extract gnome into module

nixos/common/modules/gnome/dconf.nix

@@ -0,0 +1,88 @@
+{ lib, ... }:
+
+with lib.hm.gvariant;
+let
+  inherit (builtins) attrNames map;
+  inherit (lib.attrsets) mapAttrs' nameValuePair;
+  generate_custom_keybindings = binds:
+    {
+      "org/gnome/settings-daemon/plugins/media-keys" = {
+        custom-keybindings = map (name:
+          "/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/${name}/")
+          (attrNames binds);
+      };
+    } // mapAttrs' (name:
+      nameValuePair
+      "org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/${name}")
+    binds;
+in {
+  dconf.settings = {
+    "org/gnome/desktop/input-sources" = {
+      sources = [ (mkTuple [ "xkb" "us+altgr-intl" ]) ];
+      xkb-options = [ "terminate:ctrl_alt_bksp" ];
+    };
+
+    "org/gnome/desktop/peripherals/touchpad" = {
+      tap-to-click = true;
+      two-finger-scrolling-enabled = true;
+    };
+
+    "org/gnome/mutter" = {
+      attach-modal-dialogs = true;
+      dynamic-workspaces = false;
+      edge-tiling = true;
+      focus-change-on-pointer-rest = true;
+      workspaces-only-on-primary = true;
+    };
+
+    "org/gnome/mutter/keybindings" = {
+      toggle-tiled-left = [ "<Super>bracketleft" ];
+      toggle-tiled-right = [ "<Super>bracketright" ];
+    };
+
+    "org/gnome/shell/keybindings" = { toggle-overview = [ "<Super>d" ]; };
+
+    "org/gnome/desktop/interface" = { color-scheme = "prefer-dark"; };
+
+    "org/gnome/desktop/wm/preferences" = {
+      auto-raise = false;
+      num-workspaces = 6;
+      focus-mode = "sloppy";
+    };
+
+    "org/gnome/desktop/wm/keybindings" = {
+      raise-or-lower = [ "<Super>s" ];
+      switch-applications = [ "<Super>Tab" ];
+      switch-applications-backward = [ "<Super>Tab" ];
+      move-to-workspace-1 = [ "<Shift><Super>exclam" ];
+      move-to-workspace-2 = [ "<Shift><Super>at" ];
+      move-to-workspace-3 = [ "<Shift><Super>numbersign" ];
+      move-to-workspace-4 = [ "<Shift><Super>dollar" ];
+      move-to-workspace-5 = [ "<Shift><Super>percent" ];
+      move-to-workspace-6 = [ "<Shift><Super>asciicircum" ];
+      switch-to-workspace-1 = [ "<Super>1" ];
+      switch-to-workspace-2 = [ "<Super>2" ];
+      switch-to-workspace-3 = [ "<Super>3" ];
+      switch-to-workspace-4 = [ "<Super>4" ];
+      switch-to-workspace-5 = [ "<Super>5" ];
+      switch-to-workspace-6 = [ "<Super>6" ];
+      toggle-fullscreen = [ "<Super><Shift>M" ];
+      toggle-maximized = [ "<Super>m" ];
+    };
+
+    "org/gnome/tweaks" = { show-extensions-notice = false; };
+
+    "org/gnome/boxes" = { first-run = false; };
+  } // generate_custom_keybindings {
+    "terminal" = {
+      binding = "<Super>Return";
+      command = "kgx";
+      name = "Open Terminal";
+    };
+    "firefox" = {
+      binding = "<Super>f";
+      command = "firefox";
+      name = "Open Firefox";
+    };
+  };
+}

nixos/common/modules/gnome/default.nix

@@ -0,0 +1,59 @@
+{ config, pkgs, lib, flat_hosts, ... }:
+with lib;
+let cfg = config.services.v.gnome;
+
+in {
+  options.services.v.gnome = { enable = mkEnableOption "v.gnome"; };
+
+  config = mkIf cfg.enable {
+    services.xserver.enable = true;
+    services.xserver.excludePackages = [ pkgs.xterm ];
+
+    home-manager.sharedModules = [
+      ./dconf.nix
+    ];
+
+    # Configure keymap in X11
+    services.xserver = {
+      layout = "us";
+      xkbVariant = "altgr-intl";
+    };
+
+    # Enable the GNOME Desktop Environment.
+    services.xserver.displayManager.gdm.enable = true;
+    services.xserver.desktopManager.gnome.enable = true;
+    services.udev.packages = with pkgs; [ gnome.gnome-settings-daemon ];
+    environment.gnome.excludePackages =
+      (with pkgs; [ gnome-photos gnome-tour gnome-connections ])
+      ++ (with pkgs.gnome; [
+        atomix # puzzle game
+        epiphany # web browser
+        geary # email reader
+        gedit # text editor
+        gnome-calendar
+        gnome-clocks
+        gnome-contacts
+        gnome-maps
+        gnome-music
+        gnome-notes
+        gnome-terminal
+        gnome-weather
+        hitori # sudoku game
+        iagno # go game
+        simple-scan # document scanner
+        tali # poker game
+        totem # video player
+      ]);
+
+    # Services required for gnome
+    programs.dconf.enable = true;
+    services.dbus.enable = true;
+    services.udisks2.enable = true;
+
+    # Extra gnome packages
+    environment.systemPackages = with pkgs; [
+      gnome.gnome-tweaks
+      gnome.gnome-boxes
+    ];
+  };
+}