Terranix is mostly terraform written in nix.
You are new to terraform, but you are fit in nix? This is the place for you to start.
You know nix and terraform and want to see how to terranix works? This the place to start.
Syntax differences between terranix and HCL
The NixOS module system the real power behind terranix.
Some terranix functions which are useful including examples.
List of Documentation and Code related to terranix