forked from extern/flakelight
f2c32f5a42
optFunctionTo results in a function which needs to be called when using the option value. This is needed when the argument is not known when building types (such as with pkgs). When the args are known (for example, moduleArgs), this leads to more complex code than just calling the function and resulting in the target type. optCallWith does the latter.
48 lines
1.6 KiB
Nix
48 lines
1.6 KiB
Nix
# flakelight -- Framework for simplifying flake setup
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# Copyright (C) 2023 Archit Gupta <archit@accelbread.com>
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# SPDX-License-Identifier: MIT
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{ config, lib, inputs, flakelight, moduleArgs, ... }:
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let
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inherit (builtins) mapAttrs;
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inherit (lib) foldl mapAttrsToList mkIf mkOption recursiveUpdate;
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inherit (lib.types) attrs lazyAttrsOf;
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inherit (flakelight) selectAttr;
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inherit (flakelight.types) optCallWith;
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# Avoid checking if toplevel is a derivation as it causes the nixos modules
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# to be evaluated.
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isNixos = x: x ? config.system.build.toplevel;
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mkNixos = hostname: cfg: inputs.nixpkgs.lib.nixosSystem (cfg // {
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specialArgs = {
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inherit inputs hostname;
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inputs' = mapAttrs (_: selectAttr cfg.system) inputs;
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} // cfg.specialArgs or { };
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modules = [ config.propagationModule ] ++ cfg.modules or [ ];
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});
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configs = mapAttrs
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(hostname: cfg: if isNixos cfg then cfg else mkNixos hostname cfg)
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config.nixosConfigurations;
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in
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{
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options.nixosConfigurations = mkOption {
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type = lazyAttrsOf (optCallWith moduleArgs attrs);
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default = { };
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};
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config.outputs = mkIf (config.nixosConfigurations != { }) {
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nixosConfigurations = configs;
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checks = foldl recursiveUpdate { } (mapAttrsToList
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(n: v: {
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# Wrapping the drv is needed as computing its name is expensive
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# If not wrapped, it slows down `nix flake show` significantly
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${v.config.nixpkgs.system}."nixos-${n}" = v.pkgs.runCommand
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"check-nixos-${n}"
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{ } "echo ${v.config.system.build.toplevel} > $out";
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})
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configs);
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};
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}
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