From: Wilbert Berendsen <wilbert@...>
Date: 2003-01-26T23:41:58+09:00
Subject: Re: datafiles as Ruby source musings

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On Sunday 26 January 2003 13:57, nobu.nokada@softhome.net wrote:
> Hi,
>
> At Sun, 26 Jan 2003 06:18:09 +0900,
>
> Wilbert Berendsen wrote:
> > module Data
> > 	load "datafile"
> > end
>
> Kernel#load code in the file into toplevel context if (omitted)
> second argument is false, or an anonymous module.
>
> If it were return that anonymous module, you can write as:
>
>   module Data
>     include load("datafile", true)
>   end
>
> or even
>
>   Data = load("datafile", true)

Wow!! I did not know the load method would return the anonymous module. This 
is nice!

> > 2.
> >
> > Other files which my app will need, must contain Makefile-like
> > structures. I would rather just "load" the file, and having the Ruby
> > interpreter take care of the parsing (example:)
> >
> > ALSA && (
> > 	depend "audio/alsa-driver" { |p| p.version >= 0.9 }
> > 	configure << "--enable-alsa"
> > )
> >
> > where 'depend' and 'configure' are just methods in the current instance,
> > and 'ALSA' a constant defined in a module that got included. But again
> > using 'obj.instance_eval File.new("file").read' is the only thing I can
> > think of.
>
> To do it, Kernel#load would need to accept a Module as second
> argument, like as:
>
>   load("depend", Data)
>
>
> Although I don't guess this modification rarely breaks existing
> code, but not sure it's a good thing.

I think I'll have to stick to eval. Of cource eval is dangerous, but my 
process runs a an unprivileged user (like 'nobody') and the scripts are 
trusted.

Thanks for your ideas (also the others :-)
Wilbert

- -- 
Wilbert Berendsen (http://www.xs4all.nl/~wbsoft/)
To understand recursion, one must first understand recursion.
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