A possibly odd upgrade question

[Chris Brennan]

On Wed, May 4, 2011 at 2:40 PM, illoai at gmail.com <illoai at gmail.com> wrote:

> On 4 May 2011 12:50, Chris Brennan <xaero at xaerolimit.net> wrote:
> >  is it safe to nuke /usr/local (excluding  /usr/local/home), rebuild
> > world/kernel for 8.2 and start with a fresh ports tree?
>
> Yes, though pkg_delete -af will probably suffice for removing
> the ports (& /var/db/pkg/ as well).
>

Someone else suggested 'pkg_delete -av' ... would -avf then be a safe
assumption?

I want to make sure I have a solid leg to stand on before I start
anything...