wallrotate.rb

#!/usr/bin/ruby
############################################################
# Simple wallpaper-rotation script. You can run it in cron.#
############################################################
#
# Defaulting parameters which can be specified at the CLI
#
command = ARGV[0] 
command ||= "/usr/bin/feh --bg-scale"
dir = ARGV[1]
dir ||= "/home/michael/wall/default/" 
#
# Selects proper wallpaper randomly from the images in the directory
#
wallpapers = (Dir.new dir).entries.select do |entry|
  [".jpg", ".png", ".jpeg"].include? File.extname(entry)
end
choice = wallpapers[rand(wallpapers.length)]
#
# Now it actually sets the wallpaper
#
%x{ #{ command } "#{ File.join(dir, choice) }" } unless choice.empty?