gemjam

Gemjam

Create java jar, for jRuby, from gems or a bundler Gemfile

Installation

Add this line to your application's Gemfile:

gem 'gemjam'

And then execute:

$ bundle

Or install it yourself as:

$ gem install gemjam

Dependencies

On fedora, for the java jar command:

yum install java-devel-openjdk

Usage

Package up a specific version of one gem, and latest version of another

gemjam -g sinatra,1.3.5 -g hurp

Package up the dependencies from the Gemfile in the current directory

gemjam -b

Combo, but Gemfile from another directory

gemjam -b ../foo/Gemfile -g sinatra,1.3.5 -g hurp

You'll get an output like

$ gemjam -g sinatra
{:jruby=>"jruby", :gems=>["sinatra"]}
Successfully installed rack-1.5.2
Successfully installed tilt-1.4.1
Successfully installed rack-protection-1.5.0
Successfully installed sinatra-1.4.3
4 gems installed
Created d20130723-10726-1sgce23.jar

To grep only the jar name

$ gemjam -g sinatra | grep -e ^Created.*jar$ | cut -d " " -f 2
d20130723-10726-1sgce23.jar

To specify an alternate jruby executable

$ gemjam -j "java -jar ~/Downloads/jruby-complete-1.7.4.jar" -g sinatra
{:jruby=>"java -jar ~/Downloads/jruby-complete-1.7.4.jar", :gems=>["sinatra"]}
Successfully installed rack-1.5.2
Successfully installed tilt-1.4.1
Successfully installed rack-protection-1.5.0
Successfully installed sinatra-1.4.3
4 gems installed
Created d20130723-24156-1omlum7.jar

How this is used practically aftwards

$ gemjam -j "java -jar ~/Downloads/jruby-complete-1.7.4.jar" -g rye
{:jruby=>"java -jar ~/Downloads/jruby-complete-1.7.4.jar", :gems=>["rye"]}
Successfully installed highline-1.6.19
Successfully installed annoy-0.5.6
Successfully installed storable-0.8.9
Successfully installed drydock-0.6.9
Successfully installed sysinfo-0.8.0
Successfully installed net-ssh-2.6.8
Successfully installed net-scp-1.1.2
Successfully installed docile-1.0.3
Successfully installed rye-0.9.8
9 gems installed
Created d20130723-835-1i0moio.jar
$ java -jar ~/Downloads/jruby-complete-1.7.4.jar -r ./d20130723-835-1i0moio.jar -r rye -e 'puts Rye::Box.new("mybox.example.com").uptime'
 23:36:22 up 133 days,  9:23,  0 users,  load average: 0.06, 0.05, 0.05

Contributing

• Fork it
• Create your feature branch (git checkout -b my-new-feature)
• Commit your changes (git commit -am 'Added some feature')
• Push to the branch (git push origin my-new-feature)
• Create new Pull Request