WIP: Build image from scratch / without NixOS.

An experiment to see if we can minimize the PatOS project even further,
and not have to adapt NixOS packages and config for our needs.

flake.nix

@@ -2,90 +2,51 @@
   description = "PatOS is a minimal, immutable Linux distribution specialized for the Patagia Platform.";
 
   inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
   };
 
   outputs =
-    { self, nixpkgs }:
-    let
-      releaseVersion = "0.0.1";
-      system = "x86_64-linux";
-      updateUrl = "https://images.dl.patagia.dev/patos/";
-      pkgs = import nixpkgs { inherit system; };
-    in
     {
-      nixosModules.devel.imports = [
-        ./modules/profiles/devel.nix
-      ];
+      self,
+      flake-utils,
+      nixpkgs,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        packages = {
+          default = self.packages.${system}.image;
+          image = pkgs.writeShellScriptBin "image" ''
+            echo "make image here..."
+          '';
 
-      nixosModules.server.imports = [
-        ./modules/profiles/server.nix
-      ];
+          kernel = pkgs.callPackage ./kernel { };
+          systemd = pkgs.callPackage ./systemd { };
+        };
 
-      nixosModules.image.imports = [
-        ./modules
-        ./modules/profiles/base.nix
-        ./modules/image
-      ];
+        checks = {
+          simple-test = pkgs.runCommand "simple-test" { } ''
+            ${self.packages.${system}.default}/bin/my-program
+            touch $out
+          '';
+        };
 
-      packages.${system} = {
-        devel =
-          (nixpkgs.lib.nixosSystem {
-            modules = [
-              (
-                { ... }:
-                {
-                  nixpkgs.hostPlatform = system;
-                  system.stateVersion = "25.05";
-                }
-              )
-              {
-                system.image.updates.url = "${updateUrl}";
-                system.image.id = "patos";
-                system.image.version = releaseVersion;
-                image.compress = false;
-              }
-              self.nixosModules.image
-              self.nixosModules.devel
-            ];
-          }).config.system.build.updatePackage;
+        formatter = pkgs.nixpkgs-fmt;
 
-        patos =
-          (nixpkgs.lib.nixosSystem {
-            modules = [
-              (
-                { ... }:
-                {
-                  nixpkgs.hostPlatform = system;
-                  system.stateVersion = "25.05";
-                }
-              )
-              {
-                system.image.updates.url = "${updateUrl}";
-                system.image.id = "patos";
-                system.image.version = releaseVersion;
-              }
-              self.nixosModules.image
-              self.nixosModules.server
-            ];
-          }).config.system.build.updatePackage;
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            erofs-utils
+            just
+            nixd
+            nixfmt-rfc-style
+            squashfs-tools-ng
+          ];
+        };
 
-        qemu-uefi-tpm = pkgs.callPackage ./utils/qemu-uefi-tpm.nix { inherit pkgs; };
-      };
-
-      checks.${system} = {
-        podman = import ./tests/podman.nix { inherit pkgs self; };
-        system-update = import ./tests/system-update.nix { inherit pkgs self; };
-      };
-
-      devShells.${system}.default = pkgs.mkShell {
-        buildInputs = with pkgs; [
-          erofs-utils
-          just
-          self.packages.${system}.qemu-uefi-tpm
-          squashfs-tools-ng
-        ];
-      };
-
-    };
+      }
+    );
 }