Finally added a formatter and LSP for nix

.config/nvim/lua/custom/config/language-servers.lua

@@ -137,4 +137,21 @@ return {
             },
         },
     }, -- zig
+    nixd = {
+        mason = false,
+        cmd = { 'nixd' },
+        settings = {
+            nixd = {
+                nixpkgs = { expr = 'import <nixpkgs> { }' },
+                options = {
+                    nixos = {
+                        expr = '(builtins.getFlake "/home/kyren/dotfiles/flake.nix").nixosConfigurations.laptop-nixos.options',
+                    },
+                    home_manager = {
+                        expr = '(builtins.getFlake "/home/kyren/dotfiles/flake.nix").homeConfigurations.laptop-nixos.options',
+                    },
+                },
+            },
+        },
+    },
 }

.config/nvim/lua/custom/plugins/conform.lua

@@ -3,10 +3,10 @@ return {
     event = { 'BufWritePre' },
     cmd = { 'ConformInfo' },
     keys = {
-        { '<leader>ft', '<cmd>FormatToggle<cr>',  desc = '[F]ormat [T]oggle Globally' },
+        { '<leader>ft', '<cmd>FormatToggle<cr>', desc = '[F]ormat [T]oggle Globally' },
         { '<leader>fT', '<cmd>FormatToggle!<cr>', desc = '[F]ormat [T]oggle Locally' },
-        { '<leader>ff', '<cmd>Format<cr>',        desc = '[F]ormat [F]ile' },
-        { '<leader>f',  '<cmd>Format<cr><esc>',   desc = '[F]ormat',                  mode = 'v' },
+        { '<leader>ff', '<cmd>Format<cr>', desc = '[F]ormat [F]ile' },
+        { '<leader>f', '<cmd>Format<cr><esc>', desc = '[F]ormat', mode = 'v' },
     },
     ---@module "conform"
     ---@type conform.setupOpts
@@ -24,6 +24,8 @@ return {
             ['css'] = { 'prettierd', 'prettier', stop_after_first = true },
             ['javascript'] = { 'prettierd', 'prettier', stop_after_first = true },
             ['typescript'] = { 'prettierd', 'prettier', stop_after_first = true },
+            -- ['nix'] = { 'nixfmt' },
+            -- ['nix'] = { 'alejandra' },
         },
         format_on_save = function(bufnr)
             -- Disable with a global or buffer local variable

hosts/laptop-nixos/home.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, inputs, ... }:
 
 {
   home.username = "kyren";
@@ -78,8 +78,13 @@
     gitleaks
     rar
     gomodifytags
+    nixfmt-rfc-style
+    alejandra
+    nixd
   ];
 
+  nix.nixPath = ["nixpkgs=${inputs.nixpkgs}"];
+
   # Home Manager is pretty good at managing dotfiles. The primary way to manage
   # plain files is through 'home.file'.
   home.file = {
@@ -114,7 +119,6 @@
     };
   };
 
-
   # Let Home Manager install and manage itself.
   programs.home-manager.enable = true;
 }