Building along with Project Dependencies in Ant

I have a Java project that is dependent on other Java projects that are siblings and there is a chain of dependencies. Each individual project has a build script written in Ant. For clarity find below a sample of the same.

1. EARProject depends on WebProject and EJBProject: The war file that is generated by the WebProject build and jar file that is generated by the EJBProject are needed to build the EARProject.

2. WebProject depends on ComponentOneProject: The jar file that is generated by the ComponentOneProject build is needed to build WebProject.

3. EJBProject depends on ComponentTwoProject: The jar file that is generated by the ComponentTwoProject build is needed to build EJBProject.

So, when I build the EARProject build, if the dependent war and jar have not been built yet, then it should k开发者_Go百科ick-off the WebProject build and EJBProject build and if the ComponentOneProject is yet to be built, the build of ComponentOneProject needs to be kicked-off and so on.

Can someone suggest a clean method by which we can accomplish this?

Facing the same problem we at our company wrote a custom Groovy script that explores the full dependency tree ant generates the Ant build scripts based on all the .project, .classpath, .settings/* files. This wasn't as difficult as it might seem as first. This way we can build our products without (My)Eclipse on a clean CVS+JDK+Groovy virtual machine. Hope it helps..