With chruby, why won't ruby-2.2.0 in .ruby-version work, whereas chruby ruby-2.2.0 will?
% whoami
mark
% sudo su myapp
% cd /home/www/myapp/
% whoami
chruby: unknown Ruby: ruby-2.2.0
myapp
% cat .ruby-version
ruby-2.2.0
% which ruby
/usr/local/bin/ruby
% chruby ruby-2.2.0
% which ruby
/home/www/myapp/.rubies/ruby-2.2.0/bin/ruby 
Full transcript of Ruby on Rails deployment:
 
    