bin/ecompress

#!/bin/bash
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: prepman 5507 2007-01-10 04:22:27Z zmedico $

if [[ -z $1 ]] ; then
	echo "${0##*/}: at least one argument needed" 1>&2
	exit 1
fi

source "${PORTAGE_BIN_PATH:-/usr/lib/portage/bin}"/isolated-functions.sh

# setup compression stuff
PORTAGE_COMPRESS=${PORTAGE_COMPRESS:-bzip2}
if [[ -z ${PORTAGE_COMPRESS_FLAGS} ]] ; then
	case ${PORTAGE_COMPRESS} in
		bzip2|gzip)  PORTAGE_COMPRESS_FLAGS="-9";;
	esac
fi

case $1 in
	--suffix)
		set -e
		tmpdir="${T}"/.ecompress$$.${RANDOM}
		mkdir "${tmpdir}"
		cd "${tmpdir}"
		# we have to fill the file enough so that there is something
		# to compress as some programs will refuse to do compression
		# if it cannot actually compress the file
		echo {0..1000} > compressme
		${PORTAGE_COMPRESS} ${PORTAGE_COMPRESS_FLAGS} compressme
		suffix=$(ls compressme*)
		suffix=${suffix#compressme}
		cd /
		rm -rf "${tmpdir}"
		echo "${suffix}"
		;;
	--bin)
		echo "${PORTAGE_COMPRESS} ${PORTAGE_COMPRESS_FLAGS}"
		;;
	*)
		exec "${PORTAGE_COMPRESS}" ${PORTAGE_COMPRESS_FLAGS} "$@"
		;;
esac