Need a way to automatically add org.eclipse.pde.PluginNature to an Eclipse project

[sjmarotta]

I am using sbt to build an OSGi bundle. When I run sbteclipse, it creates the project for me with all of the dependencies, but I have to add the Plug-in nature myself. The documentation does not specify a way to include this in the configuration of the Eclipse project using sbt so that it can be added automatically.