Panda3D Manual: Building patches

Can we get this page filled in from thous who know how?

Ehrm, here’s what I know:
When you have a tree of packages, you invoke ppatcher on it once to generate the base revision. When you want to add new packages to the tree, use pmerge to merge your new packages into the tree, and invoke ppatcher on the tree again to automatically generate patches. The patching itself is handled automagically by the runtime.