Rails - Jan 2005 - How does rails know which version to run at cmdline ?

Question:

How does versioning happen in rails?  I see under
C:\ruby\lib\ruby\gems\1.8\gems that there are multiple versions, since
I''ve been doing gem updates.  What determines which version is run
when I do a cmdline for rails to make an app?

ex:  C:\rails railstest

Thanks in advance!

- Thad

On Wed, 5 Jan 2005 14:57:55 -0600, Thad Guidry
<thadguidry-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> How does versioning happen in rails?  I see under
> C:\ruby\lib\ruby\gems\1.8\gems that there are multiple versions, since
> I''ve been doing gem updates.  What determines which version is run
> when I do a cmdline for rails to make an app?
The rails script is just a stub. It loads rails via gems, and is set up
to use the latest version found. 

After looking through the code, I realized you can force a specific version. 
If the first word on the command-line is enclosed in underscores, this will be 
used as a version specification:

$ rails _0.9.2_ /my/new/app

But this doesn''t seem to change the environment, so the latest version
will still be loaded inside the app.

/Niklas