#!/usr/bin/env python3
import os
import re
import shutil
import sys
from io import open

from setuptools import find_packages, setup

CURRENT_PYTHON = sys.version_info[:2]
REQUIRED_PYTHON = (3, 5)

# This check and everything above must remain compatible with Python 2.7.
if CURRENT_PYTHON < REQUIRED_PYTHON:
    sys.stderr.write("""
==========================
Unsupported Python version
==========================

This version of Django REST Framework requires Python {}.{}, but you're trying
to install it on Python {}.{}.

This may be because you are using a version of pip that doesn't
understand the python_requires classifier. Make sure you
have pip >= 9.0 and setuptools >= 24.2, then try again:

    $ python -m pip install --upgrade pip setuptools
    $ python -m pip install djangorestframework

This will install the latest version of Django REST Framework which works on
your version of Python. If you can't upgrade your pip (or Python), request
an older version of Django REST Framework:

    $ python -m pip install "django<3.10"
""".format(*(REQUIRED_PYTHON + CURRENT_PYTHON)))
    sys.exit(1)


def read(f):
    return open(f, 'r', encoding='utf-8').read()


def get_version(package):
    """
    Return package version as listed in `__version__` in `init.py`.
    """
    init_py = open(os.path.join(package, '__init__.py')).read()
    return re.search("__version__ = ['\"]([^'\"]+)['\"]", init_py).group(1)


version = get_version('rest_framework')


if sys.argv[-1] == 'publish':
    if os.system("pip freeze | grep twine"):
        print("twine not installed.\nUse `pip install twine`.\nExiting.")
        sys.exit()
    os.system("python setup.py sdist bdist_wheel")
    os.system("twine upload dist/*")
    print("You probably want to also tag the version now:")
    print("  git tag -a %s -m 'version %s'" % (version, version))
    print("  git push --tags")
    shutil.rmtree('dist')
    shutil.rmtree('build')
    shutil.rmtree('djangorestframework.egg-info')
    sys.exit()


setup(
    name='djangorestframework',
    version=version,
    url='https://www.django-rest-framework.org/',
    license='BSD',
    description='Web APIs for Django, made easy.',
    long_description=read('README.md'),
    long_description_content_type='text/markdown',
    author='Tom Christie',
    author_email='tom@tomchristie.com',  # SEE NOTE BELOW (*)
    packages=find_packages(exclude=['tests*']),
    include_package_data=True,
    install_requires=[],
    python_requires=">=3.5",
    zip_safe=False,
    classifiers=[
        'Development Status :: 5 - Production/Stable',
        'Environment :: Web Environment',
        'Framework :: Django',
        'Framework :: Django :: 1.11',
        'Framework :: Django :: 2.0',
        'Framework :: Django :: 2.1',
        'Framework :: Django :: 2.2',
        'Intended Audience :: Developers',
        'License :: OSI Approved :: BSD License',
        'Operating System :: OS Independent',
        'Programming Language :: Python',
        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.5',
        'Programming Language :: Python :: 3.6',
        'Programming Language :: Python :: 3.7',
        'Programming Language :: Python :: 3 :: Only',
        'Topic :: Internet :: WWW/HTTP',
    ]
)

# (*) Please direct queries to the discussion group, rather than to me directly
#     Doing so helps ensure your question is helpful to other users.
#     Queries directly to my email are likely to receive a canned response.
#
#     Many thanks for your understanding.

@@ -1682,16 +1682,207 @@
 wheel%22)%0A
+    if os.system(%22twine check dist/*%22):%0A        print(%22twine check failed. Packages might be outdated.%22)%0A        print(%22Try using %60pip install -U twine wheel%60.%5CnExiting.%22)%0A        sys.exit()%0A
     os.s

Add `twine check` to publish process (#6770)