Suggest to use a class instead of a global variable for a Rails application

[januszm]

The README suggests that you assign the Rollout.new instance to the global variable $rollout. This is not generally recommended for Rails applications, discouraged by Rubocop, and mostly because of thread safety and for a few other reasons, if I remember correctly. Why not suggest something like this for a Rails application?

# config/initializers/rollout.rb
Feature = Rollout.new(Redis.current).freeze
# ...
# somewhere else
Feature.active? :chat

[januszm]

Could someone confirm that this gem is thread safe in multithreaded, production environment?