anchor.diff:  
   rem  ------------------------------------------------------------------------
   
  +:distclean
  +
  +call :clean
  +
  +rem  Delete downloaded files and the directory where they were put
  +
  +call :deleteFile %PackageList%
  +call :deleteFile %PackagePath%
  +call :deleteDir  %GdalAdmin_InstallDir%
  +
  +goto :eof
  +
  +rem  ------------------------------------------------------------------------
  +
   :deleteFile
   
   if exist "%~1" (
  
positive.code: if "%~1" == "get"       set Action=get
  if "%~1" == "update"    set Action=update
  if "%~1" == "clean"     set Action=clean
  if "%~1" == "help"      set Action=help
  if "%~1" == ""          set Action=help
  
  
negative.code: echo   update    -- update the local list of available GDAL packages with the
  echo                current list in the svn repos, then do the "get" action
  echo   clean     -- remove all unpacked files
  echo   distclean -- Same as "clean" action, plus remove all downloaded files
  echo   help      -- display this message (default)
  
  goto :eof
  