improved configuration utility

lib/code_ocean/config.rb

@@ -4,11 +4,17 @@ module CodeOcean
       @filename = filename
     end
 
-    def read
-      path = Rails.root.join('config', "#{@filename}.yml")
-      if File.exists?(path)
-        YAML.load_file(path)[Rails.env].symbolize_keys
+    def read(options = {})
+      path = Rails.root.join('config', "#{@filename}.yml#{options[:erb] ? '.erb' : ''}")
+      if ::File.exists?(path)
+        content = options[:erb] ? YAML.load(ERB.new(::File.new(path, 'r').read).result) : YAML.load_file(path)
+        content[Rails.env].with_indifferent_access
+      else
+        raise Error.new("Configuration file not found: #{path}")
       end
     end
   end
+
+  class Config::Error < RuntimeError
+  end
 end