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#!/bin/bash
readonly OUT_DIR=$1
readonly IMG_NAME=$2
readonly PKGLIST=$(readlink -f $3)
# if an optional .torrent file is desired, see ./TORRENT_METADATA.sample
[[ -f ./TORRENT_METADATA ]] && source ./TORRENT_METADATA
which mktorrent &> /dev/null && readonly HAS_MKTORRENT=1 || readonly HAS_MKTORRENT=0
which rhash &> /dev/null && readonly HAS_RHASH=1 || readonly HAS_RHASH=0
[[ -n "${TORRENT_ANNOUNCE_URL}" ]] && readonly SHOULD_MKTORRENT=${HAS_MKTORRENT} || \
readonly SHOULD_MKTORRENT=0
[[ -n "${ISOS_URL}" ]] && readonly SIG_URL=${ISOS_URL}/$(basename ${OUT_DIR})/${IMG_NAME}.sig
[[ -n "${ISOS_URL}" ]] && readonly SIGURL_MSG="GPG signature is expected to be at: ${SIG_URL}"
readonly ISO_HOST_PATH=$(echo "$(basename ${OUT_DIR})/${IMG_NAME}" | sed 's|\s|%20|')
readonly WEBSEEDS_CSV=$(echo $urls | sed -E "s|([^ ]+)|\1${ISO_HOST_PATH}|g" | tr ' ' ',')
readonly PKGLIST_SUCCESS_MSG="\t=> copied $(basename ${PKGLIST})"
readonly SHA512SUMS_SUCCESS_MSG="\t=> SHA512SUMS appended"
readonly WHIIRLPOOLSUMS_SUCCESS_MSG="\t=> WHIRLPOOLSUMS appended"
readonly MAGNET_SUCCESS_MSG="\t=> ${IMG_NAME}.magnet saved"
readonly TORRENT_SUCCESS_MSG="\t=> ${IMG_NAME}.torrent saved\n${SIGURL_MSG}"
MakeMetadata()
{
# copy package lists and create checksums and optional torrent file
cp ${PKGLIST} . && echo -e ${PKGLIST_SUCCESS_MSG}
rhash --sha512 "${IMG_NAME}" >> SHA512SUMS && echo -e ${SHA512SUMS_SUCCESS_MSG}
rhash --whirlpool "${IMG_NAME}" >> WHIRLPOOLSUMS && echo -e ${WHIIRLPOOLSUMS_SUCCESS_MSG}
rhash --magnet "${IMG_NAME}" > "${IMG_NAME}.magnet" && echo -e ${MAGNET_SUCCESS_MSG}
(( ${SHOULD_MKTORRENT} )) && MakeTorrent && echo -e ${TORRENT_SUCCESS_MSG}
sort SHA512SUMS --key=2 --output=SHA512SUMS
sort WHIRLPOOLSUMS --key=2 --output=WHIRLPOOLSUMS
}
MakeTorrent()
{
# create torrent file
mktorrent --announce=${TORRENT_ANNOUNCE_URL} \
--comment="${TORRENT_COMMENT}${SIG_URL}" \
$([[ -n "${WEBSEEDS_CSV}" ]] && echo "--web-seed=${WEBSEEDS_CSV}") \
--piece-length=20 --no-date --verbose \
"${IMG_NAME}"
}
if (( ${HAS_RHASH} )) && (( $# == 3 ))
then echo "[mkmetadata]: preparing metadata"
pushd ${OUT_DIR} > /dev/null
MakeMetadata
popd > /dev/null
fi
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