How to pass parameters to Nix script from Terraform?

[smulikHakipod]

Hi!
Let's say I want to pass PublicIP and other parameters from Terraform to Nix file, how should I do that?
I tried using

extra_eval_args = ["--argstr", "some_arg", aws_instance.node.public_ip]
or
extra_build_args = ["--argstr", "some_arg", aws_instance.node.public_ip]

but none of those are shown in the Nix file as arguments.

What other approach should I use?

Thanks

[adrian-gierakowski]

Let's say I want to pass PublicIP and other parameters from Terraform to Nix file, how should I do that?

which nix file? Do you mean one of these scripts:

• https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/deploy_nixos/nixos-instantiate.sh
• https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/deploy_nixos/nixos-deploy.sh

I tried using

extra_eval_args = ["--argstr", "some_arg", aws_instance.node.public_ip]
or

How are you setting these? Would you mind sharing repo with a minimal repro? Thanks!

[smulikHakipod]

Thanks for help @adrian-gierakowski !
In my case I would like to pass a parameter from lets say
from

terraform-nixos/examples/hermetic_config/default.tf

Line 20 in 646cacb

module "deploy_nixos" {

to here

terraform-nixos/examples/hermetic_config/configuration.nix

Line 35 in 646cacb

ec2.hvm = true;

I hope it makes things more clear.
I can make a minimal repo tomorrow. Thanks again!

[smulikHakipod]

@adrian-gierakowski I created a mini repo:
I want to pass argument from TF:

https://github.com/smulikHakipod/mini-nix-terraform-/blob/2cdc1645fabb50efbe579b6195dd25dbac00b421/default.tf#L27

To nix config:

https://github.com/smulikHakipod/mini-nix-terraform-/blob/2cdc1645fabb50efbe579b6195dd25dbac00b421/configuration.nix#L38

What is the best way to achieve this?

Thanks!!