Barcoop
Barcoo's shared RuboCop configuration and cops.
Installation
Add this line to your application's Gemfile:
group :development, :test do
  gem 'barcoop', require: false
end  
Or to your gem's gemspec file:
spec.add_development_dependency 'barcoop'
To use it just add the following line to your .rubocop.yml file:
inherit_gem:
  barcoop: conf/rubocop.yml
If your project is a Rails app or engine, use  rubocop_rails.yml
inherit_gem:
  barcoop: conf/rubocop_rails.yml
Cops
This gems provides the following cops:
AvoidFixtures: Avoid using fixtures, use FactoryGirl instead
AvoidRailsEnv: Avoid using Rails.env.environment? and prefer adding a feature flag in a configuration file.
AvoidTimeout: Timeout.timeout is not thread safe, see http://www.mikeperham.com/2015/05/08/timeout-rubys-most-dangerous-api/