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Enable simpler config of nixos/home configurations

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Instead of having to call the configuration generation functions, the
params can just be set, and the functions will be called automatically
with additional useful settings automatically set.
This commit is contained in:
Archit Gupta
2024-01-14 01:29:16 -08:00
parent ec343ae967
commit cc2f42fbdf
4 changed files with 134 additions and 70 deletions
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56
builtinModules/nixosConfigurations.nix
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@ -2,40 +2,60 @@
# Copyright (C) 2023 Archit Gupta <archit@accelbread.com>
# SPDX-License-Identifier: MIT
{ config, lib, flakelight, moduleArgs, ... }:
{ config, lib, inputs, flakelight, moduleArgs, ... }:
let
inherit (builtins) isAttrs mapAttrs;
inherit (lib) foldl mapAttrsToList mergeOneOption mkIf mkOption mkOptionType
recursiveUpdate;
inherit (lib.types) lazyAttrsOf;
inherit (builtins) concatLists mapAttrs;
inherit (lib) foldl last mapAttrsToList mkIf mkOption recursiveUpdate
zipAttrsWith;
inherit (lib.types) attrs lazyAttrsOf;
inherit (flakelight.types) optFunctionTo;
nixosConfiguration = mkOptionType {
name = "nixosConfiguration";
description = "nixosConfiguration";
descriptionClass = "noun";
check = x: isAttrs x
&& x ? config.nixpkgs.system
&& x ? config.system.build.toplevel;
merge = mergeOneOption;
};
# Avoid checking if toplevel is a derivation as it causes the nixos modules
# to be evaluated.
isNixos = x: x ? config.system.build.toplevel;
configs = mapAttrs (_: f: f moduleArgs) config.nixosConfigurations;
mergeCfg = zipAttrsWith (n: vs:
if n == "specialArgs" then
foldl (a: b: a // b) { } vs
else if n == "modules" then
concatLists vs
else last vs);
mkSystem = hostname: cfg:
let
inherit (cfg) system;
in
inputs.nixpkgs.lib.nixosSystem (mergeCfg [
{
specialArgs = {
inherit inputs hostname;
inputs' = mapAttrs (_: mapAttrs (_: v: v.${system} or { })) inputs;
};
modules = [ config.propagationModule ];
}
cfg
]);
systems = mapAttrs
(hostname: f:
let val = f moduleArgs; in
if isNixos val then val else mkSystem hostname val)
config.nixosConfigurations;
in
{
options.nixosConfigurations = mkOption {
type = lazyAttrsOf (optFunctionTo nixosConfiguration);
type = lazyAttrsOf (optFunctionTo attrs);
default = { };
};
config.outputs = mkIf (config.nixosConfigurations != { }) {
nixosConfigurations = configs;
nixosConfigurations = systems;
checks = foldl recursiveUpdate { } (mapAttrsToList
(n: v: {
${v.config.nixpkgs.system}."nixos-${n}" = v.pkgs.runCommand
"check-nixos-${n}"
{ } "echo ${v.config.system.build.toplevel} > $out";
})
configs);
systems);
};
}