files: # Copyright 2012-2018 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from . import mlog
  import pickle, os, uuid
  import sys
  from pathlib import PurePath
  from collections import OrderedDict
  from .mesonlib import MesonException
  from .mesonlib import default_libdir, default_libexecdir, default_prefix
  import ast
  
  version = '0.45.0.dev1'
  backendlist = ['ninja', 'vs', 'vs2010', 'vs2015', 'vs2017', 'xcode']
  
  default_yielding = False
  
  class UserOption:
      def __init__(self, name, description, choices, yielding):
          super().__init__()
          self.name = name
          self.choices = choices
          self.description = description
          if yielding is None:
              yielding = default_yielding
          if not isinstance(yielding, bool):
              raise MesonException('Value of "yielding" must be a boolean.')
          self.yielding = yielding
  
      # Check that the input is a valid value and return the
      # "cleaned" or "native" version. For example the Boolean
      # option could take the string "true" and return True.
      def validate_value(self, value):
          raise RuntimeError('Derived option class did not override validate_value.')
  
  class UserStringOption(UserOption):
      def __init__(self, name, description, value, choices=None, yielding=None):
          super().__init__(name, description, choices, yielding)
          self.set_value(value)
  
      def validate(self, value):
          if not isinstance(value, str):
              raise MesonException('Value "%s" for string option "%s" is not a string.' % (str(value), self.name))
  
      def set_value(self, newvalue):
          self.validate(newvalue)
          self.value = newvalue
  
      def validate_value(self, value):
          self.validate(value)
          return value
  
  class UserBooleanOption(UserOption):
      def __init__(self, name, description, value, yielding=None):
          super().__init__(name, description, [True, False], yielding)
          self.set_value(value)
  
      def tobool(self, thing):
          if isinstance(thing, bool):
              return thing
          if thing.lower() == 'true':
              return True
          if thing.lower() == 'false':
              return False
          raise MesonException('Value %s is not boolean (true or false).' % thing)
  
      def set_value(self, newvalue):
          self.value = self.tobool(newvalue)
  
      def __bool__(self):
          return self.value
  
      def validate_value(self, value):
          return self.tobool(value)
  
  class UserIntegerOption(UserOption):
      def __init__(self, name, description, min_value, max_value, value, yielding=None):
          super().__init__(name, description, [True, False], yielding)
          self.min_value = min_value
          self.max_value = max_value
          self.set_value(value)
          c = []
          if min_value is not None:
              c.append('>=' + str(min_value))
          if max_value is not None:
              c.append('<=' + str(max_value))
          self.choices = ', '.join(c)
  
      def set_value(self, newvalue):
          if isinstance(newvalue, str):
              newvalue = self.toint(newvalue)
          if not isinstance(newvalue, int):
              raise MesonException('New value for integer option is not an integer.')
          if self.min_value is not None and newvalue < self.min_value:
              raise MesonException('New value %d is less than minimum value %d.' % (newvalue, self.min_value))
          if self.max_value is not None and newvalue > self.max_value:
              raise MesonException('New value %d is more than maximum value %d.' % (newvalue, self.max_value))
          self.value = newvalue
  
      def toint(self, valuestring):
          try:
              return int(valuestring)
          except:
              raise MesonException('Value string "%s" is not convertable to an integer.' % valuestring)
  
      def validate_value(self, value):
          return self.toint(value)
  
  class UserComboOption(UserOption):
      def __init__(self, name, description, choices, value, yielding=None):
          super().__init__(name, description, choices, yielding)
          if not isinstance(self.choices, list):
              raise MesonException('Combo choices must be an array.')
          for i in self.choices:
              if not isinstance(i, str):
                  raise MesonException('Combo choice elements must be strings.')
          self.set_value(value)
  
      def set_value(self, newvalue):
          if newvalue not in self.choices:
              optionsstring = ', '.join(['"%s"' % (item,) for item in self.choices])
              raise MesonException('Value "%s" for combo option "%s" is not one of the choices. Possible choices are: %s.' % (newvalue, self.name, optionsstring))
          self.value = newvalue
  
      def validate_value(self, value):
          if value not in self.choices:
              raise MesonException('Value %s not one of accepted values.' % value)
          return value
  
  class UserArrayOption(UserOption):
      def __init__(self, name, description, value, **kwargs):
          super().__init__(name, description, kwargs.get('choices', []), yielding=kwargs.get('yielding', None))
          self.set_value(value, user_input=False)
  
      def validate(self, value, user_input):
          # User input is for options defined on the command line (via -D
          # options). Users can put their input in as a comma separated
          # string, but for defining options in meson_options.txt the format
          # should match that of a combo
          if not user_input:
              if isinstance(value, str):
                  if not value.startswith('['):
                      raise MesonException('Valuestring does not define an array: ' + value)
                  newvalue = ast.literal_eval(value)
              else:
                  newvalue = value
          else:
              assert isinstance(value, str)
              if value.startswith('['):
                  newvalue = ast.literal_eval(value)
              else:
                  newvalue = [v.strip() for v in value.split(',')]
                  if len(set(newvalue)) != len(newvalue):
                      mlog.log(mlog.red('DEPRECATION:'), '''Duplicated values in an array type is deprecated.
  This will become a hard error in the future.''')
          if not isinstance(newvalue, list):
              raise MesonException('"{0}" should be a string array, but it is not'.format(str(newvalue)))
          for i in newvalue:
              if not isinstance(i, str):
                  raise MesonException('String array element "{0}" is not a string.'.format(str(newvalue)))
          if self.choices:
              bad = [x for x in newvalue if x not in self.choices]
              if bad:
                  raise MesonException('Options "{}" are not in allowed choices: "{}"'.format(
                      ', '.join(bad), ', '.join(self.choices)))
          return newvalue
  
      def set_value(self, newvalue, user_input=True):
          self.value = self.validate(newvalue, user_input)
  
      def validate_value(self, value):
          self.validate(value)
          return value
  
  # This class contains all data that must persist over multiple
  # invocations of Meson. It is roughly the same thing as
  # cmakecache.
  
  class CoreData:
  
      def __init__(self, options):
          self.guid = str(uuid.uuid4()).upper()
          self.test_guid = str(uuid.uuid4()).upper()
          self.regen_guid = str(uuid.uuid4()).upper()
          self.target_guids = {}
          self.version = version
          self.init_builtins(options)
          self.init_backend_options(self.builtins['backend'].value)
          self.user_options = {}
          self.compiler_options = {}
          self.base_options = {}
          # These external_*args, are set via env vars CFLAGS, LDFLAGS, etc
          # but only when not cross-compiling.
          self.external_preprocess_args = {} # CPPFLAGS only
          self.external_args = {} # CPPFLAGS + CFLAGS
          self.external_link_args = {} # CFLAGS + LDFLAGS (with MSVC: only LDFLAGS)
          self.cross_file = self.__load_cross_file(options.cross_file)
          self.wrap_mode = options.wrap_mode
          self.compilers = OrderedDict()
          self.cross_compilers = OrderedDict()
          self.deps = OrderedDict()
          self.modules = {}
          # Only to print a warning if it changes between Meson invocations.
          self.pkgconf_envvar = os.environ.get('PKG_CONFIG_PATH', '')
  
      @staticmethod
      def __load_cross_file(filename):
          """Try to load the cross file.
  
          If the filename is None return None. If the filename is an absolute
          (after resolving variables and ~), return that absolute path. Next,
          check if the file is relative to the current source dir. If the path
          still isn't resolved do the following:
              Windows:
                  - Error
              *:
                  - $XDG_DATA_HOME/meson/cross (or ~/.local/share/meson/cross if
                    undefined)
                  - $XDG_DATA_DIRS/meson/cross (or
                    /usr/local/share/meson/cross:/usr/share/meson/cross if undefined)
                  - Error
  
          Non-Windows follows the Linux path and will honor XDG_* if set. This
          simplifies the implementation somewhat.
          """
          if filename is None:
              return None
          filename = os.path.expanduser(os.path.expandvars(filename))
          if os.path.isabs(filename):
              return filename
          path_to_try = os.path.abspath(filename)
          if os.path.exists(path_to_try):
              return path_to_try
          if sys.platform != 'win32':
              paths = [
                  os.environ.get('XDG_DATA_HOME', os.path.expanduser('~/.local/share')),
              ] + os.environ.get('XDG_DATA_DIRS', '/usr/local/share:/usr/share').split(':')
              for path in paths:
                  path_to_try = os.path.join(path, 'meson', 'cross', filename)
                  if os.path.exists(path_to_try):
                      return path_to_try
              raise MesonException('Cannot find specified cross file: ' + filename)
  
          raise MesonException('Cannot find specified cross file: ' + filename)
  
      def sanitize_prefix(self, prefix):
          if not os.path.isabs(prefix):
              raise MesonException('prefix value {!r} must be an absolute path'
                                   ''.format(prefix))
          if prefix.endswith('/') or prefix.endswith('\\'):
              # On Windows we need to preserve the trailing slash if the
              # string is of type 'C:\' because 'C:' is not an absolute path.
              if len(prefix) == 3 and prefix[1] == ':':
                  pass
              # If prefix is a single character, preserve it since it is
              # the root directory.
              elif len(prefix) == 1:
                  pass
              else:
                  prefix = prefix[:-1]
          return prefix
  
      def sanitize_dir_option_value(self, prefix, option, value):
          '''
          If the option is an installation directory option and the value is an
          absolute path, check that it resides within prefix and return the value
          as a path relative to the prefix.
  
          This way everyone can do f.ex, get_option('libdir') and be sure to get
          the library directory relative to prefix.
          '''
          if option.endswith('dir') and os.path.isabs(value) and \
             option not in builtin_dir_noprefix_options:
              # Value must be a subdir of the prefix
              # commonpath will always return a path in the native format, so we
              # must use pathlib.PurePath to do the same conversion before
              # comparing.
              if os.path.commonpath([value, prefix]) != str(PurePath(prefix)):
                  m = 'The value of the {!r} option is {!r} which must be a ' \
                      'subdir of the prefix {!r}.\nNote that if you pass a ' \
                      'relative path, it is assumed to be a subdir of prefix.'
                  raise MesonException(m.format(option, value, prefix))
              # Convert path to be relative to prefix
              skip = len(prefix) + 1
              value = value[skip:]
          return value
  
      def init_builtins(self, options):
          self.builtins = {}
          # Sanitize prefix
          options.prefix = self.sanitize_prefix(options.prefix)
          # Initialize other builtin options
          for key in get_builtin_options():
              if hasattr(options, key):
                  value = getattr(options, key)
                  value = self.sanitize_dir_option_value(options.prefix, key, value)
                  setattr(options, key, value)
              else:
                  value = get_builtin_option_default(key, prefix=options.prefix)
              args = [key] + builtin_options[key][1:-1] + [value]
              self.builtins[key] = builtin_options[key][0](*args)
  
      def init_backend_options(self, backend_name):
          self.backend_options = {}
          if backend_name == 'ninja':
              self.backend_options['backend_max_links'] = UserIntegerOption('backend_max_links',
                                                                            'Maximum number of linker processes to run or 0 for no limit',
                                                                            0, None, 0)
  
      def get_builtin_option(self, optname):
          if optname in self.builtins:
              return self.builtins[optname].value
          raise RuntimeError('Tried to get unknown builtin option %s.' % optname)
  
      def set_builtin_option(self, optname, value):
          if optname == 'prefix':
              value = self.sanitize_prefix(value)
          elif optname in self.builtins:
              prefix = self.builtins['prefix'].value
              value = self.sanitize_dir_option_value(prefix, optname, value)
          else:
              raise RuntimeError('Tried to set unknown builtin option %s.' % optname)
          self.builtins[optname].set_value(value)
  
      def validate_option_value(self, option_name, override_value):
          for opts in (self.builtins, self.base_options, self.compiler_options, self.user_options):
              if option_name in opts:
                  opt = opts[option_name]
                  return opt.validate_value(override_value)
          raise MesonException('Tried to validate unknown option %s.' % option_name)
  
  def load(filename):
      load_fail_msg = 'Coredata file {!r} is corrupted. Try with a fresh build tree.'.format(filename)
      try:
          with open(filename, 'rb') as f:
              obj = pickle.load(f)
      except pickle.UnpicklingError:
          raise MesonException(load_fail_msg)
      if not isinstance(obj, CoreData):
          raise MesonException(load_fail_msg)
      if obj.version != version:
          raise MesonException('Build directory has been generated with Meson version %s, which is incompatible with current version %s.\nPlease delete this build directory AND create a new one.' %
                               (obj.version, version))
      return obj
  
  def save(obj, filename):
      if obj.version != version:
          raise MesonException('Fatal version mismatch corruption.')
      with open(filename, 'wb') as f:
          pickle.dump(obj, f)
  
  def get_builtin_options():
      return list(builtin_options.keys())
  
  def is_builtin_option(optname):
      return optname in get_builtin_options()
  
  def get_builtin_option_choices(optname):
      if is_builtin_option(optname):
          if builtin_options[optname][0] == UserStringOption:
              return None
          elif builtin_options[optname][0] == UserBooleanOption:
              return [True, False]
          else:
              return builtin_options[optname][2]
      else:
          raise RuntimeError('Tried to get the supported values for an unknown builtin option \'%s\'.' % optname)
  
  def get_builtin_option_description(optname):
      if is_builtin_option(optname):
          return builtin_options[optname][1]
      else:
          raise RuntimeError('Tried to get the description for an unknown builtin option \'%s\'.' % optname)
  
  def get_builtin_option_default(optname, prefix='', noneIfSuppress=False):
      if is_builtin_option(optname):
          o = builtin_options[optname]
          if o[0] == UserComboOption:
              return o[3]
          if optname in builtin_dir_noprefix_options:
              if noneIfSuppress:
                  # Return None if argparse defaulting should be suppressed for
                  # this option (so we can determine the default later based on
                  # prefix)
                  return None
              elif prefix in builtin_dir_noprefix_options[optname]:
                  return builtin_dir_noprefix_options[optname][prefix]
          return o[2]
      else:
          raise RuntimeError('Tried to get the default value for an unknown builtin option \'%s\'.' % optname)
  
  builtin_options = {
      'buildtype':  [UserComboOption, 'Build type to use.', ['plain', 'debug', 'debugoptimized', 'release', 'minsize'], 'debug'],
      'strip':      [UserBooleanOption, 'Strip targets on install.', False],
      'unity':      [UserComboOption, 'Unity build.', ['on', 'off', 'subprojects'], 'off'],
      'prefix':     [UserStringOption, 'Installation prefix.', default_prefix()],
      'libdir':     [UserStringOption, 'Library directory.', default_libdir()],
      'libexecdir': [UserStringOption, 'Library executable directory.', default_libexecdir()],
      'bindir':     [UserStringOption, 'Executable directory.', 'bin'],
      'sbindir':    [UserStringOption, 'System executable directory.', 'sbin'],
      'includedir': [UserStringOption, 'Header file directory.', 'include'],
      'datadir':    [UserStringOption, 'Data file directory.', 'share'],
      'mandir':     [UserStringOption, 'Manual page directory.', 'share/man'],
      'infodir':    [UserStringOption, 'Info page directory.', 'share/info'],
      'localedir':  [UserStringOption, 'Locale data directory.', 'share/locale'],
      'sysconfdir':      [UserStringOption, 'Sysconf data directory.', 'etc'],
      'localstatedir':   [UserStringOption, 'Localstate data directory.', 'var'],
      'sharedstatedir':  [UserStringOption, 'Architecture-independent data directory.', 'com'],
      'werror':          [UserBooleanOption, 'Treat warnings as errors.', False],
      'warning_level':   [UserComboOption, 'Compiler warning level to use.', ['1', '2', '3'], '1'],
      'layout':          [UserComboOption, 'Build directory layout.', ['mirror', 'flat'], 'mirror'],
      'default_library': [UserComboOption, 'Default library type.', ['shared', 'static'], 'shared'],
      'backend':         [UserComboOption, 'Backend to use.', backendlist, 'ninja'],
      'stdsplit':        [UserBooleanOption, 'Split stdout and stderr in test logs.', True],
      'errorlogs':       [UserBooleanOption, "Whether to print the logs from failing tests.", True],
  }
  
  # Special prefix-dependent defaults for installation directories that reside in
  # a path outside of the prefix in FHS and common usage.
  builtin_dir_noprefix_options = {
      'sysconfdir':     {'/usr': '/etc'},
      'localstatedir':  {'/usr': '/var',     '/usr/local': '/var/local'},
      'sharedstatedir': {'/usr': '/var/lib', '/usr/local': '/var/local/lib'},
  }
  
  forbidden_target_names = {'clean': None,
                            'clean-ctlist': None,
                            'clean-gcno': None,
                            'clean-gcda': None,
                            'coverage': None,
                            'coverage-text': None,
                            'coverage-xml': None,
                            'coverage-html': None,
                            'phony': None,
                            'PHONY': None,
                            'all': None,
                            'test': None,
                            'benchmark': None,
                            'install': None,
                            'uninstall': None,
                            'build.ninja': None,
                            'scan-build': None,
                            'reconfigure': None,
                            'dist': None,
                            'distcheck': None,
                            }
  
  
  [... the rest is omitted ...]
files: mesonbuild/coredata.py
files: # Copyright 2012-2018 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from . import mlog
  import pickle, os, uuid
  import sys
  from pathlib import PurePath
  from collections import OrderedDict
  from .mesonlib import MesonException
  from .mesonlib import default_libdir, default_libexecdir, default_prefix
  import ast
  
  version = '0.45.0.dev1'
  backendlist = ['ninja', 'vs', 'vs2010', 'vs2015', 'vs2017', 'xcode']
  
  default_yielding = False
  
  class UserOption:
      def __init__(self, name, description, choices, yielding):
          super().__init__()
          self.name = name
          self.choices = choices
          self.description = description
          if yielding is None:
              yielding = default_yielding
          if not isinstance(yielding, bool):
              raise MesonException('Value of "yielding" must be a boolean.')
          self.yielding = yielding
  
      # Check that the input is a valid value and return the
      # "cleaned" or "native" version. For example the Boolean
      # option could take the string "true" and return True.
      def validate_value(self, value):
          raise RuntimeError('Derived option class did not override validate_value.')
  
  class UserStringOption(UserOption):
      def __init__(self, name, description, value, choices=None, yielding=None):
          super().__init__(name, description, choices, yielding)
          self.set_value(value)
  
      def validate(self, value):
          if not isinstance(value, str):
              raise MesonException('Value "%s" for string option "%s" is not a string.' % (str(value), self.name))
  
      def set_value(self, newvalue):
          self.validate(newvalue)
          self.value = newvalue
  
      def validate_value(self, value):
          self.validate(value)
          return value
  
  class UserBooleanOption(UserOption):
      def __init__(self, name, description, value, yielding=None):
          super().__init__(name, description, [True, False], yielding)
          self.set_value(value)
  
      def tobool(self, thing):
          if isinstance(thing, bool):
              return thing
          if thing.lower() == 'true':
              return True
          if thing.lower() == 'false':
              return False
          raise MesonException('Value %s is not boolean (true or false).' % thing)
  
      def set_value(self, newvalue):
          self.value = self.tobool(newvalue)
  
      def __bool__(self):
          return self.value
  
      def validate_value(self, value):
          return self.tobool(value)
  
  class UserIntegerOption(UserOption):
      def __init__(self, name, description, min_value, max_value, value, yielding=None):
          super().__init__(name, description, [True, False], yielding)
          self.min_value = min_value
          self.max_value = max_value
          self.set_value(value)
          c = []
          if min_value is not None:
              c.append('>=' + str(min_value))
          if max_value is not None:
              c.append('<=' + str(max_value))
          self.choices = ', '.join(c)
  
      def set_value(self, newvalue):
          if isinstance(newvalue, str):
              newvalue = self.toint(newvalue)
          if not isinstance(newvalue, int):
              raise MesonException('New value for integer option is not an integer.')
          if self.min_value is not None and newvalue < self.min_value:
              raise MesonException('New value %d is less than minimum value %d.' % (newvalue, self.min_value))
          if self.max_value is not None and newvalue > self.max_value:
              raise MesonException('New value %d is more than maximum value %d.' % (newvalue, self.max_value))
          self.value = newvalue
  
      def toint(self, valuestring):
          try:
              return int(valuestring)
          except:
              raise MesonException('Value string "%s" is not convertable to an integer.' % valuestring)
  
      def validate_value(self, value):
          return self.toint(value)
  
  class UserComboOption(UserOption):
      def __init__(self, name, description, choices, value, yielding=None):
          super().__init__(name, description, choices, yielding)
          if not isinstance(self.choices, list):
              raise MesonException('Combo choices must be an array.')
          for i in self.choices:
              if not isinstance(i, str):
                  raise MesonException('Combo choice elements must be strings.')
          self.set_value(value)
  
      def set_value(self, newvalue):
          if newvalue not in self.choices:
              optionsstring = ', '.join(['"%s"' % (item,) for item in self.choices])
              raise MesonException('Value "%s" for combo option "%s" is not one of the choices. Possible choices are: %s.' % (newvalue, self.name, optionsstring))
          self.value = newvalue
  
      def validate_value(self, value):
          if value not in self.choices:
              raise MesonException('Value %s not one of accepted values.' % value)
          return value
  
  class UserArrayOption(UserOption):
      def __init__(self, name, description, value, **kwargs):
          super().__init__(name, description, kwargs.get('choices', []), yielding=kwargs.get('yielding', None))
          self.set_value(value, user_input=False)
  
      def validate(self, value, user_input):
          # User input is for options defined on the command line (via -D
          # options). Users can put their input in as a comma separated
          # string, but for defining options in meson_options.txt the format
          # should match that of a combo
          if not user_input:
              if isinstance(value, str):
                  if not value.startswith('['):
                      raise MesonException('Valuestring does not define an array: ' + value)
                  newvalue = ast.literal_eval(value)
              else:
                  newvalue = value
          else:
              assert isinstance(value, str)
              if value.startswith('['):
                  newvalue = ast.literal_eval(value)
              else:
                  newvalue = [v.strip() for v in value.split(',')]
                  if len(set(newvalue)) != len(newvalue):
                      mlog.log(mlog.red('DEPRECATION:'), '''Duplicated values in an array type is deprecated.
  This will become a hard error in the future.''')
          if not isinstance(newvalue, list):
              raise MesonException('"{0}" should be a string array, but it is not'.format(str(newvalue)))
          for i in newvalue:
              if not isinstance(i, str):
                  raise MesonException('String array element "{0}" is not a string.'.format(str(newvalue)))
          if self.choices:
              bad = [x for x in newvalue if x not in self.choices]
              if bad:
                  raise MesonException('Options "{}" are not in allowed choices: "{}"'.format(
                      ', '.join(bad), ', '.join(self.choices)))
          return newvalue
  
      def set_value(self, newvalue, user_input=True):
          self.value = self.validate(newvalue, user_input)
  
      def validate_value(self, value):
          self.validate(value)
          return value
  
  # This class contains all data that must persist over multiple
  # invocations of Meson. It is roughly the same thing as
  # cmakecache.
  
  class CoreData:
  
      def __init__(self, options):
          self.guid = str(uuid.uuid4()).upper()
          self.test_guid = str(uuid.uuid4()).upper()
          self.regen_guid = str(uuid.uuid4()).upper()
          self.target_guids = {}
          self.version = version
          self.init_builtins(options)
          self.init_backend_options(self.builtins['backend'].value)
          self.user_options = {}
          self.compiler_options = {}
          self.base_options = {}
          # These external_*args, are set via env vars CFLAGS, LDFLAGS, etc
          # but only when not cross-compiling.
          self.external_preprocess_args = {} # CPPFLAGS only
          self.external_args = {} # CPPFLAGS + CFLAGS
          self.external_link_args = {} # CFLAGS + LDFLAGS (with MSVC: only LDFLAGS)
          self.cross_file = self.__load_cross_file(options.cross_file)
          self.wrap_mode = options.wrap_mode
          self.compilers = OrderedDict()
          self.cross_compilers = OrderedDict()
          self.deps = OrderedDict()
          self.modules = {}
          # Only to print a warning if it changes between Meson invocations.
          self.pkgconf_envvar = os.environ.get('PKG_CONFIG_PATH', '')
  
      @staticmethod
      def __load_cross_file(filename):
          """Try to load the cross file.
  
          If the filename is None return None. If the filename is an absolute
          (after resolving variables and ~), return that absolute path. Next,
          check if the file is relative to the current source dir. If the path
          still isn't resolved do the following:
              Linux + BSD:
                  - $XDG_DATA_HOME/meson/cross (or ~/.local/share/meson/cross if
                    undefined)
                  - $XDG_DATA_DIRS/meson/cross (or
                    /usr/local/share/meson/cross:/usr/share/meson/cross if undefined)
                  - Error
              *:
                  - Error
          BSD follows the Linux path and will honor XDG_* if set. This simplifies
          the implementation somewhat, especially since most BSD users wont set
          those environment variables.
          """
          if filename is None:
              return None
          filename = os.path.expanduser(os.path.expandvars(filename))
          if os.path.isabs(filename):
              return filename
          path_to_try = os.path.abspath(filename)
          if os.path.exists(path_to_try):
              return path_to_try
          if sys.platform == 'linux' or 'bsd' in sys.platform.lower():
              paths = [
                  os.environ.get('XDG_DATA_HOME', os.path.expanduser('~/.local/share')),
              ] + os.environ.get('XDG_DATA_DIRS', '/usr/local/share:/usr/share').split(':')
              for path in paths:
                  path_to_try = os.path.join(path, 'meson', 'cross', filename)
                  if os.path.exists(path_to_try):
                      return path_to_try
              raise MesonException('Cannot find specified cross file: ' + filename)
  
          raise MesonException('Cannot find specified cross file: ' + filename)
  
      def sanitize_prefix(self, prefix):
          if not os.path.isabs(prefix):
              raise MesonException('prefix value {!r} must be an absolute path'
                                   ''.format(prefix))
          if prefix.endswith('/') or prefix.endswith('\\'):
              # On Windows we need to preserve the trailing slash if the
              # string is of type 'C:\' because 'C:' is not an absolute path.
              if len(prefix) == 3 and prefix[1] == ':':
                  pass
              # If prefix is a single character, preserve it since it is
              # the root directory.
              elif len(prefix) == 1:
                  pass
              else:
                  prefix = prefix[:-1]
          return prefix
  
      def sanitize_dir_option_value(self, prefix, option, value):
          '''
          If the option is an installation directory option and the value is an
          absolute path, check that it resides within prefix and return the value
          as a path relative to the prefix.
  
          This way everyone can do f.ex, get_option('libdir') and be sure to get
          the library directory relative to prefix.
          '''
          if option.endswith('dir') and os.path.isabs(value) and \
             option not in builtin_dir_noprefix_options:
              # Value must be a subdir of the prefix
              # commonpath will always return a path in the native format, so we
              # must use pathlib.PurePath to do the same conversion before
              # comparing.
              if os.path.commonpath([value, prefix]) != str(PurePath(prefix)):
                  m = 'The value of the {!r} option is {!r} which must be a ' \
                      'subdir of the prefix {!r}.\nNote that if you pass a ' \
                      'relative path, it is assumed to be a subdir of prefix.'
                  raise MesonException(m.format(option, value, prefix))
              # Convert path to be relative to prefix
              skip = len(prefix) + 1
              value = value[skip:]
          return value
  
      def init_builtins(self, options):
          self.builtins = {}
          # Sanitize prefix
          options.prefix = self.sanitize_prefix(options.prefix)
          # Initialize other builtin options
          for key in get_builtin_options():
              if hasattr(options, key):
                  value = getattr(options, key)
                  value = self.sanitize_dir_option_value(options.prefix, key, value)
                  setattr(options, key, value)
              else:
                  value = get_builtin_option_default(key, prefix=options.prefix)
              args = [key] + builtin_options[key][1:-1] + [value]
              self.builtins[key] = builtin_options[key][0](*args)
  
      def init_backend_options(self, backend_name):
          self.backend_options = {}
          if backend_name == 'ninja':
              self.backend_options['backend_max_links'] = UserIntegerOption('backend_max_links',
                                                                            'Maximum number of linker processes to run or 0 for no limit',
                                                                            0, None, 0)
  
      def get_builtin_option(self, optname):
          if optname in self.builtins:
              return self.builtins[optname].value
          raise RuntimeError('Tried to get unknown builtin option %s.' % optname)
  
      def set_builtin_option(self, optname, value):
          if optname == 'prefix':
              value = self.sanitize_prefix(value)
          elif optname in self.builtins:
              prefix = self.builtins['prefix'].value
              value = self.sanitize_dir_option_value(prefix, optname, value)
          else:
              raise RuntimeError('Tried to set unknown builtin option %s.' % optname)
          self.builtins[optname].set_value(value)
  
      def validate_option_value(self, option_name, override_value):
          for opts in (self.builtins, self.base_options, self.compiler_options, self.user_options):
              if option_name in opts:
                  opt = opts[option_name]
                  return opt.validate_value(override_value)
          raise MesonException('Tried to validate unknown option %s.' % option_name)
  
  def load(filename):
      load_fail_msg = 'Coredata file {!r} is corrupted. Try with a fresh build tree.'.format(filename)
      try:
          with open(filename, 'rb') as f:
              obj = pickle.load(f)
      except pickle.UnpicklingError:
          raise MesonException(load_fail_msg)
      if not isinstance(obj, CoreData):
          raise MesonException(load_fail_msg)
      if obj.version != version:
          raise MesonException('Build directory has been generated with Meson version %s, which is incompatible with current version %s.\nPlease delete this build directory AND create a new one.' %
                               (obj.version, version))
      return obj
  
  def save(obj, filename):
      if obj.version != version:
          raise MesonException('Fatal version mismatch corruption.')
      with open(filename, 'wb') as f:
          pickle.dump(obj, f)
  
  def get_builtin_options():
      return list(builtin_options.keys())
  
  def is_builtin_option(optname):
      return optname in get_builtin_options()
  
  def get_builtin_option_choices(optname):
      if is_builtin_option(optname):
          if builtin_options[optname][0] == UserStringOption:
              return None
          elif builtin_options[optname][0] == UserBooleanOption:
              return [True, False]
          else:
              return builtin_options[optname][2]
      else:
          raise RuntimeError('Tried to get the supported values for an unknown builtin option \'%s\'.' % optname)
  
  def get_builtin_option_description(optname):
      if is_builtin_option(optname):
          return builtin_options[optname][1]
      else:
          raise RuntimeError('Tried to get the description for an unknown builtin option \'%s\'.' % optname)
  
  def get_builtin_option_default(optname, prefix='', noneIfSuppress=False):
      if is_builtin_option(optname):
          o = builtin_options[optname]
          if o[0] == UserComboOption:
              return o[3]
          if optname in builtin_dir_noprefix_options:
              if noneIfSuppress:
                  # Return None if argparse defaulting should be suppressed for
                  # this option (so we can determine the default later based on
                  # prefix)
                  return None
              elif prefix in builtin_dir_noprefix_options[optname]:
                  return builtin_dir_noprefix_options[optname][prefix]
          return o[2]
      else:
          raise RuntimeError('Tried to get the default value for an unknown builtin option \'%s\'.' % optname)
  
  builtin_options = {
      'buildtype':  [UserComboOption, 'Build type to use.', ['plain', 'debug', 'debugoptimized', 'release', 'minsize'], 'debug'],
      'strip':      [UserBooleanOption, 'Strip targets on install.', False],
      'unity':      [UserComboOption, 'Unity build.', ['on', 'off', 'subprojects'], 'off'],
      'prefix':     [UserStringOption, 'Installation prefix.', default_prefix()],
      'libdir':     [UserStringOption, 'Library directory.', default_libdir()],
      'libexecdir': [UserStringOption, 'Library executable directory.', default_libexecdir()],
      'bindir':     [UserStringOption, 'Executable directory.', 'bin'],
      'sbindir':    [UserStringOption, 'System executable directory.', 'sbin'],
      'includedir': [UserStringOption, 'Header file directory.', 'include'],
      'datadir':    [UserStringOption, 'Data file directory.', 'share'],
      'mandir':     [UserStringOption, 'Manual page directory.', 'share/man'],
      'infodir':    [UserStringOption, 'Info page directory.', 'share/info'],
      'localedir':  [UserStringOption, 'Locale data directory.', 'share/locale'],
      'sysconfdir':      [UserStringOption, 'Sysconf data directory.', 'etc'],
      'localstatedir':   [UserStringOption, 'Localstate data directory.', 'var'],
      'sharedstatedir':  [UserStringOption, 'Architecture-independent data directory.', 'com'],
      'werror':          [UserBooleanOption, 'Treat warnings as errors.', False],
      'warning_level':   [UserComboOption, 'Compiler warning level to use.', ['1', '2', '3'], '1'],
      'layout':          [UserComboOption, 'Build directory layout.', ['mirror', 'flat'], 'mirror'],
      'default_library': [UserComboOption, 'Default library type.', ['shared', 'static'], 'shared'],
      'backend':         [UserComboOption, 'Backend to use.', backendlist, 'ninja'],
      'stdsplit':        [UserBooleanOption, 'Split stdout and stderr in test logs.', True],
      'errorlogs':       [UserBooleanOption, "Whether to print the logs from failing tests.", True],
  }
  
  # Special prefix-dependent defaults for installation directories that reside in
  # a path outside of the prefix in FHS and common usage.
  builtin_dir_noprefix_options = {
      'sysconfdir':     {'/usr': '/etc'},
      'localstatedir':  {'/usr': '/var',     '/usr/local': '/var/local'},
      'sharedstatedir': {'/usr': '/var/lib', '/usr/local': '/var/local/lib'},
  }
  
  forbidden_target_names = {'clean': None,
                            'clean-ctlist': None,
                            'clean-gcno': None,
                            'clean-gcda': None,
                            'coverage': None,
                            'coverage-text': None,
                            'coverage-xml': None,
                            'coverage-html': None,
                            'phony': None,
                            'PHONY': None,
                            'all': None,
                            'test': None,
                            'benchmark': None,
                            'install': None,
                            'uninstall': None,
                            'build.ninja': None,
                            'scan-build': None,
                            'reconfigure': None,
                            'dist': None,
                            'distcheck': None,
                            }
  
  
  [... the rest is omitted ...]
files: mesonbuild/coredata.py
files: #!/usr/bin/env python3
  # Copyright 2016-2017 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import stat
  import shlex
  import subprocess
  import re, json
  import tempfile
  import textwrap
  import os
  import shutil
  import sys
  import unittest
  from unittest import mock
  from configparser import ConfigParser
  from glob import glob
  from pathlib import PurePath
  
  import mesonbuild.mlog
  import mesonbuild.compilers
  import mesonbuild.environment
  import mesonbuild.mesonlib
  import mesonbuild.coredata
  import mesonbuild.modules.gnome
  from mesonbuild.interpreter import ObjectHolder
  from mesonbuild.mesonlib import (
      is_linux, is_windows, is_osx, is_cygwin, is_dragonflybsd,
      windows_proof_rmtree, python_command, meson_command, version_compare,
  )
  from mesonbuild.environment import Environment, detect_ninja
  from mesonbuild.mesonlib import MesonException, EnvironmentException
  from mesonbuild.dependencies import PkgConfigDependency, ExternalProgram
  
  from run_tests import exe_suffix, get_fake_options
  from run_tests import get_builddir_target_args, get_backend_commands, Backend
  from run_tests import ensure_backend_detects_changes, run_configure, meson_exe
  from run_tests import should_run_linux_cross_tests
  
  
  def get_dynamic_section_entry(fname, entry):
      try:
          raw_out = subprocess.check_output(['readelf', '-d', fname],
                                            universal_newlines=True)
      except FileNotFoundError:
          # FIXME: Try using depfixer.py:Elf() as a fallback
          raise unittest.SkipTest('readelf not found')
      pattern = re.compile(entry + r': \[(.*?)\]')
      for line in raw_out.split('\n'):
          m = pattern.search(line)
          if m is not None:
              return m.group(1)
      return None # The file did not contain the specified entry.
  
  def get_soname(fname):
      return get_dynamic_section_entry(fname, 'soname')
  
  def get_rpath(fname):
      return get_dynamic_section_entry(fname, r'(?:rpath|runpath)')
  
  class InternalTests(unittest.TestCase):
  
      def test_version_number(self):
          searchfunc = mesonbuild.environment.search_version
          self.assertEqual(searchfunc('foobar 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('foobar 2016.10.28 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('2016.10.28 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('foobar 2016.10.128'), 'unknown version')
          self.assertEqual(searchfunc('2016.10.128'), 'unknown version')
  
      def test_mode_symbolic_to_bits(self):
          modefunc = mesonbuild.mesonlib.FileMode.perms_s_to_bits
          self.assertEqual(modefunc('---------'), 0)
          self.assertEqual(modefunc('r--------'), stat.S_IRUSR)
          self.assertEqual(modefunc('---r-----'), stat.S_IRGRP)
          self.assertEqual(modefunc('------r--'), stat.S_IROTH)
          self.assertEqual(modefunc('-w-------'), stat.S_IWUSR)
          self.assertEqual(modefunc('----w----'), stat.S_IWGRP)
          self.assertEqual(modefunc('-------w-'), stat.S_IWOTH)
          self.assertEqual(modefunc('--x------'), stat.S_IXUSR)
          self.assertEqual(modefunc('-----x---'), stat.S_IXGRP)
          self.assertEqual(modefunc('--------x'), stat.S_IXOTH)
          self.assertEqual(modefunc('--S------'), stat.S_ISUID)
          self.assertEqual(modefunc('-----S---'), stat.S_ISGID)
          self.assertEqual(modefunc('--------T'), stat.S_ISVTX)
          self.assertEqual(modefunc('--s------'), stat.S_ISUID | stat.S_IXUSR)
          self.assertEqual(modefunc('-----s---'), stat.S_ISGID | stat.S_IXGRP)
          self.assertEqual(modefunc('--------t'), stat.S_ISVTX | stat.S_IXOTH)
          self.assertEqual(modefunc('rwx------'), stat.S_IRWXU)
          self.assertEqual(modefunc('---rwx---'), stat.S_IRWXG)
          self.assertEqual(modefunc('------rwx'), stat.S_IRWXO)
          # We could keep listing combinations exhaustively but that seems
          # tedious and pointless. Just test a few more.
          self.assertEqual(modefunc('rwxr-xr-x'),
                           stat.S_IRWXU |
                           stat.S_IRGRP | stat.S_IXGRP |
                           stat.S_IROTH | stat.S_IXOTH)
          self.assertEqual(modefunc('rw-r--r--'),
                           stat.S_IRUSR | stat.S_IWUSR |
                           stat.S_IRGRP |
                           stat.S_IROTH)
          self.assertEqual(modefunc('rwsr-x---'),
                           stat.S_IRWXU | stat.S_ISUID |
                           stat.S_IRGRP | stat.S_IXGRP)
  
      def test_compiler_args_class(self):
          cargsfunc = mesonbuild.compilers.CompilerArgs
          c = mesonbuild.compilers.CCompiler([], 'fake', False)
          # Test that bad initialization fails
          self.assertRaises(TypeError, cargsfunc, [])
          self.assertRaises(TypeError, cargsfunc, [], [])
          self.assertRaises(TypeError, cargsfunc, c, [], [])
          # Test that empty initialization works
          a = cargsfunc(c)
          self.assertEqual(a, [])
          # Test that list initialization works
          a = cargsfunc(['-I.', '-I..'], c)
          self.assertEqual(a, ['-I.', '-I..'])
          # Test that there is no de-dup on initialization
          self.assertEqual(cargsfunc(['-I.', '-I.'], c), ['-I.', '-I.'])
  
          ## Test that appending works
          a.append('-I..')
          self.assertEqual(a, ['-I..', '-I.'])
          a.append('-O3')
          self.assertEqual(a, ['-I..', '-I.', '-O3'])
  
          ## Test that in-place addition works
          a += ['-O2', '-O2']
          self.assertEqual(a, ['-I..', '-I.', '-O3', '-O2', '-O2'])
          # Test that removal works
          a.remove('-O2')
          self.assertEqual(a, ['-I..', '-I.', '-O3', '-O2'])
          # Test that de-dup happens on addition
          a += ['-Ifoo', '-Ifoo']
          self.assertEqual(a, ['-Ifoo', '-I..', '-I.', '-O3', '-O2'])
  
          # .extend() is just +=, so we don't test it
  
          ## Test that addition works
          # Test that adding a list with just one old arg works and yields the same array
          a = a + ['-Ifoo']
          self.assertEqual(a, ['-Ifoo', '-I..', '-I.', '-O3', '-O2'])
          # Test that adding a list with one arg new and one old works
          a = a + ['-Ifoo', '-Ibaz']
          self.assertEqual(a, ['-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2'])
          # Test that adding args that must be prepended and appended works
          a = a + ['-Ibar', '-Wall']
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2', '-Wall'])
  
          ## Test that reflected addition works
          # Test that adding to a list with just one old arg works and yields the same array
          a = ['-Ifoo'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with just one new arg that is not pre-pended works
          a = ['-Werror'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Werror', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with two new args preserves the order
          a = ['-Ldir', '-Lbah'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Ldir', '-Lbah', '-Werror', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with old args does nothing
          a = ['-Ibar', '-Ibaz', '-Ifoo'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Ldir', '-Lbah', '-Werror', '-O3', '-O2', '-Wall'])
  
          ## Test that adding libraries works
          l = cargsfunc(c, ['-Lfoodir', '-lfoo'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo'])
          # Adding a library and a libpath appends both correctly
          l += ['-Lbardir', '-lbar']
          self.assertEqual(l, ['-Lbardir', '-Lfoodir', '-lfoo', '-lbar'])
          # Adding the same library again does nothing
          l += ['-lbar']
          self.assertEqual(l, ['-Lbardir', '-Lfoodir', '-lfoo', '-lbar'])
  
          ## Test that 'direct' append and extend works
          l = cargsfunc(c, ['-Lfoodir', '-lfoo'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo'])
          # Direct-adding a library and a libpath appends both correctly
          l.extend_direct(['-Lbardir', '-lbar'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo', '-Lbardir', '-lbar'])
          # Direct-adding the same library again still adds it
          l.append_direct('-lbar')
          self.assertEqual(l, ['-Lfoodir', '-lfoo', '-Lbardir', '-lbar', '-lbar'])
  
      def test_string_templates_substitution(self):
          dictfunc = mesonbuild.mesonlib.get_filenames_templates_dict
          substfunc = mesonbuild.mesonlib.substitute_values
          ME = mesonbuild.mesonlib.MesonException
  
          # Identity
          self.assertEqual(dictfunc([], []), {})
  
          # One input, no outputs
          inputs = ['bar/foo.c.in']
          outputs = []
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out'] + cmd[1:])
          cmd = ['@INPUT0@.out', '@PLAINNAME@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out'] + [d['@PLAINNAME@'] + '.ok'] + cmd[2:])
          cmd = ['@INPUT@', '@BASENAME@.hah', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           inputs + [d['@BASENAME@'] + '.hah'] + cmd[2:])
          cmd = ['@OUTPUT@']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # One input, one output
          inputs = ['bar/foo.c.in']
          outputs = ['out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c',
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': '.'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@.out', '@OUTPUT@', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out'] + outputs + cmd[2:])
          cmd = ['@INPUT0@.out', '@PLAINNAME@.ok', '@OUTPUT0@']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out', d['@PLAINNAME@'] + '.ok'] + outputs)
          cmd = ['@INPUT@', '@BASENAME@.hah', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           inputs + [d['@BASENAME@'] + '.hah'] + cmd[2:])
  
          # One input, one output with a subdir
          outputs = ['dir/out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c',
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
  
          # Two inputs, no outputs
          inputs = ['bar/foo.c.in', 'baz/foo.c.in']
          outputs = []
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1]}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), inputs + cmd[1:])
          cmd = ['@INPUT0@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out'] + cmd[1:])
          cmd = ['@INPUT0@.out', '@INPUT1@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out', inputs[1] + '.ok'] + cmd[2:])
          cmd = ['@INPUT0@', '@INPUT1@', 'strings']
          self.assertEqual(substfunc(cmd, d), inputs + cmd[2:])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Too many inputs
          cmd = ['@PLAINNAME@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@BASENAME@']
          self.assertRaises(ME, substfunc, cmd, d)
          # No outputs
          cmd = ['@OUTPUT@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@OUTPUT0@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@OUTDIR@']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # Two inputs, one output
          outputs = ['dir/out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1],
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@OUTPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[1:])
          cmd = ['@OUTPUT@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out'] + cmd[1:])
          cmd = ['@OUTPUT0@.out', '@INPUT1@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out', inputs[1] + '.ok'] + cmd[2:])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough outputs
          cmd = ['@OUTPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # Two inputs, two outputs
          outputs = ['dir/out.c', 'dir/out2.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1],
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTPUT1@': outputs[1],
               '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@OUTPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[1:])
          cmd = ['@OUTPUT0@', '@OUTPUT1@', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[2:])
          cmd = ['@OUTPUT0@.out', '@INPUT1@.ok', '@OUTDIR@']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out', inputs[1] + '.ok', 'dir'])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough outputs
          cmd = ['@OUTPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Many outputs, can't use @OUTPUT@ like this
          cmd = ['@OUTPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
  
      def test_needs_exe_wrapper_override(self):
          config = ConfigParser()
          config['binaries'] = {
              'c': '\'/usr/bin/gcc\'',
          }
          config['host_machine'] = {
              'system': '\'linux\'',
              'cpu_family': '\'arm\'',
              'cpu': '\'armv7\'',
              'endian': '\'little\'',
          }
          # Can not be used as context manager because we need to
          # open it a second time and this is not possible on
          # Windows.
          configfile = tempfile.NamedTemporaryFile(mode='w+', delete=False)
          configfilename = configfile.name
          config.write(configfile)
          configfile.flush()
          configfile.close()
          detected_value = mesonbuild.environment.CrossBuildInfo(configfile.name).need_exe_wrapper()
          os.unlink(configfilename)
  
          desired_value = not detected_value
          config['properties'] = {
              'needs_exe_wrapper': 'true' if desired_value else 'false'
          }
  
          configfile = tempfile.NamedTemporaryFile(mode='w+', delete=False)
          configfilename = configfile.name
          config.write(configfile)
          configfile.close()
          forced_value = mesonbuild.environment.CrossBuildInfo(configfile.name).need_exe_wrapper()
          os.unlink(configfilename)
  
          self.assertEqual(forced_value, desired_value)
  
      def test_listify(self):
          listify = mesonbuild.mesonlib.listify
          # Test sanity
          self.assertEqual([1], listify(1))
          self.assertEqual([], listify([]))
          self.assertEqual([1], listify([1]))
          # Test flattening
          self.assertEqual([1, 2, 3], listify([1, [2, 3]]))
          self.assertEqual([1, 2, 3], listify([1, [2, [3]]]))
          self.assertEqual([1, [2, [3]]], listify([1, [2, [3]]], flatten=False))
          # Test flattening and unholdering
          holder1 = ObjectHolder(1)
          holder3 = ObjectHolder(3)
          self.assertEqual([holder1], listify(holder1))
          self.assertEqual([holder1], listify([holder1]))
          self.assertEqual([holder1, 2], listify([holder1, 2]))
          self.assertEqual([holder1, 2, 3], listify([holder1, 2, [3]]))
          self.assertEqual([1], listify(holder1, unholder=True))
          self.assertEqual([1], listify([holder1], unholder=True))
          self.assertEqual([1, 2], listify([holder1, 2], unholder=True))
          self.assertEqual([1, 2, 3], listify([holder1, 2, [holder3]], unholder=True))
          # Unholding doesn't work recursively when not flattening
          self.assertEqual([1, [2], [holder3]], listify([holder1, [2], [holder3]], unholder=True, flatten=False))
  
      def test_extract_as_list(self):
          extract = mesonbuild.mesonlib.extract_as_list
          # Test sanity
          kwargs = {'sources': [1, 2, 3]}
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources'))
          self.assertEqual(kwargs, {'sources': [1, 2, 3]})
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', pop=True))
          self.assertEqual(kwargs, {})
          # Test unholding
          holder3 = ObjectHolder(3)
          kwargs = {'sources': [1, 2, holder3]}
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', unholder=True))
          self.assertEqual(kwargs, {'sources': [1, 2, holder3]})
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', unholder=True, pop=True))
          self.assertEqual(kwargs, {})
          # Test listification
          kwargs = {'sources': [1, 2, 3], 'pch_sources': [4, 5, 6]}
          self.assertEqual([[1, 2, 3], [4, 5, 6]], extract(kwargs, 'sources', 'pch_sources'))
  
  
  class BasePlatformTests(unittest.TestCase):
      def setUp(self):
          super().setUp()
          src_root = os.path.dirname(__file__)
          src_root = os.path.join(os.getcwd(), src_root)
          self.src_root = src_root
          self.prefix = '/usr'
          self.libdir = os.path.join(self.prefix, 'lib')
          # Get the backend
          # FIXME: Extract this from argv?
          self.backend = getattr(Backend, os.environ.get('MESON_UNIT_TEST_BACKEND', 'ninja'))
          self.meson_mainfile = os.path.join(src_root, 'meson.py')
          self.meson_args = ['--backend=' + self.backend.name]
          self.meson_command = meson_command + self.meson_args
          self.mconf_command = meson_command + ['configure']
          self.mintro_command = meson_command + ['introspect']
          self.wrap_command = meson_command + ['wrap']
          # Backend-specific build commands
          self.build_command, self.clean_command, self.test_command, self.install_command, \
              self.uninstall_command = get_backend_commands(self.backend)
          # Test directories
          self.common_test_dir = os.path.join(src_root, 'test cases/common')
          self.vala_test_dir = os.path.join(src_root, 'test cases/vala')
          self.framework_test_dir = os.path.join(src_root, 'test cases/frameworks')
          self.unit_test_dir = os.path.join(src_root, 'test cases/unit')
          # Misc stuff
          self.orig_env = os.environ.copy()
          if self.backend is Backend.ninja:
              self.no_rebuild_stdout = 'ninja: no work to do.'
          else:
              # VS doesn't have a stable output when no changes are done
              # XCode backend is untested with unit tests, help welcome!
              self.no_rebuild_stdout = 'UNKNOWN BACKEND {!r}'.format(self.backend.name)
  
          self.builddirs = []
          self.new_builddir()
  
      def change_builddir(self, newdir):
          self.builddir = newdir
          self.privatedir = os.path.join(self.builddir, 'meson-private')
          self.logdir = os.path.join(self.builddir, 'meson-logs')
          self.installdir = os.path.join(self.builddir, 'install')
          self.distdir = os.path.join(self.builddir, 'meson-dist')
          self.mtest_command = meson_command + ['test', '-C', self.builddir]
          self.builddirs.append(self.builddir)
  
      def new_builddir(self):
          # In case the directory is inside a symlinked directory, find the real
          # path otherwise we might not find the srcdir from inside the builddir.
          newdir = os.path.realpath(tempfile.mkdtemp())
          self.change_builddir(newdir)
  
      def _print_meson_log(self):
          log = os.path.join(self.logdir, 'meson-log.txt')
          if not os.path.isfile(log):
              print("{!r} doesn't exist".format(log))
              return
          with open(log, 'r', encoding='utf-8') as f:
              print(f.read())
  
      def tearDown(self):
          for path in self.builddirs:
              try:
                  windows_proof_rmtree(path)
              except FileNotFoundError:
                  pass
          os.environ = self.orig_env
          super().tearDown()
  
      def _run(self, command, workdir=None):
          '''
          Run a command while printing the stdout and stderr to stdout,
          and also return a copy of it
          '''
          p = subprocess.Popen(command, stdout=subprocess.PIPE,
                               stderr=subprocess.STDOUT, env=os.environ.copy(),
                               universal_newlines=True, cwd=workdir)
          output = p.communicate()[0]
          print(output)
          if p.returncode != 0:
              if 'MESON_SKIP_TEST' in output:
                  raise unittest.SkipTest('Project requested skipping.')
              raise subprocess.CalledProcessError(p.returncode, command)
          return output
  
      def init(self, srcdir, extra_args=None, default_args=True, inprocess=False):
          self.assertPathExists(srcdir)
          if extra_args is None:
              extra_args = []
          if not isinstance(extra_args, list):
              extra_args = [extra_args]
          args = [srcdir, self.builddir]
          if default_args:
              args += ['--prefix', self.prefix,
                       '--libdir', self.libdir]
          self.privatedir = os.path.join(self.builddir, 'meson-private')
          if inprocess:
              try:
                  (returncode, out, _) = run_configure(self.meson_mainfile, self.meson_args + args + extra_args)
                  if returncode != 0:
                      self._print_meson_log()
                      raise RuntimeError('Configure failed')
              except:
                  self._print_meson_log()
                  raise
              finally:
                  # Close log file to satisfy Windows file locking
                  mesonbuild.mlog.shutdown()
                  mesonbuild.mlog.log_dir = None
                  mesonbuild.mlog.log_file = None
          else:
              try:
                  out = self._run(self.meson_command + args + extra_args)
              except unittest.SkipTest:
                  raise unittest.SkipTest('Project requested skipping: ' + srcdir)
              except:
                  self._print_meson_log()
                  raise
          return out
  
      def build(self, target=None, extra_args=None):
          if extra_args is None:
              extra_args = []
          # Add arguments for building the target (if specified),
          # and using the build dir (if required, with VS)
          args = get_builddir_target_args(self.backend, self.builddir, target)
          return self._run(self.build_command + args + extra_args, workdir=self.builddir)
  
      def clean(self):
          dir_args = get_builddir_target_args(self.backend, self.builddir, None)
          self._run(self.clean_command + dir_args, workdir=self.builddir)
  
      def run_tests(self):
          self._run(self.test_command, workdir=self.builddir)
  
      def install(self):
          if self.backend is not Backend.ninja:
              raise unittest.SkipTest('{!r} backend can\'t install files'.format(self.backend.name))
          os.environ['DESTDIR'] = self.installdir
          self._run(self.install_command, workdir=self.builddir)
  
      def uninstall(self):
          self._run(self.uninstall_command, workdir=self.builddir)
  
      def run_target(self, target):
          '''
          Run a Ninja target while printing the stdout and stderr to stdout,
          and also return a copy of it
          '''
          return self.build(target=target)
  
      def setconf(self, arg, will_build=True):
          if will_build:
              ensure_backend_detects_changes(self.backend)
          self._run(self.mconf_command + [arg, self.builddir])
  
      def wipe(self):
          windows_proof_rmtree(self.builddir)
  
      def utime(self, f):
          ensure_backend_detects_changes(self.backend)
          os.utime(f)
  
      def get_compdb(self):
          if self.backend is not Backend.ninja:
              raise unittest.SkipTest('Compiler db not available with {} backend'.format(self.backend.name))
          with open(os.path.join(self.builddir, 'compile_commands.json')) as ifile:
              contents = json.load(ifile)
          # If Ninja is using .rsp files, generate them, read their contents, and
          # replace it as the command for all compile commands in the parsed json.
          if len(contents) > 0 and contents[0]['command'].endswith('.rsp'):
              # Pretend to build so that the rsp files are generated
              self.build(extra_args=['-d', 'keeprsp', '-n'])
              for each in contents:
                  # Extract the actual command from the rsp file
                  compiler, rsp = each['command'].split(' @')
                  rsp = os.path.join(self.builddir, rsp)
                  # Replace the command with its contents
                  with open(rsp, 'r', encoding='utf-8') as f:
                      each['command'] = compiler + ' ' + f.read()
          return contents
  
      def get_meson_log(self):
          with open(os.path.join(self.builddir, 'meson-logs', 'meson-log.txt')) as f:
              return f.readlines()
  
      def get_meson_log_compiler_checks(self):
          '''
          Fetch a list command-lines run by meson for compiler checks.
          Each command-line is returned as a list of arguments.
          '''
          log = self.get_meson_log()
          prefix = 'Command line:'
          cmds = [l[len(prefix):].split() for l in log if l.startswith(prefix)]
          return cmds
  
      def introspect(self, arg):
          out = subprocess.check_output(self.mintro_command + [arg, self.builddir],
                                        universal_newlines=True)
          return json.loads(out)
  
      def assertPathEqual(self, path1, path2):
          '''
          Handles a lot of platform-specific quirks related to paths such as
          separator, case-sensitivity, etc.
          '''
          self.assertEqual(PurePath(path1), PurePath(path2))
  
      def assertPathBasenameEqual(self, path, basename):
          msg = '{!r} does not end with {!r}'.format(path, basename)
          # We cannot use os.path.basename because it returns '' when the path
          # ends with '/' for some silly reason. This is not how the UNIX utility
          # `basename` works.
          path_basename = PurePath(path).parts[-1]
          self.assertEqual(PurePath(path_basename), PurePath(basename), msg)
  
      def assertBuildIsNoop(self):
          ret = self.build()
          if self.backend is Backend.ninja:
              self.assertEqual(ret.split('\n')[-2], self.no_rebuild_stdout)
          elif self.backend is Backend.vs:
              # Ensure that some target said that no rebuild was done
              self.assertIn('CustomBuild:\n  All outputs are up-to-date.', ret)
              self.assertIn('ClCompile:\n  All outputs are up-to-date.', ret)
              self.assertIn('Link:\n  All outputs are up-to-date.', ret)
              # Ensure that no targets were built
              clre = re.compile('ClCompile:\n [^\n]*cl', flags=re.IGNORECASE)
              linkre = re.compile('Link:\n [^\n]*link', flags=re.IGNORECASE)
              self.assertNotRegex(ret, clre)
              self.assertNotRegex(ret, linkre)
          elif self.backend is Backend.xcode:
              raise unittest.SkipTest('Please help us fix this test on the xcode backend')
          else:
             
  
  [... the rest is omitted ...]
files: run_unittests.py
files: #!/usr/bin/env python3
  # Copyright 2016-2017 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import stat
  import shlex
  import subprocess
  import re, json
  import tempfile
  import textwrap
  import os
  import shutil
  import sys
  import unittest
  from unittest import mock
  from configparser import ConfigParser
  from glob import glob
  from pathlib import PurePath
  
  import mesonbuild.mlog
  import mesonbuild.compilers
  import mesonbuild.environment
  import mesonbuild.mesonlib
  import mesonbuild.coredata
  import mesonbuild.modules.gnome
  from mesonbuild.interpreter import ObjectHolder
  from mesonbuild.mesonlib import (
      is_linux, is_windows, is_osx, is_cygwin, is_dragonflybsd,
      windows_proof_rmtree, python_command, meson_command, version_compare,
  )
  from mesonbuild.environment import Environment, detect_ninja
  from mesonbuild.mesonlib import MesonException, EnvironmentException
  from mesonbuild.dependencies import PkgConfigDependency, ExternalProgram
  
  from run_tests import exe_suffix, get_fake_options
  from run_tests import get_builddir_target_args, get_backend_commands, Backend
  from run_tests import ensure_backend_detects_changes, run_configure, meson_exe
  from run_tests import should_run_linux_cross_tests
  
  
  def get_dynamic_section_entry(fname, entry):
      try:
          raw_out = subprocess.check_output(['readelf', '-d', fname],
                                            universal_newlines=True)
      except FileNotFoundError:
          # FIXME: Try using depfixer.py:Elf() as a fallback
          raise unittest.SkipTest('readelf not found')
      pattern = re.compile(entry + r': \[(.*?)\]')
      for line in raw_out.split('\n'):
          m = pattern.search(line)
          if m is not None:
              return m.group(1)
      return None # The file did not contain the specified entry.
  
  def get_soname(fname):
      return get_dynamic_section_entry(fname, 'soname')
  
  def get_rpath(fname):
      return get_dynamic_section_entry(fname, r'(?:rpath|runpath)')
  
  class InternalTests(unittest.TestCase):
  
      def test_version_number(self):
          searchfunc = mesonbuild.environment.search_version
          self.assertEqual(searchfunc('foobar 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('foobar 2016.10.28 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('2016.10.28 1.2.3'), '1.2.3')
          self.assertEqual(searchfunc('foobar 2016.10.128'), 'unknown version')
          self.assertEqual(searchfunc('2016.10.128'), 'unknown version')
  
      def test_mode_symbolic_to_bits(self):
          modefunc = mesonbuild.mesonlib.FileMode.perms_s_to_bits
          self.assertEqual(modefunc('---------'), 0)
          self.assertEqual(modefunc('r--------'), stat.S_IRUSR)
          self.assertEqual(modefunc('---r-----'), stat.S_IRGRP)
          self.assertEqual(modefunc('------r--'), stat.S_IROTH)
          self.assertEqual(modefunc('-w-------'), stat.S_IWUSR)
          self.assertEqual(modefunc('----w----'), stat.S_IWGRP)
          self.assertEqual(modefunc('-------w-'), stat.S_IWOTH)
          self.assertEqual(modefunc('--x------'), stat.S_IXUSR)
          self.assertEqual(modefunc('-----x---'), stat.S_IXGRP)
          self.assertEqual(modefunc('--------x'), stat.S_IXOTH)
          self.assertEqual(modefunc('--S------'), stat.S_ISUID)
          self.assertEqual(modefunc('-----S---'), stat.S_ISGID)
          self.assertEqual(modefunc('--------T'), stat.S_ISVTX)
          self.assertEqual(modefunc('--s------'), stat.S_ISUID | stat.S_IXUSR)
          self.assertEqual(modefunc('-----s---'), stat.S_ISGID | stat.S_IXGRP)
          self.assertEqual(modefunc('--------t'), stat.S_ISVTX | stat.S_IXOTH)
          self.assertEqual(modefunc('rwx------'), stat.S_IRWXU)
          self.assertEqual(modefunc('---rwx---'), stat.S_IRWXG)
          self.assertEqual(modefunc('------rwx'), stat.S_IRWXO)
          # We could keep listing combinations exhaustively but that seems
          # tedious and pointless. Just test a few more.
          self.assertEqual(modefunc('rwxr-xr-x'),
                           stat.S_IRWXU |
                           stat.S_IRGRP | stat.S_IXGRP |
                           stat.S_IROTH | stat.S_IXOTH)
          self.assertEqual(modefunc('rw-r--r--'),
                           stat.S_IRUSR | stat.S_IWUSR |
                           stat.S_IRGRP |
                           stat.S_IROTH)
          self.assertEqual(modefunc('rwsr-x---'),
                           stat.S_IRWXU | stat.S_ISUID |
                           stat.S_IRGRP | stat.S_IXGRP)
  
      def test_compiler_args_class(self):
          cargsfunc = mesonbuild.compilers.CompilerArgs
          c = mesonbuild.compilers.CCompiler([], 'fake', False)
          # Test that bad initialization fails
          self.assertRaises(TypeError, cargsfunc, [])
          self.assertRaises(TypeError, cargsfunc, [], [])
          self.assertRaises(TypeError, cargsfunc, c, [], [])
          # Test that empty initialization works
          a = cargsfunc(c)
          self.assertEqual(a, [])
          # Test that list initialization works
          a = cargsfunc(['-I.', '-I..'], c)
          self.assertEqual(a, ['-I.', '-I..'])
          # Test that there is no de-dup on initialization
          self.assertEqual(cargsfunc(['-I.', '-I.'], c), ['-I.', '-I.'])
  
          ## Test that appending works
          a.append('-I..')
          self.assertEqual(a, ['-I..', '-I.'])
          a.append('-O3')
          self.assertEqual(a, ['-I..', '-I.', '-O3'])
  
          ## Test that in-place addition works
          a += ['-O2', '-O2']
          self.assertEqual(a, ['-I..', '-I.', '-O3', '-O2', '-O2'])
          # Test that removal works
          a.remove('-O2')
          self.assertEqual(a, ['-I..', '-I.', '-O3', '-O2'])
          # Test that de-dup happens on addition
          a += ['-Ifoo', '-Ifoo']
          self.assertEqual(a, ['-Ifoo', '-I..', '-I.', '-O3', '-O2'])
  
          # .extend() is just +=, so we don't test it
  
          ## Test that addition works
          # Test that adding a list with just one old arg works and yields the same array
          a = a + ['-Ifoo']
          self.assertEqual(a, ['-Ifoo', '-I..', '-I.', '-O3', '-O2'])
          # Test that adding a list with one arg new and one old works
          a = a + ['-Ifoo', '-Ibaz']
          self.assertEqual(a, ['-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2'])
          # Test that adding args that must be prepended and appended works
          a = a + ['-Ibar', '-Wall']
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2', '-Wall'])
  
          ## Test that reflected addition works
          # Test that adding to a list with just one old arg works and yields the same array
          a = ['-Ifoo'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with just one new arg that is not pre-pended works
          a = ['-Werror'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Werror', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with two new args preserves the order
          a = ['-Ldir', '-Lbah'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Ldir', '-Lbah', '-Werror', '-O3', '-O2', '-Wall'])
          # Test that adding to a list with old args does nothing
          a = ['-Ibar', '-Ibaz', '-Ifoo'] + a
          self.assertEqual(a, ['-Ibar', '-Ifoo', '-Ibaz', '-I..', '-I.', '-Ldir', '-Lbah', '-Werror', '-O3', '-O2', '-Wall'])
  
          ## Test that adding libraries works
          l = cargsfunc(c, ['-Lfoodir', '-lfoo'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo'])
          # Adding a library and a libpath appends both correctly
          l += ['-Lbardir', '-lbar']
          self.assertEqual(l, ['-Lbardir', '-Lfoodir', '-lfoo', '-lbar'])
          # Adding the same library again does nothing
          l += ['-lbar']
          self.assertEqual(l, ['-Lbardir', '-Lfoodir', '-lfoo', '-lbar'])
  
          ## Test that 'direct' append and extend works
          l = cargsfunc(c, ['-Lfoodir', '-lfoo'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo'])
          # Direct-adding a library and a libpath appends both correctly
          l.extend_direct(['-Lbardir', '-lbar'])
          self.assertEqual(l, ['-Lfoodir', '-lfoo', '-Lbardir', '-lbar'])
          # Direct-adding the same library again still adds it
          l.append_direct('-lbar')
          self.assertEqual(l, ['-Lfoodir', '-lfoo', '-Lbardir', '-lbar', '-lbar'])
  
      def test_string_templates_substitution(self):
          dictfunc = mesonbuild.mesonlib.get_filenames_templates_dict
          substfunc = mesonbuild.mesonlib.substitute_values
          ME = mesonbuild.mesonlib.MesonException
  
          # Identity
          self.assertEqual(dictfunc([], []), {})
  
          # One input, no outputs
          inputs = ['bar/foo.c.in']
          outputs = []
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out'] + cmd[1:])
          cmd = ['@INPUT0@.out', '@PLAINNAME@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out'] + [d['@PLAINNAME@'] + '.ok'] + cmd[2:])
          cmd = ['@INPUT@', '@BASENAME@.hah', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           inputs + [d['@BASENAME@'] + '.hah'] + cmd[2:])
          cmd = ['@OUTPUT@']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # One input, one output
          inputs = ['bar/foo.c.in']
          outputs = ['out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c',
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': '.'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@.out', '@OUTPUT@', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out'] + outputs + cmd[2:])
          cmd = ['@INPUT0@.out', '@PLAINNAME@.ok', '@OUTPUT0@']
          self.assertEqual(substfunc(cmd, d),
                           [inputs[0] + '.out', d['@PLAINNAME@'] + '.ok'] + outputs)
          cmd = ['@INPUT@', '@BASENAME@.hah', 'strings']
          self.assertEqual(substfunc(cmd, d),
                           inputs + [d['@BASENAME@'] + '.hah'] + cmd[2:])
  
          # One input, one output with a subdir
          outputs = ['dir/out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0],
               '@PLAINNAME@': 'foo.c.in', '@BASENAME@': 'foo.c',
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
  
          # Two inputs, no outputs
          inputs = ['bar/foo.c.in', 'baz/foo.c.in']
          outputs = []
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1]}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@INPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), inputs + cmd[1:])
          cmd = ['@INPUT0@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out'] + cmd[1:])
          cmd = ['@INPUT0@.out', '@INPUT1@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d), [inputs[0] + '.out', inputs[1] + '.ok'] + cmd[2:])
          cmd = ['@INPUT0@', '@INPUT1@', 'strings']
          self.assertEqual(substfunc(cmd, d), inputs + cmd[2:])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Too many inputs
          cmd = ['@PLAINNAME@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@BASENAME@']
          self.assertRaises(ME, substfunc, cmd, d)
          # No outputs
          cmd = ['@OUTPUT@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@OUTPUT0@']
          self.assertRaises(ME, substfunc, cmd, d)
          cmd = ['@OUTDIR@']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # Two inputs, one output
          outputs = ['dir/out.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1],
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@OUTPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[1:])
          cmd = ['@OUTPUT@.out', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out'] + cmd[1:])
          cmd = ['@OUTPUT0@.out', '@INPUT1@.ok', 'strings']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out', inputs[1] + '.ok'] + cmd[2:])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough outputs
          cmd = ['@OUTPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
  
          # Two inputs, two outputs
          outputs = ['dir/out.c', 'dir/out2.c']
          ret = dictfunc(inputs, outputs)
          d = {'@INPUT@': inputs, '@INPUT0@': inputs[0], '@INPUT1@': inputs[1],
               '@OUTPUT@': outputs, '@OUTPUT0@': outputs[0], '@OUTPUT1@': outputs[1],
               '@OUTDIR@': 'dir'}
          # Check dictionary
          self.assertEqual(ret, d)
          # Check substitutions
          cmd = ['some', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), cmd)
          cmd = ['@OUTPUT@', 'ordinary', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[1:])
          cmd = ['@OUTPUT0@', '@OUTPUT1@', 'strings']
          self.assertEqual(substfunc(cmd, d), outputs + cmd[2:])
          cmd = ['@OUTPUT0@.out', '@INPUT1@.ok', '@OUTDIR@']
          self.assertEqual(substfunc(cmd, d), [outputs[0] + '.out', inputs[1] + '.ok', 'dir'])
          # Many inputs, can't use @INPUT@ like this
          cmd = ['@INPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough inputs
          cmd = ['@INPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Not enough outputs
          cmd = ['@OUTPUT2@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
          # Many outputs, can't use @OUTPUT@ like this
          cmd = ['@OUTPUT@.out', 'ordinary', 'strings']
          self.assertRaises(ME, substfunc, cmd, d)
  
      def test_needs_exe_wrapper_override(self):
          config = ConfigParser()
          config['binaries'] = {
              'c': '\'/usr/bin/gcc\'',
          }
          config['host_machine'] = {
              'system': '\'linux\'',
              'cpu_family': '\'arm\'',
              'cpu': '\'armv7\'',
              'endian': '\'little\'',
          }
          # Can not be used as context manager because we need to
          # open it a second time and this is not possible on
          # Windows.
          configfile = tempfile.NamedTemporaryFile(mode='w+', delete=False)
          configfilename = configfile.name
          config.write(configfile)
          configfile.flush()
          configfile.close()
          detected_value = mesonbuild.environment.CrossBuildInfo(configfile.name).need_exe_wrapper()
          os.unlink(configfilename)
  
          desired_value = not detected_value
          config['properties'] = {
              'needs_exe_wrapper': 'true' if desired_value else 'false'
          }
  
          configfile = tempfile.NamedTemporaryFile(mode='w+', delete=False)
          configfilename = configfile.name
          config.write(configfile)
          configfile.close()
          forced_value = mesonbuild.environment.CrossBuildInfo(configfile.name).need_exe_wrapper()
          os.unlink(configfilename)
  
          self.assertEqual(forced_value, desired_value)
  
      def test_listify(self):
          listify = mesonbuild.mesonlib.listify
          # Test sanity
          self.assertEqual([1], listify(1))
          self.assertEqual([], listify([]))
          self.assertEqual([1], listify([1]))
          # Test flattening
          self.assertEqual([1, 2, 3], listify([1, [2, 3]]))
          self.assertEqual([1, 2, 3], listify([1, [2, [3]]]))
          self.assertEqual([1, [2, [3]]], listify([1, [2, [3]]], flatten=False))
          # Test flattening and unholdering
          holder1 = ObjectHolder(1)
          holder3 = ObjectHolder(3)
          self.assertEqual([holder1], listify(holder1))
          self.assertEqual([holder1], listify([holder1]))
          self.assertEqual([holder1, 2], listify([holder1, 2]))
          self.assertEqual([holder1, 2, 3], listify([holder1, 2, [3]]))
          self.assertEqual([1], listify(holder1, unholder=True))
          self.assertEqual([1], listify([holder1], unholder=True))
          self.assertEqual([1, 2], listify([holder1, 2], unholder=True))
          self.assertEqual([1, 2, 3], listify([holder1, 2, [holder3]], unholder=True))
          # Unholding doesn't work recursively when not flattening
          self.assertEqual([1, [2], [holder3]], listify([holder1, [2], [holder3]], unholder=True, flatten=False))
  
      def test_extract_as_list(self):
          extract = mesonbuild.mesonlib.extract_as_list
          # Test sanity
          kwargs = {'sources': [1, 2, 3]}
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources'))
          self.assertEqual(kwargs, {'sources': [1, 2, 3]})
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', pop=True))
          self.assertEqual(kwargs, {})
          # Test unholding
          holder3 = ObjectHolder(3)
          kwargs = {'sources': [1, 2, holder3]}
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', unholder=True))
          self.assertEqual(kwargs, {'sources': [1, 2, holder3]})
          self.assertEqual([1, 2, 3], extract(kwargs, 'sources', unholder=True, pop=True))
          self.assertEqual(kwargs, {})
          # Test listification
          kwargs = {'sources': [1, 2, 3], 'pch_sources': [4, 5, 6]}
          self.assertEqual([[1, 2, 3], [4, 5, 6]], extract(kwargs, 'sources', 'pch_sources'))
  
  
  class BasePlatformTests(unittest.TestCase):
      def setUp(self):
          super().setUp()
          src_root = os.path.dirname(__file__)
          src_root = os.path.join(os.getcwd(), src_root)
          self.src_root = src_root
          self.prefix = '/usr'
          self.libdir = os.path.join(self.prefix, 'lib')
          # Get the backend
          # FIXME: Extract this from argv?
          self.backend = getattr(Backend, os.environ.get('MESON_UNIT_TEST_BACKEND', 'ninja'))
          self.meson_mainfile = os.path.join(src_root, 'meson.py')
          self.meson_args = ['--backend=' + self.backend.name]
          self.meson_command = meson_command + self.meson_args
          self.mconf_command = meson_command + ['configure']
          self.mintro_command = meson_command + ['introspect']
          self.wrap_command = meson_command + ['wrap']
          # Backend-specific build commands
          self.build_command, self.clean_command, self.test_command, self.install_command, \
              self.uninstall_command = get_backend_commands(self.backend)
          # Test directories
          self.common_test_dir = os.path.join(src_root, 'test cases/common')
          self.vala_test_dir = os.path.join(src_root, 'test cases/vala')
          self.framework_test_dir = os.path.join(src_root, 'test cases/frameworks')
          self.unit_test_dir = os.path.join(src_root, 'test cases/unit')
          # Misc stuff
          self.orig_env = os.environ.copy()
          if self.backend is Backend.ninja:
              self.no_rebuild_stdout = 'ninja: no work to do.'
          else:
              # VS doesn't have a stable output when no changes are done
              # XCode backend is untested with unit tests, help welcome!
              self.no_rebuild_stdout = 'UNKNOWN BACKEND {!r}'.format(self.backend.name)
  
          self.builddirs = []
          self.new_builddir()
  
      def change_builddir(self, newdir):
          self.builddir = newdir
          self.privatedir = os.path.join(self.builddir, 'meson-private')
          self.logdir = os.path.join(self.builddir, 'meson-logs')
          self.installdir = os.path.join(self.builddir, 'install')
          self.distdir = os.path.join(self.builddir, 'meson-dist')
          self.mtest_command = meson_command + ['test', '-C', self.builddir]
          self.builddirs.append(self.builddir)
  
      def new_builddir(self):
          # In case the directory is inside a symlinked directory, find the real
          # path otherwise we might not find the srcdir from inside the builddir.
          newdir = os.path.realpath(tempfile.mkdtemp())
          self.change_builddir(newdir)
  
      def _print_meson_log(self):
          log = os.path.join(self.logdir, 'meson-log.txt')
          if not os.path.isfile(log):
              print("{!r} doesn't exist".format(log))
              return
          with open(log, 'r', encoding='utf-8') as f:
              print(f.read())
  
      def tearDown(self):
          for path in self.builddirs:
              try:
                  windows_proof_rmtree(path)
              except FileNotFoundError:
                  pass
          os.environ = self.orig_env
          super().tearDown()
  
      def _run(self, command, workdir=None):
          '''
          Run a command while printing the stdout and stderr to stdout,
          and also return a copy of it
          '''
          p = subprocess.Popen(command, stdout=subprocess.PIPE,
                               stderr=subprocess.STDOUT, env=os.environ.copy(),
                               universal_newlines=True, cwd=workdir)
          output = p.communicate()[0]
          print(output)
          if p.returncode != 0:
              if 'MESON_SKIP_TEST' in output:
                  raise unittest.SkipTest('Project requested skipping.')
              raise subprocess.CalledProcessError(p.returncode, command)
          return output
  
      def init(self, srcdir, extra_args=None, default_args=True, inprocess=False):
          self.assertPathExists(srcdir)
          if extra_args is None:
              extra_args = []
          if not isinstance(extra_args, list):
              extra_args = [extra_args]
          args = [srcdir, self.builddir]
          if default_args:
              args += ['--prefix', self.prefix,
                       '--libdir', self.libdir]
          self.privatedir = os.path.join(self.builddir, 'meson-private')
          if inprocess:
              try:
                  (returncode, out, _) = run_configure(self.meson_mainfile, self.meson_args + args + extra_args)
                  if returncode != 0:
                      self._print_meson_log()
                      raise RuntimeError('Configure failed')
              except:
                  self._print_meson_log()
                  raise
              finally:
                  # Close log file to satisfy Windows file locking
                  mesonbuild.mlog.shutdown()
                  mesonbuild.mlog.log_dir = None
                  mesonbuild.mlog.log_file = None
          else:
              try:
                  out = self._run(self.meson_command + args + extra_args)
              except unittest.SkipTest:
                  raise unittest.SkipTest('Project requested skipping: ' + srcdir)
              except:
                  self._print_meson_log()
                  raise
          return out
  
      def build(self, target=None, extra_args=None):
          if extra_args is None:
              extra_args = []
          # Add arguments for building the target (if specified),
          # and using the build dir (if required, with VS)
          args = get_builddir_target_args(self.backend, self.builddir, target)
          return self._run(self.build_command + args + extra_args, workdir=self.builddir)
  
      def clean(self):
          dir_args = get_builddir_target_args(self.backend, self.builddir, None)
          self._run(self.clean_command + dir_args, workdir=self.builddir)
  
      def run_tests(self):
          self._run(self.test_command, workdir=self.builddir)
  
      def install(self):
          if self.backend is not Backend.ninja:
              raise unittest.SkipTest('{!r} backend can\'t install files'.format(self.backend.name))
          os.environ['DESTDIR'] = self.installdir
          self._run(self.install_command, workdir=self.builddir)
  
      def uninstall(self):
          self._run(self.uninstall_command, workdir=self.builddir)
  
      def run_target(self, target):
          '''
          Run a Ninja target while printing the stdout and stderr to stdout,
          and also return a copy of it
          '''
          return self.build(target=target)
  
      def setconf(self, arg, will_build=True):
          if will_build:
              ensure_backend_detects_changes(self.backend)
          self._run(self.mconf_command + [arg, self.builddir])
  
      def wipe(self):
          windows_proof_rmtree(self.builddir)
  
      def utime(self, f):
          ensure_backend_detects_changes(self.backend)
          os.utime(f)
  
      def get_compdb(self):
          if self.backend is not Backend.ninja:
              raise unittest.SkipTest('Compiler db not available with {} backend'.format(self.backend.name))
          with open(os.path.join(self.builddir, 'compile_commands.json')) as ifile:
              contents = json.load(ifile)
          # If Ninja is using .rsp files, generate them, read their contents, and
          # replace it as the command for all compile commands in the parsed json.
          if len(contents) > 0 and contents[0]['command'].endswith('.rsp'):
              # Pretend to build so that the rsp files are generated
              self.build(extra_args=['-d', 'keeprsp', '-n'])
              for each in contents:
                  # Extract the actual command from the rsp file
                  compiler, rsp = each['command'].split(' @')
                  rsp = os.path.join(self.builddir, rsp)
                  # Replace the command with its contents
                  with open(rsp, 'r', encoding='utf-8') as f:
                      each['command'] = compiler + ' ' + f.read()
          return contents
  
      def get_meson_log(self):
          with open(os.path.join(self.builddir, 'meson-logs', 'meson-log.txt')) as f:
              return f.readlines()
  
      def get_meson_log_compiler_checks(self):
          '''
          Fetch a list command-lines run by meson for compiler checks.
          Each command-line is returned as a list of arguments.
          '''
          log = self.get_meson_log()
          prefix = 'Command line:'
          cmds = [l[len(prefix):].split() for l in log if l.startswith(prefix)]
          return cmds
  
      def introspect(self, arg):
          out = subprocess.check_output(self.mintro_command + [arg, self.builddir],
                                        universal_newlines=True)
          return json.loads(out)
  
      def assertPathEqual(self, path1, path2):
          '''
          Handles a lot of platform-specific quirks related to paths such as
          separator, case-sensitivity, etc.
          '''
          self.assertEqual(PurePath(path1), PurePath(path2))
  
      def assertPathBasenameEqual(self, path, basename):
          msg = '{!r} does not end with {!r}'.format(path, basename)
          # We cannot use os.path.basename because it returns '' when the path
          # ends with '/' for some silly reason. This is not how the UNIX utility
          # `basename` works.
          path_basename = PurePath(path).parts[-1]
          self.assertEqual(PurePath(path_basename), PurePath(basename), msg)
  
      def assertBuildIsNoop(self):
          ret = self.build()
          if self.backend is Backend.ninja:
              self.assertEqual(ret.split('\n')[-2], self.no_rebuild_stdout)
          elif self.backend is Backend.vs:
              # Ensure that some target said that no rebuild was done
              self.assertIn('CustomBuild:\n  All outputs are up-to-date.', ret)
              self.assertIn('ClCompile:\n  All outputs are up-to-date.', ret)
              self.assertIn('Link:\n  All outputs are up-to-date.', ret)
              # Ensure that no targets were built
              clre = re.compile('ClCompile:\n [^\n]*cl', flags=re.IGNORECASE)
              linkre = re.compile('Link:\n [^\n]*link', flags=re.IGNORECASE)
              self.assertNotRegex(ret, clre)
              self.assertNotRegex(ret, linkre)
          elif self.backend is Backend.xcode:
              raise unittest.SkipTest('Please help us fix this test on the xcode backend')
          else:
             
  
  [... the rest is omitted ...]
files: run_unittests.py