modifications to steamdeck hardware, allow for hp printing and switched up v4lloopback module. included cachix in again, along with devenv support

hosts/common.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, ... }:
+{
+  # Enable CUPS printing service
+  services.printing.enable = true;
+
+  # Enable network printer discovery
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
+
+  # Install HP printer drivers
+  services.printing.drivers = [
+    pkgs.hplip
+    pkgs.hplipWithPlugin # For printers requiring proprietary plugins
+  ];
+}

hosts/steamdeck/cachix.nix

@@ -0,0 +1,13 @@
+# WARN: this file will get overwritten by $ cachix use <name>
+{ pkgs, lib, ... }:
+
+let
+  folder = ./cachix;
+  toImport = name: value: folder + ("/" + name);
+  filterCaches = key: value: value == "regular" && lib.hasSuffix ".nix" key;
+  imports = lib.mapAttrsToList toImport (lib.filterAttrs filterCaches (builtins.readDir folder));
+in
+{
+  inherit imports;
+  nix.settings.substituters = [ "https://cache.nixos.org/" ];
+}

hosts/steamdeck/cachix/devenv.nix

@@ -0,0 +1,13 @@
+
+{
+  nix = {
+    settings = {
+      substituters = [
+        "https://devenv.cachix.org"
+      ];
+      trusted-public-keys = [
+        "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
+      ];
+    };
+  };
+}

hosts/steamdeck/configuration.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, ... }:
+{ config, pkgs, lib, ... }:
 
 let
   jovianNixosRev = "f6423d86bec22c25a576b23262495c5536b0d069";
@@ -18,29 +18,23 @@ in
 {
   imports = [
     ./hardware-configuration.nix
+    (fetchTarball "https://github.com/nix-community/nixos-vscode-server/tarball/master")
     (jovianNixos + "/modules")
+    ./cachix.nix
   ];
 
   # Basic System Configuration
   system.stateVersion = "24.05";
-  networking = {
-    hostName = "steamnix";
-    networkmanager.enable = true;
+
+  # Printing Configuration
+  services.printing = {
+    enable = true;
+    drivers = [ pkgs.hplipWithPlugin ];
   };
-  time.timeZone = "America/Los_Angeles";
-  i18n = {
-    defaultLocale = "en_US.UTF-8";
-    extraLocaleSettings = {
-      LC_ADDRESS = "en_US.UTF-8";
-      LC_IDENTIFICATION = "en_US.UTF-8";
-      LC_MEASUREMENT = "en_US.UTF-8";
-      LC_MONETARY = "en_US.UTF-8";
-      LC_NAME = "en_US.UTF-8";
-      LC_NUMERIC = "en_US.UTF-8";
-      LC_PAPER = "en_US.UTF-8";
-      LC_TELEPHONE = "en_US.UTF-8";
-      LC_TIME = "en_US.UTF-8";
-    };
+
+  services.avahi = {
+    enable = true;
+    nssmdns = true;
   };
 
   # Nix Package Manager Configuration
@@ -53,12 +47,18 @@ in
 
   nix.settings = {
     experimental-features = [ "nix-command" "flakes" ];
-    substituters = [ "cache.nixos.org" ];
+    substituters = [ "https://cache.nixos.org" ];
     allowed-users = [ "@wheel" "jeirmeister" ];
     auto-optimise-store = true;
   };
 
-  # Steam Deck Specific Configuration
+  nix.extraOptions = ''
+    trusted-users = root jeirmeister
+    extra-substituters = https://nixpkgs-python.cachix.org https://devenv.cachix.org
+    extra-trusted-public-keys = nixpkgs-python.cachix.org-1:hxjI7pFxTyuTHn2NkvWCrAUcNZLNS3ZAvfYNuYifcEU= devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=
+  '';
+
+  # Steam Deck Configuration
   jovian = {
     hardware.has.amd.gpu = true;
     devices.steamdeck = {
@@ -77,11 +77,6 @@ in
     workarounds.ignoreMissingKernelModules = true;
   };
 
-  # Hardware and Display Configuration
-  hardware.video = {
-    displaylink.enable = true;
-  };
-
   # Desktop Environment and Display Configuration
   services.xserver = {
     enable = true;
@@ -89,14 +84,15 @@ in
     videoDrivers = [ "displaylink" "modesetting" ];
     desktopManager.plasma6 = {
       enable = true;
-      extraSessionCommands = ''
-        ${pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource 2 0;
-      '';
     };
     displayManager = {
       sddm = {
         enable = true;
-        wayland = true;
+        settings = {
+          Wayland = {
+            EnableHiDPI = true;
+          };
+        };
       };
       sessionCommands = ''
         ${lib.getBin pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource 2 0
@@ -104,6 +100,17 @@ in
     };
   };
 
+  # VS Code Server Configuration
+  services.vscode-server = {
+    enable = true;
+    enableFHS = true;
+  };
+
+  programs.nix-ld = {
+    enable = true;
+    package = pkgs.nix-ld-rs;
+  };
+
   # System Services Configuration
   services = {
     # Audio Configuration
@@ -139,6 +146,21 @@ in
       };
     };
 
+    # Uncomment when ready to use Immersed
+    # immersed-video = {
+    #   description = "Load v4l2loopback module for Immersed";
+    #   wantedBy = [ "multi-user.target" ];
+    #   after = [ "systemd-modules-load.service" ];
+    #   requires = [ "systemd-modules-load.service" ];
+    #   serviceConfig = {
+    #     Type = "oneshot";
+    #     RemainAfterExit = true;
+    #     ExecStartPre = "${pkgs.kmod}/bin/modprobe -r v4l2loopback || true";
+    #     ExecStart = "${pkgs.kmod}/bin/modprobe v4l2loopback exclusive_caps=1 video_nr=0 card_label='Immersed Virtual Camera'";
+    #     ExecStop = "${pkgs.kmod}/bin/rmmod v4l2loopback || true";
+    #   };
+    # };
+
     "systemd-modules-load" = {
       wantedBy = [ "multi-user.target" ];
       restartIfChanged = true;
@@ -147,10 +169,17 @@ in
 
   # UDev Rules
   services.udev.extraRules = ''
+    # Steam Deck Fan Control
     SUBSYSTEM=="hwmon*", KERNEL=="hwmon*", ACTION=="add", RUN+="${pkgs.coreutils}/bin/chmod a+rw /sys/%p/pwm1"
     SUBSYSTEM=="hwmon*", KERNEL=="hwmon*", ACTION=="add", RUN+="${pkgs.coreutils}/bin/chmod a+rw /sys/%p/fan1_input"
   '';
 
+  # Network Configuration
+  networking = {
+    hostName = "steamnix";
+    networkmanager.enable = true;
+  };
+
   # User Configuration
   users = {
     users.jeirmeister = {
@@ -174,8 +203,8 @@ in
 
     groups = {
       steamos.gid = 1000;
-      gamepad = {};
-      render = {};
+      gamepad = { };
+      render = { };
     };
   };
 
@@ -192,6 +221,9 @@ in
     dmidecode
     binutils
 
+    # Scanner & Printers
+    epsonscan2
+
     # Virtual Display
     linuxPackages.v4l2loopback
     v4l-utils
@@ -207,19 +239,21 @@ in
     # Utilities
     tree
   ];
+
+  # Locale and Time
+  time.timeZone = "America/Los_Angeles";
+  i18n = {
+    defaultLocale = "en_US.UTF-8";
+    extraLocaleSettings = {
+      LC_ADDRESS = "en_US.UTF-8";
+      LC_IDENTIFICATION = "en_US.UTF-8";
+      LC_MEASUREMENT = "en_US.UTF-8";
+      LC_MONETARY = "en_US.UTF-8";
+      LC_NAME = "en_US.UTF-8";
+      LC_NUMERIC = "en_US.UTF-8";
+      LC_PAPER = "en_US.UTF-8";
+      LC_TELEPHONE = "en_US.UTF-8";
+      LC_TIME = "en_US.UTF-8";
+    };
+  };
 }
-# TODO: Incorporate this part later
-    # Immersed Video Service
-    # immersed-video = {
-    #   description = "Load v4l2loopback module for Immersed";
-    #   wantedBy = [ "multi-user.target" ];
-    #   after = [ "systemd-modules-load.service" ];
-    #   requires = [ "systemd-modules-load.service" ];
-    #   serviceConfig = {
-    #     Type = "oneshot";
-    #     RemainAfterExit = true;
-    #     ExecStartPre = "${pkgs.kmod}/bin/modprobe -r v4l2loopback || true";
-    #     ExecStart = "${pkgs.kmod}/bin/modprobe v4l2loopback exclusive_caps=1 video_nr=0 card_label='Immersed Virtual Camera'";
-    #     ExecStop = "${pkgs.kmod}/bin/rmmod v4l2loopback || true";
-    #   };
-    # };

hosts/steamdeck/hardware-configuration.nix

@@ -1,39 +1,84 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# Do not modify this file!  It was generated by 'nixos-generate-config'
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{ config, lib, modulesPath, ... }:
+{ config, lib, pkgs, modulesPath, ... }:
 
 {
   imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
+    [
+      (modulesPath + "/installer/scan/not-detected.nix")
     ];
 
-  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usb_storage" "usbhid" "sd_mod" "sdhci_pci" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-amd" ];
-  boot.extraModulePackages = [ ];
+  # Hardware Configuration
+  hardware = {
+    enableRedistributableFirmware = lib.mkForce true;
+    firmware = lib.mkForce [ pkgs.linux-firmware ];
 
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/f3cc4aae-428e-435d-b9f7-333f7dad06b2";
-      fsType = "ext4";
+    graphics = {
+      enable = true;
+      enable32Bit = true;
+      extraPackages = with pkgs; [
+        libva
+        vaapiVdpau
+        v4l-utils
+      ];
     };
 
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/580E-5E90";
-      fsType = "vfat";
-      options = [ "fmask=0077" "dmask=0077" ];
+    cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+  };
+
+  # Boot Configuration
+  boot = {
+    loader = {
+      systemd-boot.enable = true;
+      efi.canTouchEfiVariables = true;
     };
 
-  swapDevices = [ ];
+    initrd = {
+      availableKernelModules = [
+        "nvme"
+        "xhci_pci"
+        "usbhid"
+        "usb_storage"
+        "sd_mod"
+        "sdhci_pci"
+      ];
+      kernelModules = [ "amdgpu" "kvm-amd" ];
+    };
 
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+    kernelModules = [ "amdgpu" "v4l2loopback" "snd-aloop" "kvm-amd" ];
+    extraModulePackages = [ pkgs.linuxPackages_latest.v4l2loopback ];
+  };
+
+  # Filesystem Configuration
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/f3cc4aae-428e-435d-b9f7-333f7dad06b2";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/580E-5E90";
+    fsType = "vfat";
+    options = [ "fmask=0077" "dmask=0077" ];
+  };
+
+  # Optional SteamOS games mount (commented out)
+  # fileSystems."/mnt/steamos" = {
+  #   device = "/dev/disk/by-uuid/5261b393-9b3e-4334-9ddf-4a1eb9865905";
+  #   fsType = "ext4";
+  # };
+
+  # Swap Configuration
+  swapDevices = [ ]; #TODO: consider releasing the zram swapfile and utilizing the one already on steamos
+
+  # Network Configuration
   networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp4s0f3u1u4u3.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp4s0f3u1u4u4.useDHCP = lib.mkDefault true;
   # networking.interfaces.wlo1.useDHCP = lib.mkDefault true;
 
+  # Platform Configuration
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  # System State Version
+  system.stateVersion = "24.05";
 }

users/jeirmeister/programs/system/appimage.nix

@@ -1,13 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  home.packages = with pkgs; [
-    # Required for AppImage support
-    appimage-run
-    
-    # Optional but useful tools for AppImage management
-    zlib
-    fuse
-    fuse3
-  ];
-}

users/jeirmeister/programs/system/default.nix

@@ -1,8 +1,16 @@
 { config, pkgs, ... }:
 
 {
-  imports = [
-        ./appimage.nix
-        ./tailscale.nix
+  home.packages = with pkgs; [
+    # Required for AppImage support
+    appimage-run
+
+    # Optional but useful tools for AppImage management
+    zlib
+    fuse
+    fuse3
+    tailscale
   ];
+
+
 }

users/jeirmeister/programs/system/tailscale.nix

@@ -1,7 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  home.packages = with pkgs; [
-    tailscale
-  ];
-}