This is a library for Git written in Node.js. It's as close a port of grit http://github.com/mojombo/grit.
http://github.com/christkv/node-git. You can either clone the repository or download a tarball of the latest release.
Once you have the source you can test the driver by running
$ make test
PS > node.exe .\node_modules\nodeunit\bin\nodeunit .\test