rake compile will compile CSS to tmp/

Rakefile

@@ -2,7 +2,7 @@ require 'rake/testtask'
 Rake::TestTask.new do |t|
   t.libs << "test"
   t.test_files = FileList['test/*_test.rb']
-  t.verbose = true
+  t.verbose    = true
 end
 
 desc 'Dumps output to a CSS file for testing'
@@ -24,4 +24,25 @@ task :convert, :branch do |t, args|
   Converter.new(branch).process
 end
 
+desc 'Compile bootstrap-sass to tmp/ (or first arg)'
+task :compile, :css_path do |t, args|
+  lib_path = File.join(File.dirname(__FILE__), 'lib')
+  $:.unshift(lib_path) unless $:.include?(lib_path)
+  require 'sass'
+  require 'bootstrap-sass/compass_functions'
+  require 'bootstrap-sass/sass_functions'
+  require 'term/ansicolor'
+
+  path = 'vendor/assets/stylesheets'
+  puts Term::ANSIColor.bold "Compiling SCSS in #{path}"
+  %w(bootstrap bootstrap/_theme).each do |file|
+    save_path = "#{args.with_defaults(css_path: 'tmp')[:css_path]}/#{file.sub(/(^|\/)?_+/, '\1').sub('/', '-')}.css"
+    puts Term::ANSIColor.cyan("  #{save_path}") + '...'
+    engine    = Sass::Engine.for_file("#{path}/#{file}.scss", syntax: :scss, load_paths: [path])
+    css       = engine.render
+    File.mkdir('tmp') unless File.directory?('tmp')
+    File.open(save_path, 'w') { |f| f.write css }
+  end
+end
+
 task default: :test