Sass + Compass compile css with minification and map file

Scope

I am trying to mimic the way how files are generated in the Bootstrap Distribution that contains the css file with minification and the map files by using the Bootstrap Sass.

Compass

When I compile in development mode, I will get the normal css; when I compile in production mode, I will get the minified css.

In my config.rb

output_style = (environment == :production) ? :compressed : :expanded

on_stylesheet_saved do |file|
 if File.exists?(file) && (output_style == :compressed)
  filename = File.basename(file, File.extname(file))
  FileUtils.mv(file, css_dir + "/" + filename + ".min" + File.extname(file))
  puts "   minify " + css_dir + "/" + filename + ".min" + File.extname(file)
 end
end

The output will look like this between development (default) and production.

Map File

In order to generate the map files, it can be done via a switch.

compass compile --sourcemap

Or by setting up in the config.rb.

sourcemap = (environment == :production)