--- a/lib/python3.8/site-packages/setuptools/dist.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1020 +0,0 @@
-# -*- 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 six
-from setuptools.extern import packaging
-from setuptools.extern import ordered_set
-from setuptools.extern.six.moves import map, filter, filterfalse
-
-from . import SetuptoolsDeprecationWarning
-
-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()
-
-    if six.PY2:
-        def write_field(key, value):
-            file.write("%s: %s\n" % (key, self._encode_field(value)))
-    else:
-        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):
-        raise DistutilsSetupError(
-            "%r must be importable 'module:attrs' string (got %r)"
-            % (attr, value)
-        )
-
-
-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):
-        raise DistutilsSetupError(
-            "%r must be a list of strings (got %r)" % (attr, value)
-        )
-
-
-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):
-        raise DistutilsSetupError(
-            "'extras_require' must be a dictionary whose values are "
-            "strings or lists of strings containing valid project/version "
-            "requirement specifiers."
-        )
-
-
-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))
-
-
-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))
-
-
-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)
-
-
-def check_test_suite(dist, attr, value):
-    if not isinstance(value, six.string_types):
-        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, six.string_types):
-            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)
-
-        if isinstance(self.metadata.version, numbers.Number):
-            # Some people apparently take "version number" too literally :)
-            self.metadata.version = str(self.metadata.version)
-
-        if self.metadata.version is not None:
-            try:
-                ver = packaging.version.Version(self.metadata.version)
-                normalized_version = str(ver)
-                if self.metadata.version != normalized_version:
-                    warnings.warn(
-                        "Normalizing '%s' to '%s'" % (
-                            self.metadata.version,
-                            normalized_version,
-                        )
-                    )
-                    self.metadata.version = normalized_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." % self.metadata.version
-                )
-        self._finalize_requires()
-
-    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 = 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 setuptools.extern.six.moves.configparser import ConfigParser
-
-        # Ignore install directory options if we have a venv
-        if not six.PY2 and 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.readfp if six.PY2 else 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 = self._try_str(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 msg:
-                    raise DistutilsOptionError(msg)
-
-    @staticmethod
-    def _try_str(val):
-        """
-        On Python 2, much of distutils relies on string values being of
-        type 'str' (bytes) and not unicode text. If the value can be safely
-        encoded to bytes using the default encoding, prefer that.
-
-        Why the default encoding? Because that value can be implicitly
-        decoded back to text if needed.
-
-        Ref #1653
-        """
-        if not six.PY2:
-            return val
-        try:
-            return val.encode()
-        except UnicodeEncodeError:
-            pass
-        return val
-
-    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, six.string_types)
-                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 msg:
-                raise DistutilsOptionError(msg)
-
-    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.
-        """
-        hook_key = 'setuptools.finalize_distribution_options'
-
-        def by_order(hook):
-            return getattr(hook, 'order', 0)
-        eps = pkg_resources.iter_entry_points(hook_key)
-        for ep in sorted(eps, key=by_order):
-            ep.load()(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:
-            raise DistutilsSetupError(
-                "%s: No such distribution setting" % name
-            )
-        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:
-            raise DistutilsSetupError(
-                "%s: No such distribution setting" % name
-            )
-        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 six.PY2 or 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."""