How To Run Ant From An Ant Script
The simplest and best way to invoke ant from within an ant build script is to use the core ant task provided for that purpose.
Typical examples of usage:
However, if you want to run ant in a way not supported by the core ant task, such as to pass non-standard command line parameters, one can use the core java task instead:
or
I found this useful for doing TestDrivenDevelopmentInAnt -- writing ant scripts that test other ant scripts.