This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
There is no default target in ant and you have not specified one in the <project> statement, so if you do not specify a target on the command line then ant will do nothing. And as it reported, is was successful at doing nothing.