Installing ruby into a Docker image

Dockerfile

FROM cws/base:2013-07-01
MAINTAINER Raul E. Rangel "[email protected]"

# Download the ruby-build code
RUN \curl -L https://github.com/sstephenson/ruby-build/archive/v20130518.tar.gz | tar -zxvf - -C /tmp/

# Install ruby-build
RUN cd /tmp/ruby-build-* && ./install.sh && cd / && rm -rfv /tmp/ruby-build-master

# Install ruby
RUN ruby-build -v 1.9.3-p429 /usr/local

# Install gems
RUN gem install bundler rubygems-bundler --no-rdoc --no-ri

# Regenerate binstubs
RUN gem regenerate_binstubs

Thanks @grosser and @ismell, it helped !