Using Ant from Rakefile in JRuby

gistfile1.rb

task :war do
  ant.war :destfile => 'pkg/project.war' do |war|            
    war.fileset :dir => 'public'
    war.webinf :dir => '.' do |wi|
      wi.include :name => 'config/**/*'
      wi.include :name => 'lib/**/*'
      wi.include :name => 'app/**/*'
      wi.include :name => 'vendor/**/*'
      wi.include :name => 'config.ru'
      wi.include :name => 'Rakefile'
    end
  end
end