Padrino Sprockets Plugin

padrino-sprockets.rb

module SprocketsInitializer
  def self.registered(app)
    require "sprockets"
    app.controllers :assets do
      helpers do
        def sprockets_env
          return @sprockets_environment if @sprockets_environment
          @sprockets_environment = Sprockets::Environment.new(Padrino.root)
          @sprockets_environment.append_path 'app/assets/javascripts'
          @sprockets_environment.append_path 'app/assets/stylesheets'
          @sprockets_environment.append_path 'app/assets/images'

          # @sprockets_environment.engines[".coffee"].default_bare=true
          @sprockets_environment.js_compressor = Uglifier.new(mangle: true)
          @sprockets_environment
        end
        
        def asset_glob(type)
          dir = case type
          when :js then "javascripts"
          when :css then "stylesheets"
          else
            "images"
          end
          
          Padrino.root("app/assets/#{dir}/**/*")
        end

        def assets_digest
          Digest::MD5.hexdigest (env["PATH_INFO"] + Dir[asset_glob(content_type)].map { |f| File.mtime(f).to_s }.join)
        end
      end

      get :path, :map => "/assets/*splat", :provides => [:js, :css, :png, :jpg, :tiff] do
        etag assets_digest
        env['PATH_INFO'].gsub!(%r{^/?assets}, '')
        sprockets_env.call(env)
      end
    end
  end
end