From: Jamis Buck <jamis@37signals.com>
Date: 2005-08-19T06:45:22+09:00
Subject: Re: domain-specific language

On Aug 18, 2005, at 3:40 PM, Joe Van Dyk wrote:

> I'm writing an application that controls a group/cluster of linux
> computers/nodes.  I need to have a configuration file that lists the
> nodes in the cluster.
>
> It would be neat if the configuration file was in Ruby.  If I had
> nodes named node1 and node3, the configuration file could look a
> little like:
>
> node :node1 do
>   ip 192.whatever
>   title "Node 1"
> end
>
> node :node2 do
>   ip 192.whatever
>   title "Node 2"
> end
>
> So, is there some standard Ruby idiom for how to read a file and
> execute the code?  Just load the file and instance_eval it?

That's what SwitchTower does. I'm sure there's many other ways to do  
it, but it works well enough.

- Jamis