#!/bin/bash

sdir="$(dirname $(realpath "${BASH_SOURCE:-$0}"))"

_dm=$(basename $(grep 'ExecStart=' /etc/systemd/system/display-manager.service))
echo Current Display Manager on this system is: $_dm

case $_dm in 

  lightdm)
    if [[ -d /etc/lightdm ]]; then
    echo adding startup/cleanup configuration
    if sudo mkdir /etc/lightdm/lightdm.conf.d &> /dev/null; then
    sudo cp $sdir/lightdm/lightdm.conf.d/* /etc/lightdm/lightdm.conf.d/
    ls -la /etc/lightdm/lightdm.conf.d 
    else
    echo could not make directory $sdir/lightdm/lightdm.conf.d
    fi
    else
    echo lightdm configuration directory /etc/lightdm does not exist
    echo unable to install user setup/cleanup scripts
    fi
  ;;
  *) 
    echo unknown display manager $_dm
    ;; 
esac