update-notifier/notify-updates

#!/bin/sh

_target_file="/tmp/pacman-update-count"
# if set to 1 then also notify if no updates available
_notify_none=0
_error_code=0
_show_help=0
_hostname=$(hostname)
_config_file="$HOME/.config/notify-updates/notify-updates.config"

if ! [ -f "$_target_file" ] ;
then
  echo "notify-updates: cannot access '$_target_file': File not found"
  echo "notify-updates: try executing 'pacman-update-count.sh'"
  exit 1
fi

for _arg in "$@" ; do
  if [ "$_arg" = "-h" ] || [ "$_arg" = "--help" ] ; then
    _show_help=1
  elif [ "$_arg" = "-n" ] || [ "$_arg" = "--notify-none" ] ; then
    _notify_none=1
  else
    _error_code="5"
    _show_help=1
    echo "notify-updates: invalid option -- $_arg"
  fi
done

if [ "$_show_help" -eq 1 ] ; then
  echo "Options:"
  echo "  -h, --help          show this message and exit"
  echo "  -n, --notify-none   notify if no updates available"
  exit "$_error_code"
fi

if [ "$_error_code" -gt 0 ] ; then
  exit "$_error_code"
fi

# TODO use $XDG_CONFIG_HOME
if [ -f "$_config_file" ] ; then
  # shellcheck source=notify-updates.config
  .  "$_config_file"
else
  echo "notify-updates: warning - config file not found: $_config_file"
fi

if [ "$notify_if_none" = "true" ] ; then
  _notify_none=1
elif [ "$notify_if_none" = "false" ] ; then
  _notify_none=0
fi

_updates_available=$(cat $_target_file)

if [ "$_updates_available" -gt 0 ] ; then
  _plural="s"
  if [ "$_updates_available" -lt 2 ] ; then
    _plural=""
  fi
  echo "Attention please: Update required for $_hostname: $_updates_available package$_plural" | festival --tts
  notify-send "Update Notifier" "Update required: $_updates_available package$_plural"
elif [ "$_notify_none" -eq 1 ] ; then
  echo "Attention please: No package updates required for $_hostname" | festival --tts
  notify-send -u low "Update Notifier" "No updates required"
fi