Block reload config files in Railtie if they already uploaded

README.md

@@ -55,6 +55,14 @@ 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`.
 
+You can also define your own settings files and load them in the initializer:
+
+```ruby
+Config.setup do |config|
+  config.load_and_set_settings("/path/to/yaml1", "/path/to/yaml2", ...)
+end
+```
+
 ### 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/integrations/rails/railtie.rb

@@ -7,6 +7,8 @@ def preload
           initializer = ::Rails.root.join('config', 'initializers', 'config.rb')
           require initializer if File.exist?(initializer)
 
+          return if Object.const_defined?(Config.const_name)
+
           # Parse the settings before any of the initializers
           Config.load_and_set_settings(
             Config.setting_files(::Rails.root.join('config'), Config.environment.nil? ? ::Rails.env : Config.environment.to_sym)

spec/app/rails_5.2/config/application.rb

@@ -19,6 +19,6 @@ class Application < Rails::Application
     ##
     # Config
     #
-    config_available?
+    # config_available? # This is only available in test context
   end
 end

spec/app/rails_5.2/config/boot.rb

@@ -2,3 +2,4 @@
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
 require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
+require "logger"

spec/app/rails_6.0/config/boot.rb

@@ -2,3 +2,4 @@
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
 require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
+require "logger"

spec/app/rails_6.1/config/boot.rb

@@ -2,3 +2,4 @@
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
 require "bootsnap/setup" # Speed up boot time by caching expensive operations.
+require "logger"

spec/app/rails_7.0/config/boot.rb

@@ -2,3 +2,4 @@
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
 require "bootsnap/setup" # Speed up boot time by caching expensive operations.
+require "logger"

spec/config_env_spec.rb

@@ -14,8 +14,14 @@
       config_instance
     end
 
+    before :all do
+      ENV_BACKUP = ENV.to_hash
+    end
+
     after :all do
       Config.use_env = false
+
+      ENV_BACKUP.each { |k, v| ENV[k] = v }
     end
 
     before :each do

spec/config_spec.rb

@@ -175,6 +175,45 @@
     expect(Settings.size).to eq(2)
   end
 
+  describe "load_and_set_settings in the Rails context" do
+    if defined?(Rails)
+      let(:config_name) { Rails.root.join("config", "initializers", "config.rb") }
+      let(:default_settings_file_name) { Rails.root.join("config", "settings.yml") }
+      let(:custom_settings_file_name) { Rails.root.join("config", "settings_custom.yml") }
+      let(:spring_file_name_for_rails_6_1) { Rails.root.join("bin", "spring") }
+
+      before do
+        File.write(default_settings_file_name, "default: default_value")
+        File.write(custom_settings_file_name, "custom: custom_value")
+        # workaround for Rails 6.1
+        File.write(spring_file_name_for_rails_6_1, "") if Gem::Version.new(Rails.version) >= Gem::Version.new('6.1.0')
+      end
+
+      after do
+        File.delete(config_name) if File.exist?(config_name)
+        File.delete(default_settings_file_name) if File.exist?(default_settings_file_name)
+        File.delete(custom_settings_file_name) if File.exist?(custom_settings_file_name)
+        File.delete(spring_file_name_for_rails_6_1) if File.exist?(spring_file_name_for_rails_6_1)
+      end
+
+      it "should read value only from default settings without config.rb" do
+        values = `#{Rails.root.join("bin", "rails")} runner 'print "\#{Settings.default}|\#{Settings.custom}"'`
+        expect(values).to eq("default_value|")
+      end
+
+      it "should read value only from default settings without use of load_and_set_settings" do
+        File.write(config_name, "Config.setup { |config|  }")
+        values = `#{Rails.root.join("bin", "rails")} runner 'print "\#{Settings.default}|\#{Settings.custom}"'`
+        expect(values).to eq("default_value|")
+      end
+
+      it "should read value only from custom settings with use of load_and_set_settings" do
+        File.write(config_name, "Config.setup { |config| config.load_and_set_settings(['#{custom_settings_file_name}']) }")
+        values = `#{Rails.root.join("bin", "rails")} runner 'print "\#{Settings.default}|\#{Settings.custom}"'`
+        expect(values).to eq("|custom_value")
+      end
+    end
+  end
 
 
   context "Nested Settings" do