text: import os
  import platform
  import re
  import sys
  import warnings
  
  
  if sys.version_info[:2] < (3, 5):
      raise RuntimeError("Python version >= 3.5 required.")
  
  
  # Hack to silence atexit traceback in some Python versions
  try:
      import multiprocessing
  except ImportError:
      pass
  
  from setuptools import setup, __version__ as _setuptools_version
  
  from distutils.cmd import Command
  from distutils.command.build_ext import build_ext
  from distutils.errors import CCompilerError, DistutilsOptionError
  from distutils.errors import DistutilsPlatformError, DistutilsExecError
  from distutils.core import Extension
  
  _HAVE_SPHINX = True
  try:
      from sphinx.cmd import build as sphinx
  except ImportError:
      try:
          import sphinx
      except ImportError:
          _HAVE_SPHINX = False
  
  version = "4.0.dev0"
  
  f = open("README.rst")
  try:
      try:
          readme_content = f.read()
      except:
          readme_content = ""
  finally:
      f.close()
  
  # PYTHON-654 - Clang doesn't support -mno-fused-madd but the pythons Apple
  # ships are built with it. This is a problem starting with Xcode 5.1
  # since clang 3.4 errors out when it encounters unrecognized compiler
  # flags. This hack removes -mno-fused-madd from the CFLAGS automatically
  # generated by distutils for Apple provided pythons, allowing C extension
  # builds to complete without error. The inspiration comes from older
  # versions of distutils.sysconfig.get_config_vars.
  if sys.platform == 'darwin' and 'clang' in platform.python_compiler().lower():
      from distutils.sysconfig import get_config_vars
      res = get_config_vars()
      for key in ('CFLAGS', 'PY_CFLAGS'):
          if key in res:
              flags = res[key]
              flags = re.sub('-mno-fused-madd', '', flags)
              res[key] = flags
  
  
  class test(Command):
      description = "run the tests"
  
      user_options = [
          ("test-module=", "m", "Discover tests in specified module"),
          ("test-suite=", "s",
           "Test suite to run (e.g. 'some_module.test_suite')"),
          ("failfast", "f", "Stop running tests on first failure or error"),
          ("xunit-output=", "x",
           "Generate a results directory with XUnit XML format")
      ]
  
      def initialize_options(self):
          self.test_module = None
          self.test_suite = None
          self.failfast = False
          self.xunit_output = None
  
      def finalize_options(self):
          if self.test_suite is None and self.test_module is None:
              self.test_module = 'test'
          elif self.test_module is not None and self.test_suite is not None:
              raise DistutilsOptionError(
                  "You may specify a module or suite, but not both"
              )
  
      def run(self):
          # Installing required packages, running egg_info and build_ext are
          # part of normal operation for setuptools.command.test.test
          if self.distribution.install_requires:
              self.distribution.fetch_build_eggs(
                  self.distribution.install_requires)
          if self.distribution.tests_require:
              self.distribution.fetch_build_eggs(self.distribution.tests_require)
          if self.xunit_output:
              self.distribution.fetch_build_eggs(["unittest-xml-reporting"])
          self.run_command('egg_info')
          build_ext_cmd = self.reinitialize_command('build_ext')
          build_ext_cmd.inplace = 1
          self.run_command('build_ext')
  
          # Construct a TextTestRunner directly from the unittest imported from
          # test, which creates a TestResult that supports the 'addSkip' method.
          # setuptools will by default create a TextTestRunner that uses the old
          # TestResult class.
          from test import unittest, PymongoTestRunner, test_cases
          if self.test_suite is None:
              all_tests = unittest.defaultTestLoader.discover(self.test_module)
              suite = unittest.TestSuite()
              suite.addTests(sorted(test_cases(all_tests),
                                    key=lambda x: x.__module__))
          else:
              suite = unittest.defaultTestLoader.loadTestsFromName(
                  self.test_suite)
          if self.xunit_output:
              from test import PymongoXMLTestRunner
              runner = PymongoXMLTestRunner(verbosity=2, failfast=self.failfast,
                                            output=self.xunit_output)
          else:
              runner = PymongoTestRunner(verbosity=2, failfast=self.failfast)
          result = runner.run(suite)
          sys.exit(not result.wasSuccessful())
  
  
  class doc(Command):
  
      description = "generate or test documentation"
  
      user_options = [("test", "t",
                       "run doctests instead of generating documentation")]
  
      boolean_options = ["test"]
  
      def initialize_options(self):
          self.test = False
  
      def finalize_options(self):
          pass
  
      def run(self):
  
          if not _HAVE_SPHINX:
              raise RuntimeError(
                  "You must install Sphinx to build or test the documentation.")
  
          if self.test:
              path = os.path.join(
                  os.path.abspath('.'), "doc", "_build", "doctest")
              mode = "doctest"
          else:
              path = os.path.join(
                  os.path.abspath('.'), "doc", "_build", version)
              mode = "html"
  
              try:
                  os.makedirs(path)
              except:
                  pass
  
          sphinx_args = ["-E", "-b", mode, "doc", path]
  
          # sphinx.main calls sys.exit when sphinx.build_main exists.
          # Call build_main directly so we can check status and print
          # the full path to the built docs.
          if hasattr(sphinx, 'build_main'):
              status = sphinx.build_main(sphinx_args)
          else:
              status = sphinx.main(sphinx_args)
  
          if status:
              raise RuntimeError("documentation step '%s' failed" % (mode,))
  
          sys.stdout.write("\nDocumentation step '%s' performed, results here:\n"
                           "   %s/\n" % (mode, path))
  
  
  if sys.platform == 'win32':
      # distutils.msvc9compiler can raise an IOError when failing to
      # find the compiler
      build_errors = (CCompilerError, DistutilsExecError,
                      DistutilsPlatformError, IOError)
  else:
      build_errors = (CCompilerError, DistutilsExecError, DistutilsPlatformError)
  
  
  class custom_build_ext(build_ext):
      """Allow C extension building to fail.
  
      The C extension speeds up BSON encoding, but is not essential.
      """
  
      warning_message = """
  ********************************************************************
  WARNING: %s could not
  be compiled. No C extensions are essential for PyMongo to run,
  although they do result in significant speed improvements.
  %s
  
  Please see the installation docs for solutions to build issues:
  
  https://pymongo.readthedocs.io/en/stable/installation.html
  
  Here are some hints for popular operating systems:
  
  If you are seeing this message on Linux you probably need to
  install GCC and/or the Python development package for your
  version of Python.
  
  Debian and Ubuntu users should issue the following command:
  
      $ sudo apt-get install build-essential python-dev
  
  Users of Red Hat based distributions (RHEL, CentOS, Amazon Linux,
  Oracle Linux, Fedora, etc.) should issue the following command:
  
      $ sudo yum install gcc python-devel
  
  If you are seeing this message on Microsoft Windows please install
  PyMongo using pip. Modern versions of pip will install PyMongo
  from binary wheels available on pypi. If you must install from
  source read the documentation here:
  
  https://pymongo.readthedocs.io/en/stable/installation.html#installing-from-source-on-windows
  
  If you are seeing this message on macOS / OSX please install PyMongo
  using pip. Modern versions of pip will install PyMongo from binary
  wheels available on pypi. If wheels are not available for your version
  of macOS / OSX, or you must install from source read the documentation
  here:
  
  https://pymongo.readthedocs.io/en/stable/installation.html#osx
  ********************************************************************
  """
  
      def run(self):
          try:
              build_ext.run(self)
          except DistutilsPlatformError:
              e = sys.exc_info()[1]
              sys.stdout.write('%s\n' % str(e))
              warnings.warn(self.warning_message % ("Extension modules",
                                                    "There was an issue with "
                                                    "your platform configuration"
                                                    " - see above."))
  
      def build_extension(self, ext):
          name = ext.name
          try:
              build_ext.build_extension(self, ext)
          except build_errors:
              e = sys.exc_info()[1]
              sys.stdout.write('%s\n' % str(e))
              warnings.warn(self.warning_message % ("The %s extension "
                                                    "module" % (name,),
                                                    "The output above "
                                                    "this warning shows how "
                                                    "the compilation "
                                                    "failed."))
  
  ext_modules = [Extension('bson._cbson',
                           include_dirs=['bson'],
                           sources=['bson/_cbsonmodule.c',
                                    'bson/time64.c',
                                    'bson/buffer.c',
                                    'bson/encoding_helpers.c']),
                 Extension('pymongo._cmessage',
                           include_dirs=['bson'],
                           sources=['pymongo/_cmessagemodule.c',
                                    'bson/buffer.c'])]
  
  # PyOpenSSL 17.0.0 introduced support for OCSP. 17.1.0 introduced
  # a related feature we need. 17.2.0 fixes a bug
  # in set_default_verify_paths we should really avoid.
  # service_identity 18.1.0 introduced support for IP addr matching.
  pyopenssl_reqs = ["pyopenssl>=17.2.0", "requests<3.0.0", "service_identity>=18.1.0"]
  
  extras_require = {
      'encryption': ['pymongocrypt<2.0.0'],
      'ocsp': pyopenssl_reqs,
      'snappy': ['python-snappy'],
      'zstd': ['zstandard'],
      'aws': ['pymongo-auth-aws<2.0.0'],
      'srv': ["dnspython>=1.16.0,<2.0.0"],
  }
  
  # GSSAPI extras
  if sys.platform == 'win32':
      extras_require['gssapi'] = ["winkerberos>=0.5.0"]
  else:
      extras_require['gssapi'] = ["pykerberos"]
  
  extra_opts = {
      "packages": ["bson", "pymongo", "gridfs"]
  }
  
  if "--no_ext" in sys.argv:
      sys.argv.remove("--no_ext")
  elif (sys.platform.startswith("java") or
        sys.platform == "cli" or
        "PyPy" in sys.version):
      sys.stdout.write("""
  *****************************************************\n
  The optional C extensions are currently not supported\n
  by this python implementation.\n
  *****************************************************\n
  """)
  else:
      extra_opts['ext_modules'] = ext_modules
  
  setup(
      name="pymongo",
      version=version,
      description="Python driver for MongoDB <http://www.mongodb.org>",
      long_description=readme_content,
      author="Mike Dirolf",
      author_email="mongodb-user@googlegroups.com",
      maintainer="Bernie Hackett",
      maintainer_email="bernie@mongodb.com",
      url="http://github.com/mongodb/mongo-python-driver",
      keywords=["mongo", "mongodb", "pymongo", "gridfs", "bson"],
      install_requires=[],
      license="Apache License, Version 2.0",
      python_requires=">=3.5",
      classifiers=[
          "Development Status :: 5 - Production/Stable",
          "Intended Audience :: Developers",
          "License :: OSI Approved :: Apache Software License",
          "Operating System :: MacOS :: MacOS X",
          "Operating System :: Microsoft :: Windows",
          "Operating System :: POSIX",
          "Programming Language :: Python :: 3",
          "Programming Language :: Python :: 3 :: Only",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Programming Language :: Python :: 3.9",
          "Programming Language :: Python :: Implementation :: CPython",
          "Programming Language :: Python :: Implementation :: PyPy",
          "Topic :: Database"],
      cmdclass={"build_ext": custom_build_ext,
                "doc": doc,
                "test": test},
      extras_require=extras_require,
      **extra_opts
  )
  