A flagsToggle is a branching point that your code can utilize to determine whether or not a feature should be made available to one or more customers.This simple gem allow you to enable a feature for a specific set of users, or just your team for them to try it out before it's rolled out for everyone.

Add this line to your application's Gemfile:

gem 'featureToggle'

And then execute:

 $ bundle

Or install it yourself as:

$ gem install featureToggle

Run "rake flags_toggle_config" command will generate under AppRoot/config/initializers/Flags.rb file.All configuration will be placed in this file.You may also specify a Rails environment to use a new feature (eg. in all environments, but not in production):

This will generate file like this:

     FeatureSettings.config do |config|
       config.app_id = 'Some_id'
       config.enable_some_feature = true
       config.desktop_subdomain = 'Some default subdomain'

       if Rails.env.production?
         config.app_id = 'Production_id'
         config.enable_some_feature = false
         config.desktop_subdomain = 'www'
       end

       if Rails.env.development?
       end

       if Rails.env.staging?
         config.desktop_subdomain = 'staging'
       end
     end

If your value is a boolean(PREDICATE) you will access them with question mark at the end:

      Feature.config.test_value? # true/false

If you value is string or number(NON PREDICATE) you will access on normal(Regular) way:

      Feature.config.app_id # some string or number

      desktop_subdomain = Feature.config.desktop_subdomain # eg. 'www'

or

      if Flags.config.enable_some_feature? do
        #do something
      end    

In flagsToggle gem environment variable automatically override you custom configuration.

• Fork the project.

• Make your feature addition or bug fix.

• Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

The gem is available as open source under the terms of the MIT License.