Rakefile in riiif-0.3.0 vs Rakefile in riiif-0.4.0

@@ -1,11 +1,17 @@
-require "bundler/gem_tasks"
+require 'bundler/gem_tasks'
 require 'bundler/setup'
 require 'rspec/core/rake_task'
+require 'rubocop/rake_task'
 RSpec::Core::RakeTask.new(:spec)
 
+desc 'Run style checker'
+RuboCop::RakeTask.new(:rubocop) do |task|
+  task.fail_on_error = true
+end
+
 require 'engine_cart/rake_task'
-task ci: ['engine_cart:generate'] do
-  Rake::Task["spec"].invoke
+task ci: [:rubocop, 'engine_cart:generate'] do
+  Rake::Task['spec'].invoke
 end
 
-task default: :ci
\ No newline at end of file
+task default: :ci