From: Jeremy Tregunna <jtregunna@...>
Date: 2005-05-30T14:04:06+09:00
Subject: Re: How to find ruby?

On 29-May-05, at 7:05 PM, Mark Probert wrote:

>
> Hi ..
>
> I am not sure of the best way of going about finding the location of 
> Ruby for
> a shebang line (*nix execution).
>
> My scripts don't always have control of where Ruby might be installed 
> (that is
> the provenance of the destination organization's sysadmin).  Some 
> examples
> that I have run across include
>
>  /usr/local/bin/ruby
>  /usr/bin/ruby
>  /opt/ruby1.8/bin/ruby
>  etc.
>
> So, what do other people normally do when they have this kind of 
> situation
> when it comes to the shebang line?  I'd rather do it in some generic 
> manner
> rather than have a substitution script run at install time (though 
> that is an
> option).

Most modern shells will accept multiple arguments on a shebang line 
(some older shells won't, but you shouldn't have a problem).

Use:

#!/path/to/env ruby

where /path/to/env is the location of env(1) (usually /usr/bin).

> -mark.  (probertm at acm dot org)

--
Jeremy Tregunna
jtregunna@blurgle.ca