PatOS is born!

flake.nix

@@ -0,0 +1,70 @@
+{
+  description = "PatOS is a minimal, immutable Linux distribution specialized for the Patagia Platform.";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: {
+    lib = {
+      # Prepare a ready-to-boot disk image.
+      mkInstallImage = nixos:
+        let
+          config = nixos.config;
+          pkgs = nixpkgs.legacyPackages.x86_64-linux.pkgs;
+        in
+        nixos.pkgs.runCommand "update-${config.system.image.version}"
+          {
+            nativeBuildInputs = with pkgs; [ qemu ];
+          } ''
+          mkdir -p $out
+          qemu-img convert -f raw -O qcow2 -C ${config.system.build.image}/${config.boot.uki.name}_${config.system.image.version}.raw $out/disk.qcow2
+        '';
+    };
+
+    devShells.x86_64-linux.default =
+      let
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      in
+      pkgs.mkShell {
+        packages = [
+          self.packages.x86_64-linux.qemu-efi
+        ];
+      };
+
+    packages.x86_64-linux = {
+      default = self.packages.x86_64-linux.patos_image;
+
+      patos_image = self.lib.mkInstallImage self.nixosConfigurations.patos;
+
+      # A helper script to run the disk images above.
+      qemu-efi =
+        let
+          pkgs = nixpkgs.legacyPackages.x86_64-linux;
+        in
+        pkgs.writeShellApplication {
+          name = "qemu-efi";
+
+          runtimeInputs = [ pkgs.qemu_kvm ];
+
+          text = ''
+            qemu-system-x86_64 \
+              -smp 2 -m 2048 -machine q35,accel=kvm \
+              -bios ${pkgs.OVMF.fd}/FV/OVMF.fd \
+              -snapshot \
+              -display none \
+              -serial stdio "$@"
+          '';
+        };
+    };
+
+    nixosConfigurations = {
+      patos = nixpkgs.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          ./base.nix
+        ];
+      };
+    };
+  };
+}