trustieforge/lib/tasks/avatar.rake

desc "compress and backup avatar"
task :compress_avatar => :environment do
  path = File.join(Rails.root, "public/images/avatars/User")
  Dir.foreach(path) do |f|
    if f.to_s =~ /^\d+$/
      puts f
      image = Trustie::Utils::Image.new(File.join(path,f), true)
      image.compress(300)
    end
  end
end