#!/bin/sh
# Remove the Nylas repository.
# Copyright (c) 2009 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license.

set -e
action="$1"

# Only do complete clean-up on purge.
if [ "$action" != "purge" ] ; then
  exit 0
fi

APT_GET="`which apt-get 2> /dev/null`"
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
}

uninstall_key() {
  APT_KEY="`which apt-key 2> /dev/null`"
  if [ -x "$APT_KEY" ]; then
    # don't fail if the key wasn't found
    "$APT_KEY" rm 7D0ACF4A >/dev/null 2>&1 || true
  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 a repository from the apt sources.
# Returns:
# 0 - successfully removed, or not configured
# 1 - failed to remove
clean_sources_lists() {
  find_apt_sources

  if [ -d "$APT_SOURCESDIR" ]; then
    rm -f "$APT_SOURCESDIR/nylas.list"
  fi

  return 0
}

uninstall_key
clean_sources_lists

exit 0
