How to build one deployable Java app from OSGI Maven bundles?

Question

I have a parent Maven OSGI project and several children projects, with one child project being the Launcher. The parent pom.xml has pom while children pom.xml(s) bundle and I use Maven Bundle Plugin. With Mvn clean install, MANIFEST.MF and jar files are successfully created for the children projects.

However I do not know the next step. How can I create a single java app for the parent project + bundles which is executable? I have looked into Karaf (other options?) but do not know how to create a single jar for the parent project.

Thank you