gistfile1.rb

namespace :deploy do
  desc "create imagehandler dirs"
  task :create_dirs, :roles => :app do
    @config=YAML.load_file('config/imagehandler_config.yml')["production"]
    @config.keys.each do |key|
      val = @config[key]
      if val.is_a?(Hash) && val.keys.include?(:image_sizes)
        val[:image_sizes].each do |name,val|
          topdir = sprintf("%s/%s/",@config[:dirs][:image_storage_top_level_dir] ,name.to_s)
          run "for dir in {{a..f},{0..9}}{{a..f},{0..9}} ; do mkdir -p #{topdir}/$folder/$dir/{{a..f},{0..9}}{{a..f},{0..9}} ; done "
          run "#{sudo} chmod -R 775 #{topdir}"
        end
      end
    end
  end
end

after "deploy:setup", "deploy:create_custom_dirs"