Bash, Getopts and functions

Helpful hint, if you have a bash script with a function calling getopts, i.e.

make_tarball() {
    local START=`get_start_time`
    ## declare some variables
.....
    local OPTARG OPTIND
    ## Parse the args
    while getopts "s:d:a:x:X:v" ARG
    do
	case $ARG in
	    s) SOURCE_PATH="$SOURCE_PATH $OPTARG"
		;;
....
        esac
   done

you MUST make OPTIND a local variable, or a second (third, etc) call to the function will fail, with OPTIND too large to see any of the arguments

blegh
A