From owner-freebsd-ports@freebsd.org  Fri Apr  8 17:49:09 2016
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From: "Ronald F. Guilmette" <rfg@tristatelogic.com>
To: freebsd-ports@freebsd.org
Subject: Re: Deriving base port/package names
In-Reply-To: <5707553C.40008@quip.cz>
Date: Fri, 08 Apr 2016 10:49:07 -0700
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In message <5707553C.40008@quip.cz>, Miroslav Lachman <000.fbsd@quip.cz> wrote:

>If you have the index stripped to
>
>yorick-2.2.04_1
>
>This will do the trick
>sed 's/-[0-9a-z.,_+]*$//g' master-index.txt


Thank you.  Your response made me realize that there's an even simpler
solution...

sed 's/-[^\-]*$//'

That seems to do the trick!