How to set the default gemset in RVM with Rails & Heroku

Question

I need to specify a ruby version in my Gemfile for Heroku:

ruby '2.1.1'

That works as expected. However, it messes with my local terminal as well. I try to set the default ruby version and gemset in RVM with:

$ rvm --default use ruby-2.1.1@rails4
Using /Users/scott/.rvm/gems/ruby-2.1.1 with gemset rails4
$ rvm gemset list

gemsets for ruby-2.1.1 (found in /Users/scott/.rvm/gems/ruby-2.1.1)
   (default)
   global
=> rails4

Seems fine and it works as expected. However, if I open up another terminal shell I get this:

Last login: Fri Mar 14 16:54:23 on ttys009
RVM used your Gemfile for selecting Ruby, it is all fine - Heroku does that too,
you can ignore these warnings with 'rvm rvmrc warning ignore /Users/scott/code/Gemfile'.
To ignore the warning for all files run 'rvm rvmrc warning ignore allGemfiles'.

$ rvm gemset list

gemsets for ruby-2.1.1 (found in /Users/scott/.rvm/gems/ruby-2.1.1)
=> (default)
   global
   rails4

I want it to use the rails4 gemset always! How can I do this?

Answer 1

Only way you could do it is to add two files to your application: .ruby-version and .ruby-gemset and add 2.1.1 in the .ruby-version file and rails4 in the .ruby-gemset file.

You can also do this on your command line with:

echo 2.1.1 > .ruby-version

and

echo rails4 > .ruby-gemset

And that will create the files for you with the version 2.1.1 and the gemset rails4

So whenever you open a new terminal, rvm will use ruby 2.1.1 and gemset rails 4

Check out more on rvm documentation

Hope this helps