Creates a Docker image with Ruby, rubygems and bundler.

Before you go building 2.0.0-p247, you can already use my image by running:

docker pull binaryphile/ruby:2.0.0-p247

Also, before you ask where the Dockerfile is, there isn't one. dockerfile.sh is a shell script which performs the steps that a Dockerfile would, which is why it is named that way.

• Copy sample.env to .env
• Edit .env and set:
  • RUBY_VERSION: the version of Ruby you want to install including patch level, e.g. 2.0.0-p247
  • RI_VERSION: the version of ruby-install to use
  • CR_VERSION: the version of chruby to use
• run ./dockerfile and wait for it to finish
• determine the id of the finished container with docker ps -l (use sudo if need be)
• (optional) commit the image: docker commit [id] [your-index-name]/[your-repo-name][:optional tag]
• (optional) push your image: docker push [your-index-name]/[your-repo-name]

The resulting image will contain a ruby interpreter installed in /opt/rubies/[version], according to the ruby-install method.

You will want to run chruby before trying to use ruby in the container. You'll need to do this any time you create a ruby process inside the container. The standard way is two commands:

• source /usr/local/share/chruby/chruby.sh
• chruby [version], e.g. chruby 2.0