FreeBSD port manager

It would be very handy if portmanager are able to do
this by providing some command-line arguments:

1. List hierarchical dependency ports of a port in subject.
This will do more than pkg_info -rR <the-port>,
which doesn't necessarily show the exact run/build
dependencies amongst all ports concerned.


Also, it would be very convenient to add CLI
options/arguments to specify where to save all
generated packages, in conjunction with the "-bu" option ?

thanks
Ricky