A simple lib for bundling gems into jars. This obviously is intended for use with JRuby. Install the gem and create a rake task and a configuration file in your project:
GemBundler.instance.configure do |g| g.gem "foo_gem" g.gem "path/to/a/gemfile/some_gem-0.3.2.gem" #version requirement will not work here g.gem "activerecord", ">= 2.3" g.setup "tmp/gems", "foo/lib" end
require 'gem_bundler' require 'path/to/your/config/gems.rb' desc "Bundle gems into a JAR file" task :bundle_gems do GemBundler.instance.bundle end
This will install the configured gems into “tmp/gems” (this dir will be deleted, so be cautious), move any JAR files inside the gems to “foo/lib” and package the gems into “foo/lib/gems.jar”.
In your JRuby application you should put “foo/lib” onto your $LOAD_PATH (because the moved jars from the gems will probably be required) and require gems.jar.
See blog.nicksieger.com/articles/2009/01/10/jruby-1-1-6-gems-in-a-jar for details.
I use this mechanism to bundle gems to go with applications packaged using rawr.