get_all_gem_names

# File lib/rubygems/command.rb, line 176
  def get_all_gem_names
    args = options[:args]

    if args.nil? or args.empty? then
      raise Gem::CommandLineError,
            "Please specify at least one gem name (e.g. gem build GEMNAME)"
    end

    args.select { |arg| arg !~ /^-/ }
  end