This is a Heroku buildpack of ARJ compression. This buildpack will install ARJ binary (from ubuntu package) to $PATH
Example usage:
$ heroku create --stack cedar --buildpack https://github.com/alanho/heroku-buildpack-arj.git
# or if your app is already created:
$ heroku config:add BUILDPACK_URL=https://github.com/alanho/heroku-buildpack-arj.git
$ git push heroku master