To start, copy the build.properties.dist file to build.properties and configure the values to your specific environment.

Running ant with no targets will ensure that Drush is available, run drush make, and run drush site install. This gets you from 0 to full Demo Framework install in less than 10 minutes, running one command. Pretty cool.

Running ant drush-make will effectively rebuild your docroot using drush make.

If you want to uninstall the the site (a.k.a. drop the database) then run ant uninstall. If you want to re-install the database without re-running drush make, execute ant -Ddrush.nomake=1 install.

This is based on: https://github.com/cpliakas/drupal-ant#usage