text: import logging
  import os
  from typing import Optional
  
  from pip._vendor.pep517.wrappers import Pep517HookCaller
  
  from pip._internal.utils.subprocess import runner_with_spinner_message
  
  logger = logging.getLogger(__name__)
  
  
  def build_wheel_pep517(
      name,  # type: str
      backend,  # type: Pep517HookCaller
      metadata_directory,  # type: str
      tempd,  # type: str
  ):
      # type: (...) -> Optional[str]
      """Build one InstallRequirement using the PEP 517 build process.
  
      Returns path to wheel if successfully built. Otherwise, returns None.
      """
      assert metadata_directory is not None
      try:
          logger.debug('Destination directory: %s', tempd)
  
          runner = runner_with_spinner_message(
              f'Building wheel for {name} (PEP 517)'
          )
          with backend.subprocess_runner(runner):
              wheel_name = backend.build_wheel(
                  tempd,
                  metadata_directory=metadata_directory,
              )
      except Exception:
          logger.error('Failed building wheel for %s', name)
          return None
      return os.path.join(tempd, wheel_name)
  