anchor.diff:  
   echo Warning: ignoring invalid command line option `%1`.
   
  -:arg-ok
   :arg-ok
   shift
   goto next-arg
  
positive.code: goto exit
  
  :exit
  cd "%~dp0"
  goto :EOF
  
negative.code: 
  @rem Ensure environment properly setup
  if not defined SHIELDBATTERY_PATH goto env-error
  
  @rem Store %~dp0 because it can change after we call things
  set scriptroot=%~dp0
  
  @rem Process arguments.
  set config=Release
  