jakcharlton/1.9.3.md

## 1.9.3.md

      
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              1.9.3.md
            
          
    http://railsapps.github.com/rails-heroku-tutorial.html
Ruby 1.9.3 and Rails 3.2 on Heroku
Heroku’s newest stack, “Celadon Cedar,” supports Rails 3.2 but installs Ruby 1.9.2 by default. Ruby 1.9.3 is recommended for Rails 3.2.
You can configure the Heroku environment to use Ruby 1.9.3.
Note: Heroku makes it clear that Ruby 1.9.3 on Heroku is experimental, which means “no support, the ruby_version will change in the future, and this feature may change or be removed without warning.” In response to an inquiry on January 31, 2012, Heroku said, “there is no timeline yet” to fully support Ruby 1.9.3.
Install the heroku-labs plugin:
$ heroku plugins:install https://github.com/heroku/heroku-labs.git
Enable the “user_env_compile” feature (see Heroku’s documentation):
$ heroku labs:enable user_env_compile -a myapp
Set the RUBY_VERSION variable:
$ heroku config:add RUBY_VERSION=ruby-1.9.3-p0
Set the Heroku PATH config variable to include “bin”:
$ heroku config:add PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin
(Yes, the library path includes “1.9.1”: that’s not a typo.)
You can check that everything has been configured correctly by running:
$ heroku config
Documentation for Rails 3.0 and Rails 3.1
Heroku has no specific documentation for Rails 3.2 but the following articles on Rails 3.0 and Rails 3.1 are helpful:
Getting started with Rails 3 on Heroku/Cedar
Rails 3.1 on Heroku Cedar.
Note: Prior to Rails 3.1.0.rc5, Heroku required an additional gem therubyracer-heroku. This gem is no longer needed for Rails 3.2 and should not be used.