added stuff

nyx/lib/builders.nix

@@ -0,0 +1,85 @@
+{
+  lib,
+  inputs,
+  ...
+}: let
+  # inherit self from inputs
+  inherit (inputs) self;
+
+  # just an alias to nixpkgs.lib.nixosSystem, lets me avoid adding
+  # nixpkgs to the scope in the file it is used in
+  mkSystem = lib.nixosSystem;
+
+  # mkNixoSystem is a convenient wrapper that wraps lib.nixosSystem (aliased to mkSystem here) to
+  # provide us a convenient boostrapper for new systems with inputs' and self' (alongside other specialArgs)
+  # already passed to the nixosSystem attribute set without us having to re-define them everytime, instead
+  # defining specialArgs by default and lazily merging any additional arguments defined by the host in the builder
+  mkNixosSystem = {
+    modules,
+    system,
+    hostname,
+    withSystem,
+    ...
+  } @ args:
+    withSystem system ({
+      inputs',
+      self',
+      ...
+    }:
+      mkSystem {
+        inherit system;
+        specialArgs = {inherit lib inputs self inputs' self';} // args.specialArgs or {};
+        modules =
+          [
+            {
+              config = {
+                networking.hostName = args.hostname;
+                nixpkgs.hostPlatform = lib.mkDefault args.system;
+              };
+            }
+          ]
+          ++ args.modules or [];
+      });
+
+  # mkIso is should be a set that extends mkSystem with necessary modules
+  # to create an Iso image
+  # we do not use mkNixosSystem because it overcomplicates things, an ISO does not require what we get in return for those complications
+  mkNixosIso = {
+    modules,
+    system,
+    hostname,
+    ...
+  } @ args:
+    mkSystem {
+      inherit system;
+      specialArgs = {inherit inputs lib self;} // args.specialArgs or {};
+      modules =
+        [
+          # get an installer profile from nixpkgs to base the Isos off of
+          "${inputs.nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
+          "${inputs.nixpkgs}/nixos/modules/installer/cd-dvd/channel.nix"
+
+          {config.networking.hostName = args.hostname;}
+        ]
+        ++ args.modules or [];
+    };
+
+  mkSdImage = {
+    modules,
+    system,
+    ...
+  } @ args:
+    mkSystem {
+      inherit system;
+      specialArgs = {inherit inputs lib self;} // args.specialArgs or {};
+      modules =
+        [
+          # get an installer profile from nixpkgs to base the Isos off of
+          "${inputs.nixpkgs}/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix"
+          inputs.nixos-hardware.nixosModules.raspberry-pi-4
+        ]
+        ++ args.modules or [];
+    };
+in {
+  inherit mkSystem mkNixosSystem mkNixosIso mkSdImage;
+}