ruby2.0 centos/rhel

ruby2.0-rhel.sh

#!/usr/bin/env bash
cd /tmp
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -Uvh epel-release-6-8.noarch.rpm

yum -y update
yum -y groupinstall "Development Tools"
yum -y install libxslt-devel libyaml-devel libxml2-devel gdbm-devel libffi-devel zlib-devel openssl-devel libyaml-devel readline-devel curl-devel openssl-devel pcre-devel git memcached-devel valgrind-devel mysql-devel ImageMagick-devel ImageMagick

version=2.0.0-p247
cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/2.0/ruby-$version.tar.gz 
tar zxvf ruby-$version.tar.gz
cd ruby-$version
./configure

curl -fsSL "https://github.com/ruby/ruby/commit/0d58bb55985e787364b0235e5e69278d0f0ad4b0.patch" | filterdiff -x a/ChangeLog -x a/test/openssl/test_pkey_ec.rb | patch ext/openssl/ossl_pkey_ec.c

make
make install

version=2.0.7
cd ..
wget http://production.cf.rubygems.org/rubygems/rubygems-$version.tgz
tar zxvf rubygems-$version.tgz
cd rubygems-$version
/usr/local/bin/ruby setup.rb

alternatives --set ruby /usr/local/bin/ruby
alternatives --set gem /usr/local/bin/gem
alternatives --set erb /usr/local/bin/erb
alternatives --set irb /usr/local/bin/irb

gem install bundler --no-ri --no-rdoc