brew/Library/Homebrew/cask/lib/hbc/url.rb

class URL
  ATTRIBUTES = [
    :using,
    :tag, :branch, :revisions, :revision,
    :trust_cert, :cookies, :referer, :user_agent,
    :data
  ].freeze

  attr_reader :uri
  attr_reader(*ATTRIBUTES)

  extend Forwardable
  def_delegators :uri, :path, :scheme, :to_s

  def initialize(uri, options = {})
    @uri        = URI(uri)
    @user_agent = :default

    ATTRIBUTES.each do |attribute|
      next unless options.key?(attribute)
      instance_variable_set("@#{attribute}", options[attribute])
    end
  end
end