From: Stefano Crocco <stefano.crocco@...>
Date: 2008-01-23T21:50:49+09:00
Subject: Re: rubygems install in HOME for Ruby 1.9 ???

Alle Wednesday 23 January 2008, unbewusst ha scritto:
> i've installed rubygems 0.9.5 with ruby 1.9 lying in my HOME but i get
> only a gems/1.8/ directory.
>
> then i think i didn't use to correct version of rubygems ? is that
> right ?
>
> what is the best way to get rubygems working with ruby 1.9 installed
> in HOME ???
>
> i'm running over Mac OS X 10.4.11
>
> apart from apple's ruby i do have also a ruby "MacPort" under /opt...
>
> Yvon

I installed ruby 1.9 alongside ruby 1.8 on my linux system without any 
trouble. I don't know Mac OS X, but I heard is Unix based, so I think you can 
use the steps I took, at least as a starting point.

Ruby 1.8 and rubygems were installed using my OS package manager, under the 
/usr directory. So I had:

/usr/bin/ruby18
/usr/bin/ruby (a symlink to /usr/bin/ruby18)
/usr/bin/gem18
/usr/bin/gem (a symlink to /usr/bin/gem18)
/usr/lib/ruby/1.8
/usr/lib/ruby/gems/1.8

I decided to install ruby 1.9 in the /usr/local directory. You can choose any 
other directory, of course, but you should make sure that it has a bin 
subdirectory which is in you PATH. Moreover, I decided to install it using 
appending the '19' suffix to the name of the programs, so that I could call 
ruby 1.8 (which should remain the default one) with ruby and the new one with 
ruby19.

After downloading and extracting the ruby-1.9 tarball, I issued the following 
commands:

cd ruby-1.9.0-0
./configure --prefix=/usr/local --program-suffix=19
make
sudo make install

With this, the following files and directories (among others) were created:

/usr/local/bin/ruby19
/usr/local/bin/irb19
...
/usr/local/lib/ruby/1.9

I then downloaded the tgz package (version 1.0.1) from the rubygems rubyforge 
page (http://rubyforge.org/frs/?group_id=126&release_id=17305), extracted it 
and did:

cd rubygems-1.0.1
sudo ruby19 setup.rb

It's important to notice I had to use ruby19 to install rubygems, not ruby. 
This installed the rubygems .rb files in /usr/local/lib/ruby/site_ruby/1.9.0 
and created the file /usr/local/bin/gem19.

To check that everything worked, I tried installing the rake gem:

sudo gem19 install rake

(again note, I called the 1.9 version of gem)

This created the directory /usr/local/lib/ruby/gems/1.9.0 and installed rake 
under it.

I hope this helps

Stefano