/usr/ports/distfiles maintenance

[Matt Mills]

Hi all,

Something which has recently struck me as an unanswered question. How do 
you all maintain your /usr/ports/distfiles directory? This isn't a topic 
I've *ever* seen discussed or even mentioned in all the years I've been 
using FreeBSD.

Obviously over time, you get many different versions of the same 
software. These all take up space on your hard disk and eventually 
require some kind of cleanup and/or maintenance.

Basically, my question is: is there some piece of software or automated 
way of keeping the directory clean of stale sources? I can imagine 
obvious problems with automating the process due to different versions 
of the same software in separate ports (eg. autoconf, automake, libtool, 
etc.)

So, what do you all think?

-- 
Matt