docs: def extract_tar(url, target_dir, additional_compression="", remove_common_prefix=False, overwrite=False):
      """ extract a targz and install to the target directory """
      try:
          if not os.path.exists(target_dir):
              os.makedirs(target_dir)
          tf = tarfile.TarFile.open(fileobj=download_to_bytesio(url))
          if not os.path.exists(target_dir):
              os.makedirs(target_dir)
          common_prefix = os.path.commonprefix(tf.getnames())
          if not common_prefix.endswith('/'):
              common_prefix += "/"
          for tfile in tf.getmembers():
              if remove_common_prefix:
                  tfile.name = tfile.name.replace(common_prefix, "", 1)
              if tfile.name != "":
                  target_path = os.path.join(target_dir, tfile.name)
                  if target_path != target_dir and os.path.exists(target_path):
                      if overwrite:
                          remove_path(target_path)
                      else:
                          continue
                  tf.extract(tfile, target_dir)
      except OSError:
          e = sys.exc_info()[1]
          raise ExtractException(str(e))
      except IOError:
          e = sys.exc_info()[1]
          raise ExtractException(str(e))