Installs a good Ruby

install-ruby

# The version of Ruby to be installed
ruby_ver="2.2.3"

# The base path to the Ruby
ruby_home="/usr/local"

# Enable truly non interactive apt-get installs
export DEBIAN_FRONTEND=noninteractive

apt-get update
apt-get -y install git-core
apt-get -y install curl
apt-get -y install build-essential
apt-get -y install zlib1g-dev libssl-dev libreadline-dev
apt-get -y install libxml2-dev libxslt-dev # needed by nokogiri/capybara

# Use ruby-build to install Ruby
clone_dir=/tmp/ruby-build-$$
git clone https://github.com/sstephenson/ruby-build.git $clone_dir
$clone_dir/bin/ruby-build "$ruby_ver" "$ruby_home"
rm -rf $clone_dir
unset clone_dir