graphically show dependencies

[Chris Snook]

Ignacio Vazquez-Abrams wrote:
> On Sat, 2008-01-12 at 13:19 +0000, Caolan McNamara wrote:
>> It'd be nice to see a graph of dependencies in pirut, see what things
>> are at the tip of branches that nothing depends on that could be
>> removed.
> 
> Building such a graph is... non-trivial and shouldn't be done on the
> fly.

http://en.wikipedia.org/wiki/Topological_sort

	-- Chris