Re: variants question

Hi, One final question: how does port handle the case where you've already installed something (e.g. subversion) and you then want to "add on" a variant (e.g. +tools)? Does it do a completely new reinstall, or does it piggy-back off of existing things when it can? Is it standard practice to clean out the existing (via port ... clean) before adding the new variant? Thanks, --b