Compass/Sinatra Loading Modules

I'm trying to load the CSS3 and reset modules within my SCSS files, but I'm getting an error when trying to import any Compass-specific module.

Sinatra App:

require 'rubygems'
require 'sinatra'
require 'sass'
require 'compass'

configure do
  set :scss, {:style => :compact, :debug_info => false}
  Compass.add_project_configuration(File.join(Sinatra::Application.root, 'config',     'compass.rb'))
end

get '/css/:name.css' do
  content_type 'text/css', :charset => 'utf-8'
  scss(:"stylesheets/#{params[:name]}" )
end

style.scss:

@import "compass/reset";
@import "compass/css3";

Error Message:

Sass::SyntaxError at /css/style.css
File to import not found or unreadable: compass/reset. Load path: /Users/work/repos/mysite

Is there a gem I can install to automatically pull these modules, or do I have to move the Compass files into my Sinatra application?

Solution

After a correct configuration in your compass.rb, usually is enough to add something like:

   get '/stylesheets/:name.css' do
    content_type 'text/css', :charset => 'utf-8'
    sass params[:name].to_sym, Compass.sass_engine_options
   end

to your routes. Sinatra Integration, Sample project, or something you may consider useful: Better Compass integration for Sinatra (extracted from BigBand)

In a modular Modular App I use something like:

module Assets
  # #Sass/Compass Handler
  class Stylesheets < Sinatra::Base
    register  CompassInitializer
    get '/stylesheets/:name.css' do
      content_type 'text/css', :charset => 'utf-8'
      sass params[:name].to_sym, Compass.sass_engine_options
    end
  end
end

and I have in my lib folder a file compass_plugin.rb

module CompassInitializer
  def self.registered(app)
require 'sass/plugin/rack'
Compass.configuration do |config|
  config.project_path = Padrino.root
  config.sass_dir = "app/stylesheets"
  config.project_type = :stand_alone
  config.http_path = "/"
  config.css_dir = "public/stylesheets"
  config.images_dir = "public/images"
  config.javascripts_dir = "public/javascripts"
  config.output_style = :compressed
end
Compass.configure_sass_plugin!
Compass.handle_configuration_change!
app.use Sass::Plugin::Rack
  end
end

which is shamelessly stolen from Padrino framework