#!/use/bin/bash

progname=`basename $0`
errs=

[ -z "${CHAT_BASEDIR}" ] && {
	echo "${progname}: CHAT_BASEDIR: variable not set" >&2
	errs="yes"
}

[ -z "${AWKPATH}" ] && {
	echo "${progname}: AWKPATH: variable not set" >&2
	errs="yes"
}

[ -n "${errs}" ] && exit 1

usage() {
	echo "usage: ${progname} [ -k key ] [ -p projection ] { -a | [ files... ] }" >&2
	exit 1
}

all=0
key=
projection=

while getopts ":ak:p:" opt
do
	case "${opt}" in
	a)
		all=1
		;;
	k)
		key="${OPTARG}"
		;;
	p)
		projection="${OPTARG}"
		;;
	\?)
		echo "${progname}: ${OPTARG}: invalid option" >&2
		errs="yes"
		;;
	esac
done

[ -n "${errs}" ] && usage

shift `expr ${OPTIND} - 1`
[ ${all} -eq 1 -a $# -ne 0 ] && usage

exec gawk -v all=${all} -v key="${key}" -v projection="${projection}" \
	-f "${CHAT_BASEDIR}/awklib/relsel.awk" $*