text: # -*- coding: utf-8 -*-
  __all__ = ['Distribution']
  
  import io
  import sys
  import re
  import os
  import warnings
  import numbers
  import distutils.log
  import distutils.core
  import distutils.cmd
  import distutils.dist
  from distutils.util import strtobool
  from distutils.debug import DEBUG
  from distutils.fancy_getopt import translate_longopt
  import itertools
  
  from collections import defaultdict
  from email import message_from_file
  
  from distutils.errors import DistutilsOptionError, DistutilsSetupError
  from distutils.util import rfc822_escape
  from distutils.version import StrictVersion
  
  from setuptools.extern import packaging
  from setuptools.extern import ordered_set
  
  from . import SetuptoolsDeprecationWarning
  
  import setuptools
  from setuptools import windows_support
  from setuptools.monkey import get_unpatched
  from setuptools.config import parse_configuration
  import pkg_resources
  
  __import__('setuptools.extern.packaging.specifiers')
  __import__('setuptools.extern.packaging.version')
  
  
  def _get_unpatched(cls):
      warnings.warn("Do not call this function", DistDeprecationWarning)
      return get_unpatched(cls)
  
  
  def get_metadata_version(self):
      mv = getattr(self, 'metadata_version', None)
  
      if mv is None:
          if self.long_description_content_type or self.provides_extras:
              mv = StrictVersion('2.1')
          elif (self.maintainer is not None or
                self.maintainer_email is not None or
                getattr(self, 'python_requires', None) is not None or
                self.project_urls):
              mv = StrictVersion('1.2')
          elif (self.provides or self.requires or self.obsoletes or
                  self.classifiers or self.download_url):
              mv = StrictVersion('1.1')
          else:
              mv = StrictVersion('1.0')
  
          self.metadata_version = mv
  
      return mv
  
  
  def read_pkg_file(self, file):
      """Reads the metadata values from a file object."""
      msg = message_from_file(file)
  
      def _read_field(name):
          value = msg[name]
          if value == 'UNKNOWN':
              return None
          return value
  
      def _read_list(name):
          values = msg.get_all(name, None)
          if values == []:
              return None
          return values
  
      self.metadata_version = StrictVersion(msg['metadata-version'])
      self.name = _read_field('name')
      self.version = _read_field('version')
      self.description = _read_field('summary')
      # we are filling author only.
      self.author = _read_field('author')
      self.maintainer = None
      self.author_email = _read_field('author-email')
      self.maintainer_email = None
      self.url = _read_field('home-page')
      self.license = _read_field('license')
  
      if 'download-url' in msg:
          self.download_url = _read_field('download-url')
      else:
          self.download_url = None
  
      self.long_description = _read_field('description')
      self.description = _read_field('summary')
  
      if 'keywords' in msg:
          self.keywords = _read_field('keywords').split(',')
  
      self.platforms = _read_list('platform')
      self.classifiers = _read_list('classifier')
  
      # PEP 314 - these fields only exist in 1.1
      if self.metadata_version == StrictVersion('1.1'):
          self.requires = _read_list('requires')
          self.provides = _read_list('provides')
          self.obsoletes = _read_list('obsoletes')
      else:
          self.requires = None
          self.provides = None
          self.obsoletes = None
  
  
  # Based on Python 3.5 version
  def write_pkg_file(self, file):
      """Write the PKG-INFO format data to a file object.
      """
      version = self.get_metadata_version()
  
      def write_field(key, value):
          file.write("%s: %s\n" % (key, value))
  
      write_field('Metadata-Version', str(version))
      write_field('Name', self.get_name())
      write_field('Version', self.get_version())
      write_field('Summary', self.get_description())
      write_field('Home-page', self.get_url())
  
      if version < StrictVersion('1.2'):
          write_field('Author', self.get_contact())
          write_field('Author-email', self.get_contact_email())
      else:
          optional_fields = (
              ('Author', 'author'),
              ('Author-email', 'author_email'),
              ('Maintainer', 'maintainer'),
              ('Maintainer-email', 'maintainer_email'),
          )
  
          for field, attr in optional_fields:
              attr_val = getattr(self, attr)
  
              if attr_val is not None:
                  write_field(field, attr_val)
  
      write_field('License', self.get_license())
      if self.download_url:
          write_field('Download-URL', self.download_url)
      for project_url in self.project_urls.items():
          write_field('Project-URL', '%s, %s' % project_url)
  
      long_desc = rfc822_escape(self.get_long_description())
      write_field('Description', long_desc)
  
      keywords = ','.join(self.get_keywords())
      if keywords:
          write_field('Keywords', keywords)
  
      if version >= StrictVersion('1.2'):
          for platform in self.get_platforms():
              write_field('Platform', platform)
      else:
          self._write_list(file, 'Platform', self.get_platforms())
  
      self._write_list(file, 'Classifier', self.get_classifiers())
  
      # PEP 314
      self._write_list(file, 'Requires', self.get_requires())
      self._write_list(file, 'Provides', self.get_provides())
      self._write_list(file, 'Obsoletes', self.get_obsoletes())
  
      # Setuptools specific for PEP 345
      if hasattr(self, 'python_requires'):
          write_field('Requires-Python', self.python_requires)
  
      # PEP 566
      if self.long_description_content_type:
          write_field(
              'Description-Content-Type',
              self.long_description_content_type
          )
      if self.provides_extras:
          for extra in self.provides_extras:
              write_field('Provides-Extra', extra)
  
  
  sequence = tuple, list
  
  
  def check_importable(dist, attr, value):
      try:
          ep = pkg_resources.EntryPoint.parse('x=' + value)
          assert not ep.extras
      except (TypeError, ValueError, AttributeError, AssertionError) as e:
          raise DistutilsSetupError(
              "%r must be importable 'module:attrs' string (got %r)"
              % (attr, value)
          ) from e
  
  
  def assert_string_list(dist, attr, value):
      """Verify that value is a string list"""
      try:
          # verify that value is a list or tuple to exclude unordered
          # or single-use iterables
          assert isinstance(value, (list, tuple))
          # verify that elements of value are strings
          assert ''.join(value) != value
      except (TypeError, ValueError, AttributeError, AssertionError) as e:
          raise DistutilsSetupError(
              "%r must be a list of strings (got %r)" % (attr, value)
          ) from e
  
  
  def check_nsp(dist, attr, value):
      """Verify that namespace packages are valid"""
      ns_packages = value
      assert_string_list(dist, attr, ns_packages)
      for nsp in ns_packages:
          if not dist.has_contents_for(nsp):
              raise DistutilsSetupError(
                  "Distribution contains no modules or packages for " +
                  "namespace package %r" % nsp
              )
          parent, sep, child = nsp.rpartition('.')
          if parent and parent not in ns_packages:
              distutils.log.warn(
                  "WARNING: %r is declared as a package namespace, but %r"
                  " is not: please correct this in setup.py", nsp, parent
              )
  
  
  def check_extras(dist, attr, value):
      """Verify that extras_require mapping is valid"""
      try:
          list(itertools.starmap(_check_extra, value.items()))
      except (TypeError, ValueError, AttributeError) as e:
          raise DistutilsSetupError(
              "'extras_require' must be a dictionary whose values are "
              "strings or lists of strings containing valid project/version "
              "requirement specifiers."
          ) from e
  
  
  def _check_extra(extra, reqs):
      name, sep, marker = extra.partition(':')
      if marker and pkg_resources.invalid_marker(marker):
          raise DistutilsSetupError("Invalid environment marker: " + marker)
      list(pkg_resources.parse_requirements(reqs))
  
  
  def assert_bool(dist, attr, value):
      """Verify that value is True, False, 0, or 1"""
      if bool(value) != value:
          tmpl = "{attr!r} must be a boolean value (got {value!r})"
          raise DistutilsSetupError(tmpl.format(attr=attr, value=value))
  
  
  def check_requirements(dist, attr, value):
      """Verify that install_requires is a valid requirements list"""
      try:
          list(pkg_resources.parse_requirements(value))
          if isinstance(value, (dict, set)):
              raise TypeError("Unordered types are not allowed")
      except (TypeError, ValueError) as error:
          tmpl = (
              "{attr!r} must be a string or list of strings "
              "containing valid project/version requirement specifiers; {error}"
          )
          raise DistutilsSetupError(
              tmpl.format(attr=attr, error=error)
          ) from error
  
  
  def check_specifier(dist, attr, value):
      """Verify that value is a valid version specifier"""
      try:
          packaging.specifiers.SpecifierSet(value)
      except packaging.specifiers.InvalidSpecifier as error:
          tmpl = (
              "{attr!r} must be a string "
              "containing valid version specifiers; {error}"
          )
          raise DistutilsSetupError(
              tmpl.format(attr=attr, error=error)
          ) from error
  
  
  def check_entry_points(dist, attr, value):
      """Verify that entry_points map is parseable"""
      try:
          pkg_resources.EntryPoint.parse_map(value)
      except ValueError as e:
          raise DistutilsSetupError(e) from e
  
  
  def check_test_suite(dist, attr, value):
      if not isinstance(value, str):
          raise DistutilsSetupError("test_suite must be a string")
  
  
  def check_package_data(dist, attr, value):
      """Verify that value is a dictionary of package names to glob lists"""
      if not isinstance(value, dict):
          raise DistutilsSetupError(
              "{!r} must be a dictionary mapping package names to lists of "
              "string wildcard patterns".format(attr))
      for k, v in value.items():
          if not isinstance(k, str):
              raise DistutilsSetupError(
                  "keys of {!r} dict must be strings (got {!r})"
                  .format(attr, k)
              )
          assert_string_list(dist, 'values of {!r} dict'.format(attr), v)
  
  
  def check_packages(dist, attr, value):
      for pkgname in value:
          if not re.match(r'\w+(\.\w+)*', pkgname):
              distutils.log.warn(
                  "WARNING: %r not a valid package name; please use only "
                  ".-separated package names in setup.py", pkgname
              )
  
  
  _Distribution = get_unpatched(distutils.core.Distribution)
  
  
  class Distribution(_Distribution):
      """Distribution with support for tests and package data
  
      This is an enhanced version of 'distutils.dist.Distribution' that
      effectively adds the following new optional keyword arguments to 'setup()':
  
       'install_requires' -- a string or sequence of strings specifying project
          versions that the distribution requires when installed, in the format
          used by 'pkg_resources.require()'.  They will be installed
          automatically when the package is installed.  If you wish to use
          packages that are not available in PyPI, or want to give your users an
          alternate download location, you can add a 'find_links' option to the
          '[easy_install]' section of your project's 'setup.cfg' file, and then
          setuptools will scan the listed web pages for links that satisfy the
          requirements.
  
       'extras_require' -- a dictionary mapping names of optional "extras" to the
          additional requirement(s) that using those extras incurs. For example,
          this::
  
              extras_require = dict(reST = ["docutils>=0.3", "reSTedit"])
  
          indicates that the distribution can optionally provide an extra
          capability called "reST", but it can only be used if docutils and
          reSTedit are installed.  If the user installs your package using
          EasyInstall and requests one of your extras, the corresponding
          additional requirements will be installed if needed.
  
       'test_suite' -- the name of a test suite to run for the 'test' command.
          If the user runs 'python setup.py test', the package will be installed,
          and the named test suite will be run.  The format is the same as
          would be used on a 'unittest.py' command line.  That is, it is the
          dotted name of an object to import and call to generate a test suite.
  
       'package_data' -- a dictionary mapping package names to lists of filenames
          or globs to use to find data files contained in the named packages.
          If the dictionary has filenames or globs listed under '""' (the empty
          string), those names will be searched for in every package, in addition
          to any names for the specific package.  Data files found using these
          names/globs will be installed along with the package, in the same
          location as the package.  Note that globs are allowed to reference
          the contents of non-package subdirectories, as long as you use '/' as
          a path separator.  (Globs are automatically converted to
          platform-specific paths at runtime.)
  
      In addition to these new keywords, this class also has several new methods
      for manipulating the distribution's contents.  For example, the 'include()'
      and 'exclude()' methods can be thought of as in-place add and subtract
      commands that add or remove packages, modules, extensions, and so on from
      the distribution.
      """
  
      _DISTUTILS_UNSUPPORTED_METADATA = {
          'long_description_content_type': None,
          'project_urls': dict,
          'provides_extras': ordered_set.OrderedSet,
          'license_files': ordered_set.OrderedSet,
      }
  
      _patched_dist = None
  
      def patch_missing_pkg_info(self, attrs):
          # Fake up a replacement for the data that would normally come from
          # PKG-INFO, but which might not yet be built if this is a fresh
          # checkout.
          #
          if not attrs or 'name' not in attrs or 'version' not in attrs:
              return
          key = pkg_resources.safe_name(str(attrs['name'])).lower()
          dist = pkg_resources.working_set.by_key.get(key)
          if dist is not None and not dist.has_metadata('PKG-INFO'):
              dist._version = pkg_resources.safe_version(str(attrs['version']))
              self._patched_dist = dist
  
      def __init__(self, attrs=None):
          have_package_data = hasattr(self, "package_data")
          if not have_package_data:
              self.package_data = {}
          attrs = attrs or {}
          self.dist_files = []
          # Filter-out setuptools' specific options.
          self.src_root = attrs.pop("src_root", None)
          self.patch_missing_pkg_info(attrs)
          self.dependency_links = attrs.pop('dependency_links', [])
          self.setup_requires = attrs.pop('setup_requires', [])
          for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
              vars(self).setdefault(ep.name, None)
          _Distribution.__init__(self, {
              k: v for k, v in attrs.items()
              if k not in self._DISTUTILS_UNSUPPORTED_METADATA
          })
  
          # Fill-in missing metadata fields not supported by distutils.
          # Note some fields may have been set by other tools (e.g. pbr)
          # above; they are taken preferrentially to setup() arguments
          for option, default in self._DISTUTILS_UNSUPPORTED_METADATA.items():
              for source in self.metadata.__dict__, attrs:
                  if option in source:
                      value = source[option]
                      break
              else:
                  value = default() if default else None
              setattr(self.metadata, option, value)
  
          self.metadata.version = self._normalize_version(
              self._validate_version(self.metadata.version))
          self._finalize_requires()
  
      @staticmethod
      def _normalize_version(version):
          if isinstance(version, setuptools.sic) or version is None:
              return version
  
          normalized = str(packaging.version.Version(version))
          if version != normalized:
              tmpl = "Normalizing '{version}' to '{normalized}'"
              warnings.warn(tmpl.format(**locals()))
              return normalized
          return version
  
      @staticmethod
      def _validate_version(version):
          if isinstance(version, numbers.Number):
              # Some people apparently take "version number" too literally :)
              version = str(version)
  
          if version is not None:
              try:
                  packaging.version.Version(version)
              except (packaging.version.InvalidVersion, TypeError):
                  warnings.warn(
                      "The version specified (%r) is an invalid version, this "
                      "may not work as expected with newer versions of "
                      "setuptools, pip, and PyPI. Please see PEP 440 for more "
                      "details." % version
                  )
                  return setuptools.sic(version)
          return version
  
      def _finalize_requires(self):
          """
          Set `metadata.python_requires` and fix environment markers
          in `install_requires` and `extras_require`.
          """
          if getattr(self, 'python_requires', None):
              self.metadata.python_requires = self.python_requires
  
          if getattr(self, 'extras_require', None):
              for extra in self.extras_require.keys():
                  # Since this gets called multiple times at points where the
                  # keys have become 'converted' extras, ensure that we are only
                  # truly adding extras we haven't seen before here.
                  extra = extra.split(':')[0]
                  if extra:
                      self.metadata.provides_extras.add(extra)
  
          self._convert_extras_requirements()
          self._move_install_requirements_markers()
  
      def _convert_extras_requirements(self):
          """
          Convert requirements in `extras_require` of the form
          `"extra": ["barbazquux; {marker}"]` to
          `"extra:{marker}": ["barbazquux"]`.
          """
          spec_ext_reqs = getattr(self, 'extras_require', None) or {}
          self._tmp_extras_require = defaultdict(list)
          for section, v in spec_ext_reqs.items():
              # Do not strip empty sections.
              self._tmp_extras_require[section]
              for r in pkg_resources.parse_requirements(v):
                  suffix = self._suffix_for(r)
                  self._tmp_extras_require[section + suffix].append(r)
  
      @staticmethod
      def _suffix_for(req):
          """
          For a requirement, return the 'extras_require' suffix for
          that requirement.
          """
          return ':' + str(req.marker) if req.marker else ''
  
      def _move_install_requirements_markers(self):
          """
          Move requirements in `install_requires` that are using environment
          markers `extras_require`.
          """
  
          # divide the install_requires into two sets, simple ones still
          # handled by install_requires and more complex ones handled
          # by extras_require.
  
          def is_simple_req(req):
              return not req.marker
  
          spec_inst_reqs = getattr(self, 'install_requires', None) or ()
          inst_reqs = list(pkg_resources.parse_requirements(spec_inst_reqs))
          simple_reqs = filter(is_simple_req, inst_reqs)
          complex_reqs = itertools.filterfalse(is_simple_req, inst_reqs)
          self.install_requires = list(map(str, simple_reqs))
  
          for r in complex_reqs:
              self._tmp_extras_require[':' + str(r.marker)].append(r)
          self.extras_require = dict(
              (k, [str(r) for r in map(self._clean_req, v)])
              for k, v in self._tmp_extras_require.items()
          )
  
      def _clean_req(self, req):
          """
          Given a Requirement, remove environment markers and return it.
          """
          req.marker = None
          return req
  
      def _parse_config_files(self, filenames=None):
          """
          Adapted from distutils.dist.Distribution.parse_config_files,
          this method provides the same functionality in subtly-improved
          ways.
          """
          from configparser import ConfigParser
  
          # Ignore install directory options if we have a venv
          if sys.prefix != sys.base_prefix:
              ignore_options = [
                  'install-base', 'install-platbase', 'install-lib',
                  'install-platlib', 'install-purelib', 'install-headers',
                  'install-scripts', 'install-data', 'prefix', 'exec-prefix',
                  'home', 'user', 'root']
          else:
              ignore_options = []
  
          ignore_options = frozenset(ignore_options)
  
          if filenames is None:
              filenames = self.find_config_files()
  
          if DEBUG:
              self.announce("Distribution.parse_config_files():")
  
          parser = ConfigParser()
          for filename in filenames:
              with io.open(filename, encoding='utf-8') as reader:
                  if DEBUG:
                      self.announce("  reading {filename}".format(**locals()))
                  parser.read_file(reader)
              for section in parser.sections():
                  options = parser.options(section)
                  opt_dict = self.get_option_dict(section)
  
                  for opt in options:
                      if opt != '__name__' and opt not in ignore_options:
                          val = parser.get(section, opt)
                          opt = opt.replace('-', '_')
                          opt_dict[opt] = (filename, val)
  
              # Make the ConfigParser forget everything (so we retain
              # the original filenames that options come from)
              parser.__init__()
  
          # If there was a "global" section in the config file, use it
          # to set Distribution options.
  
          if 'global' in self.command_options:
              for (opt, (src, val)) in self.command_options['global'].items():
                  alias = self.negative_opt.get(opt)
                  try:
                      if alias:
                          setattr(self, alias, not strtobool(val))
                      elif opt in ('verbose', 'dry_run'):  # ugh!
                          setattr(self, opt, strtobool(val))
                      else:
                          setattr(self, opt, val)
                  except ValueError as e:
                      raise DistutilsOptionError(e) from e
  
      def _set_command_options(self, command_obj, option_dict=None):
          """
          Set the options for 'command_obj' from 'option_dict'.  Basically
          this means copying elements of a dictionary ('option_dict') to
          attributes of an instance ('command').
  
          'command_obj' must be a Command instance.  If 'option_dict' is not
          supplied, uses the standard option dictionary for this command
          (from 'self.command_options').
  
          (Adopted from distutils.dist.Distribution._set_command_options)
          """
          command_name = command_obj.get_command_name()
          if option_dict is None:
              option_dict = self.get_option_dict(command_name)
  
          if DEBUG:
              self.announce("  setting options for '%s' command:" % command_name)
          for (option, (source, value)) in option_dict.items():
              if DEBUG:
                  self.announce("    %s = %s (from %s)" % (option, value,
                                                           source))
              try:
                  bool_opts = [translate_longopt(o)
                               for o in command_obj.boolean_options]
              except AttributeError:
                  bool_opts = []
              try:
                  neg_opt = command_obj.negative_opt
              except AttributeError:
                  neg_opt = {}
  
              try:
                  is_string = isinstance(value, str)
                  if option in neg_opt and is_string:
                      setattr(command_obj, neg_opt[option], not strtobool(value))
                  elif option in bool_opts and is_string:
                      setattr(command_obj, option, strtobool(value))
                  elif hasattr(command_obj, option):
                      setattr(command_obj, option, value)
                  else:
                      raise DistutilsOptionError(
                          "error in %s: command '%s' has no such option '%s'"
                          % (source, command_name, option))
              except ValueError as e:
                  raise DistutilsOptionError(e) from e
  
      def parse_config_files(self, filenames=None, ignore_option_errors=False):
          """Parses configuration files from various levels
          and loads configuration.
  
          """
          self._parse_config_files(filenames=filenames)
  
          parse_configuration(self, self.command_options,
                              ignore_option_errors=ignore_option_errors)
          self._finalize_requires()
  
      def fetch_build_eggs(self, requires):
          """Resolve pre-setup requirements"""
          resolved_dists = pkg_resources.working_set.resolve(
              pkg_resources.parse_requirements(requires),
              installer=self.fetch_build_egg,
              replace_conflicting=True,
          )
          for dist in resolved_dists:
              pkg_resources.working_set.add(dist, replace=True)
          return resolved_dists
  
      def finalize_options(self):
          """
          Allow plugins to apply arbitrary operations to the
          distribution. Each hook may optionally define a 'order'
          to influence the order of execution. Smaller numbers
          go first and the default is 0.
          """
          group = 'setuptools.finalize_distribution_options'
  
          def by_order(hook):
              return getattr(hook, 'order', 0)
          eps = map(lambda e: e.load(), pkg_resources.iter_entry_points(group))
          for ep in sorted(eps, key=by_order):
              ep(self)
  
      def _finalize_setup_keywords(self):
          for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
              value = getattr(self, ep.name, None)
              if value is not None:
                  ep.require(installer=self.fetch_build_egg)
                  ep.load()(self, ep.name, value)
  
      def _finalize_2to3_doctests(self):
          if getattr(self, 'convert_2to3_doctests', None):
              # XXX may convert to set here when we can rely on set being builtin
              self.convert_2to3_doctests = [
                  os.path.abspath(p)
                  for p in self.convert_2to3_doctests
              ]
          else:
              self.convert_2to3_doctests = []
  
      def get_egg_cache_dir(self):
          egg_cache_dir = os.path.join(os.curdir, '.eggs')
          if not os.path.exists(egg_cache_dir):
              os.mkdir(egg_cache_dir)
              windows_support.hide_file(egg_cache_dir)
              readme_txt_filename = os.path.join(egg_cache_dir, 'README.txt')
              with open(readme_txt_filename, 'w') as f:
                  f.write('This directory contains eggs that were downloaded '
                          'by setuptools to build, test, and run plug-ins.\n\n')
                  f.write('This directory caches those eggs to prevent '
                          'repeated downloads.\n\n')
                  f.write('However, it is safe to delete this directory.\n\n')
  
          return egg_cache_dir
  
      def fetch_build_egg(self, req):
          """Fetch an egg needed for building"""
          from setuptools.installer import fetch_build_egg
          return fetch_build_egg(self, req)
  
      def get_command_class(self, command):
          """Pluggable version of get_command_class()"""
          if command in self.cmdclass:
              return self.cmdclass[command]
  
          eps = pkg_resources.iter_entry_points('distutils.commands', command)
          for ep in eps:
              ep.require(installer=self.fetch_build_egg)
              self.cmdclass[command] = cmdclass = ep.load()
              return cmdclass
          else:
              return _Distribution.get_command_class(self, command)
  
      def print_commands(self):
          for ep in pkg_resources.iter_entry_points('distutils.commands'):
              if ep.name not in self.cmdclass:
                  # don't require extras as the commands won't be invoked
                  cmdclass = ep.resolve()
                  self.cmdclass[ep.name] = cmdclass
          return _Distribution.print_commands(self)
  
      def get_command_list(self):
          for ep in pkg_resources.iter_entry_points('distutils.commands'):
              if ep.name not in self.cmdclass:
                  # don't require extras as the commands won't be invoked
                  cmdclass = ep.resolve()
                  self.cmdclass[ep.name] = cmdclass
          return _Distribution.get_command_list(self)
  
      def include(self, **attrs):
          """Add items to distribution that are named in keyword arguments
  
          For example, 'dist.include(py_modules=["x"])' would add 'x' to
          the distribution's 'py_modules' attribute, if it was not already
          there.
  
          Currently, this method only supports inclusion for attributes that are
          lists or tuples.  If you need to add support for adding to other
          attributes in this or a subclass, you can add an '_include_X' method,
          where 'X' is the name of the attribute.  The method will be called with
          the value passed to 'include()'.  So, 'dist.include(foo={"bar":"baz"})'
          will try to call 'dist._include_foo({"bar":"baz"})', which can then
          handle whatever special inclusion logic is needed.
          """
          for k, v in attrs.items():
              include = getattr(self, '_include_' + k, None)
              if include:
                  include(v)
              else:
                  self._include_misc(k, v)
  
      def exclude_package(self, package):
          """Remove packages, modules, and extensions in named package"""
  
          pfx = package + '.'
          if self.packages:
              self.packages = [
                  p for p in self.packages
                  if p != package and not p.startswith(pfx)
              ]
  
          if self.py_modules:
              self.py_modules = [
                  p for p in self.py_modules
                  if p != package and not p.startswith(pfx)
              ]
  
          if self.ext_modules:
              self.ext_modules = [
                  p for p in self.ext_modules
                  if p.name != package and not p.name.startswith(pfx)
              ]
  
      def has_contents_for(self, package):
          """Return true if 'exclude_package(package)' would do something"""
  
          pfx = package + '.'
  
          for p in self.iter_distribution_names():
              if p == package or p.startswith(pfx):
                  return True
  
      def _exclude_misc(self, name, value):
          """Handle 'exclude()' for list/tuple attrs without a special handler"""
          if not isinstance(value, sequence):
              raise DistutilsSetupError(
                  "%s: setting must be a list or tuple (%r)" % (name, value)
              )
          try:
              old = getattr(self, name)
          except AttributeError as e:
              raise DistutilsSetupError(
                  "%s: No such distribution setting" % name
              ) from e
          if old is not None and not isinstance(old, sequence):
              raise DistutilsSetupError(
                  name + ": this setting cannot be changed via include/exclude"
              )
          elif old:
              setattr(self, name, [item for item in old if item not in value])
  
      def _include_misc(self, name, value):
          """Handle 'include()' for list/tuple attrs without a special handler"""
  
          if not isinstance(value, sequence):
              raise DistutilsSetupError(
                  "%s: setting must be a list (%r)" % (name, value)
              )
          try:
              old = getattr(self, name)
          except AttributeError as e:
              raise DistutilsSetupError(
                  "%s: No such distribution setting" % name
              ) from e
          if old is None:
              setattr(self, name, value)
          elif not isinstance(old, sequence):
              raise DistutilsSetupError(
                  name + ": this setting cannot be changed via include/exclude"
              )
          else:
              new = [item for item in value if item not in old]
              setattr(self, name, old + new)
  
      def exclude(self, **attrs):
          """Remove items from distribution that are named in keyword arguments
  
          For example, 'dist.exclude(py_modules=["x"])' would remove 'x' from
          the distribution's 'py_modules' attribute.  Excluding packages uses
          the 'exclude_package()' method, so all of the package's contained
          packages, modules, and extensions are also excluded.
  
          Currently, this method only supports exclusion from attributes that are
          lists or tuples.  If you need to add support for excluding from other
          attributes in this or a subclass, you can add an '_exclude_X' method,
          where 'X' is the name of the attribute.  The method will be called with
          the value passed to 'exclude()'.  So, 'dist.exclude(foo={"bar":"baz"})'
          will try to call 'dist._exclude_foo({"bar":"baz"})', which can then
          handle whatever special exclusion logic is needed.
          """
          for k, v in attrs.items():
              exclude = getattr(self, '_exclude_' + k, None)
              if exclude:
                  exclude(v)
              else:
                  self._exclude_misc(k, v)
  
      def _exclude_packages(self, packages):
          if not isinstance(packages, sequence):
              raise DistutilsSetupError(
                  "packages: setting must be a list or tuple (%r)" % (packages,)
              )
          list(map(self.exclude_package, packages))
  
      def _parse_command_opts(self, parser, args):
          # Remove --with-X/--without-X options when processing command args
          self.global_options = self.__class__.global_options
          self.negative_opt = self.__class__.negative_opt
  
          # First, expand any aliases
          command = args[0]
          aliases = self.get_option_dict('aliases')
          while command in aliases:
              src, alias = aliases[command]
              del aliases[command]  # ensure each alias can expand only once!
              import shlex
              args[:1] = shlex.split(alias, True)
              command = args[0]
  
          nargs = _Distribution._parse_command_opts(self, parser, args)
  
          # Handle commands that want to consume all remaining arguments
          cmd_class = self.get_command_class(command)
          if getattr(cmd_class, 'command_consumes_arguments', None):
              self.get_option_dict(command)['args'] = ("command line", nargs)
              if nargs is not None:
                  return []
  
          return nargs
  
      def get_cmdline_options(self):
          """Return a '{cmd: {opt:val}}' map of all command-line options
  
          Option names are all long, but do not include the leading '--', and
          contain dashes rather than underscores.  If the option doesn't take
          an argument (e.g. '--quiet'), the 'val' is 'None'.
  
          Note that options provided by config files are intentionally excluded.
          """
  
          d = {}
  
          for cmd, opts in self.command_options.items():
  
              for opt, (src, val) in opts.items():
  
                  if src != "command line":
                      continue
  
                  opt = opt.replace('_', '-')
  
                  if val == 0:
                      cmdobj = self.get_command_obj(cmd)
                      neg_opt = self.negative_opt.copy()
                      neg_opt.update(getattr(cmdobj, 'negative_opt', {}))
                      for neg, pos in neg_opt.items():
                          if pos == opt:
                              opt = neg
                              val = None
                              break
                      else:
                          raise AssertionError("Shouldn't be able to get here")
  
                  elif val == 1:
                      val = None
  
                  d.setdefault(cmd, {})[opt] = val
  
          return d
  
      def iter_distribution_names(self):
          """Yield all packages, modules, and extension names in distribution"""
  
          for pkg in self.packages or ():
              yield pkg
  
          for module in self.py_modules or ():
              yield module
  
          for ext in self.ext_modules or ():
              if isinstance(ext, tuple):
                  name, buildinfo = ext
              else:
                  name = ext.name
              if name.endswith('module'):
                  name = name[:-6]
              yield name
  
      def handle_display_options(self, option_order):
          """If there were any non-global "display-only" options
          (--help-commands or the metadata display options) on the command
          line, display the requested info and return true; else return
          false.
          """
          import sys
  
          if self.help_commands:
              return _Distribution.handle_display_options(self, option_order)
  
          # Stdout may be StringIO (e.g. in tests)
          if not isinstance(sys.stdout, io.TextIOWrapper):
              return _Distribution.handle_display_options(self, option_order)
  
          # Don't wrap stdout if utf-8 is already the encoding. Provides
          #  workaround for #334.
          if sys.stdout.encoding.lower() in ('utf-8', 'utf8'):
              return _Distribution.handle_display_options(self, option_order)
  
          # Print metadata in UTF-8 no matter the platform
          encoding = sys.stdout.encoding
          errors = sys.stdout.errors
          newline = sys.platform != 'win32' and '\n' or None
          line_buffering = sys.stdout.line_buffering
  
          sys.stdout = io.TextIOWrapper(
              sys.stdout.detach(), 'utf-8', errors, newline, line_buffering)
          try:
              return _Distribution.handle_display_options(self, option_order)
          finally:
              sys.stdout = io.TextIOWrapper(
                  sys.stdout.detach(), encoding, errors, newline, line_buffering)
  
  
  class DistDeprecationWarning(SetuptoolsDeprecationWarning):
      """Class for warning about deprecations in dist in
      setuptools. Not ignored by default, unlike DeprecationWarning."""
  