeatureNewKwargs('benchmark', '0.46.0', ['depends'])
      @FeatureNewKwargs('benchmark', '0.52.0', ['priority'])
      @permittedKwargs(permitted_kwargs['benchmark'])
      def func_benchmark(self, node, args, kwargs):
          # is_parallel isn't valid here, so make sure it isn't passed
          if 'is_parallel' in kwargs:
              del kwargs['is_parallel']
          self.add_test(node, args, kwargs, False)
  
      @FeatureNewKwargs('test', '0.46.0', ['depends'])
      @FeatureNewKwargs('test', '0.52.0', ['priority'])
      @permittedKwargs(permitted_kwargs['test'])
      def func_test(self, node, args, kwargs):
          if kwargs.get('protocol') == 'gtest':
              FeatureNew.single_use('"gtest" protocol for tests', '0.55.0', self.subproject)
          self.add_test(node, args, kwargs, True)
  
      def unpack_env_kwarg(self, kwargs) -> build.EnvironmentVariables:
          envlist = kwargs.get('env', EnvironmentVariablesHolder())
          if isinstance(envlist, EnvironmentVariablesHolder):
              env = envlist.held_object
          elif isinstance(envlist, dict):
              FeatureNew.single_use('environment dictionary', '0.52.0', self.subproject)
              env = EnvironmentVariablesHolder(envlist)
              env = env.held_object
          else:
              envlist = listify(envlist)
              # Convert from array to environment object
              env = EnvironmentVariablesHolder(envlist)
              env = env.held_object
          return env
  
      def make_test(self, node: mparser.BaseNode, args: T.List, kwargs: T.Dict[str, T.Any]):
          if len(args) != 2:
              raise InterpreterException('test expects 2 arguments, {} given'.format(len(args)))
          name = args[0]
          if not isinstance(name, str):
              raise InterpreterException('First argument of test must be a string.')
          if ':' in name:
              mlog.deprecation('":" is not allowed in test name "{}", it has been replaced with "_"'.format(name),
                               location=node)
              name = name.replace(':', '_')
          exe = args[1]
          if not isinstance(exe, (ExecutableHolder, JarHolder, ExternalProgramHolder)):
              if isinstance(exe, mesonlib.File):
                  exe = self.func_find_program(node, args[1], {})
              else:
                  raise InterpreterException('Second argument must be executable.')
          par = kwargs.get('is_parallel', True)
          if not isinstance(par, bool):
              raise InterpreterException('Keyword argument is_parallel must be a boolean.')
          cmd_args = unholder(extract_as_list(kwargs, 'args'))
          for i in cmd_args:
              if not isinstance(i, (str, mesonlib.File, build.Target)):
                  raise InterpreterException('Command line arguments must be strings, files or targets.')
          env = self.unpack_env_kwarg(kwargs)
          should_fail = kwargs.get('should_fail', False)
          if not isinstance(should_fail, bool):
              raise InterpreterException('Keyword argument should_fail must be a boolean.')
          timeout = kwargs.get('timeout', 30)
          if not isinstance(timeout, int):
              raise InterpreterException('Timeout must be an integer.')
          if timeout <= 0:
              FeatureNew('test() timeout <= 0', '0.57.0').use(self.subproject)
          if 'workdir' in kwargs:
              workdir = kwargs['workdir']
              if not isinstance(workdir, str):
                  raise InterpreterException('Workdir keyword argument must be a string.')
              if not os.path.isabs(workdir):
                  raise InterpreterException('Workdir keyword argument must be an absolute path.')
          else:
              workdir = None
          protocol = kwargs.get('protocol', 'exitcode')
          if protocol not in {'exitcode', 'tap', 'gtest', 'rust'}:
              raise InterpreterException('Protocol must be one of "exitcode", "tap", "gtest", or "rust".')
          suite = []
          prj = self.subproject if self.is_subproject() else self.build.project_name
          for s in mesonlib.stringlistify(kwargs.get('suite', '')):
              if len(s) > 0:
                  s = ':' + s
              suite.append(prj.replace(' ', '_').replace(':', '_') + s)
          depends = unholder(extract_as_list(kwargs, 'depends'))
          for dep in depends:
              if not isinstance(dep, (build.CustomTarget, build.BuildTarget)):
                  raise InterpreterException('Depends items must be build targets.')
          priority = kwargs.get('priority', 0)
          if not isinstance(priority, int):
              raise InterpreterException('Keyword argument priority must be an integer.')
          return Test(name, prj, suite, exe.held_object, depends, par, cmd_args,
                      env, should_fail, timeout, workdir, protocol, priority)
  
      def add_test(self, node: mparser.BaseNode, args: T.List, kwargs: T.Dict[str, T.Any], is_base_test: bool):
          t = self.make_test(node, args, kwargs)
          if is_base_test:
              self.build.tests.append(t)
              mlog.debug('Adding test', mlog.bold(t.name, True))
          else:
              self.build.benchmarks.append(t)
              mlog.debug('Adding benchmark', mlog.bold(t.name, True))
  
      @FeatureNewKwargs('install_headers', '0.47.0', ['install_mode'])
      @permittedKwargs(permitted_kwargs['install_headers'])
      def func_install_headers(self, node, args, kwargs):
          source_files = self.source_strings_to_files(args)
          install_mode = self._get_kwarg_install_mode(kwargs)
  
          install_subdir = kwargs.get('subdir', '')
          if not isinstance(install_subdir, str):
              raise InterpreterException('subdir keyword argument must be a string')
          elif os.path.isabs(install_subdir):
              mlog.deprecation('Subdir keyword must not be an absolute path. This will be a hard error in the next release.')
  
          install_dir = kwargs.get('install_dir', None)
          if install_dir is not None and not isinstance(install_dir, str):
              raise InterpreterException('install_dir keyword argument must be a string if provided')
  
          h = build.Headers(source_files, install_subdir, install_dir, install_mode, self.subproject)
          self.build.headers.append(h)
  
          return HeadersHolder(h)
  
      @FeatureNewKwargs('install_man', '0.47.0', ['install_mode'])
      @FeatureNewKwargs('install_man', '0.58.0', ['locale'])
      @permittedKwargs(permitted_kwargs['install_man'])
      def func_install_man(self, node, args, kwargs):
          sources = self.source_strings_to_files(args)
          for s in sources:
              try:
                  num = int(s.split('.')[-1])
              except (IndexError, ValueError):
                  num = 0
              if num < 1 or num > 8:
                  raise InvalidArguments('Man file must have a file extension of a number between 1 and 8')
          custom_install_mode = self._get_kwarg_install_mode(kwargs)
          custom_install_dir = kwargs.get('install_dir', None)
          locale = kwargs.get('locale')
          if custom_install_dir is not None and not isinstance(custom_install_dir, str):
              raise InterpreterException('install_dir must be a string.')
  
          m = build.Man(sources, custom_install_dir, custom_install_mode, self.subproject, locale)
          self.build.man.append(m)
  
          return ManHolder(m)
  
      @FeatureNewKwargs('subdir', '0.44.0', ['if_found'])
      @permittedKwargs(permitted_kwargs['subdir'])
      def func_subdir(self, node, args, kwargs):
          self.validate_arguments(args, 1, [str])
          mesonlib.check_direntry_issues(args)
          if '..' in args[0]:
              raise InvalidArguments('Subdir contains ..')
          if self.subdir == '' and args[0] == self.subproject_dir:
              raise InvalidArguments('Must not go into subprojects dir with subdir(), use subproject() instead.')
          if self.subdir == '' and args[0].startswith('meson-'):
              raise InvalidArguments('The "meson-" prefix is reserved and cannot be used for top-level subdir().')
          for i in mesonlib.extract_as_list(kwargs, 'if_found'):
              if not hasattr(i, 'found_method'):
                  raise InterpreterException('Object used in if_found does not have a found method.')
              if not i.found_method([], {}):
                  return
          prev_subdir = self.subdir
          subdir = os.path.join(prev_subdir, args[0])
          if os.path.isabs(subdir):
              raise InvalidArguments('Subdir argument must be a relative path.')
          absdir = os.path.join(self.environment.get_source_dir(), subdir)
          symlinkless_dir = os.path.realpath(absdir)
          if symlinkless_dir in self.visited_subdirs:
              raise InvalidArguments('Tried to enter directory "%s", which has already been visited.'
                                     % subdir)
          self.visited_subdirs[symlinkless_dir] = True
          self.subdir = subdir
          os.makedirs(os.path.join(self.environment.build_dir, subdir), exist_ok=True)
          buildfilename = os.path.join(self.subdir, environment.build_filename)
          self.build_def_files.append(buildfilename)
          absname = os.path.join(self.environment.get_source_dir(), buildfilename)
          if not os.path.isfile(absname):
              self.subdir = prev_subdir
              raise InterpreterException("Non-existent build file '{!s}'".format(buildfilename))
          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
          try:
              self.evaluate_codeblock(codeblock)
          except SubdirDoneRequest:
              pass
          self.subdir = prev_subdir
  
      def _get_kwarg_install_mode(self, kwargs: T.Dict[str, T.Any]) -> T.Optional[FileMode]:
          if kwargs.get('install_mode', None) is None:
              return None
          install_mode: T.List[str] = []
          mode = mesonlib.typeslistify(kwargs.get('install_mode', []), (str, int))
          for m in mode:
              # We skip any arguments that are set to `false`
              if m is False:
                  m = None
              install_mode.append(m)
          if len(install_mode) > 3:
              raise InvalidArguments('Keyword argument install_mode takes at '
                                     'most 3 arguments.')
          if len(install_mode) > 0 and install_mode[0] is not None and \
             not isinstance(install_mode[0], str):
              raise InvalidArguments('Keyword argument install_mode requires the '
                                     'permissions arg to be a string or false')
          return FileMode(*install_mode)
  
      @FeatureNewKwargs('install_data', '0.46.0', ['rename'])
      @FeatureNewKwargs('install_data', '0.38.0', ['install_mode'])
      @permittedKwargs(permitted_kwargs['install_data'])
      def func_install_data(self, node, args: T.List, kwargs: T.Dict[str, T.Any]):
          kwsource = mesonlib.stringlistify(kwargs.get('sources', []))
          raw_sources = args + kwsource
          sources: T.List[mesonlib.File] = []
          source_strings: T.List[str] = []
          for s in raw_sources:
              if isinstance(s, mesonlib.File):
                  sources.append(s)
              elif isinstance(s, str):
                  source_strings.append(s)
              else:
                  raise InvalidArguments('Argument must be string or file.')
          sources += self.source_strings_to_files(source_strings)
          install_dir: T.Optional[str] = kwargs.get('install_dir', None)
          if install_dir is not None and not isinstance(install_dir, str):
              raise InvalidArguments('Keyword argument install_dir not a string.')
          install_mode = self._get_kwarg_install_mode(kwargs)
          rename: T.Optional[T.List[str]] = kwargs.get('rename', None)
          if rename is not None:
              rename = mesonlib.stringlistify(rename)
              if len(rename) != len(sources):
                  raise InvalidArguments(
                      '"rename" and "sources" argument lists must be the same length if "rename" is given. '
                      f'Rename has {len(rename)} elements and sources has {len(sources)}.')
  
          data = DataHolder(build.Data(sources, install_dir, install_mode, self.subproject, rename))
          self.build.data.append(data.held_object)
          return data
  
      @FeatureNewKwargs('install_subdir', '0.42.0', ['exclude_files', 'exclude_directories'])
      @FeatureNewKwargs('install_subdir', '0.38.0', ['install_mode'])
      @permittedKwargs(permitted_kwargs['install_subdir'])
      @stringArgs
      def func_install_subdir(self, node, args, kwargs):
          if len(args) != 1:
              raise InvalidArguments('Install_subdir requires exactly one argument.')
          subdir: str = args[0]
          if not isinstance(subdir, str):
              raise InvalidArguments('install_subdir positional argument 1 must be a string.')
          if 'install_dir' not in kwargs:
              raise InvalidArguments('Missing keyword argument install_dir')
          install_dir: str = kwargs['install_dir']
          if not isinstance(install_dir, str):
              raise InvalidArguments('Keyword argument install_dir not a string.')
          if 'strip_directory' in kwargs:
              strip_directory: bool = kwargs['strip_directory']
              if not isinstance(strip_directory, bool):
                  raise InterpreterException('"strip_directory" keyword must be a boolean.')
          else:
              strip_directory = False
          if 'exclude_files' in kwargs:
              exclude: T.List[str] = extract_as_list(kwargs, 'exclude_files')
              for f in exclude:
                  if not isinstance(f, str):
                      raise InvalidArguments('Exclude argument not a string.')
                  elif os.path.isabs(f):
                      raise InvalidArguments('Exclude argument cannot be absolute.')
              exclude_files: T.Set[str] = set(exclude)
          else:
              exclude_files = set()
          if 'exclude_directories' in kwargs:
              exclude: T.List[str] = extract_as_list(kwargs, 'exclude_directories')
              for d in exclude:
                  if not isinstance(d, str):
                      raise InvalidArguments('Exclude argument not a string.')
                  elif os.path.isabs(d):
                      raise InvalidArguments('Exclude argument cannot be absolute.')
              exclude_directories: T.Set[str] = set(exclude)
          else:
              exclude_directories = set()
          exclude = (exclude_files, exclude_directories)
          install_mode = self._get_kwarg_install_mode(kwargs)
          idir = build.InstallDir(self.subdir, subdir, install_dir, install_mode, exclude, strip_directory, self.subproject)
          self.build.install_dirs.append(idir)
          return InstallDirHolder(idir)
  
      @FeatureNewKwargs('configure_file', '0.47.0', ['copy', 'output_format', 'install_mode', 'encoding'])
      @FeatureNewKwargs('configure_file', '0.46.0', ['format'])
      @FeatureNewKwargs('configure_file', '0.41.0', ['capture'])
      @FeatureNewKwargs('configure_file', '0.50.0', ['install'])
      @FeatureNewKwargs('configure_file', '0.52.0', ['depfile'])
      @permittedKwargs(permitted_kwargs['configure_file'])
      @noPosargs
      def func_configure_file(self, node, args, kwargs):
          if 'output' not in kwargs:
              raise InterpreterException('Required keyword argument "output" not defined.')
          actions = set(['configuration', 'command', 'copy']).intersection(kwargs.keys())
          if len(actions) == 0:
              raise InterpreterException('Must specify an action with one of these '
                                         'keyword arguments: \'configuration\', '
                                         '\'command\', or \'copy\'.')
          elif len(actions) == 2:
              raise InterpreterException('Must not specify both {!r} and {!r} '
                                         'keyword arguments since they are '
                                         'mutually exclusive.'.format(*actions))
          elif len(actions) == 3:
              raise InterpreterException('Must specify one of {!r}, {!r}, and '
                                         '{!r} keyword arguments since they are '
                                         'mutually exclusive.'.format(*actions))
          if 'capture' in kwargs:
              if not isinstance(kwargs['capture'], bool):
                  raise InterpreterException('"capture" keyword must be a boolean.')
              if 'command' not in kwargs:
                  raise InterpreterException('"capture" keyword requires "command" keyword.')
  
          if 'format' in kwargs:
              fmt = kwargs['format']
              if not isinstance(fmt, str):
                  raise InterpreterException('"format" keyword must be a string.')
          else:
              fmt = 'meson'
  
          if fmt not in ('meson', 'cmake', 'cmake@'):
              raise InterpreterException('"format" possible values are "meson", "cmake" or "cmake@".')
  
          if 'output_format' in kwargs:
              output_format = kwargs['output_format']
              if not isinstance(output_format, str):
                  raise InterpreterException('"output_format" keyword must be a string.')
          else:
              output_format = 'c'
  
          if output_format not in ('c', 'nasm'):
              raise InterpreterException('"format" possible values are "c" or "nasm".')
  
          if 'depfile' in kwargs:
              depfile = kwargs['depfile']
              if not isinstance(depfile, str):
                  raise InterpreterException('depfile file name must be a string')
          else:
              depfile = None
  
          # Validate input
          inputs = self.source_strings_to_files(extract_as_list(kwargs, 'input'))
          inputs_abs = []
          for f in inputs:
              if isinstance(f, mesonlib.File):
                  inputs_abs.append(f.absolute_path(self.environment.source_dir,
                                                    self.environment.build_dir))
                  self.add_build_def_file(f)
              else:
                  raise InterpreterException('Inputs can only be strings or file objects')
          # Validate output
          output = kwargs['output']
          if not isinstance(output, str):
              raise InterpreterException('Output file name must be a string')
          if inputs_abs:
              values = mesonlib.get_filenames_templates_dict(inputs_abs, None)
              outputs = mesonlib.substitute_values([output], values)
              output = outputs[0]
              if depfile:
                  depfile = mesonlib.substitute_values([depfile], values)[0]
          ofile_rpath = os.path.join(self.subdir, output)
          if ofile_rpath in self.configure_file_outputs:
              mesonbuildfile = os.path.join(self.subdir, 'meson.build')
              current_call = "{}:{}".format(mesonbuildfile, self.current_lineno)
              first_call = "{}:{}".format(mesonbuildfile, self.configure_file_outputs[ofile_rpath])
              mlog.warning('Output file', mlog.bold(ofile_rpath, True), 'for configure_file() at', current_call, 'overwrites configure_file() output at', first_call)
          else:
              self.configure_file_outputs[ofile_rpath] = self.current_lineno
          if os.path.dirname(output) != '':
              raise InterpreterException('Output file name must not contain a subdirectory.')
          (ofile_path, ofile_fname) = os.path.split(os.path.join(self.subdir, output))
          ofile_abs = os.path.join(self.environment.build_dir, ofile_path, ofile_fname)
          # Perform the appropriate action
          if 'configuration' in kwargs:
              conf = kwargs['configuration']
              if isinstance(conf, dict):
                  FeatureNew.single_use('configure_file.configuration dictionary', '0.49.0', self.subproject)
                  conf = ConfigurationDataHolder(self.subproject, conf)
              elif not isinstance(conf, ConfigurationDataHolder):
                  raise InterpreterException('Argument "configuration" is not of type configuration_data')
              mlog.log('Configuring', mlog.bold(output), 'using configuration')
              if len(inputs) > 1:
                  raise InterpreterException('At most one input file can given in configuration mode')
              if inputs:
                  os.makedirs(os.path.join(self.environment.build_dir, self.subdir), exist_ok=True)
                  file_encoding = kwargs.setdefault('encoding', 'utf-8')
                  missing_variables, confdata_useless = \
                      mesonlib.do_conf_file(inputs_abs[0], ofile_abs, conf.held_object,
                                            fmt, file_encoding)
                  if missing_variables:
                      var_list = ", ".join(map(repr, sorted(missing_variables)))
                      mlog.warning(
                          "The variable(s) %s in the input file '%s' are not "
                          "present in the given configuration data." % (
                              var_list, inputs[0]), location=node)
                  if confdata_useless:
                      ifbase = os.path.basename(inputs_abs[0])
                      mlog.warning('Got an empty configuration_data() object and found no '
                                   'substitutions in the input file {!r}. If you want to '
                                   'copy a file to the build dir, use the \'copy:\' keyword '
                                   'argument added in 0.47.0'.format(ifbase), location=node)
              else:
                  mesonlib.dump_conf_header(ofile_abs, conf.held_object, output_format)
              conf.mark_used()
          elif 'command' in kwargs:
              if len(inputs) > 1:
                  FeatureNew.single_use('multiple inputs in configure_file()', '0.52.0', self.subproject)
              # We use absolute paths for input and output here because the cwd
              # that the command is run from is 'unspecified', so it could change.
              # Currently it's builddir/subdir for in_builddir else srcdir/subdir.
              values = mesonlib.get_filenames_templates_dict(inputs_abs, [ofile_abs])
              if depfile:
                  depfile = os.path.join(self.environment.get_scratch_dir(), depfile)
                  values['@DEPFILE@'] = depfile
              # Substitute @INPUT@, @OUTPUT@, etc here.
              cmd = mesonlib.substitute_values(kwargs['command'], values)
              mlog.log('Configuring', mlog.bold(output), 'with command')
              res = self.run_command_impl(node, cmd,  {}, True)
              if res.returncode != 0:
                  raise InterpreterException('Running configure command failed.\n%s\n%s' %
                                             (res.stdout, res.stderr))
              if 'capture' in kwargs and kwargs['capture']:
                  dst_tmp = ofile_abs + '~'
                  file_encoding = kwargs.setdefault('encoding', 'utf-8')
                  with open(dst_tmp, 'w', encoding=file_encoding) as f:
                      f.writelines(res.stdout)
                  if inputs_abs:
                      shutil.copymode(inputs_abs[0], dst_tmp)
                  mesonlib.replace_if_different(ofile_abs, dst_tmp)
              if depfile:
                  mlog.log('Reading depfile:', mlog.bold(depfile))
                  with open(depfile, 'r') as f:
                      df = DepFile(f.readlines())
                      deps = df.get_all_dependencies(ofile_fname)
                      for dep in deps:
                          self.add_build_def_file(dep)
  
          elif 'copy' in kwargs:
              if len(inputs_abs) != 1:
                  raise InterpreterException('Exactly one input file must be given in copy mode')
              os.makedirs(os.path.join(self.environment.build_dir, self.subdir), exist_ok=True)
              shutil.copy2(inputs_abs[0], ofile_abs)
          else:
              # Not reachable
              raise AssertionError
          # Install file if requested, we check for the empty string
          # for backwards compatibility. That was the behaviour before
          # 0.45.0 so preserve it.
          idir = kwargs.get('install_dir', '')
          if idir is False:
              idir = ''
              mlog.deprecation('Please use the new `install:` kwarg instead of passing '
                               '`false` to `install_dir:`', location=node)
          if not isinstance(idir, str):
              if isinstance(idir, list) and len(idir) == 0:
                  mlog.deprecation('install_dir: kwarg must be a string and not an empty array. '
                                   'Please use the install: kwarg to enable or disable installation. '
                                   'This will be a hard error in the next release.')
              else:
                  raise InterpreterException('"install_dir" must be a string')
          install = kwargs.get('install', idir != '')
          if not isinstance(install, bool):
              raise InterpreterException('"install" must be a boolean')
          if install:
              if not idir:
                  raise InterpreterException('"install_dir" must be specified '
                                             'when "install" in a configure_file '
                                             'is true')
              cfile = mesonlib.File.from_built_file(ofile_path, ofile_fname)
              install_mode = self._get_kwarg_install_mode(kwargs)
              self.build.data.append(build.Data([cfile], idir, install_mode, self.subproject))
          return mesonlib.File.from_built_file(self.subdir, output)
  
      def extract_incdirs(self, kwargs):
          prospectives = unholder(extract_as_list(kwargs, 'include_directories'))
          result = []
          for p in prospectives:
              if isinstance(p, build.IncludeDirs):
                  result.append(p)
              elif isinstance(p, str):
                  result.append(self.build_incdir_object([p]).held_object)
              else:
                  raise InterpreterException('Include directory objects can only be created from strings or include directories.')
          return result
  
      @permittedKwargs(permitted_kwargs['include_directories'])
      @stringArgs
      def func_include_directories(self, node, args, kwargs):
          return self.build_incdir_object(args, kwargs.get('is_system', False))
  
      def build_incdir_object(self, incdir_strings, is_system=False):
          if not isinstance(is_system, bool):
              raise InvalidArguments('Is_system must be boolean.')
          src_root = self.environment.get_source_dir()
          build_root = self.environment.get_build_dir()
          absbase_src = os.path.join(src_root, self.subdir)
          absbase_build = os.path.join(build_root, self.subdir)
  
          for a in incdir_strings:
              if a.startswith(src_root):
                  raise InvalidArguments('Tried to form an absolute path to a source dir. '
                                         'You should not do that but use relative paths instead.'
                                         '''
  
  To get include path to any directory relative to the current dir do
  
  incdir = include_directories(dirname)
  
  After this incdir will contain both the current source dir as well as the
  corresponding build dir. It can then be used in any subdirectory and
  Meson will take care of all the busywork to make paths work.
  
  Dirname can even be '.' to mark the current directory. Though you should
  remember that the current source and build directories are always
  put in the include directories by default so you only need to do
  include_directories('.') if you intend to use the result in a
  different subdirectory.
  ''')
              absdir_src = os.path.join(absbase_src, a)
              absdir_build = os.path.join(absbase_build, a)
              if not os.path.isdir(absdir_src) and not os.path.isdir(absdir_build):
                  raise InvalidArguments('Include dir %s does not exist.' % a)
          i = IncludeDirsHolder(build.IncludeDirs(self.subdir, incdir_strings, is_system))
          return i
  
      @permittedKwargs(permitted_kwargs['add_test_setup'])
      @stringArgs
      def func_add_test_setup(self, node, args, kwargs):
          if len(args) != 1:
              raise InterpreterException('Add_test_setup needs one argument for the setup name.')
          setup_name = args[0]
          if re.fullmatch('([_a-zA-Z][_0-9a-zA-Z]*:)?[_a-zA-Z][_0-9a-zA-Z]*', setup_name) is None:
              raise InterpreterException('Setup name may only contain alphanumeric characters.')
          if ":" not in setup_name:
              setup_name = (self.subproject if self.subproject else self.build.project_name) + ":" + setup_name
          try:
              inp = unholder(extract_as_list(kwargs, 'exe_wrapper'))
              exe_wrapper = []
              for i in inp:
                  if isinstance(i, str):
                      exe_wrapper.append(i)
                  elif isinstance(i, dependencies.ExternalProgram):
                      if not i.found():
                          raise InterpreterException('Tried to use non-found executable.')
                      exe_wrapper += i.get_command()
                  else:
                      raise InterpreterException('Exe wrapper can only contain strings or external binaries.')
          except KeyError:
              exe_wrapper = None
          gdb = kwargs.get('gdb', False)
          if not isinstance(gdb, bool):
              raise InterpreterException('Gdb option must be a boolean')
          timeout_multiplier = kwargs.get('timeout_multiplier', 1)
          if not isinstance(timeout_multiplier, int):
              raise InterpreterException('Timeout multiplier must be a number.')
          if timeout_multiplier <= 0:
              FeatureNew('add_test_setup() timeout_multiplier <= 0', '0.57.0').use(self.subproject)
          is_default = kwargs.get('is_default', False)
          if not isinstance(is_default, bool):
              raise InterpreterException('is_default option must be a boolean')
          if is_default:
              if self.build.test_setup_default_name is not None:
                  raise InterpreterException('\'%s\' is already set as default. '
                                             'is_default can be set to true only once' % self.build.test_setup_default_name)
              self.build.test_setup_default_name = setup_name
          exclude_suites = mesonlib.stringlistify(kwargs.get('exclude_suites', []))
          env = self.unpack_env_kwarg(kwargs)
          self.build.test_setups[setup_name] = build.TestSetup(exe_wrapper, gdb, timeout_multiplier, env,
                                                               exclude_suites)
  
      @permittedKwargs(permitted_kwargs['add_global_arguments'])
      @stringArgs
      def func_add_global_arguments(self, node, args, kwargs):
          for_machine = self.machine_from_native_kwarg(kwargs)
          self.add_global_arguments(node, self.build.global_args[for_machine], args, kwargs)
  
      @permittedKwargs(permitted_kwargs['add_global_link_arguments'])
      @stringArgs
      def func_add_global_link_arguments(self, node, args, kwargs):
          for_machine = self.machine_from_native_kwarg(kwargs)
          self.add_global_arguments(node, self.build.global_link_args[for_machine], args, kwargs)
  
      @permittedKwargs(permitted_kwargs['add_project_arguments'])
      @stringArgs
      def func_add_project_arguments(self, node, args, kwargs):
          for_machine = self.machine_from_native_kwarg(kwargs)
          self.add_project_arguments(node, self.build.projects_args[for_machine], args, kwargs)
  
      @permittedKwargs(permitted_kwargs['add_project_link_arguments'])
      @stringArgs
      def func_add_project_link_arguments(self, node, args, kwargs):
          for_machine = self.machine_from_native_kwarg(kwargs)
          self.add_project_arguments(node, self.build.projects_link_args[for_machine], args, kwargs)
  
      def warn_about_builtin_args(self, args):
          # -Wpedantic is deliberately not included, since some people want to use it but not use -Wextra
          # see e.g.
          # https://github.com/mesonbuild/meson/issues/3275#issuecomment-641354956
          # https://github.com/mesonbuild/meson/issues/3742
          warnargs = ('/W1', '/W2', '/W3', '/W4', '/Wall', '-Wall', '-Wextra')
          optargs = ('-O0', '-O2', '-O3', '-Os', '/O1', '/O2', '/Os')
          for arg in args:
              if arg in warnargs:
                  mlog.warning('Consider using the built-in warning_level option instead of using "{}".'.format(arg),
                               location=self.current_node)
              elif arg in optargs:
                  mlog.warning('Consider using the built-in optimization level instead of using "{}".'.format(arg),
                               location=self.current_node)
              elif arg == '-Werror':
                  mlog.warning('Consider using the built-in werror option instead of using "{}".'.format(arg),
                               location=self.current_node)
              elif arg == '-g':
                  mlog.warning('Consider using the built-in debug option instead of using "{}".'.format(arg),
                               location=self.current_node)
              elif arg == '-pipe':
                  mlog.warning("You don't need to add -pipe, Meson will use it automatically when it is available.",
                               location=self.current_node)
              elif arg.startswith('-fsanitize'):
                  mlog.warning('Consider using the built-in option for sanitizers instead of using "{}".'.format(arg),
                               location=self.current_node)
              elif arg.startswith('-std=') or arg.startswith('/std:'):
                  mlog.warning('Consider using the built-in option for language standard version instead of using "{}".'.format(arg),
                               location=self.current_node)
  
      def add_global_arguments(self, node, argsdict, args, kwargs):
          if self.is_subproject():
              msg = 'Function \'{}\' cannot be used in subprojects because ' \
                    'there is no way to make that reliable.\nPlease only call ' \
                    'this if is_subproject() returns false. Alternatively, ' \
                    'define a variable that\ncontains your language-specific ' \
                    'arguments and add it to the appropriate *_args kwarg ' \
                    'in each target.'.format(node.func_name)
              raise InvalidCode(msg)
          frozen = self.project_args_frozen or self.global_args_frozen
          self.add_arguments(node, argsdict, frozen, args, kwargs)
  
      def add_project_arguments(self, node, argsdict, args, kwargs):
          if self.subproject not in argsdict:
              argsdict[self.subproject] = {}
          self.add_arguments(node, argsdict[self.subproject],
                             self.project_args_frozen, args, kwargs)
  
      def add_arguments(self, node, argsdict, args_frozen, args, kwargs):
          if args_frozen:
              msg = 'Tried to use \'{}\' after a build target has been declared.\n' \
                    'This is not permitted. Please declare all ' \
                    'arguments before your targets.'.format(node.func_name)
              raise InvalidCode(msg)
  
          if 'language' not in kwargs:
              raise InvalidCode('Missing language definition in {}'.format(node.func_name))
  
          self.warn_about_builtin_args(args)
  
          for lang in mesonlib.stringlistify(kwargs['language']):
              lang = lang.lower()
              argsdict[lang] = argsdict.get(lang, []) + args
  
      @noKwargs
      @noArgsFlattening
      def func_environment(self, node, args, kwargs):
          if len(args) > 1:
              raise InterpreterException('environment takes only one optional positional arguments')
          elif len(args) == 1:
              FeatureNew.single_use('environment positional arguments', '0.52.0', self.subproject)
              initial_values = args[0]
              if not isinstance(initial_values, dict) and not isinstance(initial_values, list):
                  raise InterpreterException('environment first argument must be a dictionary or a list')
          else:
              initial_values = {}
          return EnvironmentVariablesHolder(initial_values)
  
      @stringArgs
      @noKwargs
      def func_join_paths(self, node, args, kwargs):
          return self.join_path_strings(args)
  
      def run(self) -> None:
          super().run()
          mlog.log('Build targets in project:', mlog.bold(str(len(self.build.targets))))
          FeatureNew.report(self.subproject)
          FeatureDeprecated.report(self.subproject)
          if not self.is_subproject():
              self.print_extra_warnings()
          if self.subproject == '':
              self._print_summary()
  
      def print_extra_warnings(self) -> None:
          # TODO cross compilation
          for c in self.coredata.compilers.host.values():
              if c.get_id() == 'clang':
                  self.check_clang_asan_lundef()
                  break
  
      def check_clang_asan_lundef(self) -> None:
          if OptionKey('b_lundef') not in self.coredata.options:
              return
          if OptionKey('b_sanitize') not in self.coredata.options:
              return
          if (self.coredata.options[OptionKey('b_lundef')].value and
                  self.coredata.options[OptionKey('b_sanitize')].value != 'none'):
              mlog.warning('''Trying to use {} sanitizer on Clang with b_lundef.
  This will probably not work.
  Try setting b_lundef to false instead.'''.format(self.coredata.options[OptionKey('b_sanitize')].value),
                           location=self.current_node)
  
      # Check that the indicated file is within the same subproject
      # as we currently are. This is to stop people doing
      # nasty things like:
      #
      # f = files('../../master_src/file.c')
      #
      # Note that this is validated only when the file
      # object is generated. The result can be used in a different
      # subproject than it is defined in (due to e.g. a
      # declare_dependency).
      def validate_within_subproject(self, subdir, fname):
          srcdir = Path(self.environment.source_dir)
          norm = Path(srcdir, subdir, fname).resolve()
          if srcdir not in norm.parents:
              # Grabbing files outside the source tree is ok.
              # This is for vendor stuff like:
              #
              # /opt/vendorsdk/src/file_with_license_restrictions.c
              return
          project_root = Path(srcdir, self.root_subdir)
          if project_root not in norm.parents:
              raise InterpreterException('Sandbox violation: Tried to grab file {} outside current (sub)project.'.format(norm.name))
          if project_root / self.subproject_dir in norm.parents:
              raise InterpreterException('Sandbox violation: Tried to grab file {} from a nested subproject.'.format(norm.name))
  
      def source_strings_to_files(self, sources: T.List[str]) -> T.List[mesonlib.File]:
          mesonlib.check_direntry_issues(sources)
          if not isinstance(sources, list):
              sources = [sources]
          results: T.List[mesonlib.File] = []
          for s in sources:
              if isinstance(s, (mesonlib.File, GeneratedListHolder,
                                TargetHolder, CustomTargetIndexHolder,
                                GeneratedObjectsHolder)):
                  pass
              elif isinstance(s, str):
                  self.validate_within_subproject(self.subdir, s)
                  s = mesonlib.File.from_source_file(self.environment.source_dir, self.subdir, s)
              else:
                  raise InterpreterException('Source item is {!r} instead of '
                                             'string or File-type object'.format(s))
              results.append(s)
          return results
  
      def add_target(self, name, tobj):
          if name == '':
              raise InterpreterException('Target name must not be empty.')
          if name.strip() == '':
              raise InterpreterException('Target name must not consist only of whitespace.')
          if name.startswith('meson-'):
              raise InvalidArguments("Target names starting with 'meson-' are reserved "
                                     "for Meson's internal use. Please rename.")
          if name in coredata.FORBIDDEN_TARGET_NAMES:
              raise InvalidArguments("Target name '%s' is reserved for Meson's "
                                     "internal use. Please rename." % name)
          # To permit an executable and a shared library to have the
          # same name, such as "foo.exe" and "libfoo.a".
          idname = tobj.get_id()
          if idname in self.build.targets:
              raise InvalidCode('Tried to create target "%s", but a target of that name already exists.' % name)
          self.build.targets[idname] = tobj
          if idname not in self.coredata.target_guids:
              self.coredata.target_guids[idname] = str(uuid.uuid4()).upper()
  
      @FeatureNew('both_libraries', '0.46.0')
      def build_both_libraries(self, node, args, kwargs):
          shared_holder = self.build_target(node, args, kwargs, SharedLibraryHolder)
  
          # Check if user forces non-PIC static library.
          pic = True
          key = OptionKey('b_staticpic')
          if 'pic' in kwargs:
              pic = kwargs['pic']
          elif key in self.environment.coredata.options:
              pic = self.environment.coredata.options[key].value
  
          if pic:
              # Exclude sources from args and kwargs to avoid building them twice
              static_args = [args[0]]
              static_kwargs = kwargs.copy()
              static_kwargs['sources'] = []
              static_kwargs['objects'] = shared_holder.held_object.extract_all_objects()
          else:
              static_args = args
              static_kwargs = kwargs
  
          static_holder = self.build_target(node, static_args, static_kwargs, StaticLibraryHolder)
  
          return BothLibrariesHolder(shared_holder, static_holder, self)
  
      def build_library(self, node, args, kwargs):
          default_library = self.coredata.get_option(OptionKey('default_library', subproject=self.subproject))
          if default_library == 'shared':
              return self.build_target(node, args, kwargs, SharedLibraryHolder)
          elif default_library == 'static':
              return self.build_target(node, args, kwargs, StaticLibraryHolder)
          elif default_library == 'both':
              return self.build_both_libraries(node, args, kwargs)
          else:
              raise InterpreterException('Unknown default_library value: %s.', default_library)
  
      def build_target(self, node, args, kwargs, targetholder):
          @FeatureNewKwargs('build target', '0.42.0', ['rust_crate_type', 'build_rpath', 'implicit_include_directories'])
          @FeatureNewKwargs('build target', '0.41.0', ['rust_args'])
          @FeatureNewKwargs('build target', '0.40.0', ['build_by_default'])
          @FeatureNewKwargs('build target', '0.48.0', ['gnu_symbol_visibility'])
          def build_target_decorator_caller(self, node, args, kwargs):
              return True
  
          build_target_decorator_caller(self, node, args, kwargs)
  
          if not args:
              raise InterpreterException('Target does not have a name.')
          name, *sources = args
          for_machine = self.machine_from_native_kwarg(kwargs)
          if 'sources' in kwargs:
              sources += listify(kwargs['sources'])
          sources = self.source_strings_to_files(sources)
          objs = extract_as_list(kwargs, 'objects')
          kwargs['dependencies'] = extract_as_list(kwargs, 'dependencies')
          kwargs['install_mode'] = self._get_kwarg_install_mode(kwargs)
          if 'extra_files' in kwargs:
              ef = extract_as_list(kwargs, 'extra_files')
              kwargs['extra_files'] = self.source_strings_to_files(ef)
          self.check_sources_exist(os.path.join(self.source_root, self.subdir), sources)
          if targetholder == ExecutableHolder:
              targetclass = build.Executable
          elif targetholder == SharedLibraryHolder:
              targetclass = build.SharedLibrary
          elif targetholder == SharedModuleHolder:
              targetclass = build.SharedModule
          elif targetholder == StaticLibraryHolder:
              targetclass = build.StaticLibrary
          elif targetholder == JarHolder:
              targetclass = build.Jar
          else:
              mlog.debug('Unknown target type:', str(targetholder))
              raise RuntimeError('Unreachable code')
          self.kwarg_strings_to_includedirs(kwargs)
  
          # Filter out kwargs from other target types. For example 'soversion'
          # passed to library() when default_library == 'static'.
          kwargs = {k: v for k, v in kwargs.items() if k in targetclass.known_kwargs}
  
          kwargs['include_directories'] = self.extract_incdirs(kwargs)
          target = targetclass(name, self.subdir, self.subproject, for_machine, sources, objs, self.environment, kwargs)
          target.project_version = self.project_version
  
          self.add_stdlib_info(target)
          l = targetholder(target, self)
          self.add_target(name, l.held_object)
          self.project_args_frozen = True
          return l
  
      def kwarg_strings_to_includedirs(self, kwargs):
          if 'd_import_dirs' in kwargs:
              items = mesonlib.extract_as_list(kwargs, 'd_import_dirs')
              cleaned_items = []
              for i in items:
                  if isinstance(i, str):
                      # BW compatibility. This was permitted so we must support it
                      # for a few releases so people can transition to "correct"
                      # path declarations.
                      if os.path.normpath(i).startswith(self.environment.get_source_dir()):
                          mlog.warning('''Building a path to the source dir is not supported. Use a relative path instead.
  This will become a hard error in the future.''', location=self.current_node)
                          i = os.path.relpath(i, os.path.join(self.environment.get_source_dir(), self.subdir))
                          i = self.build_incdir_object([i])
                  cleaned_items.append(i)
              kwargs['d_import_dirs'] = cleaned_items
  
      def get_used_languages(self, target):
          result = set()
          for i in target.sources:
              for lang, c in self.coredata.compilers[target.for_machine].items():
                  if c.can_compile(i):
                      result.add(lang)
                      break
          return result
  
      def add_stdlib_info(self, target):
          for l in self.get_used_languages(target):
              dep = self.build.stdlibs[target.for_machine].get(l, None)
              if dep:
                  target.add_deps(dep)
  
      def check_sources_exist(self, subdir, sources):
          for s in sources:
              if not isinstance(s, str):
                  continue # This means a generated source and they always exist.
              fname = os.path.join(subdir, s)
              if not os.path.isfile(fname):
                  raise InterpreterException('Tried to add non-existing source file %s.' % s)
  
      # Only permit object extraction from the same subproject
      def validate_extraction(self, buildtarget: InterpreterObject) -> None:
          if self.subproject != buildtarget.subproject:
              raise InterpreterException('Tried to extract objects from a different subproject.')
  
      def is_subproject(self):
          return self.subproject != ''
  
      @noKwargs
      @noArgsFlattening
      def func_set_variable(self, node, args, kwargs):
          if len(args) != 2:
              raise InvalidCode('Set_variable takes two arguments.')
          varname, value = args
          self.set_variable(varname, value)
  
      @noKwargs
      @noArgsFlattening
      def func_get_variable(self, node, args, kwargs):
          if len(args) < 1 or len(args) > 2:
              raise InvalidCode('Get_variable takes one or two arguments.')
          varname = args[0]
          if isinstance(varname, Disabler):
              return varname
          if not isinstance(varname, str):
              raise InterpreterException('First argument must be a string.')
          try:
              return self.variables[varname]
          except KeyError:
              pass
          if len(args) == 2:
              return args[1]
          raise InterpreterException('Tried to get unknown variable "%s".' % varname)
  
      @stringArgs
      @noKwargs
      def func_is_variable(self, node, args, kwargs):
          if len(args) != 1:
              raise InvalidCode('Is_variable takes two arguments.')
          varname = args[0]
          return varname in self.variables
  
      @staticmethod
      def machine_from_native_kwarg(kwargs: T.Dict[str, T.Any]) -> MachineChoice:
          native = kwargs.get('native', False)
          if not isinstance(native, bool):
              raise InvalidArguments('Argument to "native" must be a boolean.')
          return MachineChoice.BUILD if native else MachineChoice.HOST
  
      @FeatureNew('is_disabler', '0.52.0')
      @noKwargs
      def func_is_disabler(self, node, args, kwargs):
          if len(args) != 1:
              raise InvalidCode('Is_disabler takes one argument.')
          varname = args[0]
          return isinstance(varname, Disabler)
  