A different rubygem version for each ruby version in rvm

Question

I have ruby 1.8.7 and 1.9.3 installed by rvm. For each ruby version, I'd like to:

• use gem 1.3.7 for ruby 1.8.7
• use gem 1.8.x for ruby 1.9.3

How can I set the above in rvm?

Answer 1

$ rvm use 1.8.7
$ rvm rubygems 1.3.7
$ rvm use 1.9.3
$ rvm rubygems latest-1.8
$ gem -v
1.8.24
$ rvm use 1.8.7
$ gem -v
1.3.7