Configuring the environment name in Rails

README.md

@@ -53,6 +53,8 @@ which will generate customizable config file `config/initializers/config.rb` and
 
 You can now edit them to adjust to your needs.
 
+> Note: By default, the config environment will match the Rails environment (`Rails.env`). This can be changed by setting `config.environment`.
+
 ### Installing on Padrino
 
 Add the gem to your `Gemfile` and run `bundle install` to install it. Then edit `app.rb` and register `Config`

lib/config.rb

@@ -27,7 +27,8 @@ module Config
     overwrite_arrays: true,
     merge_hash_arrays: false,
     validation_contract: nil,
-    evaluate_erb_in_yaml: true
+    evaluate_erb_in_yaml: true,
+    environment: nil
   )
 
   def self.setup

lib/config/integrations/rails/railtie.rb

@@ -9,7 +9,7 @@ def preload
 
           # Parse the settings before any of the initializers
           Config.load_and_set_settings(
-            Config.setting_files(::Rails.root.join('config'), ::Rails.env)
+            Config.setting_files(::Rails.root.join('config'), Config.environment.nil? ? ::Rails.env : Config.environment.to_sym)
           )
         end
 

lib/generators/config/templates/config.rb

@@ -15,6 +15,11 @@
   #
   # config.overwrite_arrays = true
 
+  # Defines current environment, affecting which settings file will be loaded.
+  # Default: `Rails.env`
+  #
+  # config.environment = ENV.fetch('ENVIRONMENT', :development)
+
   # Load environment variables from the `ENV` object and override any settings defined in files.
   #
   # config.use_env = false