code: def setup_hook(config):
      
      metadata = config['metadata']
      if sys.platform == 'win32':
          requires = metadata.get('requires_dist', '').split('\n')
          metadata['requires_dist'] = "\n".join(requires)
      config['metadata'] = metadata
  
      metadata['version'] = str(version)
  
      # pbr's setup_hook replaces easy_install.get_script_args with
      # their own version, override_get_script_args, prefering simpler
      # scripts which are not aware of multi-version.
      # prevent that by doing the opposite.  it's a horrible hack
      # but we are in patching wars already...
      from pbr import packaging
  
      def my_get_script_args(*args, **kwargs):
          return _main_module()._orig_get_script_args(*args, **kwargs)
  
      packaging.override_get_script_args = my_get_script_args
      easy_install.get_script_args = my_get_script_args
  
      # another hack to allow setup from tarball.
      orig_get_version = packaging.get_version
  
      def my_get_version(package_name, pre_version=None):
          if package_name == 'ryu':
              return str(version)
          return orig_get_version(package_name, pre_version)
  
      packaging.get_version = my_get_version
docs: Filter config parsed from a setup.cfg to inject our defaults.