How to get RVM to set correct gem path

rvm

On a clean Mac OS X "Snow Leopard" install, I have a problem with RVM: It sets the Ruby path correctly but doesn't set the gem path. When I start a Rails server it mixes versions which doesn't work.

To illustrate:

$ rvm system
$ which ruby
/usr/bin/ruby
$ which rails
/usr/bin/rails
$ rvm use 1.9.2-head
Using /Users/m/.rvm/gems/ruby-1.9.2-head
$ rvm gem list

LOCAL GEMS
[…]
rails (3.0.7)
[…]

$ which ruby
/Users/m/.rvm/rubies/ruby-1.9.2-head/bin/ruby
$ which rails
/usr/bin/rails

$ echo $GEM_PATH
/Users/m/.rvm/gems/ruby-1.9.2-p180:/Users/m/.rvm/gems/ruby-1.9.2-p180@global

$ echo $PATH
/Users/m/.rvm/gems/ruby-1.9.2-p180/bin:/Users/m/.rvm/gems/ruby-1.9.2p180@global/bin:/Users/m/.rvm/rubies/ruby-1.9.2p180/bin:/Users/m/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin

Any ideas what might be wrong?

Best Answer

So after 1 1/2 days of torture, reading through at least 50 posts, and installing RVM, Ruby and Rails multiple times, I am finally able to use Rails in my RVM install.

This was the last series of events that I did after installing RVM and Ruby the last time and then it worked:

I removed these from .gemrc so back up your file if you do this:

  • gemhome: /home/[user]/ruby/gems
  • gempath: []
  • --remote

then use 

rvm use 1.9.3 --default

then 

gem install rails

It seems the trick was:

  1. Change the .gemrc file.
  2. Do not create and use a gemset (rvm use 1.9.3@rails3) before installing Rails.
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