text: import os
  import pathlib
  import re
  import sys
  
  from setuptools import Extension, setup
  
  if sys.version_info < (3, 6):
      raise RuntimeError("aiohttp 4.x requires Python 3.6+")
  
  
  NO_EXTENSIONS = bool(os.environ.get('AIOHTTP_NO_EXTENSIONS'))  # type: bool
  HERE = pathlib.Path(__file__).parent
  IS_GIT_REPO = (HERE / '.git').exists()
  
  
  if sys.implementation.name != "cpython":
      NO_EXTENSIONS = True
  
  
  if (IS_GIT_REPO and
          not (HERE / 'vendor/http-parser/README.md').exists()):
      print("Install submodules when building from git clone", file=sys.stderr)
      print("Hint:", file=sys.stderr)
      print("  git submodule update --init", file=sys.stderr)
      sys.exit(2)
  
  
  # NOTE: makefile cythonizes all Cython modules
  
  extensions = [Extension('aiohttp._websocket', ['aiohttp/_websocket.c']),
                Extension('aiohttp._http_parser',
                          ['aiohttp/_http_parser.c',
                           'vendor/http-parser/http_parser.c',
                           'aiohttp/_find_header.c'],
                          define_macros=[('HTTP_PARSER_STRICT', 0)],
                          ),
                Extension('aiohttp._frozenlist',
                          ['aiohttp/_frozenlist.c']),
                Extension('aiohttp._helpers',
                          ['aiohttp/_helpers.c']),
                Extension('aiohttp._http_writer',
                          ['aiohttp/_http_writer.c'])]
  
  
  txt = (HERE / 'aiohttp' / '__init__.py').read_text('utf-8')
  try:
      version = re.findall(r"^__version__ = '([^']+)'\r?$",
                           txt, re.M)[0]
  except IndexError:
      raise RuntimeError('Unable to determine version.')
  
  install_requires = [
      'attrs>=17.3.0',
      'chardet>=2.0,<4.0',
      'multidict>=4.5,<5.0',
      'async_timeout>=4.0a2,<5.0',
      'yarl>=1.0,<2.0',
      'idna-ssl>=1.0; python_version<"3.7"',
      'typing_extensions>=3.6.5',
  ]
  
  
  def read(f):
      return (HERE / f).read_text('utf-8').strip()
  
  
  args = dict(
      name='aiohttp',
      version=version,
      description='Async http client/server framework (asyncio)',
      long_description='\n\n'.join((read('README.rst'), read('CHANGES.rst'))),
      long_description_content_type="text/x-rst",
      classifiers=[
          'License :: OSI Approved :: Apache Software License',
          'Intended Audience :: Developers',
          'Programming Language :: Python',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: 3.8',
          'Development Status :: 5 - Production/Stable',
          'Operating System :: POSIX',
          'Operating System :: MacOS :: MacOS X',
          'Operating System :: Microsoft :: Windows',
          'Topic :: Internet :: WWW/HTTP',
          'Framework :: AsyncIO',
      ],
      author='Nikolay Kim',
      author_email='fafhrd91@gmail.com',
      maintainer=', '.join(('Nikolay Kim <fafhrd91@gmail.com>',
                            'Andrew Svetlov <andrew.svetlov@gmail.com>')),
      maintainer_email='aio-libs@googlegroups.com',
      url='https://github.com/aio-libs/aiohttp',
      project_urls={
          'Chat: Gitter': 'https://gitter.im/aio-libs/Lobby',
          'CI: Azure Pipelines': 'https://dev.azure.com/aio-libs/aiohttp/_build',
          'Coverage: codecov': 'https://codecov.io/github/aio-libs/aiohttp',
          'Docs: Changelog': 'https://docs.aiohttp.org/en/stable/changes.html',
          'Docs: RTD': 'https://docs.aiohttp.org',
          'GitHub: issues': 'https://github.com/aio-libs/aiohttp/issues',
          'GitHub: repo': 'https://github.com/aio-libs/aiohttp',
      },
      license='Apache 2',
      packages=['aiohttp'],
      python_requires='>=3.6',
      install_requires=install_requires,
      extras_require={
          'speedups': [
              'aiodns>=1.1',
              'Brotli',
              'cchardet',
          ],
      },
      include_package_data=True,
  )
  
  if not NO_EXTENSIONS:
      print("**********************")
      print("* Accellerated build *")
      print("**********************")
      setup(ext_modules=extensions, **args)
  else:
      print("*********************")
      print("* Pure Python build *")
      print("*********************")
      setup(**args)
  