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#!/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 $
source "${PORTAGE_BIN_PATH:-/usr/lib/portage/bin}"/isolated-functions.sh
if [[ -z $1 ]] ; then
vecho "${0##*/}: at least one argument needed" 1>&2
exit 1
fi
# setup compression stuff
PORTAGE_COMPRESS=${PORTAGE_COMPRESS-bzip2}
[[ -z ${PORTAGE_COMPRESS} ]] && exit 0
if [[ ${PORTAGE_COMPRESS_FLAGS+set} != "set" ]] ; then
case ${PORTAGE_COMPRESS} in
bzip2|gzip) PORTAGE_COMPRESS_FLAGS="-9";;
esac
fi
case $1 in
--suffix)
if [[ ! -e ${T}/.ecompress.suffix ]] ; then
set -e
tmpdir="${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} ${PORTAGE_COMPRESS_FLAGS} compressme > /dev/null
suffix=$(ls compressme*)
suffix=${suffix#compressme}
cd /
rm -rf "${tmpdir}"
echo "${suffix}" > "${T}/.ecompress.suffix"
fi
cat "${T}/.ecompress.suffix"
;;
--bin)
echo "${PORTAGE_COMPRESS} ${PORTAGE_COMPRESS_FLAGS}"
;;
*)
# If a compressed version of the file already exists, simply
# delete it so that the compressor doesn't whine (bzip2 will
# complain and skip, gzip will prompt for input)
suffix=$(ecompress --suffix)
[[ -n ${suffix} ]] && echo -n "${@/%/${suffix}$'\001'}" | \
tr '\001' '\000' | ${XARGS} -0 rm -f
# Finally, let's actually do some real work
exec "${PORTAGE_COMPRESS}" ${PORTAGE_COMPRESS_FLAGS} "$@"
;;
esac
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