nextcloud-docs/ruby

What is Ruby

Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. It was designed and developed in the mid-1990s by Yukihiro "Matz" Matsumoto in Japan.

According to its authors, Ruby was influenced by Perl, Smalltalk, Eiffel, Ada, and Lisp. It supports multiple programming paradigms, including functional, object-oriented, and imperative. It also has a dynamic type system and automatic memory management.

wikipedia.org/wiki/Ruby_(programming_language)

How to use this image

Create a Dockerfile in your ruby app project

FROM ruby:onbuild
CMD ["./your-daemon-or-script.rb"]

Put this file in the root of your app, next to the Gemfile.

This image includes multiple ONBUILD triggers so that should be all that you need to bootstrap most applications. The build will ADD . /usr/src/app and RUN bundle install.

Then build and run the ruby image.

docker build -t my-ruby-app .
docker run -it --name my-running-script my-ruby-app

Run a single ruby script

For many single file projects, it may not be convenient to write a Dockerfile for your project. In such cases, you can run a ruby script by using the ruby docker image directly.

docker run -it --rm --name my-running-script -v $(pwd):/usr/src/myapp -w /usr/src/myapp ruby ruby your-daemon-or-script.rb