Please update this doc (tweaks, tricks, or how to setup for another editor)!

Editor Setup Guide

This is the description about how to setup your editor to use nixd.

Installation - get a working executable

Package nixd can be found in nixpkgs.

NixOS Configuration

{ pkgs, ... }: {
  environment.systemPackages = with pkgs; [
    nixd
  ];
}

nix-env(legacy commands)

On NixOS:

nix-env -iA nixos.nixd

On Non NixOS:

nix-env -iA nixpkgs.nixd

nix profile

nix profile install github:nixos/nixpkgs#nixd

And our flake.nix provides a package named nixd with "unstable" experience.

Note that please do NOT override nixpkgs revision for nixd inputs. The source code have tested on specific version on NixOS/nix, which may not work at your version.

Teach your editor find the executable, and setup configurations.

VSCode

https://github.com/nix-community/vscode-nix-ide extension provide a general interface for nixd, and it should work out of box. Please file a bug if you encountered some trouble using the extension.

(Neo)vim

Coc.nvim

According to :help coc-config.txt, coc-settings.json:

{
  "languageserver": {
    "nix": {
      "command": "nixd",
      "filetypes": ["nix"]
    }
  }
}

Neovim

Neovim native LSP and nvim-lspconfig. We are officially supported by nvim-lspconfig, see upstream docs

Emacs

Eglot

The following configuration can be used with the built-in Emacs LSP client: Eglot.

 -lisp
(add-hook 'prog-mode-hook
          (lambda ()
            (add-hook 'before-save-hook 'eglot-format nil t)))
 
(with-eval-after-load 'eglot
  (dolist (mode '((nix-mode . ("nixd"))))
    (add-to-list 'eglot-server-programs mode)))

lsp-mode

A simple Emacs Lisp configuration that adds nixd to LSP Mode in the mean time is as follows:

 -lisp
(with-eval-after-load 'lsp-mode
  (lsp-register-client
    (make-lsp-client :new-connection (lsp-stdio-connection "nixd")
                     :major-modes '(nix-mode)
                     :priority 0
                     :server-id 'nixd)))

Helix

nixd will be supported by default in the next release after 24.07.

languages.toml

[[language]]
name = "nix"
language-servers = ["nixd","nil"]
 
[language-server.nixd]
command = "nixd"

Change the configuration.

Read the configuration docs here.