YAML to OpenStruct

site_variables.rb

class SiteVariables < YamlToOpenStruct

  def initialize
    variables_yml = YAML::load(File.open('yaml_location'))
    @struct = convert_yml(variables_yml)
  end

  # send method calls to generated struct 
  def method_missing(method, *args, &block)
    @struct.send(method, *args, &block)
  end

end

yaml_to_open_struct.rb

class YamlToOpenStruct
  
  # pass YAML data and return an OpenStruct
  def convert_yml(yaml_data)
    convert_to_struct yaml_data
  end

  private
    
    def convert_to_struct(data)
      case data
      when Hash
        data = data.clone
        data.each { |k, v| data[k] = convert_to_struct(v) }
        OpenStruct.new(data)
      when Array
        data = data.clone
        data.map! { |ele| convert_to_struct(ele) }
      else
        data
      end
    end  
end

yaml_to_open_struct2.rb

class YamlToOpenStruct
  
  # pass YAML data and return an OpenStruct
  def convert_yml(yaml_data)
    convert_to_struct yaml_data
  end

  private
    
    def convert_to_struct(data)
      case data
      when Hash
        data = data.clone
        data.each { |k, v| data[k] = convert_to_struct(v) }
        OpenStruct.new(data)
      when Array
        data = data.clone
        data.map! { |ele| convert_to_struct(ele) }
      else
        data
      end
    end  
end