This project is archived, but the idea of Terrastack lives on in the Terraform CDK.
Terrastack enables you to keep using Terraform as engine, while defining your resources in actual programming languages such as Typescript, Python, Java or C# - with more to come (perhaps Ruby?).
This is made possible by the Cloud Development Kit (CDK) and jsii for generating the polyglot libraries. While the major use-case for the CDK is generating Cloudformation configuration as YAML, it's capable of generating pretty much any configuration.
Applying it Terraform was inspired by the release of cdk8s, which also paved the way for rapid progress towards a working Terraform version.
Terrastack makes use of the following things:
With that, we're able to generate packages for any given Terraform provider in the following languages:
In the current state, this is mostly a prototype. It demonstrates that it's possible and quite useful to leverage the CDK. Interfaces and Apis will certainly change and there are still some problems to solve.
However, it's possible to generate full bindings for a given Terraform provider (tested with AWS and Google Cloud so far).