My notes on Rails 2.3 to 3.2 upgrades - with client specific notes

Rails 2.3 to 3.2 upgrade

List of steps I take to upgrade an app from Rails 2.3 to 3.2 (generically speaking with many assumptions)

Step 1 - Add Bundler and a Gemfile to existing Rails 2.3 application.
 - by-product = clean up gems being used.

Step 2 - 





Step 1 fine-tuned for client (internal):

Make sure your rails app dir has group write permissions (so 'dev' user can write Gemfile.lock file)

1. sudo to 'dev' and go to your rails app dir (i.e. /srv/dev/[yourusername]-dev.###.com)
1. Uninstall all existing gems.
    * Here's a quick way to uninstall all gems. -note by craig, to one-liner
    * `$ gem list | cut -d" " -f1 | xargs gem uninstall -aIx`
1. Install bundler and run it to install gems in the Gemfile
    * `$ gem install bundler`
    * `$ bundle`
1. Build passenger:
    * `$ passenger-install-apache2-module`
1. Restart apache:
    * `$ sudo service httpd restart`