Wrapper for nitrogen, so LightDM wallpaper is synced (https://rafaelc.org/posts/sync-wm-wallpaper-with-lightdm-on-linux-mint/). Previously tracked on my dotfiles repository.

nitrogen

#!/usr/bin/env bash
#
# Wrapper for nitrogen, so LightDM wallpaper is synced.
#
# Copyright (C) 2021 Rafael Cavalcanti <https://rafaelc.org/dev>
# Licensed under GPLv3

set -euo pipefail

/usr/bin/nitrogen "$@"
# We could exit here in the case of `nitrogen --restore` (to bypass setting
# LightDM's wallpaper again in that case). This would work fine if we don't
# login into other DEs where the wallpaper is managed by other software.
# However, if we login into Cinnamon, for example, it will overwrite LightDM's
# wallpaper with the one set there. So, upon calling `nitrogen --restore`, it
# also makes sense to set the LightDM wallpaper.

readonly bg_path="$(awk -F '=' '/file/{print $2}' "$HOME/.config/nitrogen/bg-saved.cfg")"

dbus-send \
  --print-reply \
  --system \
  --dest=org.freedesktop.Accounts \
  /org/freedesktop/Accounts/User$(id -u) \
  org.freedesktop.DBus.Properties.Set \
  string:org.freedesktop.DisplayManager.AccountsService \
  string:BackgroundFile \
  variant:string:"$bg_path"