manage_ruby_version.sh

###rbenv, rbenv-rehash, rebenv-bundler  http://dan.carley.co/blog/2012/02/07/rbenv-and-bundler/
###install ruby-build
###rbenv specifies local version, .ruby-version
###create .ruby-gemset, this will install those gems into this ruby version, and this gemset, under this ruby version.

#install rbenv
git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
source ~/.bash_profile

#install ruby-build
git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bash_profile
exec $SHELL

#never run rbenv rehash
git clone https://github.com/sstephenson/rbenv-gem-rehash.git ~/.rbenv/plugins/rbenv-gem-rehash

#install rbenv-bundler
git clone https://github.com/carsomyr/rbenv-bundler.git  ~/.rbenv/plugins/bundler
#install rbenv-gemset
 git clone git://github.com/jf/rbenv-gemset.git ~/.rbenv/plugins/rbenv-gemset
#https://github.com/jf/rbenv-gemset