Rakefile in attractor-0.3.0 vs Rakefile in attractor-0.3.1

@@ -1,7 +1,27 @@
-require "bundler/gem_tasks"
-require "rspec/core/rake_task"
+# frozen_string_literal: true
+
+require 'autoprefixer-rails'
+require 'bootstrap'
+require 'bundler/gem_tasks'
+require 'fileutils'
+require 'rspec/core/rake_task'
+require 'sassc'
 require 'structured_changelog/tasks'
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
+task default: :spec
+
+desc 'Preprocess assets'
+task :assets do
+  puts 'Preprocessing SCSS and JS files'
+
+  puts 'Copying over bootstrap'
+
+  FileUtils.cp_r Gem::Specification.find_by_name('bootstrap').gem_dir, 'tmp'
+
+  sass = File.read(File.expand_path('./app/assets/stylesheets/main.scss'))
+  css = SassC::Engine.new(sass, style: :compressed).render
+  prefixed = AutoprefixerRails.process(css)
+  File.open(File.expand_path('./app/assets/stylesheets/main.css'), 'w') { |file| file.write(prefixed) }
+end