What's the proper way to have envionrment variables inserted into my configuration file? - configuration

Question

Using Rails 5.0.1. I have this in my config/initializers/sidekiq.rb file ...
Sidekiq.configure_server do |config|
config.redis = { url: 'redis://#{ENV['REDIS_PORT_6379_TCP_ADDR']}:#{ENV['REDIS_PORT_6379_TCP_PORT']}/12', namespace: "sidekiq_app_name_#{ENV['RAILS_ENV']}" }
end
Sidekiq.configure_client do |config|
config.redis = { url: 'redis://#{ENV['REDIS_PORT_6379_TCP_ADDR']}:#{ENV['REDIS_PORT_6379_TCP_PORT']}/12', namespace: "sidekiq_app_name_#{ENV['RAILS_ENV']}" }
end
Although I have the envionrment variables defined in my system, when I attempt to start my server, I get these errors ...
/Users/davea/.rvm/gems/ruby-2.4.0/gems/activesupport-5.0.2/lib/active_support/dependencies.rb:287:in `load': /Users/davea/Documents/workspace/myproject/config/initializers/sidekiq.rb:2: syntax error, unexpected tCONSTANT, expecting '}' (SyntaxError)
{ENV['REDIS_PORT_6379_TCP_ADDR']}:#{ENV['REDIS_PORT_6379_TCP
^
/Users/davea/Documents/workspace/myproject/config/initializers/sidekiq.rb:2: syntax error, unexpected tCONSTANT, expecting keyword_end
{ENV['REDIS_PORT_6379_TCP_PORT']}/12', namespace: "sidekiq_a
^
/Users/davea/Documents/workspace/myproject/config/initializers/sidekiq.rb:2: syntax error, unexpected '}', expecting end-of-input
pp_name_#{ENV['RAILS_ENV']}" }
What's the proper way to insert environment variables into my configuration file?

Answer 1

You can use the gem figaro:
gem "figaro"
How to use it, in the readme.txt explain very easly:
config/application.yml
stripe_api_key: "sk_live_dSqzdUq80sw9GWmuoI0qJ9rL"
ENV["stripe_api_key"] # => "sk_live_dSqzdUq80sw9GWmuoI0qJ9rL"
ENV.key?("stripe_api_key") # => true
ENV["google_analytics_key"] # => nil
ENV.key?("google_analytics_key") # => false
Figaro.env.stripe_api_key # => "sk_live_dSqzdUq80sw9GWmuoI0qJ9rL"
Figaro.env.stripe_api_key? # => true
Figaro.env.google_analytics_key # => nil
Figaro.env.google_analytics_key? # => false