#!/bin/sh
#
# Jitsi, the OpenSource Java VoIP and Instant Messaging client.
#
# Copyright @ 2015 Atlassian Pty Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# sources.list setting for Jitsi updates.
REPOCONFIG="deb http://download.jitsi.org/deb unstable/"

APT_CONFIG="`which apt-config 2> /dev/null`"


# Parse apt configuration and return requested variable value.
apt_config_val() {
  APTVAR="$1"
  if [ -x "$APT_CONFIG" ]; then
    "$APT_CONFIG" dump | sed -e "/^$APTVAR /"'!d' -e "s/^$APTVAR \"\(.*\)\".*/\1/"
  fi
}

# Set variables for the locations of the apt sources lists.
find_apt_sources() {
  APTDIR=$(apt_config_val Dir)
  APTETC=$(apt_config_val 'Dir::Etc')
  APT_SOURCES="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourcelist')"
  APT_SOURCESDIR="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourceparts')"
}

# Remove our custom sources list file.
# Returns:
# 0 - successfully removed, or not configured
# !0 - failed to remove
clean_sources_lists() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources

  rm -f "$APT_SOURCESDIR/jitsi.list"
}

remove_key() {
   APT_KEY="`which apt-key 2> /dev/null`"
   if [ -x "$APT_KEY" ]; then
     "$APT_KEY" del EB0AB654
   fi
}

## MAIN ##
# Remove any Jitsi repository added by the package previously.
clean_sources_lists
# Remove jitsi repository key
remove_key