class Middleman::Extension

def setup_options(options_hash)
  @options = self.class.config.dup
  @options.finalize!
  options_hash.each do |k, v|
    @options[k] = v
  end
  yield @options, self if block_given?
  @options.all_settings.each do |o|
    next unless o.options[:required] && !o.value_set?
    logger.error "The `:#{o.key}` option of the `#{self.class.ext_name}` extension is required."
    exit(1)
  end
end