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nix + neovim = ???
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nix + neovim = ???

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kickstart-nix.nvim














❄️




A dead simple Nix flake template repository
for Neovim


[![Neovim][neovim-shield]][neovim-url]
[![Nix][nix-shield]][nix-url]
[![Lua][lua-shield]][lua-url]

[![GPL2 License][license-shield]][license-url]
[![Issues][issues-shield]][issues-url]

![](https://github.com/mrcjkb/kickstart-nix.nvim/assets/12857160/84faa268-82de-4401-acf3-efddc26dd58a)

If Nix and Neovim have one thing in common, it's that many new users don't know where to get started. Most Nix-based Neovim setups assume deep expertise in both realms, abstracting away Neovim's core functionalities as well as the Nix internals used to build a Neovim config. `kickstart-nix.nvim` is different: It's geared for users of all levels, making the migration of Neovim configurations to Nix straightforward.

> [!NOTE]
>
> Similar to [`kickstart.nvim`](https://github.com/nvim-lua/kickstart.nvim),
> this repository is meant to be used by **you** to begin your
> **Nix**/Neovim journey; remove the things you don't use and add what you miss.

## Quick Links

- [Test drive](#test-drive)
- [Usage](#usage)
- [Installation](#installation)
- [Philosophy](#philosophy)
- [Design](#design)
- [Pre-configured plugins](#pre-configured-plugins)
- [Syncing updates](#syncing-updates)
- [Alternative / similar projects](#alternative--similar-projects)

## Test drive

If you have Nix installed (with [flakes](https://nixos.wiki/wiki/Flakes) enabled),
you can test drive this by running:

```console
nix run "github:mrcjkb/kickstart-nix.nvim"
```

## Usage

1. Click on [Use this template](https://github.com/mrcjkb/kickstart-nix.nvim/generate)
to start a repo based on this template. **Do _not_ fork it**.
1. Add/remove plugins to/from the [Neovim overlay](./nix/neovim-overlay.nix).
1. Add/remove plugin configs to/from the `nvim/plugin` directory.
1. Modify as you wish (you will probably want to add a color theme, ...).
See: [Design](#design).

## Installation

### NixOS (with flakes)

1. Add your flake to you NixOS flake inputs.
1. Add the overlay provided by this flake.

```nix
nixpkgs.overlays = [
# replace with the name you chose
.overlays.default
];
```

You can then add the overlay's output(s) to the `systemPackages`:

```nix
environment.systemPackages = with pkgs; [
nvim-pkg # The default package added by the overlay
];
```

### Non-NixOS

With Nix installed (flakes enabled), from the repo root:

```console
nix profile install .#nvim
```

## Philosophy

- KISS principle with sane defaults.
- Manage plugins + external dependencies using Nix
(managing plugins shouldn't be the responsibility of a plugin).
- Configuration entirely in Lua[^1] (Vimscript is also possible).
This makes it easy to migrate from non-nix dotfiles.
- Usable on any device with Neovim and Nix installed.
- Ability to create multiple derivations with different sets of plugins.
- Use either nixpkgs or flake inputs as plugin source.
- Use Neovim's built-in loading mechanisms.
- See [`:h initializaion`](https://neovim.io/doc/user/starting.html#initialization)
and [`:h runtimepath`](https://neovim.io/doc/user/options.html#'runtimepath').
- Use Neovim's built-in LSP client.

[^1]: The absence of a Nix module DSL for Neovim configuration is deliberate.
If you were to copy the `nvim` directory to `$XDG_CONFIG_HOME`,
and install the plugins, it would work out of the box.

## Design

Directory structure:

```sh
── flake.nix
── nvim # Neovim configs (lua), equivalent to ~/.config/nvim
── nix # Nix configs
```

### Neovim configs

- Set options in `init.lua`.
- Source autocommands, user commands, keymaps,
and configure plugins in individual files within the `plugin` directory.
- Filetype-specific scripts (e.g. start LSP clients) in the `ftplugin` directory.
- Library modules in the `lua/user` directory.

Directory structure:

```sh
── nvim
├── ftplugin # Sourced when opening a file type
│ └── .lua
├── init.lua # Always sourced
├── lua # Shared library modules
│ └── user
│ └── .lua
├── plugin # Automatically sourced at startup
│ ├── autocommands.lua
│ ├── commands.lua
│ ├── keymaps.lua
│ ├── plugins.lua # Plugins that require a `setup` call
│ └── .lua # Plugin configurations
└── after # Empty in this template
├── plugin # Sourced at the very end of startup (rarely needed)
└── ftplugin # Sourced when opening a filetype, after sourcing ftplugin scripts
```

> [!IMPORTANT]
>
> - Configuration variables (e.g. `vim.g.`) should go in `nvim/init.lua`
> or a module that is `require`d in `init.lua`.
> - Configurations for plugins that require explicit initialization
> (e.g. via a call to a `setup()` function) should go in `nvim/plugin/.lua`
> or `nvim/plugin/plugins.lua`.
> - See [Initialization order](#initialization-order) for details.

### Nix

You can declare Neovim derivations in `nix/neovim-overlay.nix`.

There are two ways to add plugins:

- The traditional way, using `nixpkgs` as the source.
- By adding plugins as flake inputs (if you like living on the bleeding-edge).
Plugins added as flake inputs must be built in `nix/plugin-overlay.nix`.

Directory structure:

```sh
── flake.nix
── nix
├── mkNeovim.nix # Function for creating the Neovim derivation
└── neovim-overlay.nix # Overlay that adds Neovim derivation
```

### Initialization order

This derivation creates an `init.lua` as follows:

1. Add `nvim/lua` to the `runtimepath`.
1. Add the content of `nvim/init.lua`.
1. Add `nvim/*` to the `runtimepath`.
1. Add `nvim/after` to the `runtimepath`.

This means that modules in `nvim/lua` can be `require`d in `init.lua` and `nvim/*/*.lua`.

Modules in `nvim/plugin/` are sourced automatically, as if they were plugins.
Because they are added to the runtime path at the end of the resulting `init.lua`,
Neovim sources them _after_ loading plugins.

## Pre-configured plugins

This configuration comes with [a few plugins pre-configured](./nix/neovim-overlay.nix).

You can add or remove plugins by

- Adding/Removing them in the [Nix list](./nix/neovim-overlay.nix).
- Adding/Removing the config in `nvim/plugin/.lua`.

## Syncing updates

If you have used this template and would like to fetch updates
that were added later...

Add this template as a remote:

```console
git remote add upstream git@github.com:mrcjkb/kickstart-nix.nvim.git
```

Fetch and merge changes:

```console
git fetch upstream
git merge upstream/main --allow-unrelated-histories
```

## Alternative / similar projects

- [`kickstart.nvim`](https://github.com/nvim-lua/kickstart.nvim):
Single-file Neovim configuration template with a similar philosophy to this project.
Does not use Nix to manage plugins.
- [`neovim-flake`](https://github.com/jordanisaacs/neovim-flake):
Configured using a Nix module DSL.
- [`NixVim`](https://github.com/nix-community/nixvim):
A Neovim distribution configured using a NixOS module.
- [`nixCats-nvim`](https://github.com/BirdeeHub/nixCats-nvim):
A project that organises plugins into categories.
It also separates lua and nix configuration.
- [`lazy-nix-helper.nvim`](https://github.com/b-src/lazy-nix-helper.nvim):
For lazy.nvim users who would like to manage plugins with Nix,
but load them with lazy.nvim.

> [!NOTE]
>
> When comparing with projects in the "non-Nix world", this
> repository would be more comparable to `kickstart.nvim` (hence the name),
> while the philosophies of `neovim-flake` and `NixVim` are more in line with
> a Neovim distribution like [`LunarVim`](https://www.lunarvim.org/)
> or [`LazyVim`](https://www.lazyvim.org/)
> (though they are more minimal by default).

[neovim-shield]: https://img.shields.io/badge/NeoVim-%2357A143.svg?&style=for-the-badge&logo=neovim&logoColor=white
[neovim-url]: https://neovim.io/
[nix-shield]: https://img.shields.io/badge/nix-0175C2?style=for-the-badge&logo=NixOS&logoColor=white
[nix-url]: https://nixos.org/
[lua-shield]: https://img.shields.io/badge/lua-%232C2D72.svg?style=for-the-badge&logo=lua&logoColor=white
[lua-url]: https://www.lua.org/
[license-shield]: https://img.shields.io/github/license/mrcjkb/kickstart-nix.nvim.svg?style=for-the-badge
[license-url]: https://github.com/mrcjkb/kickstart-nix.nvim/blob/master/LICENSE
[issues-shield]: https://img.shields.io/github/issues/mrcjkb/kickstart-nix.nvim.svg?style=for-the-badge
[issues-url]: https://github.com/mrcjkb/kickstart-nix.nvim/issues
[license-shield]: https://img.shields.io/github/license/mrcjkb/kickstart-nix.nvim.svg?style=for-the-badge
[license-url]: https://github.com/mrcjkb/kickstart-nix.nvim/blob/master/LICENSE