JrmvnRunner

If you are looking for the easy way to run your JRuby application and to indicate the gem and jar dependencies in a single place, this library might be one of the acceptable options for you. Please take a look at the alternatives first, like JBundler and Doubleshot. Jrmvnrunner simply creates the temporary Gemfile and pom.xml for your project according to your setup and then invokes bundle install and mvn install accordingly. This is a very simple and transparent approach to collect all the required dependencies specified in a single file.

Check out this blog post to see how this library can be used.

Why?

Doubleshot looks ok, but it requires java 1.7+. JBundler is good, but sometimes does not do what you want.

What it gives

You can create the Jrmvnrunner file at the root level of your project with the following content:

project 'mygroup:myproject:0.1'

Pomfile do
    source 'http://maven.smecsia.me'
    jar 'commons-lang:commons-lang:2.6:jar'
end

Gemfile do
    source :rubygems
    gem 'json'
    gem 'rspec', '~> 2.12.0'
    gem 'rake', '10.0.3'
    gem 'activesupport', '~> 3.2.8'
    gem 'activerecord', '~> 3.2.8'
    gem 'cucumber'
end

Then you can execute:

jrmvnrun exec cucumber

This will execute a command with the full jar dependencies list in the classpath, so you can use them inside your ruby code.

Programmatic setup

You can also setup Jrmvnrunner to use your environment just right from the code by adding the following code to your environment script (this could be any ruby script that loads first):

require 'rubygems'
require 'jrmvnrunner'

Jrmvnrunner.init!

This will allow you to run the simple commands without the necessity to run them using "jrmvnrun exec CMD". For example, you can add this code to the features/support/env.rb and run the particular "rake features" command.

How to install

jruby -S gem install jrmvnrunner

Requirements

Jrmvnrunner requires JDK 1.6+, Maven 3+, Jruby 1.7+ installed. It will look at your PATH for mvn, jruby, jgem and bundle executables.