repack-deb.sh

#!/bin/sh -eu

while [ ${#} -gt 1 ]; do
    key="${1}"
    case "${key}" in
        -n|--name)
            NAME="${2}"
            shift
        ;;
        -a|--architecture)
            ARCHITECTURE="${2}"
            shift
        ;;
        -v|--version)
            VERSION="${2}"
            shift
        ;;
        -d|--distribution)
            DISTRIBUTION="${2}"
            shift
        ;;
        *)
            break
        ;;
    esac
    shift
done

if [ "${#}" -eq 0 ]; then
    echo 'Usage: repack-deb [OPTION]... PACKAGE [OUTDIR]'
    echo
    echo '  -n, --name          name of package e.g. "my-package" (default = unchanged)'
    echo '  -a, --architecture  architecture for package e.g. "amd64" (idefault = unchanged)'
    echo '  -v, --version       version for package e.g. "1.0.2" (default = unchanged)'
    echo '  -d, --distribution  distribution for package e.g. "precise" (default = unchanged)'
    echo
    exit 1
fi

die() {
    echo "ERROR: ${1}"
    exit 1
}

[ -f "${1}" ] || die "File ${1} not found"

OUT_DIR="${2:-.}"
[ -d "${OUT_DIR}" ] || die "${OUT_DIR} is not a directory"

NAME="${NAME:-"$(dpkg -f "${1}" Package)"}"
ARCHITECTURE="${ARCHITECTURE:-"$(dpkg -f "${1}" Architecture)"}"
VERSION="${VERSION:-"$(dpkg -f "${1}" Version)"}"
DISTRIBUTION="${DISTRIBUTION:-""}"

if [ -n "${DISTRIBUTION}" ] && [ "${DISTRIBUTION}" != 'all' ]; then
    VERSION="${VERSION}~${DISTRIBUTION}1"
fi

OUT_FILE="${OUT_DIR}/${NAME}_${VERSION}_${ARCHITECTURE}.deb"
[ ! -e "${OUT_FILE}" ] || die "${OUT_FILE} already exists"

WORKING_DIR="$(mktemp --directory)"
trap 'rm -rf "${WORKING_DIR}"' EXIT

dpkg-deb -x "${1}" "${WORKING_DIR}"
dpkg-deb -e "${1}" "${WORKING_DIR}/DEBIAN"

sed -i "s/^Package: .*/Package: ${NAME}/" "${WORKING_DIR}/DEBIAN/control"
sed -i "s/^Version: .*/Version: ${VERSION}/" "${WORKING_DIR}/DEBIAN/control"
sed -i "s/^Architecture: .*/Architecture: ${ARCHITECTURE}/" "${WORKING_DIR}/DEBIAN/control"

dpkg-deb -b "${WORKING_DIR}" "${OUT_FILE}"

rm -fr "${WORKING_DIR}"