Upgrading form Ruby 1.9.2 to 1.9.3, Should I re-install all gems?

Question

I would like to avoid re-installing the gems if possible while doing the upgrade from 1.9.2 to 1.9.3. Is there an option as such while using RVM to manage ruby versions?

Answer 1

you can run

rvm upgrade 1.9.2 1.9.3

this will:

• install latest 1.9.3 (if needed)
• copy all gemsets
• run gem pristine on every single gem and report those that failed
• ask you if you want to delete the old ruby

the step with gem pristine is required as there might be changes between rubies that would break stuff - especially that gem creators use internal ruby stuff.

Answer 2

I don't think so. The gems are installed on top of the specific version so I think you will need to reinstall. However with rails you should be able to just bundle install

Best Practice will also to be to create a gemset at the root of your project.

Here's mine:

$ cat .rvmrc 

rvm use ruby-1.9.3-p125@my_local_app_name --create

Then when you cd into it it will set the ruby and rails versions for you. You will see a nice green status line showing you that, eg

Using /Users/durrantm/.rvm/gems/ruby-1.9.3-p125 with gemset dmworkflow