#!/bin/sh
#
# Author: Martti Kuparinen <martti.kuparinen@iki.fi>
#
# $Id: up2date,v 1.3 2005-12-18 09:31:35 martti Exp $
#

URL1="ftp://ftp.funet.fi/pub/mirrors/ftp.slackware.com/pub/slackware-"
URL2="patches/packages"

OPT_L=
OPT_I=
OPT_V="10.2"
OPT_D="/tmp/slackware-${OPT_V}"

usage() {
    echo
    echo "Usage: `basename $0` {-l | -i} [-d dir] [-v version]"
    echo
    echo "  -l              Load updates"
    echo "  -i              Install updates"
    echo "  -d dir          Destination directory (default: ${OPT_D})"
    echo "  -v version      Slackware version to download (default: ${OPT_V})"
    echo
    echo "Example: Download and install all updates for Slackware 10.2"
    echo
    echo "# `basename $0` -l -d /tmp/slackware91 -v 10.2"
    echo "# `basename $0` -i -d /tmp/slackware91"
    echo
    exit 1
}

if [ ! -f /etc/slackware-version ]; then
    echo
    echo "ERROR: This tool is only for Slackware Linux"
    echo
    exit 1
fi

##
## MAIN
##
set -- `getopt d:ilv: ${*}`
if test ${?} != 0; then
    usage
fi
for i
do
    case "${i}" in
        -d)
            OPT_D="${2}"
            shift 2;;
        -i)
            OPT_I=1
            shift;;
        -l)
            OPT_L=1
            shift;;
        -v)
            OPT_V="${2}" 
            shift 2;;
        --)
            shift; break;;
    esac
done

[ -z "${OPT_L}" -a -z "${OPT_I}" ] && usage

echo "Getting list of installed packages"
(cd /var/adm/packages && ls | sed 's+-[0-9].*++' > /tmp/slack1.$$)

# Download the updates
if [ ! -z "${OPT_L}" ]; then
    [ -d "${OPT_D}" ] && echo "WARNING: ${OPT_D} already exists"
    mkdir -p "${OPT_D}" || exit 1
    cd "${OPT_D}" || exit 1

    echo "Downloading list of updates"
    echo "ls *.tgz"                                             |   \
        /usr/pkg/bin/ftp "${URL1}${OPT_V}/${URL2}/"             |   \
        grep '.tgz$'                                            |   \
        awk '{print $9}' > /tmp/slack2.$$

    echo "Downloading updates for installed packages"
    for i in `cat /tmp/slack2.$$`
    do
        N="`echo ${i} | sed 's+-[0-9].*++'`"
        if [ ! -z "`grep "^${N}\$" /tmp/slack1.$$`" ]; then
            echo -n "===> ${i}: "
            if [ -f "${i}" ]; then
                echo "Already downloaded"
            else
                echo "Downloading"
                /usr/pkg/bin/ftp "${URL1}${OPT_V}/${URL2}/${i}"
            fi
        fi
    done
    echo "Downloaded updates are now in ${OPT_D}"
fi

# Install the updates
if [ ! -z "${OPT_I}" ]; then
    cd "${OPT_D}" || exit 1
    for i in *.tgz
    do
        echo "Upgrading ${i}"
        upgradepkg "${i}"
    done
fi

rm -f /tmp/slack*.$$

echo "All done."