[emacs] Use external module for doom config

home/modules/emacs/default.nix

@@ -2,14 +2,7 @@
 
 with lib;
 
-let
-  doomSync = (let
-    git = pkgs.git;
-  in ''
-    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
@@ -26,43 +19,15 @@ in {
       pkgs.python3
     ];
 
+    programs.doom-emacs = {
+      enable = true;
+      doomDir = ./doom;
+    };
+
     fonts.fontconfig.enable = true;
 
-    home.file = {
-      ".config/emacs" = {
-        source = fetchGit {
-          url = "https://github.com/doomemacs/doomemacs.git";
-          # When updating me, remember to run `doom sync`
-          rev = "f425f2ff3da584cfe2676f6b9cf1d81a690a75e5";
-        };
-        # We need to use recursive mode here or else doom fails to sync for
-        # some reason related to the permissions on the synced path. I'm not
-        # quite sure of everything that's going on here.
-        recursive = true;
-
-        # Because `recursive = true` will cause this to sync every single
-        # activation, we turn this off here.
-        #
-        # There's probably a way we could do better detection of this within
-        # our onChange shell?
-        #
-        # onChange = doomSync;
-      };
-    };
-
     home.sessionVariables = {
-      DOOMLOCALDIR = "${config.xdg.dataHome}/doom";
       EDITOR = "emacs -nw";
     };
-
-    home.sessionPath = [
-      "${config.xdg.configHome}/emacs/bin"
-    ];
-
-    xdg.configFile."doom" = {
-      source = ./doom;
-      # Sync doom if we updated the config
-      onChange = doomSync;
-    };
   };
 }