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.

flake.lock

@@ -87,13 +87,13 @@
         "type": "github"
       }
     },
-    "nur": {
+    "nurpkgs": {
       "locked": {
-        "lastModified": 1654123271,
-        "narHash": "sha256-xM85/VFYu8I8jZiZ7U0CmZO/98sHO7+f7PIMxQVZXCM=",
+        "lastModified": 1659413279,
+        "narHash": "sha256-7tCR//2NnB1Xw2AqK0RTYJH9YcAEKHmhiSAYsBbQp8s=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "4c83235ccca7cfcf34fee9f49023f21c0e9db128",
+        "rev": "9bedf12848954098f5298215b3a06b5eb2983058",
         "type": "github"
       },
       "original": {
@@ -108,7 +108,7 @@
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs_2",
         "nixunstable": "nixunstable",
-        "nur": "nur"
+        "nurpkgs": "nurpkgs"
       }
     }
   },

flake.nix

@@ -12,15 +12,15 @@
 			url = "github:nix-community/home-manager/release-22.05";
 			inputs.nixpkgs.follows = "nixpkgs";
 		};
-		nur.url = "github:nix-community/NUR";
+		nurpkgs.url = "github:nix-community/NUR";
 	};
 
-	outputs = {nixpkgs, nixunstable, agenix, home-manager, nur, self}@inputs:
+	outputs = {nixpkgs, nixunstable, agenix, home-manager, nurpkgs, self}@inputs:
 	let
 		local_overlay = import ./overlays;
 
 		mods = hostname: [
-			{ nixpkgs.overlays = [ nur.overlay local_overlay ]; }
+			{ nixpkgs.overlays = [ nurpkgs.overlay local_overlay ]; }
 			agenix.nixosModule
 			./modules
 			./profiles/base
@@ -28,8 +28,6 @@
 			home-manager.nixosModules.home-manager {
 				home-manager.useGlobalPkgs = true;
 				home-manager.useUserPackages = true;
-				home-manager.users.greg = import ./home/home.nix  "greg";
-				home-manager.users.root = import ./home/home.nix  "root";
 				home-manager.extraSpecialArgs = {
 					inherit nixunstable;
 				};
@@ -54,5 +52,11 @@
 		};
 
 		defaultPackage."x86_64-linux" = inputs.self.nixosConfigurations.iso.config.system.build.isoImage;
+
+		homeConfigurations = (
+			import ./home {
+				inherit nixpkgs nixunstable agenix home-manager nurpkgs;
+			}
+		);
 	};
 }

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;
 

hosts/jude/boot.nix

@@ -4,6 +4,12 @@
 	# Use the systemd-boot EFI boot loader.
 	#boot.loader.systemd-boot.enable = true;
 	boot.loader.grub.device = "/dev/nvme0n1";
+	boot.loader.grub.useOSProber = true;
+	boot.loader.grub.extraEntries = ''
+		menuentry "Windows" {
+		  chainloader (hd0,2)+1
+		}
+	'';
 	boot.loader.efi.canTouchEfiVariables = true;
 	networking.interfaces.enp4s0.useDHCP = true;
 }

overlays/default.nix

@@ -8,4 +8,8 @@ self: super:
 	xonsh = super.xonsh.overridePythonAttrs (old: rec{
 		propagatedBuildInputs = old.propagatedBuildInputs ++ [ self.xonsh-direnv ];
 	});
+
+	hms = super.callPackage ./hms.nix {
+		pkgs = self.pkgs;
+	};
 }

overlays/hms.nix

@@ -0,0 +1,20 @@
+{ pkgs, ... }:
+
+pkgs.writeShellScriptBin "hms" ''
+set -eo pipefail
+# Build different targets with GUI or not
+if [ -z "$DISPLAY" ]; then
+	target="nogui"
+else
+	target="gui"
+fi
+
+# Build and switch
+echo "Building $(uname -m)-$target"
+dest=$(mktemp -d)
+pushd "$dest" > /dev/null
+nix build --impure /etc/nixos#homeConfigurations.$(uname -m)-$target.activationPackage
+./result/activate
+popd > /dev/null
+rm -r "$dest"
+''

profiles/base/default.nix

@@ -27,6 +27,13 @@
 		];
 	};
 
+	users.users.test = {
+		isNormalUser = true;
+		createHome = true;
+		extraGroups = [ ];
+		shell = pkgs.xonsh;
+	};
+
 	i18n.defaultLocale = "en_US.UTF-8";
 
 	console = {

profiles/base/programs.nix

@@ -15,6 +15,7 @@ in {
 		git
 		gnupatch
 		findutils
+		hms # My own home manager switcher
 		home-manager
 		htop
 		myPython