Script Ruby para alterar o Wallpaper

change_wallpaper.rb

#!/usr/bin/env ruby

module ChangeWallpaper
  HOME = ENV['HOME']
  PICTURES_PATH = HOME + '/Pictures'
  WALLPAPERS_PATH = PICTURES_PATH + '/Wallpapers'

  def self.change
    wallpaper = Dir.glob("#{WALLPAPERS_PATH}/**/*").sample
    command = "gsettings set org.gnome.desktop.background picture-uri #{wallpaper}"
    system(command)
  end
end