lsp-lines: add currentLine option

plugins/nvim-lsp/lsp-lines.nix

@@ -8,10 +8,24 @@ in
   options = {
     plugins.lsp-lines = {
       enable = mkEnableOption "lsp_lines.nvim";
+      currentLine = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Show diagnostics only on current line";
+      };
     };
   };
 
   config =
+    let
+      diagnosticConfig = {
+        virtual_text = false;
+        virtual_lines =
+          if cfg.currentLine then {
+            only_current_line = true;
+          } else true;
+      };
+    in
     mkIf cfg.enable {
       extraPlugins = [ pkgs.vimPlugins.lsp_lines-nvim ];
 
@@ -19,9 +33,7 @@ in
         do
           require("lsp_lines").setup()
 
-          vim.diagnostic.config({
-            virtual_text = false
-          })
+          vim.diagnostic.config(${ helpers.toLuaObject diagnosticConfig })
         end
       '';
     };