#! /bin/sh
# preinst script for yaws
#
# 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>

case "$1" in
    install)
    ;;

    upgrade)
	# Remove /etc/mail/yaws-webmail.conf if it isn't modified by user
	if dpkg --compare-versions "$2" lt-nl "1.66-2" ; then
	    cf="/etc/mail/yaws-webmail.conf"
	    if [ -f $cf ] ; then
		md5sumold=$(dpkg-query -W -f='${Conffiles}' yaws | grep $cf | awk '//{print $2}')
		md5sumnew=$(md5sum $cf | awk '//{print $1}')
		if [ "$md5sumold" = "$md5sumnew" ] ; then
		    rm -f $cf
		fi
	    fi
	fi
	# Prepare to move /usr/lib/yaws/custom/* to /usr/local/lib/yaws-appmods/
	if dpkg --compare-versions "$2" lt-nl "1.99" ; then
	    dir=/usr/lib/yaws/custom
	    if [ -d $dir ] ; then
		if [ -d $dir/ebin -a -d $dir/include -a $(find $dir | wc -l) = 3 ] ; then
		    # Don't move /usr/lib/yaws/custom if it has the default structure
		    # (two empty ebin and include subdirs)
		    true
		else
		    mv -f $dir /usr/lib/yaws-custom.dpkg-backup
		fi
	    fi
	fi
    ;;

    abort-upgrade)
    ;;

    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 0
    ;;
esac

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

#DEBHELPER#

exit 0

