iscan.postrm.in

#! /bin/sh
#  iscan.postrm -- things to do after package removal
#  Copyright (C) 2009  SEIKO EPSON CORPORATION
#
#  License: GPLv2+


#DEBHELPER#


PREFIX=@DEB_CONFIGURE_PREFIX@
SYSCONFDIR=@DEB_CONFIGURE_SYSCONFDIR@
PACKAGE=@DEB_SOURCE_PACKAGE@

undivert () {
    file=$1
    dest=`echo $file | sed "s|epkowa|epkowa-deb|"`

    test -e $dest || return
    dpkg-divert --package $PACKAGE --remove --rename --divert $dest $file
}

# Checks whether we need to restore the configuration file for libsane-extras
# The criteria are that libsane-extras:
# - has been installed and possibly uninstalled, but not purged
# - has a version less than 1.0.19.12
needs_restore () {
    vers=`dpkg-query --show --showformat='${Version}' libsane-extras`
    status=`dpkg-query --show --showformat='${Status}' libsane-extras \
            | cut -d' ' -f1`
    test x"install" = x"$status" -o x"deinstall" = x"$status" \
    && dpkg --compare-versions "$vers" lt 1.0.19.12 >/dev/null 2>&1
}

if test remove = "$1"; then
    if test /usr = "$PREFIX"; then
	undivert /usr/lib/sane/libsane-epkowa.la
	undivert /usr/lib/sane/libsane-epkowa.so.1
	undivert /usr/share/man/man5/sane-epkowa.5.gz
    fi
fi

if test purge = "$1"; then
    if test /etc = "$SYSCONFDIR" && test -e /etc/sane.d/bak.epkowa.conf; then
	if needs_restore; then
	    # prevent purging of conf file by restoring backup
	    mv /etc/sane.d/bak.epkowa.conf /etc/sane.d/epkowa.conf
	else
	    rm /etc/sane.d/bak.epkowa.conf
	fi
    fi
fi

exit 0