From: Yuri Klubakov <yuri.mlists@...>
Date: 2007-09-02T14:23:05+09:00
Subject: Re: Ruby 1.8 and 1.9

On 8/31/07, Cliff Rowley <cliffrowley@gmail.com> wrote:
> I've just successfully compiled Ruby 1.9 under Cygwin (which was
> surprisingly easy).  Is there a (simple) way to allow 1.8 and 1.9 to
> co-exist, allowing me to switch between them at will?
>
> Thanks
>
> Cliff

This is how I would switch between different ruby versions under Windows:
- Install Ruby 1.8 into the default c:\ruby directory.
- Rename c:\ruby to c:\ruby18
- Install Ruby 1.9 into the default c:\ruby directory.
- Rename c:\ruby to c:\ruby19
- Create a junction point to the version you want to use:
    c:\> junction c:\ruby c:\ruby18
- To switch:
    c:\> junction -d c:\ruby
    c:\> junction c:\ruby c:\ruby19

-- 
yura.