RVM allows installing and managing multiple Ruby environments and gemsets. The author had a mismatch between their Ruby and Rails versions that caused issues. They installed RVM and used it to install Ruby 1.8.6 and keep gems separate for different projects. Bundler works with RVM to specify gems in a Gemfile and ensure consistent dependencies. Creating an .rvmrc file sets the Ruby version and gemset for a project directory.

1. RVM, Bundler and
Ruby Tracker
@keithpitty
@cockatoo_sw

2. Earlier this year I had a challenge...

3. Mismatch
Rails
1.2.6
Ruby Ruby
1.8.7 1.8.6
Machine Needed

4. I had Ruby 1.8.7 in /usr/local

5. I had all gems installed via sudo

7. Installed RVM
http://rvm.beginrescueend.com/rvm/install/
with help from Wayne Seguin via #rvm

8. Installed & used rubies
rvm install 1.8.6
rvm 1.8.6

9. rvm list
rvm info
rvm help

10. More recently
upgraded a Rails 2.3 app
to run on Ruby 1.9

11. Used RVM with gemsets this time
to keep gem versions discrete

12. And also...

14. Guide for setting up Bundler
with Rails 2.3 at
http://gembundler.com/rails23.html

15. specify gems in Gemfile

16. source "http://rubygems.org"
gem "rails", "~> 2.3.8"
gem "bundler"
gem "whenever", "0.4.0"
gem "aasm"
gem "mysql"
gem "ar-extensions"
gem "paperclip"
gem "paper_trail"

17. group :development do
gem "rubyrep"
end
group :test do
gem "rspec"
gem "rspec-rails"
end

18. group :production do
gem "net-ldap"
gem "activedirectory",
:git => "git://github.com/keithpitty/activedirectory.git",
:tag => "v1.0.3"
end

19. bundle install
bundle lock
bundle package
see Bundler doco for more

20. and now for a treat...

21. .rvmrc

24. Contents of .rvmrc
ruby version gemset name
rvm 1.9.1@foo

25. What’s so special about .rvmrc?

26. cd appname
If the directory contains .rvmrc
the RVM sandbox will be set!

27. RVM, Bundler & .rvmrc -
What’s needed in a nutshell?

28. rvm 1.9.1
rvm gemset create foo
rvm gemset use foo
gem install bundler (if necessary)
bundle install
echo “rvm 1.9.1@foo” > .rvmrc

29. • Note: RVM’s global gemset is useful for
commonly used gems
• See the RVM doco for more details

32. source "http://rubygems.org"
gem 'sinatra'
gem 'haml'
gem 'RedCloth'
gem 'pony'
gem 'builder'
gem 'toadhopper-sinatra'

34. And now, before I give you some references...

35. some shameless self-promotion...

37. www.cockatoosoftware.com.au
@cockatoo_sw
@keithpitty
http://keithpitty.com/blog
http://github.com/keithpitty

38. References
• http://rvm.beginrescueend.com/
• http://gembundler.com/
• http://rubytracker.com/
• http://lindsaar.net/2010/3/31/
bundle_me_some_sanity

39. + +
= WIN!