From: zuzu <sean.zuzu@...>
Date: 2004-10-02T04:36:16+09:00
Subject: Re: Ruby as a shell (was Re: irb: a great tool in it's own right)

http://www.rubyist.net/~rubikitch/computer/irbsh/

-z

On Fri, 1 Oct 2004 22:53:07 +0900, Eivind Eklund <eeklund@gmail.com> wrote:
> On Fri, 1 Oct 2004 20:17:14 +0900, Kaspar Schiess <eule@space.ch> wrote:
> > Just in case anyone is really interested, the def is
> >
> > ~ def method_missing( method, *args )
> > ~   system method.to_s + " " + args.join(' ')
> > ~ end
> >
> > and you could perhaps call
> >
> > ~ dir %w{ *.rb }
> >
> > ++ for the method missing comment !
> 
> ... etc.
> 
> On the subject (if not the Subject:): Have anybody played with make it
> possible to use Ruby for running sort-of shell scripts?  Ie, including
> pipes etc.  As it is, there are some programs that call a lot of shell
> commands that I write in sh instead of Ruby, and where I'd really like
> to do them in Ruby.
> 
> The starting point I see for something like this would be to override
> method_missing like above, but make it return an object where | is
> overridden, and that have handling of shell return codes.
> 
> The challenges I see here is
> - It's not possible to override the trueness/falseness of an object,
> so we'd need to call a special method to find out if a command failed
> or passed
> - It is hard to implement -e (give an error if a complete shell line
> fails - but not if we have an fail || true).  Maybe trace_func could
> be of help here, though.
> 
> Eivind.
> 
>