ROR dev on Different Ruby versions

Hi,

First I would like to ask if someone could give me the direct link to
the mailing list this forum mirrors. This is so I can do searches
directly and not bother folks with repeat questions.

Now my question:
I recently installed a ROR app built on Ruby 1.8.2 and moved it to ROR
on Ruby 1.8.4. I got a few errors and had to regenerate my app in the
later and copy the App files and a few other directories from the
former.

These two versions are on 2 different machines.

I was wondering whether it Is it possible to install two versions of
Ruby say 1.8.2 and 1.8.4 along with rails on the same machine and
somehow switch over between ruby versions to test the apps ? Or can you
suggest best practices when dealing with these types of situations ? Off
the bat, I think that I could setup virtual machines on another computer
and load up an installation for each machine… but are there other
(better) ways ?

TIA,
Tuka

PS: I am devlopeng in the windows environment…

Tuka O. wrote:

I was wondering whether it Is it possible to install two versions of
Ruby say 1.8.2 and 1.8.4 along with rails on the same machine and
somehow switch over between ruby versions to test the apps ?

You can freeze rails to a specific version for a specific application.

http://www.google.com/search?q=freeze+rails

You may be able to install multiple versions of the One-Click Ruby
installer and create .bat files to setup the path differently depending
on which version you wanted to use. But I imagine there could be a lot
of problems trying to get that working.

Matt G.

Tuka O. wrote:

former.

Well, I haven’t met a situation where a particular version of Ruby
hasn’t worked for me (I’ve used 1.8.2 and 1.8.4 interchangeably), but in
case it does pop up… Why not install / compile the two ruby versions
into two separate directories, then simply alter the “shebang” line in
the application that requires Ruby 1.8.2 to point to the alternate
version of ruby on your disk?

(the shebang, if you don’t know, is the #!/usr/local/bin/ruby,
#!/c:/ruby/bin/ruby etc… line at the beginning of your dispatch.*
files in the public directory.

You’d also have to explicitly type the whole path to ruby before
script/server etc on windows (i.e. c:\ruby\1.8.2\bin\ruby
script/server).

The mailing list can be found at http://rubyonrails.org/community along
with some other useful stuff (like the official Wiki).


Henning K.
Rails Foundry
http://railsfoundry.com/

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