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#!/bin/sh
# preinst script for openvswitch-switch
#
# 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
case "$1" in
install|upgrade)
if dpkg --compare-versions "$2" lt-nl "2.17.2-1"; then
# the conffile was not owned by the pkg before if it had any
# custom content, retain as is to avoid an upgrade error or
# conffile prompt we back it up in that case and restore it
# in the postinst
# Since it wasn#t owned we can't query the old checksum via
# dpkg-query -W -f='${Conffiles}' as one usually would
conffile="/etc/default/openvswitch-switch"
md5olddebian="167668db26d5b29ec1469413b12d9bbe"
md5oldubuntu="ae4d44b501cfb1eb362d87644a1bae0d"
md5new="$(md5sum ${conffile} | sed -e 's/ .*//')"
if [ "${md5olddebian}" = "${md5new}" ]; then
# was unmodified, remove - will drop the new at unpack
rm -f "${conffile}"
else
if [ ! "${md5oldubuntu}" = "${md5new}" ]; then
# neither matches old default Debian, nor Ubuntu.
# move to restore in postinst after taking conffile ownership
mv "${conffile}" "${conffile}.dpkg-bak"
fi
fi
fi
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
#DEBHELPER#
exit 0
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