find-i

#! /bin/bash

function usage {
    echo 1>&2 "Usage: $0 [-d] scriptname.bash"
    echo 1>&2 "-a - strip letters from end"
    echo 1>&2 "-d - print path to data directory"
    echo 1>&2 "-h - this message"
    exit "$@"
}    

while getopts 'adh' opt ; do
    case "$opt" in
	a) opt_a=1 ;;
	d) opt_d=1 ;;
	h) opt_h=1 ;;
	\?) usage 1 ;;
	*) echo "Can't happen" ; exit 1 ;;
    esac
done
shift $((OPTIND-1))

if [ "$opt_h" ] ; then
    usage
fi
if [ -z "$1" -o "$2" ] ; then
    usage 1
fi

NAME="$1"

case "$NAME" in
    *.bash) NAME="$(basename "$NAME" .bash)" ;;
    *.sh) NAME="$(basename "$NAME" .sh)" ;;
    *) :
esac

case "$NAME" in
    doit*-*)
	X=$(echo "$NAME" | sed -r -e 's/^doit([^-]+)-.*/\1/')
	SEP=
	;;
    doit*)
	X=$(echo "$NAME" | sed -e 's/^doit//')
	SEP=
	;;
    *)
	X=$(echo "$NAME" | sed -e 's/ /_/g')
	SEP=_
esac

if [ "$opt_a" ] ; then
    X=$(echo "$X" | sed -r -e 's/[a-z]+$//')
fi


if [ "$opt_d" ] ; then
    if [ -z "$X" ] ; then
	echo data
    else
	echo data/step$SEP$X
    fi
else
    echo $X
fi