call bundle in capistrano + rbenv ( capstrano + rbenv , bundle问题）

it's very easy.

1. make sure you have "rbenv" and a ruby version (e.g. 1.9.3) installed in remote server

2. in your config/deploy.rb (capistrano file) 

require 'capistrano-rbenv'

3. in your Gemfile: 

gem 'capistrano-rbenv', '1.0.1'

that's it. to debug if it works, just run: 

$ cap shell

cap> which ruby
 ** [out :: 10.103.13.74] /root/.rbenv/shims/ruby
cap> ruby -v
 ** [out :: 10.103.13.74] ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux]