Convert home-manager to flakes

Instead of calling the home manager directly in the user's list, we add
a command for the user to invoke "hms" and have their environment setup
in the way that Greg likes.

home/default.nix

@@ -0,0 +1,35 @@
+{ nixpkgs, nurpkgs, home-manager, username ? builtins.getEnv "USER", ... }:
+
+let
+	homeDirectory = if username == "root" then "/root" else "/home/${username}";
+	configDir = "${homeDirectory}/.config";
+
+	pkgs = import nixpkgs {
+		config.allowUnfree = true;
+		config.xdg.configHome = configDir;
+		overlays = [
+			nurpkgs.overlay
+			(import ../overlays)
+		];
+	};
+
+	nur = import nurpkgs {
+		inherit pkgs;
+		nur = pkgs;
+	};
+
+	mkhome = system: gui:
+		home-manager.lib.homeManagerConfiguration rec {
+			inherit pkgs system username homeDirectory;
+			stateVersion = "22.05";
+			configuration = import ./home.nix username {
+				inherit nur pkgs gui;
+				inherit (pkgs) config lib stdenv;
+			};
+		};
+in {
+	"aarch64-gui" = mkhome "aarch64-linux" true;
+	"aarch64-nogui" = mkhome "aarch64-linux" false;
+	"x86_64-gui" = mkhome "x86_64-linux" true;
+	"x86_64-nogui" = mkhome "x86_64-linux" false;
+}

home/home.nix

@@ -1,7 +1,7 @@
-name: { pkgs, lib, nixosConfig, ...}:
+name: { pkgs, lib, gui, ...}:
 
 let
-	guiImports = if nixosConfig.greg.gnome.enable then
+	guiImports = if gui then
 		[ ./gui ] else [];
 
 in {
@@ -17,7 +17,8 @@ in {
 	] ++ guiImports;
 
 
-	home.username = name;
-	home.homeDirectory = if name == "root" then "/root" else "/home/${name}";
-	home.stateVersion = "21.11";
+	home.stateVersion = "22.05";
+	home.packages = [
+		pkgs.hms
+	];
 }

home/xonsh.nix

@@ -1,8 +1,6 @@
-{ pkgs, config, nixosConfig, lib, ... }:
+{ pkgs, config, lib, ... }:
 
-let
-	enable = nixosConfig.greg.gnome.enable;
-in {
+{
 	programs.xonsh = {
 		enable = true;