#!/bin/sh

set -e

case "$1" in

install|upgrade)
    # If we're upgrading from 2.5.0+dfsg-6+wheezy1 or earlier, we have to
    # deal with config.tcl which was marked as a conffile and 
    # modified by postinst script.
    # 
    # If the file was not modified by the user, then we can restore
    # it to its initial state (before running postinst and modify it
    # with debconf values) by deleting the modified lines.
    #
    # See Bug #688435
    #  
    if dpkg --compare-versions "$2" le-nl "2.5.0+dfsg-6+wheezy1"
    then
        # First, make a copy so we can get the old config values
        cp /etc/dotlrn/config.tcl /etc/dotlrn/config.tcl.old_version
        # Reset config.tcl to its primordial state
        sed -i '/set db_host/,/set db_user/d' /etc/dotlrn/config.tcl
    fi
    ;;

abort-upgrade)
    ;;

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

#DEBHELPER#

exit 0
