Hammer.rb is the hammer compilation gem. Check out the "v2" branch for the latest.
@build = Hammer::Build.new(
:input_directory => @input_directory,
:output_directory => Dir.mktmpdir(),
:cache_directory => Dir.mktmpdir()
)
@build.compile()
$ git clone git@github.com:RiotHQ/hammer-gem.git
$ cd hammer-gem
$ bundle install
$ bundle exec rake use