Save and restore Finder's desktop icons position

desktop-icons.rb

#!/usr/local/bin/macruby  

# Damn evil Finder will insist crashing and reshuffling
# icons in my carefully laid out desktop.
require 'rubygems'
require 'thor'
require 'yaml'

framework "ScriptingBridge"

class DesktopIcons < Thor
  desc "save", "saves desktop icons position"
  def save
    positions = Hash[finder.desktop.items.map do |i|
      pos = i.desktopPosition
      [ i.name, [pos.x, pos.y] ]
    end]
    File.open(file, 'w') do |f|
      f.write YAML::dump(positions)
    end
  end

  desc "restore", "restores desktop icons to previous position"
  def restore
    unless File.exists? file
      say "#{file} not found.", :red
      exit 1
    end
    data = YAML::load(File.new file)
    finder.desktop.items.
      select { |i| data[i.name] }.
      each { |i| i.desktopPosition = data[i.name] }
    puts "Done restoring icons."
  end

  no_tasks do 
    def file
      ENV['HOME'] + '/.desktop-icons.yml'
    end
    def finder
      @finder ||= SBApplication.applicationWithBundleIdentifier("com.apple.Finder")  
    end
  end
end
DesktopIcons.start