Lorem Picsum Wallpapers (Cinnamon)

picsum-wallpapers.sh

#!/bin/sh
set -e

# Sets your wallpaper to a random photo from <https://picsum.photos>.
# Run regularly (e.g. automatically on login) to keep your desktop fresh.

cache="${XDG_CACHE_HOME:-$HOME/.cache}/picsum-wallpapers"
mkdir -p "$cache"

new="$cache/new.jpg"
use="$cache/current.jpg"

resolution=$(xrandr | grep -F '*' | awk '{print $1}' | sort -nr | head -n1)
curl -sL "https://picsum.photos/$(echo "$resolution" | tr x /)?random" >"$new"

if [ $? -ne 0 ]; then
	echo 'Error downloading wallpaper' >&2
	exit 1
fi

mv "$new" "$use"
gsettings set org.cinnamon.desktop.background picture-uri "file://$use"