#!/bin/sh

set -e

if [ "$1" ] ; then
    desktop=$1
else
    desktop=gnome
fi

if [ "$2" ] ; then
    apttype=$2
else
    apttype=aptitude
fi

from=lenny
to=squeeze
mirror=http://ftp.skolelinux.org/debian

timestamp=$(date +%Y%m%d)

run_test() {
    exec < /dev/null > test-$timestamp-$from-$to-$desktop-$apttype.txt 2>&1
    set -x
    unset LANG
    tmpdir=chroot-$from-upgrade-$to-$desktop
    fuser -mv .
    debootstrap $from $tmpdir $mirror
    chroot $tmpdir $apttype update
    cat > $tmpdir/usr/sbin/policy-rc.d <<EOF
#!/bin/sh
exit 101
EOF
    chmod a+rx $tmpdir/usr/sbin/policy-rc.d
    exit_cleanup() {
	umount $tmpdir/proc
    }
    mount -t proc proc $tmpdir/proc
    trap exit_cleanup EXIT INT # Make sure proc is unmounted also on failure

    chroot $tmpdir $apttype -y install debconf-utils

    # Make sure tasksel autoselection trigger.  It need the test scripts
    # to return the correct answers.
    echo tasksel tasksel/desktop multiselect $desktop | \
	chroot $tmpdir debconf-set-selections

    # Include the desktop and laptop task
    for test in desktop laptop ; do
	cat > $tmpdir/usr/lib/tasksel/tests/$test <<EOF
#!/bin/sh
exit 2
EOF
        chmod a+rx $tmpdir/usr/lib/tasksel/tests/$test
    done

    DEBIAN_FRONTEND=noninteractive
    export DEBIAN_FRONTEND DEBIAN_PRIORITY
    cmd="$(chroot $tmpdir tasksel -t --new-install|sed 's/debconf-apt-progress -- //')"
    chroot $tmpdir $cmd

    echo
    echo "Packages installed in $from"
    echo "==============================="
    chroot $tmpdir dpkg -l|awk '/^.. / { print $1,$2,$3}'|grep -v Err

    echo
    echo deb $mirror $to main > $tmpdir/etc/apt/sources.list
    chroot $tmpdir $apttype update
    cat > /dev/null <<EOF

Creating /etc/udev/kernel-upgrade to implement
workaround for udev refusing to upgrade from Lenny to Squeeze.
See http://bugs.debian.org/549522, http://bugs.debian.org/566000 and
http://bugs.debian.org/571255 .

EOF
#    touch $tmpdir/etc/udev/kernel-upgrade
# Workaround for bug in apt-get
# No longer needed 2010-07-01, might be needed in the future
#    if [ apt-get = "$apttype" ] && [ kde = "$desktop" ]; then
#        debug="-o Debug::pkgAcquire::Worker=1"
#    fi
    chroot $tmpdir $apttype $debug -y dist-upgrade

    if [ apt-get = "$apttype" ]; then
        echo
        echo "Running apt-get autoremove"
        chroot $tmpdir apt-get $debug -y autoremove
    fi

    echo
    echo "Packages installed in $to"
    echo "==============================="
    chroot $tmpdir dpkg -l|awk '/^.. / { print $1,$2,$3}'|grep -v Err
    chroot $tmpdir dpkg -l|awk '/^.. / { print $1,$2,$3}'|grep -v Err > test-$timestamp-$from-$to-$desktop-$apttype-dpkg-l.txt 2>&1
    echo
    fuser -mv .
}

run_test