** Run the specified TH1 script, if any, and returns the return code or TH_OK
** when there is no script.
*/
static int run_script(const char *zScript){
  if( !zScript ){
    return TH_OK; /* No script, return success. */
  }
  Th_FossilInit(0, 0); /* Make sure TH1 is ready. */
  Th_FossilInit(TH_INIT_DEFAULT); /* Make sure TH1 is ready. */
  return Th_Eval(g.interp, 0, zScript, -1);
}

/*
** Run the pre-transfer TH1 script, if any, and returns the return code.
*/
static int run_common_script(void){