[emacs] Modularize more and better pkg

Attempts to select the right emacs package based on whether the machine
is x11 only or not.

flake.nix

@@ -11,7 +11,7 @@
   };
 
   outputs = { self, nixpkgs, ... } @ inputs: {
-    nixosConfigurations.z790prors-nix = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.z790prors-nix = nixpkgs.lib.nixosSystem rec {
       system = "x86_64-linux";
       modules = [
         ./roles
@@ -20,13 +20,15 @@
         {
           home-manager.useGlobalPkgs = true;
           home-manager.useUserPackages = true;
-          home-manager.extraSpecialArgs = { inherit inputs; };
           home-manager.users.johno = import ./home/home-z790prors.nix;
+          home-manager.extraSpecialArgs = {
+            customPkgs = nixpkgs.legacyPackages."${system}".callPackage ./packages {};
+          };
         }
       ];
     };
 
-    nixosConfigurations.nix-book = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.nix-book = nixpkgs.lib.nixosSystem rec {
       system = "x86_64-linux";
       modules = [
         ./roles
@@ -35,13 +37,15 @@
         {
           home-manager.useGlobalPkgs = true;
           home-manager.useUserPackages = true;
-          home-manager.extraSpecialArgs = { inherit inputs; };
           home-manager.users.johno = import ./home/home-nix-book.nix;
+          home-manager.extraSpecialArgs = {
+            customPkgs = nixpkgs.legacyPackages."${system}".callPackage ./packages {};
+          };
         }
       ];
     };
 
-    nixosConfigurations.boxy = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.boxy = nixpkgs.lib.nixosSystem rec {
       system = "x86_64-linux";
       modules = [
         ./roles
@@ -50,8 +54,10 @@
         {
           home-manager.useGlobalPkgs = true;
           home-manager.useUserPackages = true;
-          home-manager.extraSpecialArgs = { inherit inputs; };
           home-manager.users.johno = import ./home/home-default.nix;
+          home-manager.extraSpecialArgs = {
+            customPkgs = nixpkgs.legacyPackages."${system}".callPackage ./packages {};
+          };
         }
       ];
     };

home/home-default.nix

@@ -1,8 +1,5 @@
-{ pkgs, ... }:
+{ pkgs, customPkgs, ... }:
 
-let
-  nextcloudTalkDesktop = pkgs.callPackage ./modules/nextcloud-talk-desktop/package.nix {};
-in
 {
   # Home Manager needs a bit of information about you and the paths it should
   # manage.
@@ -62,7 +59,7 @@ in
     pkgs.wofi
     pkgs.vlc
 
-    nextcloudTalkDesktop
+    customPkgs.nextcloudTalkDesktop
   ];
 
   # Home Manager is pretty good at managing dotfiles. The primary way to manage

home/modules/emacs/default.nix

@@ -1,14 +1,16 @@
 { config, lib, pkgs, ... }:
 
+with lib;
+
 let
-  emacs = pkgs.emacs29;
   doomSync = (let
     git = pkgs.git;
   in ''
-    export PATH=${emacs}/bin:${git}/bin:$PATH
+    export PATH=${pkgs.emacs}/bin:${git}/bin:$PATH
     ${config.xdg.configHome}/emacs/bin/doom sync -u -j $((`nproc`/4*3))
   '');
 in {
+  config = {
     home.packages = [
       pkgs.emacs-all-the-icons-fonts
       pkgs.fontconfig
@@ -56,14 +58,10 @@ in {
       "${config.xdg.configHome}/emacs/bin"
     ];
 
-  programs.emacs = {
-    enable = true;
-    package = emacs;
-  };
-
     xdg.configFile."doom" = {
       source = ./doom;
       # Sync doom if we updated the config
       onChange = doomSync;
     };
+  };
 }

packages/default.nix

@@ -0,0 +1,4 @@
+{ pkgs, ... }:
+{
+  nextcloudTalkDesktop = pkgs.callPackage ./nextcloud-talk-desktop {};
+}

roles/desktop/default.nix

@@ -4,6 +4,29 @@ with lib;
 
 let
   cfg = config.roles.desktop;
+
+  basePackages = with pkgs; [
+
+  ];
+
+  x11BasePackages = with pkgs; [
+
+  ];
+
+  x11OnlyPackages = with pkgs; [
+    emacs
+  ];
+
+  waylandBasePackages = with pkgs; [
+    grim
+    slurp
+    wl-clipboard
+    mako
+  ];
+
+  waylandOnlyPackages = with pkgs; [
+    emacs-gtk
+  ];
 in
 {
   options.roles.desktop = {
@@ -40,12 +63,6 @@ in
       programs.dconf.enable = true;
       services.gnome.gnome-keyring.enable = true;
 
-      environment.systemPackages = with pkgs; mkIf (!cfg.x11Only) [
-        grim
-        slurp
-        wl-clipboard
-        mako
-      ];
       programs.sway = mkIf (!cfg.x11Only) {
         enable = true;
         wrapperFeatures.gtk = true;
@@ -73,6 +90,15 @@ in
 
       virtualisation.docker.enable = true;
       users.extraGroups.docker.members = [ "johno" ];
+
+      environment.systemPackages = with pkgs; mkMerge [
+        basePackages
+        x11BasePackages
+        (mkIf cfg.x11Only x11OnlyPackages)
+        # TODO: Do we need a "wayland only" mode?
+        (mkIf (!cfg.x11Only) waylandBasePackages)
+        (mkIf (!cfg.x11Only) waylandOnlyPackages)
+      ];
     };
 
 }