From: Michael Greenly <mgreenly@...>
Date: 2007-01-02T04:52:57+09:00
Subject: Re: Multiple Versions of Ruby on same machine

Robert James wrote:
> I'd like to include a complete version of Ruby, including all the
> necessary libs, in the source tree for our internal app.  That will
> allow our unit tests/QA procedure/app deployment scripts to take
> responsibility for upgrades to Ruby as well.
> 
> To do this, I of course need to include /usr/lib/ruby/* and
> /usr/bin/ruby.  And to set the PATH to use our local Ruby.
> 
> But it seems that I need to do more:
> $ irb
> irb(main):001:0> $:
> => ["/usr/lib/ruby/site_ruby/1.8",
> "/usr/lib/ruby/site_ruby/1.8/i386-linux", "/usr/lib/ruby/site_ruby",
> "/usr/lib/site_ruby/1.8", "/usr/lib/site_ruby/1.8/i386-linux",
> "/usr/lib/site_ruby", "/usr/lib/ruby/1.8",
> "/usr/lib/ruby/1.8/i386-linux", "."]
> 
> Where are those paths located?  strings ruby didn't turn them up.  I
> need to be able to tell it to use the app's private ruby installation.
> 
> In general, has anyone done anything like this?  What was their
> experience?  How would you recommend going about doing this?

It's compiled in at build time, I think.  Check out ruby config.

I think I'd try building it from source and installing in a custom 
directory for example /opt/myruby.  Then when you install it on the 
target machines you put it in the same place.

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