#!/bin/sh

# {{{ Variables
TARGETS='updates security backports'
TARGET=
# }}}

# {{{ usage()
usage() {
cat <<EOH
USAGE: $(basename "$0") [OPTIONS]

Get updates for packages managed by apt

Options:
    -h  Shows this help
    -t  Target ($(echo "${TARGETS}" | sed 's/ / or /g'))
EOH
}
# }}}

# {{{ main()
while getopts "ht:" OPT ; do
    case "$OPT" in 
        h)
            usage
            exit 0
            ;;
        t)
            TARGET="$OPTARG"
            ;;
    esac
done

if [ -z "${TARGET}" ]; then
    printf "[ERR] Target is missing\n"
    usage
    exit 1
fi

if ! echo "${TARGET}" | egrep -q "^($(echo "${TARGETS}" | sed 's/ /|/g'))$"; then
    printf "[ERR] info '${TARGET}' not available in [$(echo "${TARGETS}" | sed 's/ /, /g')]\n"
    usage
    exit 1
fi

DISTRO=$(lsb_release -c -s)

case "${TARGET}" in
    updates)
        apt-get -s -o Debug::NoLocking=true upgrade | grep -c '^Inst'
        ;;
    security)
        apt-get -s -o Debug::NoLocking=true upgrade | egrep -c "^Inst [^ ]+ \[[^]]+\] \([^ ]+ .*(Debian-Security|${DISTRO}-security)"
        ;;
    backports)
        apt-get -s -o Debug::NoLocking=true upgrade | egrep -c "^Inst [^ ]+ \[[^]]+\] \([^ ]+ .*(Debian Backports|${DISTRO}-backports)"
        ;;
esac

exit 0
# }}}

# vim: foldmethod=marker foldlevel=0 foldenable