neovim: Add module for diagram-nvim

neovim/default.nix

@@ -14,6 +14,7 @@
 
     ./plugins/headerguard.nix
     ./plugins/lsp-signature.nix
+    ./plugins/diagram-nvim.nix
   ];
 
   colorschemes.tokyonight = {

neovim/notes.nix

@@ -45,18 +45,18 @@
     };
   };
 
-  extraConfigLua =
-    let
-      cfg.renderer_options = {
+  plugins.diagram-nvim = {
+    enable = true;
+
+    settings = {
+      renderer_options = {
         mermaid = {
           background = "transparent";
           theme = "dark";
         };
       };
-    in
-    ''
-      require('diagram').setup(${helpers.toLuaObject cfg})
-    '';
+    };
+  };
 
   extraPackages = with pkgs; [
     mermaid-cli

neovim/plugins/diagram-nvim.nix

@@ -0,0 +1,15 @@
+{
+  lib,
+  helpers,
+  config,
+  pkgs,
+  ...
+}:
+helpers.neovim-plugin.mkNeovimPlugin config {
+  name = "diagram-nvim";
+  originalName = "diagram.nvim";
+  luaName = "diagram";
+  defaultPackage = pkgs.vimPlugins.diagram-nvim;
+
+  maintainers = [ lib.maintainers.traxys ];
+}