see #93509 for details on what build script extensibility is.
implement the spi part of the contract and include the AntBuildExtender in the
project's lookup for 3rd party extensions to use.
see j2se project for example.
If there are any non-core targets currently in your project type's
build-impl.xml, consider making them extensions as well. (like there is jaxws in
Increasing priority to P2 (see issue 101710)
There is currently no plan to address this for NetBeans 6, changing to
ENHANCEMENT with target milestone 'future'.
Milan, isn't this currently fixed? Thanks.
See the issue 101710.