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From: "Ronald F. Guilmette" <rfg@tristatelogic.com>
To: freebsd-ports@freebsd.org
Subject: Deriving base port/package names
Date: Thu, 07 Apr 2016 19:47:50 -0700
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Given a list of all current FreeBSD ports/package, such as a (plain text
version) the list found here:

   https://www.freebsd.org/ports/master-index.html

and assuming that all text past the ' -- ' has already been deleted
from each line, what would be a proper sort of sed command to extract
_just_ the port/package names, without the version numbers attached?