#!/bin/bash
# -------
# File:        llxcfg-cpkg-apt
# Description: Simple frontend to llxcfg-cpkg from apt scripts
# Author:      Luis Garcia Gisbert <garcia_luigis@gva.es>
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along 
# with this program; if not, write to the Free Software Foundation, Inc., 
# 51 Franklin St, Fifth Floor, Boston MA 02110-1301 USA
# --------

set -e

# ----
# main
# ----

CPKG="/usr/share/lliurex/llxcfg-backend/llxcfg-cpkg-backend"
[ -x "$CPKG" ] || exit 0
rc=0
case $1 in
   post-dpkg)
      $CPKG --verbose "$1" "$2" || rc=$?
      ;;
   pre-dpkg)
      PKG_LIST="$2"
      if [ "$PKG_LIST" -a -s "$PKG_LIST" ] ; then
         # read list of cpkgs to desintall
         # 1. build list of ".list" files in /var/lib/dpkg/info related to debian packages that are going to be removed
         # 2. find /var/lib/llxcfg/cpkg/packages path (this lives in CPKG_ORIGINAL variable from /usr/share/lliurex/llxcfg-common/llxcfg-common.sh)
         LIB_FILE="/usr/share/lliurex/llxcfg-common/llxcfg-common.sh"
         if [ -r "$LIB_FILE" ] ; then
            . $LIB_FILE
            CPKG_LIST="$(sed -ne "\%^${CPKG_ORIGINAL}/[^/]\+$%{s%^${CPKG_ORIGINAL}/%%;p}" $(sed -ne "/[[:blank:]]-[[:blank:]]*$/{s%^%/var/lib/dpkg/info/%;s%[[:blank:]]\+-[[:blank:]]*$%.list%;p}" "$PKG_LIST") 2>/dev/null || true)"
            if [ "$CPKG_LIST" ] ; then
               $CPKG --verbose revert $CPKG_LIST || rc=$?
            fi
         fi
      fi
      ;;
esac

exit $rc