code: def add_dist_location(self, dist, name=None):
      
      self._ensure_unfrozen('Adding a distribution')
      bdist = DistributionHelper.distribution_from_path(dist)
      if bdist is None:
        raise self.InvalidDistribution('Could not find distribution at %s' % dist)
      self.add_distribution(bdist)
      self.add_requirement(bdist.as_requirement())
docs: Add a distribution by its location on disk.
  
      :param dist: The path to the distribution to add.
      :keyword name: (optional) The name of the distribution, should the dist directory alone be
        ambiguous.  Packages contained within site-packages directories may require specifying
        ``name``.
      :raises PEXBuilder.InvalidDistribution: When the path does not contain a matching distribution.
  
      PEX supports packed and unpacked .whl and .egg distributions, as well as any distribution
      supported by setuptools/pkg_resources.