apparentlymart / terraform-provider-hcl

Terraform provider that exposes HCL parsing and evaluation functionality

HCL provider for Terraform

This provider allows a module written for Terraform, or any other Terraform-provider-compatible software, to interact with parsing and evaluation functionality provided by the HCL configuration language toolkit.

HCL is the toolkit used as the foundations of the Terraform language, but it's important to realize that this provider is for HCL itself, and not for the Terraform language. You can use this provider to define and evaluate your own small HCL-based languages, but there's nothing here for evaluating the Terraform language specifically, since that's Terraform's own responsibility.

This provider contains only functions. Terraform v1.8 introduced the possibility for providers to contribute functions into the language, and so this provider effectively requires Terraform v1.8.0 or later.

Usage

To use the functions contributed by this provider, you'll first need to import the provider into your module as a dependency:

terraform {
  required_providers {
    hcl = {
      source = "apparentlymart/hcl"
    }
  }
}

The example above uses the local name hcl to refer to the provider, and so all of the functions would be called using the prefix provider::hcl::. For example, the evalexpr function would be called as provider::hcl::evalexpr.