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+# Supported tags and respective `Dockerfile` links
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+
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+- [`1.7`, `1.7.15`, `latest` (*1.7/Dockerfile*)](https://github.com/cpuguy83/docker-jruby/blob/9d4071a485dc1e0688dabaa7b6baaf679180d55b/1.7/Dockerfile)
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+- [`1.7-onbuild`, `1.7.15-onbuild`, `onbuild` (*1.7/onbuild/Dockerfile*)](https://github.com/cpuguy83/docker-jruby/blob/53d1d6ec2bc99ef884d60aa756861234710f2bbc/1.7/onbuild/Dockerfile)
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+
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+# What is JRuby?
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+
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+JRuby (http://www.jruby.org) is an implementation of Ruby
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+(http://www.ruby-lang.org) on the JVM.
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+
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+Ruby is a dynamic, reflective, object-oriented, general-purpose, open-source
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+programming language. According to its authors, Ruby was influenced by Perl,
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+Smalltalk, Eiffel, Ada, and Lisp. It supports multiple programming paradigms,
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+including functional, object-oriented, and imperative. It also has a dynamic
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+type system and automatic memory management.
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+
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+> [wikipedia.org/wiki/Ruby_(programming_language)](https://en.wikipedia.org/wiki/Ruby_(programming_language))
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+
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+JRuby leverages the robustness and speed of the JVM while providing the same
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+Ruby that you already know and love.
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+With JRuby you are able to take advantage of real native threads, enhanced
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+garbage collection, and even import and use java libraries.
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+
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+# How to use this image
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+
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+## Create a `Dockerfile` in your Ruby app project
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+
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+ FROM jruby:.1.7.15-onbuild
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+ CMD ["./your-daemon-or-script.rb"]
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+
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+Put this file in the root of your app, next to the `Gemfile`.
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+
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+This image includes multiple `ONBUILD` triggers which should be all you need to
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+bootstrap most applications. The build will `COPY . /usr/src/app` and `RUN
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+bundle install`.
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+
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+You can then build and run the Ruby image:
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+
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+ docker build -t my-ruby-app .
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+ docker run -it --name my-running-script my-ruby-app
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+
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+## Run a single Ruby script
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+
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+For many simple, single file projects, you may find it inconvenient to write a
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+complete `Dockerfile`. In such cases, you can run a Ruby script by using the
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+Ruby Docker image directly:
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+
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+ docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp jruby:1.7.15 jruby your-daemon-or-script.rb
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+
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+# License
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+
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+View [license information](https://github.com/jruby/jruby/blob/master/COPYING)
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+for the software contained in this image.
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+
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+# User Feedback
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+
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+## Issues
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+
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+If you have any problems with, or questions about this image, please contact us
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+ through a [GitHub issue](https://github.com/cpuguy83/docker-jruby/issues) or via the IRC
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+channel `#docker-library` on [Freenode](https://freenode.net).
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+
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+## Contributing
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+
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+You are invited to contribute new features, fixes, or updates, large or small;
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+we are always thrilled to receive pull requests, and do our best to process them
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+as fast as we can.
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+
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+Before you start to code, we recommend discussing your plans
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+through a [GitHub issue](https://github.com/cpuguy83/docker-jruby/issues), especially for more ambitious
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+contributions. This gives other contributors a chance to point you in the right
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+direction, give you feedback on your design, and help you find out if someone
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+else is working on the same thing.
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Tianon Gravi