source: trunk/debathena/config/reactivate/debian/debathena-reactivate.preinst @ 25727

#!/bin/sh
# preinst script for debathena-reactivate
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <new-preinst> `install'
#        * <new-preinst> `install' <old-version>
#        * <new-preinst> `upgrade' <old-version>
#        * <old-preinst> `abort-upgrade' <new-version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


package=debathena-reactivate
ours=.debathena
theirs=.debathena-orig

undivert_unlink_symlink()
{
    file="$1"
    ourfile="$2"
    theirfile="$3"
    if [ ! -L "$file" ] || \
        [ "$(readlink "$file")" != "$(basename "$ourfile")" -a \
          "$(readlink "$file")" != "$(basename "$theirfile")" ]; then
        echo "*** OMINOUS WARNING ***: $file is not linked to either $(basename "$ourfile") or $(basename "$theirfile")" >&2
    else
        rm -f "$file"
    fi
}

undivert_unlink_divert()
{
    file="$1"
    if [ ! -L "$file" ] && [ ! -e "$file" ]; then
        dpkg-divert --remove --rename --package "$package" "$file"
    else
        echo "Not removing diversion of $file by $package" >&2
    fi
}

undivert_unlink()
{
    prefix=$1
    suffix=$2

    file=$prefix$suffix
    ourfile=$prefix$ours$suffix
    theirfile=$prefix$theirs$suffix

    undivert_unlink_symlink "$file" "$ourfile" "$theirfile"
    undivert_unlink_divert "$file" "$package"
}

cleanup_old_diversion() {
    file="$1"
    if dpkg-divert --list "${file}" | grep -Fxq "diversion of ${file} to ${file}${theirs} by ${package}"; then
        undivert_unlink "$file"
    fi
}
        
if dpkg-maintscript-helper supports rm_conffile 2> /dev/null; then
    dpkg-maintscript-helper rm_conffile /etc/athena/sudo-error 2.0.39 -- "$@"
    dpkg-maintscript-helper rm_conffile /etc/athena/su-error 2.0.39 -- "$@"
else
    # From http://wiki.debian.org/DpkgConffileHandling
    rm_conffile() {
        local PKGNAME="$1"
        local CONFFILE="$2"
        
        [ -e "$CONFFILE" ] || return 0
        
        local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
        local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
            sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
        if [ "$md5sum" != "$old_md5sum" ]; then
            echo "Obsolete conffile $CONFFILE has been modified by you."
            echo "Saving as $CONFFILE.dpkg-bak ..."
            mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
        else
            echo "Removing obsolete conffile $CONFFILE ..."
            mv -f "$CONFFILE" "$CONFFILE".dpkg-del
        fi
    }
    case "$1" in
        install|upgrade)
            if dpkg --compare-versions "$2" le-nl 2.0.39; then
                rm_conffile debathena-reactivate "/etc/athena/sudo-error"
                rm_conffile debathena-reactivate "/etc/athena/su-error"
            fi
    esac
fi

case "$1" in
    install|upgrade)
        cleanup_old_diversion /etc/gdm/PreSession/Default
        cleanup_old_diversion /etc/gdm/PostSession/Default
        if dpkg --compare-versions "$2" lt-nl 2.0~ && \
            [ -w /etc/schroot/schroot.conf ] && \
            grep -q '###ATHENA-BEGIN###' /etc/schroot/schroot.conf; then
            sed -i -e '/###ATHENA-BEGIN###/,/###ATHENA-END###/d' /etc/schroot/schroot.conf
        fi
    ;;

    abort-upgrade)
    ;;

    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0