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229 lines
6.7 KiB
Markdown
229 lines
6.7 KiB
Markdown
[<img src="https://daiderd.com/nix-darwin/images/nix-darwin.png" width="200px" alt="logo" />](https://github.com/LnL7/nix-darwin)
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# nix-darwin
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[](https://github.com/LnL7/nix-darwin/actions/workflows/test.yml)
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Nix modules for darwin, `/etc/nixos/configuration.nix` for macOS.
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This project aims to bring the convenience of a declarative system approach to macOS.
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nix-darwin is built up around [Nixpkgs](https://github.com/NixOS/nixpkgs), quite similar to [NixOS](https://nixos.org/).
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## Prerequisites
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The only prerequisite is a Nix implementation, both Nix and Lix are supported.
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As the official Nix installer does not include an automated uninstaller, and manual uninstallation on macOS is a complex process, we recommend using one of the following installers instead:
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- The [Nix installer from Determinate Systems](https://github.com/DeterminateSystems/nix-installer?tab=readme-ov-file#determinate-nix-installer) is only recommended for use with flake-based setups. **Make sure you use it without the `--determinate` flag**. The `--determinate` flag installs the Determinate Nix distribution which does not work out of the box with nix-darwin.
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* The [Lix installer](https://lix.systems/install/#on-any-other-linuxmacos-system) supports both flake-based and channel-based setups.
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## Installing
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If you wish to use nix-darwin with flakes, please refer to the [flakes](#flakes) section.
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```bash
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nix-build https://github.com/LnL7/nix-darwin/archive/master.tar.gz -A installer
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./result/bin/darwin-installer
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```
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## Updating
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The installer will configure a channel for this repository.
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```bash
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nix-channel --update darwin
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darwin-rebuild changelog
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```
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> NOTE: If you are using Nix as a daemon service the channel for that will be owned by root.
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> Use `sudo -i nix-channel --update darwin` instead.
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## Uninstalling
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To run the latest version of the uninstaller, you can run the following command:
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```
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nix --extra-experimental-features "nix-command flakes" run nix-darwin#darwin-uninstaller
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```
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If that command doesn't work for you, you can try the locally installed uninstaller:
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```
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darwin-uninstaller
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```
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## Example configuration
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Configuration lives in `~/.nixpkgs/darwin-configuration.nix`. Check out
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[modules/examples](https://github.com/LnL7/nix-darwin/tree/master/modules/examples) for some example configurations.
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```nix
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{ pkgs, ... }:
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{
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# List packages installed in system profile. To search by name, run:
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# $ nix-env -qaP | grep wget
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environment.systemPackages =
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[ pkgs.vim
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];
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}
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```
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## Flakes
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nix-darwin aims for both non-flake and flake configurations to be well supported despite flakes being an experimental feature in Nix.
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### Step 1. Creating `flake.nix`
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<details>
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<summary>Getting started from scratch</summary>
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<p></p>
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If you don't have an existing `configuration.nix`, you can run the following commands to generate a basic `flake.nix` inside `~/.config/nix-darwin`:
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```bash
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mkdir -p ~/.config/nix-darwin
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cd ~/.config/nix-darwin
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nix flake init -t nix-darwin
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sed -i '' "s/simple/$(scutil --get LocalHostName)/" flake.nix
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```
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Make sure to change `nixpkgs.hostPlatform` to `aarch64-darwin` if you are using Apple Silicon.
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</details>
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<details>
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<summary>Migrating from an existing configuration.nix</summary>
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<p></p>
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Add the following to `flake.nix` in the same folder as `configuration.nix`:
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```nix
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{
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description = "John's darwin system";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-24.05-darwin";
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nix-darwin.url = "github:LnL7/nix-darwin";
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nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
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};
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outputs = inputs@{ self, nix-darwin, nixpkgs }: {
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darwinConfigurations."Johns-MacBook" = nix-darwin.lib.darwinSystem {
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modules = [ ./configuration.nix ];
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};
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};
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}
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```
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Make sure to replace `Johns-MacBook` with your hostname which you can find by running `scutil --get LocalHostName`.
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Make sure to set `nixpkgs.hostPlatform` in your `configuration.nix` to either `x86_64-darwin` (Intel) or `aarch64-darwin` (Apple Silicon).
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</details>
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### Step 2. Installing `nix-darwin`
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Instead of using `darwin-installer`, you can just run `darwin-rebuild switch` to install nix-darwin. As `darwin-rebuild` won't be installed in your `PATH` yet, you can use the following command:
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```bash
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nix run nix-darwin -- switch --flake ~/.config/nix-darwin
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```
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### Step 3. Using `nix-darwin`
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After installing, you can run `darwin-rebuild` to apply changes to your system:
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```bash
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darwin-rebuild switch --flake ~/.config/nix-darwin
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```
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#### Using flake inputs
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Inputs from the flake can also be passed into `darwinSystem`. These inputs are then
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accessible as an argument `inputs`, similar to `pkgs` and `lib`, inside the configuration.
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```nix
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# in flake.nix
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nix-darwin.lib.darwinSystem {
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modules = [ ./configuration.nix ];
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specialArgs = { inherit inputs; };
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}
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```
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```nix
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# in configuration.nix
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{ pkgs, lib, inputs }:
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# inputs.self, inputs.nix-darwin, and inputs.nixpkgs can be accessed here
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```
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## Documentation
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Reference documentation of all the options is available [here](https://daiderd.com/nix-darwin/manual/index.html).
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This can also be accessed locally using `man 5 configuration.nix`.
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`darwin-help` will open a HTML version of the manpage in the default browser.
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Furthermore there's `darwin-option` to introspect the settings of a system and its available options.
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> NOTE: `darwin-option` is only available to non-flake installations.
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```
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$ darwin-option nix.linux-builder.enable
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Value:
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true
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Default:
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false
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Example:
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true
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Description:
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Whether to enable Linux builder.
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```
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There's also a small wiki https://github.com/LnL7/nix-darwin/wiki about
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specific topics, like macOS upgrades.
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## Tests
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There are basic tests that run sanity checks for some of the modules,
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you can run them like this:
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```bash
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# run all tests
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nix-build release.nix -A tests
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# or just a subset
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nix-build release.nix -A tests.environment-path
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```
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## Contributing
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Let's make Nix on macOS awesome!
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Don't hesitate to contribute modules or open an issue.
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To build your configuration with local changes you can run this. This
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flag can also be used to override darwin-config or nixpkgs, for more
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information on the `-I` flag look at the nix-build [manpage](https://nixos.org/manual/nix/stable/command-ref/nix-build.html).
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```bash
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darwin-rebuild switch -I darwin=.
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```
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If you're adding a module, please add yourself to `meta.maintainers`, for example
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```nix
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meta.maintainers = [
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lib.maintainers.alice or "alice"
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];
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options.services.alicebot = # ...
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```
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The `or` operator takes care of graceful degradation when `lib` from Nixpkgs
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goes out of sync.
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Also feel free to contact me if you have questions,
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- Matrix - @daiderd:matrix.org, you can find me in [#macos:nixos.org](https://matrix.to/#/#macos:nixos.org)
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- @LnL7 on twitter
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