added robust iso

configuration.nix

@@ -3,6 +3,8 @@
 {
   imports = [
     ./modules/modules.nix
+    ./custom.nix
+    ./iso/branding.nix
   ];
 
   # ── Boot ────────────────────────────────────────────────────

flake.nix

@@ -27,13 +27,21 @@
 			];
 		};
 
-		nixosConfigurations.sovran-iso = nixpkgs.lib.nixosSystem {
+		nixosConfigurations.sovran-iso-desktop = nixpkgs.lib.nixosSystem {
 			system = "x86_64-linux";
 			modules = [
-				({ config, pkgs, ... }: {
-					nixpkgs.overlays = [ overlay-stable ];
-				})
-				./iso.nix
+				({ config, pkgs, ... }: { nixpkgs.overlays = [ overlay-stable ]; })
+				./iso/desktop.nix
+				nix-bitcoin.nixosModules.default
+				nixvim.nixosModules.nixvim
+			];
+		};
+
+		nixosConfigurations.sovran-iso-server = nixpkgs.lib.nixosSystem {
+			system = "x86_64-linux";
+			modules = [
+				({ config, pkgs, ... }: { nixpkgs.overlays = [ overlay-stable ]; })
+				./iso/server.nix
 				nix-bitcoin.nixosModules.default
 				nixvim.nixosModules.nixvim
 			];

iso.nix

@@ -1,22 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-  imports = [
-    # Base ISO profile
-    "${pkgs.path}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
-
-    # Your full system config + modules
-    ./configuration.nix
-  ];
-
-  # ISO tweaks
-  isoImage.isoName = "Sovran_SystemsOS.iso";
-
-  # Convenience: enable SSH in live ISO
-  services.openssh.enable = true;
-  services.openssh.settings.PermitRootLogin = "yes";
-  services.openssh.settings.PasswordAuthentication = true;
-
-  # Optional: default password for ISO login only
-  users.users.nixos.password = "nixos";
-}

iso/iso_branding.nix

@@ -0,0 +1,11 @@
+{ config, pkgs, lib, ... }:
+
+let
+  theme = pkgs.callPackage ./plymouth-theme.nix {};
+in
+{
+  boot.plymouth.enable = true;
+  boot.plymouth.theme = "sovran";
+  boot.plymouth.themePackages = [ theme ];
+  boot.kernelParams = [ "quiet" "splash" ];
+}

iso/iso_common.nix

@@ -0,0 +1,48 @@
+{ config, pkgs, lib, ... }:
+
+let
+  sovranSource = builtins.path { path = ../.; name = "sovran-systemsos"; };
+  installer = pkgs.writeShellScriptBin "sovran-install" (builtins.readFile ./installer.sh);
+in
+{
+  imports = [
+    "${pkgs.path}/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix"
+    ./branding.nix
+  ];
+
+  isoImage.isoName = "Sovran_SystemsOS.iso";
+
+  users.users.free = {
+    isNormalUser = true;
+    description = "free";
+    extraGroups = [ "wheel" "networkmanager" ];
+    initialPassword = "free";
+  };
+
+  services.displayManager.autoLogin.enable = true;
+  services.displayManager.autoLogin.user = "free";
+
+  environment.systemPackages = with pkgs; [
+    installer
+    zenity
+    util-linux
+    parted
+    dosfstools
+    e2fsprogs
+    gptfdisk
+    nixos-install-tools
+    git
+    curl
+  ];
+
+  environment.etc."sovran/flake".source = sovranSource;
+
+  environment.etc."xdg/autostart/sovran-installer.desktop".text = ''
+    [Desktop Entry]
+    Type=Application
+    Name=Sovran Guided Installer
+    Exec=${installer}/bin/sovran-install
+    Terminal=false
+    X-GNOME-Autostart-enabled=true
+  '';
+}

iso/iso_desktop.nix

@@ -0,0 +1,5 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [ ./common.nix ];
+}

iso/iso_installer.sh

@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+LOG=/tmp/sovran-install.log
+exec > >(tee -a "$LOG") 2>&1
+
+export PATH=/run/current-system/sw/bin:$PATH
+
+BYTES_4TB=$((4 * 1024 * 1024 * 1024 * 1024))
+
+human_size() {
+  numfmt --to=iec --suffix=B "$1"
+}
+
+zenity --info --width=500 --text="Sovran SystemsOS Installer\n\nWARNING:\nThis installer will ERASE ALL DATA on selected disks.\n\nPress OK to continue."
+
+mapfile -t DISKS < <(lsblk -b -dno NAME,SIZE,TYPE | awk '$3=="disk"{print $1":"$2}')
+if [ "${#DISKS[@]}" -eq 0 ]; then
+  zenity --error --text="No disks found."
+  exit 1
+fi
+
+IFS=$'\n' DISKS_SORTED=($(printf "%s\n" "${DISKS[@]}" | sort -t: -k2,2n))
+unset IFS
+
+BOOT_DISK="${DISKS_SORTED[0]%%:*}"
+BOOT_SIZE="${DISKS_SORTED[0]##*:}"
+
+DATA_DISK=""
+DATA_SIZE=""
+
+if [ "${#DISKS_SORTED[@]}" -ge 2 ]; then
+  DATA_DISK="${DISKS_SORTED[-1]%%:*}"
+  DATA_SIZE="${DISKS_SORTED[-1]##*:}"
+fi
+
+if [ -n "$DATA_DISK" ] && [ "$DATA_SIZE" -lt "$BYTES_4TB" ]; then
+  zenity --warning --width=500 --text="Second disk detected (${DATA_DISK}), but it is smaller than 4TB.\n\nIt will NOT be used."
+  DATA_DISK=""
+  DATA_SIZE=""
+fi
+
+SUMMARY="Boot disk: /dev/${BOOT_DISK} ($(human_size "$BOOT_SIZE"))"
+if [ -n "$DATA_DISK" ]; then
+  SUMMARY="${SUMMARY}\nData disk: /dev/${DATA_DISK} ($(human_size "$DATA_SIZE"))"
+else
+  SUMMARY="${SUMMARY}\nData disk: none"
+fi
+
+ROLE=$(zenity --list --radiolist --width=500 --height=250 \
+  --title="Choose Install Role" \
+  --column="" --column="Role" \
+  TRUE "Server-Desktop (default)" \
+  FALSE "Desktop" \
+  FALSE "Node (Bitcoin-only)" || true)
+
+if [ -z "$ROLE" ]; then
+  ROLE="Server-Desktop (default)"
+fi
+
+CONFIRM=$(zenity --entry --width=500 --text="WARNING: This will ERASE ALL DATA on:\n\n${SUMMARY}\n\nType ERASE to continue.")
+if [ "$CONFIRM" != "ERASE" ]; then
+  zenity --error --text="Install cancelled."
+  exit 1
+fi
+
+BOOT_PATH="/dev/${BOOT_DISK}"
+PART_SUFFIX=""
+if [[ "$BOOT_DISK" =~ ^(nvme|mmcblk) ]]; then
+  PART_SUFFIX="p"
+fi
+
+parted --script "$BOOT_PATH" mklabel gpt
+parted --script "$BOOT_PATH" mkpart ESP fat32 1MiB 512MiB
+parted --script "$BOOT_PATH" set 1 esp on
+parted --script "$BOOT_PATH" mkpart primary ext4 512MiB 100%
+
+partprobe "$BOOT_PATH"
+udevadm settle
+
+mkfs.fat -F 32 -n boot "${BOOT_PATH}${PART_SUFFIX}1"
+mkfs.ext4 -F -L sovran_systemsos "${BOOT_PATH}${PART_SUFFIX}2"
+
+if [ -n "$DATA_DISK" ]; then
+  DATA_PATH="/dev/${DATA_DISK}"
+  part_suffix_data=""
+  if [[ "$DATA_DISK" =~ ^(nvme|mmcblk) ]]; then
+    part_suffix_data="p"
+  fi
+
+  parted --script "$DATA_PATH" mklabel gpt
+  parted --script "$DATA_PATH" mkpart primary ext4 1MiB 100%
+  partprobe "$DATA_PATH"
+  udevadm settle
+  mkfs.ext4 -F -L BTCEcoandBackup "${DATA_PATH}${part_suffix_data}1"
+fi
+
+mkdir -p /mnt
+mount /dev/disk/by-label/sovran_systemsos /mnt
+mkdir -p /mnt/boot/efi
+mount /dev/disk/by-label/boot /mnt/boot/efi
+
+if [ -n "$DATA_DISK" ]; then
+  mkdir -p /mnt/run/media/Second_Drive
+  mount /dev/disk/by-label/BTCEcoandBackup /mnt/run/media/Second_Drive
+fi
+
+nixos-generate-config --root /mnt
+
+cp /mnt/etc/nixos/hardware-configuration.nix /tmp/hardware-configuration.nix
+rm -rf /mnt/etc/nixos/*
+cp -a /etc/sovran/flake/* /mnt/etc/nixos/
+cp /tmp/hardware-configuration.nix /mnt/etc/nixos/hardware-configuration.nix
+
+cat > /mnt/etc/nixos/custom.nix <<EOF
+{ config, lib, ... }:
+{
+  sovran_systemsOS.roles.server-desktop = ${ROLE == "Server-Desktop (default)"};
+  sovran_systemsOS.roles.desktop = ${ROLE == "Desktop"};
+  sovran_systemsOS.roles.node = ${ROLE == "Node (Bitcoin-only)"};
+}
+EOF
+
+nixos-install --root /mnt --flake /mnt/etc/nixos#nixos
+
+zenity --info --text="Install complete. Rebooting..."
+reboot

iso/iso_plymouth-theme.nix

@@ -0,0 +1,44 @@
+{ pkgs, lib }:
+
+pkgs.stdenv.mkDerivation {
+  pname = "sovran-plymouth-theme";
+  version = "1.0";
+
+  src = ./.;
+
+  installPhase = ''
+    mkdir -p $out/share/plymouth/themes/sovran
+    cp ${./assets/splash-logo.png} $out/share/plymouth/themes/sovran/logo.png
+
+    cat > $out/share/plymouth/themes/sovran/sovran.plymouth <<'EOF'
+[Plymouth Theme]
+Name=Sovran Systems
+Description=Sovran Systems Splash
+ModuleName=script
+
+[script]
+ImageDir=/share/plymouth/themes/sovran
+ScriptFile=/share/plymouth/themes/sovran/sovran.script
+EOF
+
+    cat > $out/share/plymouth/themes/sovran/sovran.script <<'EOF'
+# Background color: #CFFFD7 (RGB 207,255,215)
+bg_r = 207/255.0
+bg_g = 255/255.0
+bg_b = 215/255.0
+
+Window.SetBackgroundTopColor (bg_r, bg_g, bg_b);
+Window.SetBackgroundBottomColor (bg_r, bg_g, bg_b);
+
+logo = Image("logo.png");
+logo_sprite = Sprite(logo);
+logo_sprite.SetX((Window.GetWidth() - logo.GetWidth()) / 2);
+logo_sprite.SetY((Window.GetHeight() - logo.GetHeight()) / 2);
+
+spinner = Sprite();
+spinner.SetImage(Spinner());
+spinner.SetX((Window.GetWidth() - spinner.GetImage().GetWidth()) / 2);
+spinner.SetY((Window.GetHeight() + logo.GetHeight()) / 2 + 20);
+EOF
+  '';
+}

iso/iso_server.nix

@@ -0,0 +1,5 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [ ./common.nix ];
+}