From: Philip Hallstrom <ruby@...>
Date: 2007-01-13T12:07:30+09:00
Subject: Re: Tattle - The Ruby Census

>> Default: no prompt, no install
>> -Y: no prompt, install
>> --optional-dependencies: prompt
>
> A way to install the optional dependencies for an already-installed
> gem would be great, too. I'm not thinking of a great syntax off the
> top of my head, though.

--only-dependencies

?