KioskConfig/flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    disko.url = "github:nix-community/disko";
    disko.inputs.nixpkgs.follows = "nixpkgs";
    nixos-facter-modules.url = "github:numtide/nixos-facter-modules";
    radiantwave.url = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/radiantwave.git?ref=main";
    radiantwave-dev.url = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/radiantwave.git?ref=dev";
    nixos-raspberrypi.url = "github:nvmd/nixos-raspberrypi/main";
  };

  outputs =
    {
      self,
      nixpkgs,
      disko,
      nixos-facter-modules,
      radiantwave,
      radiantwave-dev,
      nixos-raspberrypi,
      ...
    }@inputs:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};

      # Plymouth theme: renders the RadiantWave SVG to a full-HD splash.png
      # at build time (librsvg), so the theme is hermetic and resolution-
      # independent. The .plymouth file's /usr paths are rewritten to $out
      # (the NixOS module's initrd fixup rewrites store paths again).
      radiantwavePlymouth = pkgs.stdenv.mkDerivation {
        pname = "radiantwave-plymouth";
        version = "1.0.0";

        nativeBuildInputs = [ pkgs.librsvg ];

        src = ./assets/RWT-Circular-Color-ForOnDark.svg;
        dontUnpack = true;

        buildPhase = ''
          mkdir -p $out/share/plymouth/themes/radiantwave
          rsvg-convert \
            --keep-aspect-ratio \
            --background-color=#111318 \
            --width=1280 \
            --height=720 \
            --output=$out/share/plymouth/themes/radiantwave/splash.png \
            $src
          sed 's,/usr/,'"$out"'/,g' ${./plymouth-theme/radiantwave.plymouth} \
            > $out/share/plymouth/themes/radiantwave/radiantwave.plymouth
          cp ${./plymouth-theme/radiantwave.script} \
            $out/share/plymouth/themes/radiantwave/radiantwave.script
        '';
      };

      revision = self.rev or self.dirtyRev or null;

      mkKioskSystem = {
        system,
        radiantwave,
        upgradeFlakeRef,
        hostName,
        diskModule,
        extraModules ? [],
      }:
        nixpkgs.lib.nixosSystem {
          inherit system;

          specialArgs = {
            inherit radiantwave;
            inherit upgradeFlakeRef;
            inherit radiantwavePlymouth;
          };

          modules = [
            { nixpkgs.config.allowUnfree = true; }
            {
              networking.hostName = hostName;
              system.configurationRevision = revision;
            }
            ./configuration.nix
            disko.nixosModules.disko
            diskModule
            nixos-facter-modules.nixosModules.facter
            # Hardware facter report. This is a NUC 14 report currently
            # applied to every x86 variant (including commercial SATA
            # hardware). To use per-model reports: generate them on each
            # hardware target (procedure in AGENTS.md), commit them as
            # facter-<model>.json, and select per variant here, e.g.:
            #   { facter.reportPath = ./facter-commercial.json; }
            { facter.reportPath = ./facter.json; }
            radiantwave.nixosModules.default
          ] ++ extraModules;
        };

      mkRpiKioskSystem = {
        radiantwave,
        upgradeFlakeRef,
        hostName,
        extraModules ? [],
      }:
        nixos-raspberrypi.lib.nixosSystem {
          specialArgs = {
            inherit radiantwave upgradeFlakeRef;
            inherit nixos-raspberrypi;
            inherit radiantwavePlymouth;
          };

          modules = [
            ({ ... }: {
              imports = with nixos-raspberrypi.nixosModules; [
                sd-image
                raspberry-pi-5.base
                raspberry-pi-5.page-size-16k
                raspberry-pi-5.display-vc4
              ];
            })
            ./configuration.nix
            radiantwave.nixosModules.default
            {
              networking.hostName = hostName;
              system.configurationRevision = revision;

              boot.loader.systemd-boot.enable = nixpkgs.lib.mkForce false;
              boot.loader.efi.canTouchEfiVariables = nixpkgs.lib.mkForce false;
              boot.loader.raspberry-pi.bootloader = "kernel";

              nix.settings.extra-substituters = [
                "https://nixos-raspberrypi.cachix.org"
              ];
              nix.settings.extra-trusted-public-keys = [
                "nixos-raspberrypi.cachix.org-1:4iMO9LXa8BqhU+Rpg6LQKiGa2lsNh/j2oiYLNOQ5sPI="
              ];
            }
          ] ++ extraModules;
        };

      # Zero-touch USB installer image. `targetConfig` names the kiosk system
      # to install: the closure comes from the packages output below and the
      # partitioning script from the paired disk module, so the ISO always
      # installs the matching system for its hardware.
      mkIso = { targetConfig, diskModule }:
        nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";

          specialArgs = {
            inherit inputs;
            inherit self;
          };

          modules = [
            "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
            disko.nixosModules.disko
            (import ./zero-touch-installer.nix { inherit targetConfig; })
            diskModule
            ({ pkgs, ... }: {
              environment.systemPackages = [
                disko.packages.${system}.default
              ];
              isoImage.storeContents = [
                self.packages.x86_64-linux.${targetConfig}
              ];
              environment.etc."disko-config.nix".source = diskModule;
            })
          ];
        };
    in
    {
      packages.x86_64-linux.radiantwavekiosk = self.nixosConfigurations.radiantwavekiosk.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-dev = self.nixosConfigurations.radiantwavekiosk-dev.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-commercial = self.nixosConfigurations.radiantwavekiosk-commercial.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-commercial-dev = self.nixosConfigurations.radiantwavekiosk-commercial-dev.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-android = self.nixosConfigurations.radiantwavekiosk-android.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-android-dev = self.nixosConfigurations.radiantwavekiosk-android-dev.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-rpi = self.nixosConfigurations.radiantwavekiosk-rpi.config.system.build.toplevel;
      packages.x86_64-linux.radiantwavekiosk-rpi-dev = self.nixosConfigurations.radiantwavekiosk-rpi-dev.config.system.build.toplevel;

      # Kiosk systems.
      #
      # Production variants consume the `radiantwave` input (?ref=main);
      # `-dev` variants consume `radiantwave-dev` (?ref=dev) and track the
      # dev branch of this repo via their autoUpgrade flake refs.
      nixosConfigurations = {
        radiantwavekiosk = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave;
          hostName = "radiantwavekiosk";
          diskModule = ./disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git#radiantwavekiosk";
        };
        radiantwavekiosk-dev = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave-dev;
          hostName = "radiantwavekiosk-dev";
          diskModule = ./disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git?ref=dev#radiantwavekiosk-dev";
        };
        radiantwavekiosk-commercial = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave;
          hostName = "radiantwavekiosk-commercial";
          diskModule = ./commercial-disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git#radiantwavekiosk-commercial";
        };
        radiantwavekiosk-commercial-dev = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave-dev;
          hostName = "radiantwavekiosk-commercial-dev";
          diskModule = ./commercial-disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git?ref=dev#radiantwavekiosk-commercial-dev";
        };
        # Rotated screen for android-style displays.
        radiantwavekiosk-android = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave;
          hostName = "radiantwavekiosk-android";
          diskModule = ./disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git#radiantwavekiosk-android";
          extraModules = [
            ./rotated_display.nix
            ./edid-override.nix
            { services.kioskEdid = {
                enable = false;
                overrides = [
                  { connector = "HDMI-A-2"; edidFile = ./android-kiosk-edid.bin; }
                ];
              };
            }
          ];
        };
        radiantwavekiosk-android-dev = mkKioskSystem {
          system = "x86_64-linux";
          radiantwave = radiantwave-dev;
          hostName = "radiantwavekiosk-android-dev";
          diskModule = ./disk-config.nix;
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git?ref=dev#radiantwavekiosk-android-dev";
          extraModules = [
            ./rotated_display.nix
            ./edid-override.nix
            { services.kioskEdid = {
                enable = false;
                overrides = [
                  { connector = "HDMI-A-2"; edidFile = ./android-kiosk-edid.bin; }
                ];
              };
            }
          ];
        };
        # Raspberry Pi 5.
        radiantwavekiosk-rpi = mkRpiKioskSystem {
          radiantwave = radiantwave;
          hostName = "radiantwavekiosk-rpi";
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git#radiantwavekiosk-rpi";
        };
        radiantwavekiosk-rpi-dev = mkRpiKioskSystem {
          radiantwave = radiantwave-dev;
          hostName = "radiantwavekiosk-rpi-dev";
          upgradeFlakeRef = "git+https://gitea.radiantwavetech.com/RadiantWaveTech/KioskConfig.git?ref=dev#radiantwavekiosk-rpi-dev";
        };

        # === USB Images ===
        # Each ISO installs exactly the named system closure using that
        # system's disk layout. NVMe layouts pair with ./disk-config.nix,
        # SATA with ./commercial-disk-config.nix — don't cross them.
        kiosk-iso = mkIso {
          targetConfig = "radiantwavekiosk";
          diskModule = ./disk-config.nix;
        };
        commercial-iso = mkIso {
          targetConfig = "radiantwavekiosk-commercial";
          diskModule = ./commercial-disk-config.nix;
        };
        android-iso = mkIso {
          targetConfig = "radiantwavekiosk-android";
          diskModule = ./disk-config.nix;
        };
        dev-iso = mkIso {
          targetConfig = "radiantwavekiosk-dev";
          diskModule = ./disk-config.nix;
        };
        commercial-dev-iso = mkIso {
          targetConfig = "radiantwavekiosk-commercial-dev";
          diskModule = ./commercial-disk-config.nix;
        };
        android-dev-iso = mkIso {
          targetConfig = "radiantwavekiosk-android-dev";
          diskModule = ./disk-config.nix;
        };
      };
    };
}