Ant: project dependencies in a flat project layout with ivy

I have two (Eclipse-) projects. Proj开发者_如何学Pythonect A depends on project B, but the projects aren't nested i.e. project A is not a subproject of project B. Apache Ivy is responsible for the dependency management. When I run the compile task in Project A, is there any way to trigger the compile task (in project B) automatically (for example if the jar file of project B doesn't exist)? Thanks a million in advance.

You need to use the ivy task buildlist.