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#!/bin/bash
#name=pkgthing program finder
#version=???
#  Copyright (C) 2009 Luke Shumaker
#  
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
#  
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#  General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program;  see the file COPYING.
#  If not, see <http://www.gnu.org/licenses>.

# 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