README.md

Install rbenv and ruby-build to Amazon Linux (cloud-init).

1. Copy & paste content of user-data.sh to EC2 RunInstances user-data
2. Then, logging in to EC2 instance as ec2-user and run install-ruby.sh.

install-ruby.sh

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

# Install and enable ruby-1.9.3-p448
rbenv install 1.9.3-p448 && rbenv global 1.9.3-p448

user-data.sh

#!/bin/sh

# Install developer tools
yum install -y git gcc make readline-devel openssl-devel libxml2-devel libxslt-devel