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feat: Pass nix-config as self to avoid infinite recursion

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This change makes it possible to use this nix-config in all the
different ways imaginable (containers, bare metal, tests, and as a
separate flake input) *without* running into infinite recursion
issues with self.

It does this by using a trick similar to JavaScript in which
`var self = this;`, thus enabling the usage of "this" (or self, in
Nix's case) where it wouldn't otherwise be possible.

Note that this *only* works if the input for this repository is named
nix-config. This makes it impractical to combine with multiple
configurations that employ the same strategy.
This commit is contained in:
Donovan Glover 2024-04-05 10:09:51 -04:00
parent b368817c52
commit 59f557a3e5
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GPG Key ID: EA7408A77AE1BE65
5 changed files with 13 additions and 8 deletions
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2
flake.nix
View File

@ -40,7 +40,7 @@
nixosConfigurations = { nixosConfigurations = {
nixos = nixosSystem { nixos = nixosSystem {
system = "x86_64-linux"; system = "x86_64-linux";
specialArgs = attrs; specialArgs = attrs // { nix-config = self; };
modules = [ modules = [
./hardware/laptop.nix ./hardware/laptop.nix
{ {

5
modules/containers.nix
View File

@ -1,4 +1,4 @@
{ config, stylix, home-manager, sakaya, ... }: { config, nix-config, sakaya, ... }:
let let
inherit (config.modules.system) username; inherit (config.modules.system) username;
@ -39,8 +39,7 @@ let
]; ];
specialArgs = { specialArgs = {
inherit home-manager; inherit nix-config;
inherit stylix;
}; };
}; };
in in

6
modules/desktop.nix
View File

@ -1,4 +1,4 @@
{ home-manager, stylix, pkgs, config, lib, ... }: { nix-config, pkgs, config, lib, ... }:
let let
inherit (lib) mkEnableOption mkIf mkMerge; inherit (lib) mkEnableOption mkIf mkMerge;
@ -14,8 +14,8 @@ let
in in
{ {
imports = attrValues { imports = attrValues {
inherit (home-manager.nixosModules) home-manager; inherit (nix-config.inputs.home-manager.nixosModules) home-manager;
inherit (stylix.nixosModules) stylix; inherit (nix-config.inputs.stylix.nixosModules) stylix;
}; };
options.modules.desktop = { options.modules.desktop = {

7
modules/system.nix
View File

@ -1,14 +1,19 @@
{ pkgs, lib, config, ... }: { nix-config, pkgs, lib, config, ... }:
let let
inherit (lib) mkOption; inherit (lib) mkOption;
inherit (lib.types) str listOf; inherit (lib.types) str listOf;
inherit (pkgs.nixVersions) nix_2_19; inherit (pkgs.nixVersions) nix_2_19;
inherit (cfg) username; inherit (cfg) username;
inherit (builtins) attrValues;
cfg = config.modules.system; cfg = config.modules.system;
in in
{ {
imports = attrValues {
inherit (nix-config.inputs.home-manager.nixosModules) home-manager;
};
options.modules.system = { options.modules.system = {
username = mkOption { username = mkOption {
type = str; type = str;

1
tests/lib.nix
View File

@ -8,6 +8,7 @@ in
defaults.documentation.enable = lib.mkDefault false; defaults.documentation.enable = lib.mkDefault false;
node.specialArgs = { node.specialArgs = {
inherit self; inherit self;
nix-config = self;
}; };
imports = [ test ]; imports = [ test ];
}).config.result }).config.result