OpenJPA Eclipse Tooling

How to develop on and build the OpenJPA Eclipse Tooling

IDE

1. get Eclipse with PDE
2. check out the https://svn.apache.org/repos/asf/openjpa/devtools/trunk/ (not just the individual project directories, but really the trunk, so that you also have the pom.xml at the root...). If you use Subversive (or Subclipse) from within Eclipse to do the check-out, you'll have to remove the project from the workspace again after checkout, without delete on disk, so that you can import the individual projects in the next step.
3. open the individual projects in Eclipse (org.apache.openjpa.eclipse.feature, org.apache.openjpa, org.apache.openjpa.eclipse, openjpa-eclipse-testproject, org.apache.openjpa.eclipse.tests, org.apache.openjpa.eclipse.site) - requires correct .project and .classpath files currently missing from SVN

Headless Maven-based build (without requiring Eclipse IDE)

1. Maven v3.0

This should ideally be set-up on a public build server, e.g. on the http://hudson.zones.apache.org/hudson/ ?