docs: document flake-parts module

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Matt Sturgeon 2024-04-05 09:19:48 +01:00
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@ -30,6 +30,7 @@ nix-flakes/prerequisites.md
nix-flakes/standalone.md
nix-flakes/nixos.md
nix-flakes/nix-darwin.md
nix-flakes/flake-parts.md
```

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# flake-parts module {#sec-flakes-flake-parts-module}
When using [flake-parts](https://flake.parts)
you may wish to import home-manager's flake module,
`flakeModules.home-manager`.
``` nix
{
description = "flake-parts configuration";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
home-manager.url = "github:nix-community/home-manager";
home-manager.inputs.nixpkgs.follows = "nixpkgs";
flake-parts.url = "github:hercules-ci/flake-parts";
};
outputs = inputs@{ flake-parts, ... }:
flake-parts.lib.mkFlake { inherit inputs; } {
imports = [
# Import home-manager's flake module
inputs.home-manager.flakeModules.home-manager
];
flake = {
# Define `homeModules`, `homeConfigurations`,
# `nixosConfigurations`, etc here
};
# See flake.parts for more features, such as `perSystem`
};
}
```
The flake module defines the `flake.homeModules` and `flake.homeConfigurations`
options, allowing them to be properly merged if they are defined in multiple
modules.
If you are only defining `homeModules` and/or `homeConfigurations` once in a
single module, flake-parts should work fine without importing
`flakeModules.home-manager`.