code: def _symlink_in_files(in_files, data):
      
      work_dir = utils.safe_makedir(os.path.join(data["dirs"]["work"], "align_prep"))
      out = []
      for in_file in in_files:
          out_file = os.path.join(work_dir, "%s_%s" % (dd.get_sample_name(data), os.path.basename(in_file)))
          out_file = _symlink_or_copy_grabix(in_file, out_file, data)
          out.append(out_file)
      return out
docs: Symlink (shared filesystem) or copy (CWL) inputs into align_prep directory.