docs: def create_tar(self):
          """Create a tar file with all the files."""
  
          def add_file_to_tar(tar, orig_fn, new_fn, func=None):
              tf = tarfile.TarInfo(name=new_fn)
              with open(orig_fn) as f:
                  tfs = f.read()
  
              if func is not None:
                  tfs = func(tfs)
              tf.size = len(tfs)
              tfs = io.BytesIO(tfs.encode('utf8'))
              tar.addfile(tarinfo=tf, fileobj=tfs)
  
          def add_text_to_tar(tar, new_fn, text, func=None):
              tf = tarfile.TarInfo(name=new_fn)
              if func is not None:
                  text = func(text)
              tf.size = len(text)
              tfs = io.BytesIO(text.encode('utf8'))
              tar.addfile(tarinfo=tf, fileobj=tfs)
  
          def strip_lines(text):
              text = text.replace("\t", " ")
              while text.find("  ") != -1:
                  text = text.replace("  ", " ")
              lines = [x.strip() for x in text.strip().split("\n")]
              return "\n".join(lines) + "\n"
  
          tar = tarfile.TarFile(self._tar_fn, "w")
          for i in range(len(self.bams)):
              roc_fn = self.bams[i].roc_fn()
              t_roc_fn = os.path.basename(roc_fn)
  
              gp_fn = self.bams[i].gp_fn()
              t_gp_fn = os.path.basename(gp_fn)
  
              svg_fn = self.bams[i].svg_fn()
              t_svg_fn = os.path.basename(svg_fn)
  
              add_file_to_tar(tar, roc_fn, t_roc_fn)
              add_file_to_tar(
                  tar, gp_fn, t_gp_fn, lambda x: strip_lines(x.replace(roc_fn, t_roc_fn).replace(svg_fn, t_svg_fn))
              )
  
          gp_fn = self._gp_fn
          t_gp_fn = os.path.basename(gp_fn)
          svg_dir = os.path.join(self.panel_dir, "graphics") + "/"
          roc_dir = os.path.join(self.panel_dir, "roc") + "/"
          add_file_to_tar(tar, gp_fn, t_gp_fn, lambda x: strip_lines(x.replace(svg_dir, "").replace(roc_dir, "")))
  
          makefile = [
              ".PHONY: all",
              "all:",
              "\tgnuplot *.gp",
              "clean:",
              "\trm -f *.svg",
              "",
          ]
          add_text_to_tar(tar, "Makefile", "\n".join(makefile))