#!/bin/bash
# Debian lightdm package pre-removal script
# © 2010 Yves-Alexis Perez, using lightdm script which is
# Copyright 2001 Branden Robinson.
# Licensed under the GNU General Public License, version 2.  See the file
# /usr/share/common-licenses/GPL or <http://www.gnu.org/copyleft/gpl.txt>.
# Acknowlegements to Stephen Early, Mark Eichin, and Manoj Srivastava.

set -e

THIS_PACKAGE=lightdm
DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager

if [ "$1" = "remove" -o "$1" = "deconfigure" ]; then
  if [ -e /usr/share/debconf/confmodule ]; then
    . /usr/share/debconf/confmodule
    # disown this question
    db_unregister shared/default-x-display-manager || true
    # does the question still exist?
    if db_get shared/default-x-display-manager; then
      db_metaget shared/default-x-display-manager owners
      db_subst shared/default-x-display-manager choices "$RET"
      db_get shared/default-x-display-manager
      # are we removing the currently selected display manager?
      if [ "$THIS_PACKAGE" = "$RET" ]; then
        if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
          db_get "$RET"/daemon_name
          if [ "$(cat $DEFAULT_DISPLAY_MANAGER_FILE)" = "$RET" ]; then
            rm "$DEFAULT_DISPLAY_MANAGER_FILE"
          fi
        fi
        # ask the user to choose a new default
        db_fset shared/default-x-display-manager seen false
        db_input critical shared/default-x-display-manager || true
        db_go
        # if the display manager file doesn't exist, write it with the path
        # to the new default display manager
        if [ ! -e $DEFAULT_DISPLAY_MANAGER_FILE ]; then
          db_get shared/default-x-display-manager
          echo "Please be sure to run \"dpkg-reconfigure $RET\"."
          db_get "$RET"/daemon_name
          echo "$RET" > "$DEFAULT_DISPLAY_MANAGER_FILE"
        fi
      fi
    fi
  fi
fi

if [ "$1" = "remove" ]; then
  if [ -x /etc/init.d/lightdm ]; then
    nostop=
    for hostname in "" "localhost" "$(hostname)" "$(hostname -f)"; do
      if echo $DISPLAY | grep -q "^$hostname:0.*"; then
        nostop=yes
      fi
    done
    if [ -z $nostop ]; then
      invoke-rc.d lightdm stop
    fi
  fi
fi



exit 0