# File lib/rubygems/command.rb, line 166 def get_one_gem_name args = options[:args] if args.nil? or args.empty? then raise Gem::CommandLineError, "Please specify a gem name on the command line (e.g. gem build GEMNAME)" end if args.size > 1 then raise Gem::CommandLineError, "Too many gem names (#{args.join(', ')}); please specify only one" end args.first end