First redesign commit

lib originates from Max
Co-authored-by: Maximilan Marx <maximilian.marx@tu-dresden.de>

flake.lock

@@ -39,6 +39,29 @@
         "type": "github"
       }
     },
+    "dwarffs": {
+      "inputs": {
+        "nix": [
+          "nix"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1646560263,
+        "narHash": "sha256-VYJFoEigK0DASnBiYUhQBe0c0O4mlcoGBlYN8qs2TOo=",
+        "owner": "edolstra",
+        "repo": "dwarffs",
+        "rev": "e768ce3239156de05f7ff3210d86a80762730f30",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "dwarffs",
+        "type": "github"
+      }
+    },
     "emacs-overlay": {
       "locked": {
         "lastModified": 1651750171,
@@ -70,6 +93,39 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1644229661,
+        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils-plus": {
+      "inputs": {
+        "flake-utils": "flake-utils"
+      },
+      "locked": {
+        "lastModified": 1647259887,
+        "narHash": "sha256-yEkMbEHVO9qydluQ3uHGWX1PkfZhgDKxnd1rhZYZ72w=",
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "rev": "06dba5f3b4fa2cc0bfc98ce9cd6f9a4d8db11d46",
+        "type": "github"
+      },
+      "original": {
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -91,6 +147,22 @@
         "type": "github"
       }
     },
+    "lowdown-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1633514407,
+        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "type": "github"
+      }
+    },
     "naersk": {
       "inputs": {
         "nixpkgs": "nixpkgs"
@@ -110,6 +182,28 @@
         "type": "github"
       }
     },
+    "nix": {
+      "inputs": {
+        "lowdown-src": "lowdown-src",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-regression": "nixpkgs-regression"
+      },
+      "locked": {
+        "lastModified": 1651760216,
+        "narHash": "sha256-g3GDM8MSzJ27hJoGWj2QGjINZP/I1KCJpZZn+iPMmfM=",
+        "owner": "NixOS",
+        "repo": "nix",
+        "rev": "f4102de84ba4dd3b845a3e34fabab5400e066ad0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1650522846,
@@ -169,6 +263,21 @@
         "type": "indirect"
       }
     },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "indirect"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1651558728,
@@ -219,8 +328,11 @@
     "root": {
       "inputs": {
         "comma": "comma",
+        "dwarffs": "dwarffs",
         "emacs-overlay": "emacs-overlay",
+        "flake-utils-plus": "flake-utils-plus",
         "home-manager": "home-manager",
+        "nix": "nix",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-unstable": "nixpkgs-unstable",

flake.nix

@@ -1,11 +1,16 @@
 {
-  description = "Flake to generate NixOS configurations";
+  description = "Flake to define configurations of 'elss' - ellmauthaler stefan's systems";
 
   inputs = {
     
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-21.11";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
 
+    nix = {
+      url = "github:NixOS/nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     nixos-hardware = {
       url = "github:NixOS/nixos-hardware/master";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -21,8 +26,14 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    flake-utils-plus = {
+      url = "github:gytis-ivaskevicius/flake-utils-plus";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    
     emacs-overlay = {
       url = "github:nix-community/emacs-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
 
     simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-21.11";
@@ -31,16 +42,75 @@
       url = "github:Mic92/sops-nix/master";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    dwarffs = {
+      url = "github:edolstra/dwarffs";
+      inputs = {
+        nix.follows = "nix";
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
   };
 
-  outputs = {self, ...}@inputs: 
-    let outputs = rec {
-          overlay = import ./local-overlay;
-          nixosConfigurations = import self {
-            flakes = inputs;
-            flakeOutputs = outputs;
+  outputs = {self, nixpkgs, flake-utils-plus, ...}@inputs:
+    let
+      extended-lib = nixpkgs.lib.extend
+        (final: prev: {
+          elss = (import ./lib {lib = final; }) prev;
+        });
+      inherit (extended-lib.elss) discoverModules moduleNames;
+    in
+      flake-utils-plus.lib.mkFlake rec{
+        inherit self inputs;
+        supportedSystems = [ "x86_64-linux" ];
+
+        lib = extended-lib;
+
+        channelsConfig = {
+          allowUnfreePredicate = pkg: builtins.elem (extended-lib.getName pkg) [
+            "steam"
+            "steam-original"
+            "steam-runtime"
+            "skypeforlinux"
+            "teams"
+            "zoom"
+          ];
         };
-          nixosModules = {};
+
+        channels.nixpkgs.overlaysBuilder = channels: [
+          (final: prev: {
+            unstable = channels.nixpkgs-unstable;
+          })
+          inputs.nix.overlay
+          inputs.emacs-overlay.overlay
+        ];
+
+        hostDefaults = {
+          system = "x86_64-linux";
+          channelName = "nixpkgs";
+          modules = [
+            inputs.home-manager.nixosModules.home-manager
+            inputs.dwarffs.nixosModules.dwarffs
+          ] ++ (map (name: ./modules + "/${name}") (moduleNames ./modules));
+          extraArgs = { inherit inputs homeConfigurations; };
+        };
+
+        hosts = discoverModules ./machines (name: {
+          modules = [ (./machines + "/${name}") ];
+          specialArgs = { lib = extended-lib; };
+        });
+
+        homeConfigurations = discoverModules ./users
+        (name:
+          let
+            username = extended-lib.removeSuffix ".nix" name;
+          in
+            inputs.home-manager.lib.homeManagerConfiguration {
+              configuration = import (./users + "/${name}");
+              inherit username;
+              system = "x86_64-linux";
+              homeDirectory = "/home/${username}";
+              stateVersion = "21.11";
+            });        
       };
-    in outputs;
 }

lib/default.nix

@@ -0,0 +1,6 @@
+{ lib }:
+
+(lib.composeManyExtensions [
+  (import ./users.nix)
+  (import ./files.nix)
+]) lib

lib/files.nix

@@ -0,0 +1,14 @@
+final: prev:
+
+with prev; rec {
+  moduleNames = dir: pipe dir [
+    builtins.readDir
+    (filterAttrs (name: type: !hasPrefix "." name && (hasSuffix ".nix" name || type == "directory")))
+    attrNames
+  ];
+  discoverModules = dir: f:
+    listToAttrs (map
+      (filename:
+        nameValuePair (removeSuffix ".nix" filename) (f filename))
+      (moduleNames dir));
+}

lib/users.nix

@@ -0,0 +1,19 @@
+final: prev:
+
+{
+  withConfig = config:
+
+    let
+      cfg = config.elss.users;
+      mapAccount = f: login: prev.nameValuePair login (f login);
+      mapList = f: lst: builtins.listToAttrs (map (mapAccount f) lst);
+    in
+    rec {
+      mapUsers = f: mapList f cfg.users;
+      mapAdmins = f: mapList f cfg.admins;
+      mapAllUsers = f: (mapUsers f) // (mapAdmins f);
+      mapAllUsersAndRoot = f: (mapAllUsers f) // {
+        root = f "root";
+      };
+    };
+}

machines/stel-xps/default.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, ...}:
+{
+  imports = [ ./printer.nix ];
+
+  variables = {
+    hostName = "stel-xps";
+    graphical = true;
+    git = {
+      key = "0x4998BEEE";
+      gpgsm = true;
+      signDefault = true;
+    };
+  };
+  #networking.hostName = "stel-xps"; # define the hostname
+
+  environment.systemPackages = with pkgs; [
+    brightnessctl
+  ];
+
+    boot.extraModulePackages = [
+    config.boot.kernelPackages.v4l2loopback
+  ];
+
+  boot.kernelModules = [
+      "v4l2loopback"
+  ];
+
+  services.autorandr.enable = true;
+  services.xserver.desktopManager.wallpaper.mode = "fill";
+}

machines/stel-xps/hardware-configuration.nix

@@ -0,0 +1,35 @@
+# 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, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "nvme" "usbhid" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/6b7f9f80-af34-4317-b017-f883a2316674";
+      fsType = "ext4";
+    };
+
+  boot.initrd.luks.devices."crypted".device = "/dev/disk/by-uuid/9c84f143-023d-4fcb-a49c-ca78ce69e0e0";
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/4824-2CFD";
+      fsType = "vfat";
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/93381a25-6704-408e-b091-cfda6cddbda0"; }
+    ];
+
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+  # high-resolution display
+  hardware.video.hidpi.enable = lib.mkDefault true;
+}

machines/stel-xps/printer.nix

@@ -0,0 +1,87 @@
+{ config, pkgs, ...}:
+
+let
+  ppd-local = pkgs.stdenv.mkDerivation rec {
+    pname = "local-ppds";
+    version = "2021-07-04";
+
+    src = ./ppds;
+
+    phases = [ "unpackPhase" "installPhase" ];
+
+    installPhase = ''
+    mkdir -p $out/share/cups/model/
+    cp -R Ricoh $out/share/cups/model
+  '';
+  };
+in
+{
+  services.printing.drivers = with pkgs; [
+    foomatic-filters
+    gutenprint
+    hplip
+  ] ++ [
+    ppd-local
+  ];
+  
+  hardware.printers.ensurePrinters = [
+    {
+      name = "hpm605";
+      location = "APB/3014";
+      description = "HP Laserjet Enterprise M605DN";
+      deviceUri = "hp:/net/HP_LaserJet_M605?hostname=hpm605.tcs.inf.tu-dresden.de";
+      model = "HP/hp-laserjet_m604_m605_m606-ps.ppd.gz";
+      ppdOptions = {
+        Collate = "True";
+        HPOption_Duplexer = "True";
+        HPOption_Tray4 = "HP500SheetInputTray";
+        HPOption_Tray3 = "HP500SheetInputTray";
+        MediaType = "Recycled";
+        Duplex = "DuplexNoTumble";
+      };
+    }
+    {
+      name = "A4";
+      location = "APB/3014";
+      description = "HP Laserjet 9040";
+      deviceUri = "socket://a4.tcs.inf.tu-dresden.de";
+      model = "HP/hp-laserjet_9040-ps.ppd.gz";
+      ppdOptions = {
+        PageSize = "A4";
+        HPOption_Tray1 = "True";
+        HPOption_Duplexer = "True";
+        InstalledMemory = "128-255MB";
+        MediaType = "Plain";
+        Duplex = "DuplexNoTumble";
+        Collate = "True";
+      };
+    }
+    {
+      name = "ricoh";
+      location = "APB/3014";
+      description = "Ricoh SP 4510DN";
+      deviceUri = "socket://ricoh.tcs.inf.tu-dresden.de";
+      model = "Ricoh/ricoh-sp-4510dn.ppd";
+      ppdOptions = {
+        OptionTray = "2Cassette";
+        PageSize = "A4";
+        InputSlot = "3Tray";
+        Duplex = "none";
+        RIPaperPolicy = "NearestSizeAdjust";
+        pdftops-render-default = "pdftocairo";
+      };
+    }
+    {
+      name = "ricohcolor";
+      location = "APB/3014";
+      description = "Ricoh Alficio MP C307";
+      deviceUri = "socket://color.tcs.inf.tu-dresden.de";
+      model = "Ricoh/ricoh-mp-c307.ppd";
+      ppdOptions = {
+        media = "A4";
+        OptionTray = "1Cassette";
+        RIPostScript = "Adobe";
+      };
+    }
+  ];
+}

modules/nix.nix

@@ -0,0 +1,31 @@
+{ pkgs, config, ... }:
+
+{
+  config = {
+    nix = {
+      useSandbox = true;
+      package = pkgs.nixFlakes;
+      generateRegistryFromInputs = true;
+      generateNixPathFromInputs = true;
+      linkInputs = true;
+
+      autoOptimiseStore = true;
+      trustedUsers = [ "root" ] ++ config.elss.users.admins;
+
+      # Enable flakes
+      # Free up to 50 GiB whenever there is less than 10 GiB left.
+      extraOptions = ''
+        experimental-features = nix-command flakes
+        min-free = ${toString (10 * 1024 * 1024 * 1024)}
+        max-free = ${toString (50 * 1024 * 1024 * 1024)}
+      '';
+
+      # Disable automatic (periodic) GC, since it might interfere with benchmarks
+      gc = {
+        automatic = true;
+        dates = "weekly";
+        options = "--delete-older-than 30d";
+      };
+    };
+  };
+}