How can I delete obsolete distfiles and local binary packages recursively?

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

Hi list,

I have this in my mk.conf:

DISTDIR?= /home/oc/pkgsrc/distfiles
PACKAGES?= /home/oc/pkgsrc/packages

(NB: ~/pkgsrc is the parent directory to the two local clones
pkgsrc-current  and pkgsrc-stable:

$ ls pkgsrc/
distfiles  packages  pkgsrc-current  pkgsrc-stable  work)

These two directories ($DISTDIR, $PACKAGES) are consequently growing
in size. Old distfiles and binary packages exist there, that I will
most likely never use in the future.

Is there a way to delete both distfiles and binary packages that are
not relevant to my current setup? I've checked in the guide and the
wiki, but haven't found an answer.

I guess I could start pruning these files in order of creation, or
maybe any time a new stable release comes out, but I wonder if doing
so could possibly break things later on.

Thanks and have a good day.


-- 
Ottavio Caruso