Is it possible to run my Rails app on Heroku with Ruby 1.9.3? If so, how?

Question

I tried this tip: https://github.com/thoughtbot/laptop/pull/14#issuecomment-3192270 .

On deploy I see

-----> Using RUBY_VERSION: ruby-1.9.3-p0
         


        

Answer 1

Right, so Ruby 1.9.3 is definitely possibly. As you said hacky/experimental solutions were accepted - this is definitely one of them.

It's actually really simple;

1. Enable Heroku Labs's user_env_compile feature for your application.

2. Set a heroku config variable to RUBY_VERSION to ruby-1.9.3-p0 (heroku config:add RUBY_VERSION=ruby-1.9.3-p0)

3. ENSURE that the heroku PATH config variable has bin at the front (heroku config:add PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin)

When you next deploy you should see your application using 1.9.3 - the deployment output will show this too;

-> Heroku receiving push
-----> Ruby/Rails app detected
-----> Using RUBY_VERSION: ruby-1.9.3-p0
-----> Installing dependencies using Bundler version 1.1.rc.7
Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment