https://github.com/vic/fp-nm-ws

A flake-parts module to access per-system module arguments inside nixos-modules.
https://github.com/vic/fp-nm-ws

flake-parts flakes nix nixos-module

Last synced: 10 months ago
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A flake-parts module to access per-system module arguments inside nixos-modules.

• Host: GitHub
• URL: https://github.com/vic/fp-nm-ws
• Owner: vic
• License: apache-2.0
• Created: 2023-11-08T22:39:48.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-11-08T22:43:32.000Z (over 2 years ago)
• Last Synced: 2025-05-13T17:43:28.608Z (about 1 year ago)
• Topics: flake-parts, flakes, nix, nixos-module
• Language: Nix
• Homepage:
• Size: 5.86 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# fp-nm-ws: FlakeParts NixosModule WithSystem'

This flake provides a [flake-parts](https://flake.parts) module

that allows nixos-modules to access [perSystem](https://flake.parts/module-arguments#withsystem) [module parameters](https://flake.parts/module-arguments#persystem-module-parameters) without having to rely on global variables.

Mixing the provided `nixosModules.default` module, will provide you

with `withSystem'`, `self'`, and `inputs'` to your other nixos modules.

### Example Usage

```nix

# flake.nix

{

  inputs.flake-parts.url = "github:hercules-ci/flake-parts";

  inputs.fp-nm-ws.url = "github:vic/fp-nm-ws";

  outputs = inputs: inputs.flake-parts.lib.mkFlake { inherit inputs; } ./your-flake-module.nix;

}

```

```nix

# your-flake-module.nix

{inputs, ...}: {

  perSystem = {system, ...}: {

    config._module.args.foo = "moo-${system}"; # suppose you have a per-system module argument named foo.

    options.bar.default = "some per-system option";

  };

  flake.nixosModules.your-nixos-module.imports = [

    inputs.fp-nm-ws.nixosModules.default # mix-in along with your nixos module.

    ./your-nixos-module.nix

  ];

}

```

```nix

# your-nixos-module.nix

{ config, lib, withSystem', inputs', ...}: {

  # an example usage is reusing the same nixpkgs instance.

  nixpkgs.pkgs = inputs'.nixpkgs.legacyPackages;

  accessFoo = withSystem' ({foo, ...}: foo); # use named parameters

  accessBar = withSystem' (sys@{config, ...}: sys.config.bar);

}

```