From: Adam Prescott <adam@...>
Date: 2013-04-05T21:01:59+09:00
Subject: Re: Role of bundler in creating and installing a gem

On 5 April 2013 12:54, Jon Cairns <lists@ruby-forum.com> wrote:
> So does that mean that you don't add gems to the Gemfile unless you only
> want them for development? And that any dependencies **have** to go in
> the gemspec?

You can include all (runtime + development) dependencies in the
gemspec. Rubygems allows you to specify development dependencies with
#add_development_dependency, to distinguish it from
#add_runtime_dependency.

See http://guides.rubygems.org/specification-reference/#add_development_dependency