#!/bin/bash

# option handling
case "$1" in
	-v|-q) volume=$1; prog=$2;;
	*) prog="$1";;
esac

# core
error() {
	echo "$0:$@"
	exit 1
}

checkList() {
	prog=$1
	src=$2
	file=$3
	sed -n "s/^\($prog\) \.* \(.*\)/\1\t\2/p" "$src/$file" |	\
	while read line; do
		_prg=`echo "$line" | cut -f 1`
		_pkg=`echo "$line" | cut -f 2`
		echo "\`$_prg' is in the $src package \`$_pkg'"
		if [ "$volume" == '-v' ]; then
			pkgthing search "$_pkg" "$src" | sed 's/^\(.\)/	\1/g'
		fi
	done
}

useVar() {
	var=$1
	val=$2
	case "$var" in
		\$name) _name="$val";;
		\$union) :;;
      		\$progs)
			checkList "$prog" "$_name" "$val"
			:;;
	esac
}

# parse files
for lst in *.lst; do
	_name='oops'
	while read line; do
		if [ -n "$line" ]; then
			case "$line" in
				\#*) :;; # comment, do nothing
				\$*) # setting a variable
					var=${line%%=*}
					val=${line#$var=}
					useVar "$var" "$val"
					:;;
				*) :;; # setting a source
			esac
		fi
	done < "$lst"
done