From 9dbfef79b78a7fc9a02294c7ca6d0938186d205a Mon Sep 17 00:00:00 2001
From: Mora Unie Youer <mora_unie_youer@riseup.net>
Date: Thu, 6 Mar 2025 21:06:39 +0300
Subject: feat: add `nixd` language server

---
 flake.nix          | 15 +++++----------
 lsp/nixd.lua       | 21 +++++++++++++++++++++
 lua/config/lsp.lua |  1 +
 3 files changed, 27 insertions(+), 10 deletions(-)
 create mode 100644 lsp/nixd.lua

diff --git a/flake.nix b/flake.nix
index 9d55717..7aaaf67 100644
--- a/flake.nix
+++ b/flake.nix
@@ -103,6 +103,7 @@
       lspsAndRuntimeDeps = {
         general = with pkgs; {
           lua = [ lua-language-server ];
+          nix = [ nix-doc nixd ];
         };
       };
 
@@ -210,6 +211,7 @@
           aliases = [ "vim" ];
           neovim-unwrapped = inputs.neovim-nightly-overlay.packages.${pkgs.system}.neovim;
         };
+
         # and a set of categories that you want
         # (and other information to pass to lua)
         categories = {
@@ -219,17 +221,10 @@
           general = true;
           gitPlugins = true;
           customPlugins = true;
+        };
 
-          test = true;
-          example = {
-            youCan = "add more than just booleans";
-            toThisSet = [
-              "and the contents of this categories set"
-              "will be accessible to your lua with"
-              "nixCats('path.to.value')"
-              "see :help nixCats"
-            ];
-          };
+        extra = {
+          nixdExtras = { inherit nixpkgs; };
         };
       };
     };
diff --git a/lsp/nixd.lua b/lsp/nixd.lua
new file mode 100644
index 0000000..3e899c3
--- /dev/null
+++ b/lsp/nixd.lua
@@ -0,0 +1,21 @@
+return {
+  cmd = { "nixd" },
+  filetypes = { "nix" },
+
+  settings = {
+    nixd = {
+      nixpkgs = {
+        expr = [[import (builtins.getFlake "]] .. nixCats.extra("nixdExtras.nixpkgs") .. [[") { }   ]],
+      },
+
+      formatting = {
+        command = { "nixfmt" },
+      },
+
+      options = {
+        nixos = { expr = nixCats.extra("nixdExtras.nixos_options") },
+        ["home-manager"] = { expr = nixCats.extra("nixdExtras.home_manager_options") },
+      },
+    },
+  },
+}
diff --git a/lua/config/lsp.lua b/lua/config/lsp.lua
index c8444ef..37e3b6f 100644
--- a/lua/config/lsp.lua
+++ b/lua/config/lsp.lua
@@ -1 +1,2 @@
 vim.lsp.enable("lua-language-server")
+vim.lsp.enable("nixd")
-- 
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