From 415d9e829f6f6c78931b132f8d0774ad20828d12 Mon Sep 17 00:00:00 2001
From: Michael Smith <m@michaelsmith.be>
Date: Thu, 5 Sep 2024 17:51:22 +0200
Subject: [PATCH] Add installer image package

---
 flake.nix                            |  16 +++
 machines/installer-image/default.nix | 183 +++++++++++++++++++++++++++
 2 files changed, 199 insertions(+)
 create mode 100644 machines/installer-image/default.nix

diff --git a/flake.nix b/flake.nix
index 7127f5c..62cfb0e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -76,6 +76,22 @@
       '';
 
       installer-iso = inputs.self.nixosConfigurations.installer.config.system.build.isoImage;
+
+      installer-image = nixos-generators.nixosGenerate {
+        system = system;
+        specialArgs = {
+          pkgs = pkgs;
+          diskSize = 20 * 1024;
+        };
+        modules = [
+          # Pin nixpkgs to the flake input, so that the packages installed
+          # come from the flake inputs.nixpkgs.url.
+          ({ ... }: { nix.registry.nixpkgs.flake = nixpkgs; })
+          # Apply the rest of the config.
+          ./machines/installer-image
+        ];
+        format = "raw-efi";
+      };
     });
 
     apps = forAllSystems (system: {
diff --git a/machines/installer-image/default.nix b/machines/installer-image/default.nix
new file mode 100644
index 0000000..dcb7707
--- /dev/null
+++ b/machines/installer-image/default.nix
@@ -0,0 +1,183 @@
+{
+  config,
+  lib,
+  options,
+  pkgs,
+  inputs,
+  modulesPath,
+  ...
+}:
+with lib; let
+  calamares-nixos-autostart = pkgs.makeAutostartItem {
+    name = "io.calamares.calamares";
+    package = pkgs.calamares-nixos;
+  };
+  calamares-extensions-desk-os = pkgs.callPackage ../../packages/calamares-extensions {};
+in {
+  imports = [
+    (modulesPath + "/profiles/all-hardware.nix")
+    (modulesPath + "/profiles/base.nix")
+    (modulesPath + "/profiles/installation-device.nix")
+  ];
+
+  nixpkgs = {
+    hostPlatform = lib.mkDefault "x86_64-linux";
+    config.allowUnfree = true;
+  };
+
+  nix = {
+    settings.experimental-features = ["nix-command" "flakes"];
+    extraOptions = "experimental-features = nix-command flakes";
+  };
+
+  boot = {
+    supportedFilesystems = lib.mkForce ["btrfs" "reiserfs" "vfat" "f2fs" "xfs" "ntfs" "cifs"];
+  };
+
+  networking.hostName = "desk-os-installer";
+
+  services.openssh.enable = lib.mkForce false;
+
+  # Inhibit sleep, suspend, hibernate
+  systemd.targets = {
+    sleep.enable = false;
+    suspend.enable = false;
+    hibernate.enable = false;
+    hybrid-sleep.enable = false;
+  };
+
+  boot = {
+    consoleLogLevel = 0;
+    kernelParams = ["quiet"];
+    initrd.verbose = false;
+    loader.systemd-boot.enable = true;
+    loader.timeout = lib.mkForce 0;
+    plymouth = {
+      enable = true;
+      theme = "breeze";
+    };
+  };
+
+  # Adds terminus_font for people with HiDPI displays
+  console.packages = options.console.packages.default ++ [pkgs.terminus_font];
+
+  # An installation media cannot tolerate a host config defined file
+  # system layout on a fresh machine, before it has been formatted.
+  swapDevices = mkImageMediaOverride [];
+  # fileSystems = mkImageMediaOverride config.lib.isoFileSystems;
+
+  boot.postBootCommands = ''
+    for o in $(</proc/cmdline); do
+      case "$o" in
+        live.nixos.passwd=*)
+          set -- $(IFS==; echo $o)
+          echo "nixos:$2" | ${pkgs.shadow}/bin/chpasswd
+          ;;
+      esac
+    done
+  '';
+
+  system.stateVersion = lib.mkDefault lib.trivial.release;
+
+  # Whitelist wheel users to do anything
+  # This is useful for things like pkexec
+  #
+  # WARNING: this is dangerous for systems
+  # outside the installation-cd and shouldn't
+  # be used anywhere else.
+  security.polkit.extraConfig = ''
+    polkit.addRule(function(action, subject) {
+      if (subject.isInGroup("wheel")) {
+        return polkit.Result.YES;
+      }
+    });
+  '';
+
+  services.xserver.enable = true;
+
+  # Provide networkmanager for easy wireless configuration.
+  networking.networkmanager.enable = true;
+  networking.wireless.enable = mkImageMediaOverride false;
+
+  # KDE complains if power management is disabled (to be precise, if
+  # there is no power management backend such as upower).
+  powerManagement.enable = true;
+
+  # Enable sound in graphical iso's.
+  hardware.pulseaudio.enable = true;
+
+  # VM guest additions to improve host-guest interaction
+  services.spice-vdagentd.enable = true;
+  services.qemuGuest.enable = true;
+  virtualisation.vmware.guest.enable = pkgs.stdenv.hostPlatform.isx86;
+  virtualisation.hypervGuest.enable = true;
+  services.xe-guest-utilities.enable = pkgs.stdenv.hostPlatform.isx86;
+  # The VirtualBox guest additions rely on an out-of-tree kernel module
+  # which lags behind kernel releases, potentially causing broken builds.
+  virtualisation.virtualbox.guest.enable = false;
+
+  environment.defaultPackages = with pkgs; [
+    # Include gparted for partitioning disks.
+    gparted
+
+    # Include some editors.
+    vim
+    nano
+
+    # Include some version control tools.
+    git
+    rsync
+  ];
+
+  environment.systemPackages = with pkgs; [
+    # Calamares for graphical installation
+    libsForQt5.kpmcore
+    calamares-nixos
+    calamares-nixos-autostart
+    calamares-extensions-desk-os
+    # Get list of locales
+    glibcLocales
+    gnomeExtensions.no-overview
+  ];
+
+  # Support choosing from any locale
+  i18n.supportedLocales = ["all"];
+
+  services.xserver.desktopManager.gnome = {
+    favoriteAppsOverride = ''
+      [org.gnome.shell]
+      favorite-apps=[ 'io.calamares.calamares.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Console.desktop' ]
+      enabled-extensions=[ '${pkgs.gnomeExtensions.no-overview.extensionUuid}' ]
+    '';
+
+    # Override GNOME defaults to disable GNOME tour and disable suspend
+    extraGSettingsOverrides = ''
+      [org.gnome.shell]
+      welcome-dialog-last-shown-version='9999999999'
+      [org.gnome.desktop.session]
+      idle-delay=0
+      [org.gnome.settings-daemon.plugins.power]
+      sleep-inactive-ac-type='nothing'
+      sleep-inactive-battery-type='nothing'
+    '';
+
+    extraGSettingsOverridePackages = [pkgs.gnome.gnome-settings-daemon];
+
+    enable = true;
+  };
+
+  # Fix scaling for calamares on wayland
+  environment.variables = {
+    QT_QPA_PLATFORM = "$([[ $XDG_SESSION_TYPE = \"wayland\" ]] && echo \"wayland\")";
+  };
+
+  services.xserver.displayManager.gdm = {
+    enable = true;
+    autoSuspend = false;
+  };
+
+  services.displayManager.autoLogin = {
+    enable = true;
+    user = "nixos";
+  };
+}