Ubuntu 14.04 install chruby for 2.2.2

install-chruby-2.2.2.sh

#!/bin/bash

sudo apt-get install -y build-essential libffi-dev libgdbm-dev libncurses5-dev libreadline-dev libssl-dev libyaml-dev zlib1g-dev
pushd /tmp

wget -O chruby-0.3.9.tar.gz https://github.com/postmodern/chruby/archive/v0.3.9.tar.gz
tar -xzvf chruby-0.3.9.tar.gz
cd chruby-0.3.9/
sudo make install

cd /tmp

wget http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.2.tar.bz2
tar -xjvf ruby-2.2.2.tar.bz2
cd ruby-2.2.2
./configure --prefix=/opt/rubies/ruby-2.2.2
make
sudo make install

popd

echo '# ruby - chruby' >> ~/.bashrc
echo 'source /usr/local/share/chruby/chruby.sh' >> ~/.bashrc
echo 'chruby ruby-2.2.2' >> ~/.bashrc