#!/bin/sh

# Utility to convert a debian package to .tar.gz.
# Part of the script adapted from rpm2targz script from Slackware
# By Tushar Teredesai <tush@yahoo.com>

if [ "$1" = "" ]
then
	echo "$0:  Converts a debian package to a GNU tar+gz format."
	echo "Also preserves the debian control scripts."
	echo "Usage: $0 <file.deb>"
	exit 1;
fi

for i in $*
do

	# Output progress only if multiple files are being converted.
	if [ ! "$1" = "$*" ]
	then
		echo "Processing file: $i"
	fi

	# Tmp dir to store intermediate files
	tmpdir=/tmp/deb2targz.$$
	# Better be safe than sorry
	rm -rf ${tmpdir}
	# Create tmp directory
	mkdir $tmpdir || exit 1
	# Xtract the data portion
	ar p ${i} data.tar.gz | gunzip > ${tmpdir}/data.tar
	# Xtract the data portion
	ar p ${i} control.tar.gz | gunzip > ${tmpdir}/control.tar
	# Merge the two tar balls
	tar --concatenate --file=${tmpdir}/data.tar ${tmpdir}/control.tar
	# Gzip it.
	cat ${tmpdir}/data.tar | gzip -9 > `basename ${i} .deb`.tar.gz || exit 1
	# Remove the tmp files
	rm -rf ${tmpdir}

done