Overview of the Ruby Version Manager (http://rvm.beginrescueend.com) by Wayne Seguin.

1. RVM
Ruby Version Manager
Brian Turnbull
NH Ruby — 16 November 2009

2. Cut Rubies With Ease
http://rvm.beginrescueend.com
#rvm on irc.freenode.net

3. Getting Started
‣ Install as a Gem
‣ Clone Git repository
‣ Source tarball
Flickr: “Egg with directional shadow and background” by Tsja
http://www.flickr.com/photos/10451396@N00/337315801

4. Make it Work
## End of ~/.bash_profile
if [[ -s $HOME/.rvm/scripts/rvm ]] ; then
source $HOME/.rvm/scripts/rvm
fi
## /etc/rvmrc
## ~/.rvmrc
export rvm_archflags="-arch x86_64"
export rvm_make_flags="-j 3"
export rvm_install_on_use_flag=1
Flickr: “Martillo / Hammer” by Kaworu Koneru
http://www.flickr.com/photos/kaworukoneru/2230794481

5. What Now?
Learn It ➡ $ rvm list --all
Live It ➡ $ rvm install 1.8.7
Love It ➡ $ rvm 1.8.7

6. What Just Happened?
$ rvm 1.8.7
$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) ...
$ which ruby
/Users/brian/.rvm/ruby-1.8.7-p174/bin/ruby
$ rvm system
$ which ruby
/usr/bin/ruby

7. Be Specific
$ rvm list
ruby-1.8.6-p383: ruby 1.8.6 (2009-08-04 patchlevel 383) ...
ruby-1.8.7-p173: ruby 1.8.7 (2009-06-08 patchlevel 173) ...
=> ruby-1.8.7-p174: ruby 1.8.7 (2009-06-12 patchlevel 174) ...
=> (default) ruby-1.8.7-p174: ruby 1.8.7 (2009-06-12 patchlevel 174) ...
system: ruby 1.8.7 (2008-08-11 patchlevel 72) ...
$ rvm 1.8.7-p173
$ ruby -v
ruby 1.8.7 (2009-06-08 patchlevel 173) ...
$ rvm 1.8.7
$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) ...

8. Playing Favorites
$ rvm 1.8.7-p174 --default
$ rvm 1.8.6-p383
$ ruby -v
ruby 1.8.6 (2009-08-04 patchlevel 383) ...
$ rvm default
$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) ...

9. Make It Shiny
$ rvm 1.8.7-p174
$ gem install net-ssh
Successfully installed net-ssh-2.0.15
1 gem installed
$ rvm 1.8.6-p383
$ irb
ruby-1.8.6-p383 > require 'net/ssh'
LoadError: no such file to load -- net/ssh

10. 1.8.7
Gems
Gems
1.8.6

11. 1.8.7
Gems gem
sync
Gems
1.8.6

12. 1.8.7
Gems dg
uem
mps
/yoa
l ncd
Gems
1.8.6

13. Named Gem Sets
1.8.7
Compartmentalize a Default Gem
‣ set of gems under a
Ruby interpreter
Gems Set
Gem
Set

14. Named Gem Sets
1.8.7
t
Se
Compartmentalize a Default Gem
‣
em
set of gems under a Gems Set
Ruby interpreter G
Gem
Set

15. Tricks
$ rvm 1.8.6,1.8.7,1.9.1 rake spec
... lotsa passing tests ...
$ rvm 1.8.6,1.8.7,1.9.1 --json rake spec
... lotsa passing tests ...
... and a nice JSON summary ...
$ PS1="$PS1$(~/.rvm/bin/rvm-prompt) "
$ rvm update [--head]
$ bundle_dir = ENV["GEM_PATH"] ||
%x{source ~/.rvm/scripts/rvm && rvm gemdir}

16. Demo!
Flickr: “Crash & Burn” by Handforged
http://www.flickr.com/photos/handforged/292093553

17. RVM
Ruby Version Manager
Brian Turnbull
NH Ruby — 16 November 2009