Added config.prepend_sources option to Config.setup

README.md

@@ -403,6 +403,10 @@ Settings.path
 
 ### Environment variables
 
+Prepend sources
+
+* `prepend_sources` - ability to prepend settings via Config without the need to reload settings after they run once.
+
 See section below for more details.
 
 ## Working with environment variables

lib/config.rb

@@ -19,6 +19,7 @@ module Config
     env_converter: :downcase,
     env_parse_values: true,
     fail_on_missing: false,
+    prepend_sources: [],
     # deep_merge options
     knockout_prefix: nil,
     merge_nil_values: true,
@@ -57,12 +58,12 @@ def self.load_and_set_settings(*sources)
   end
 
   def self.setting_files(config_root, env)
-    [
+    (Config.prepend_sources + [
       File.join(config_root, 'settings.yml').to_s,
       File.join(config_root, 'settings', "#{env}.yml").to_s,
       File.join(config_root, 'environments', "#{env}.yml").to_s,
       *local_setting_files(config_root, env)
-    ].freeze
+    ]).freeze
   end
 
   def self.local_setting_files(config_root, env)

spec/config_spec.rb

@@ -197,6 +197,11 @@
   end
 
   context "Custom Configuration" do
+
+    before :each do
+      Config._ran_once=false
+    end
+
     it "should have the default settings constant as 'Settings'" do
       expect(Config.const_name).to eq("Settings")
     end
@@ -206,6 +211,18 @@
 
       expect(Config.const_name).to eq("Settings2")
     end
+
+    it "should have prepend_sources empty" do
+      expect(Config.prepend_sources).to eq([])
+    end
+
+    it "should be able to assign prepend_sources" do
+      Config.setup { |config| config.prepend_sources = ["file.yml"] }
+
+      expect(Config.prepend_sources).to eq(["file.yml"])
+      expect(Config.setting_files("./","test")[0]).to eq("file.yml")
+    end
+
   end
 
   context "Settings with a type value of 'hash'" do