graph of port dependencies?

[Ryan Schmidt]

On Jul 27, 2011, at 12:17, Andrew Long wrote:

> Does anyone know of a program that will draw a graph of dependencies between ports? Forex, if I select a library that I want to uninstall, I want a graph of all 'top-level' ports that depend on it, so I can make an early decision about keeping it or not, rather than just trying to uninstall it and finding out that it is a dependency for a port that I wnt to keep?

https://trac.macports.org/browser/contrib/port-depgraph/port-depgraph