#!/bin/bash

set -e

usage() {
    echo >&2 "Usage: install-ion3-cfg [--remove] config-basename"
}

config_dir=/etc/X11/ion3
config_list=$config_dir/cfg_debian_ext.lua

action=add

while true; do
    case "$1" in
	-h|--help)
	    usage
	    exit 0
	    ;;
	--remove)
	    action=remove
	    ;;
	-*)
	    usage
	    exit 2
	    ;;
	*)
	    break
	    ;;
    esac
    shift
done

if [ $# -ne 1 ]; then
    usage
    exit 2
fi

name="$1"

case $action in
    add)
	if ! [ -f "$config_dir/$name.lua" ]; then
	    echo >&2 "$config_dir/$name.lua does not exist!"
	    exit 2
	fi
	if ! egrep -q "^ *dopath *\\( *\"$name\" *\\) *\$" \
	    "$config_list"; then
	    echo "dopath(\"$name\")" >> "$config_list"
	fi
	;;
    remove)
	sed -i -r -e "/^ *dopath *\\( *\"$name\" *\\) *\$/d" \
	    "$config_list"
	;;
esac