Nixpkgs: Package terraform-provider-libvirt-0.6.2 is not supported on x86_64-darwin

[ayr-ton]

Describe the bug
terragrunt 0.23.40 is not installable on Darwin (MacOS Catalina).

To Reproduce
Steps to reproduce the behavior:

1. From Darwin, run nix-env -iA nixpkgs.terragrunt --show-trace

Expected behavior
To install the package as expected

Current behavior

error: while evaluating the attribute 'postInstall' of the derivation 'terragrunt-0.23.40' at /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:192:11:
while evaluating the attribute 'buildCommand' of the derivation 'terraform-0.12.29' at /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/applications/networking/cluster/terraform/default.nix:87:32:
while evaluating the attribute 'passAsFile' of the derivation 'tf-plugin-env' at /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/build-support/trivial-builders.nix:7:7:
while evaluating the attribute 'handled' at /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/stdenv/generic/check-meta.nix:256:7:
while evaluating 'handleEvalIssue' at /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/stdenv/generic/check-meta.nix:152:38, called from /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/stdenv/generic/check-meta.nix:257:14:
Package ‘terraform-provider-libvirt-0.6.2’ in /nix/store/8d4ar6f3f37jdhvdz7n416c5ppx909ls-nixpkgs-21.03pre243854.2a14d21224f/nixpkgs/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix:47 is not supported on ‘x86_64-darwin’, refusing to evaluate.

a) For `nixos-rebuild` you can set
  { nixpkgs.config.allowUnsupportedSystem = true; }
in configuration.nix to override this.

b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
  { allowUnsupportedSystem = true; }
to ~/.config/nixpkgs/config.nix.

Allowing UnsupportedSystem didn't fix the issue.

Notify maintainers
@marsam @r-ryantm @zowoq @c00w @06kellyjac @shlevy

Metadata

• system: "x86_64-darwin"
• host os: Darwin 19.6.0, macOS 10.15.6
• multi-user?: no
• sandbox: no
• version: nix-env (Nix) 2.3.7
• channels(user): "nixpkgs-21.03pre243854.2a14d21224f"
• nixpkgs: /Users/user/.nix-defexpr/channels/nixpkgs

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:
- terragrunt 

[06kellyjac]

So it looks like terraform-provider-libvirt-0.6.2 is the issue here. It's pulled in by terraform.full on this line:

https://github.com/NixOS/nixpkgs/blob/d3b47f15561ce11f589fdea3ddb8e7839ef825f8/pkgs/applications/networking/cluster/terragrunt/default.nix#L26

I don't like the terraform.full usage personally because I'm fine with terraform grabbing providers on the fly.

You can try put this in ~/.config/nixpkgs/overlays.nix:

[
  (self: super: {
    terragrunt = super.terragrunt.overrideAttrs (oldAttrs: {
      postInstall = ''
        wrapProgram $out/bin/terragrunt \
          --set TERRAGRUNT_TFPATH ${super.stdenv.lib.getBin super.terraform}/bin/terraform
      '';
    });
  })
]

If you did want to use the terraform providers in nixpkgs I guess you'll want to override terraform.full instead.

[ayr-ton]

@06kellyjac Thank you very much!
This works for me and does not affect my daily usage.

[06kellyjac]

IDK what everyone else's opinion is on whether terraform.full or terraform should be default, but we should certainly add an option to make this a bit cleaner.

Thoughts on a separate terragrunt and terragrunt.full? Or just an option like polybar etc
https://github.com/NixOS/nixpkgs/blob/c8479286c77f66d829894114c4481de75d25d8c8/pkgs/applications/misc/polybar/default.nix#L14

There is the concern of changing the behavior for existing users. IDK how nixpkgs/nixos approaches breaking changes.