# Nix

My grand, declarative, and unified application, service, environment, and
machine configuration, secret, and package management in a single flake. ❤️ ❄️

**NOTE**: Everything in here is highly specific to my personal preference. I
can't recommend you actually use this in any way, but hopefully some stuff in
here is useful inspiration.

# Quick Start

You don't have even have to clone this crap yourself. How cool is that!

But if you're gonna change stuff you had better setup the pre-commit hook:

```shell_session
ln -s $PWD/pre-commit.bash .git/hooks/pre-commit
```

## NixOS

```shell_session
nixos-rebuild --flake git+https://git.lyte.dev/lytedev/nix switch
```

## Not NixOS

```shell_session
$ curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
$ nix profile install github:nix-community/home-manager
$ home-manager switch --flake git+https://git.lyte.dev/lytedev/nix
```

# Advanced Usage

## Push NixOS Config

```bash
nix run nixpkgs#nixos-rebuild -- --flake 'git+https://git.lyte.dev/lytedev/nix#host' \
  --target-host root@host --build-host root@host \
  switch --show-trace
```

<!-- TODO: how to do this with rollbacks if I don't confirm things? -->

## Provisioning New NixOS Hosts

```bash
# establish network access
# plug in ethernet or do the wpa_cli song and dance for wifi
wpa_cli scan
wpa_cli scan_results
wpa_cli add_network 0
wpa_cli set_network 0 ssid "MY_SSID"
wpa_cli set_network 0 psk "MY_WIFI_PASSWORD"
wpa_cli enable_network 0
wpa_cli save_config

# partition disks
nix-shell --packages git --run "sudo nix run \
  --extra-experimental-features nix-command \
  --extra-experimental-features flakes \
  github:nix-community/disko -- \
    --flake 'git+https://git.lyte.dev/lytedev/nix#${PARTITION_SCHEME}' \
    --mode disko \
    --arg disks '[ \"/dev/${DISK}\" ]'"

# install
nix-shell --packages git \
  --run "sudo nixos-install \
    --flake 'git+https://git.lyte.dev/lytedev/nix#${FLAKE_ATTR}' \
    --option substituters 'https://nix.h.lyte.dev' \
    --option trusted-public-keys 'h.lyte.dev:HeVWtne31ZG8iMf+c15VY3/Mky/4ufXlfTpT8+4Xbs0='"
```

# To Do

- Port configuration (lytedev/dotfiles) to home manager where applicable?
  - Sway, Kitty, and Helix, come to mind
- Installation from a live ISO does not fully work yet
- I don't understand Nix well enough to know why stuff is being compiled even when I have a binary cache
  - Maybe it detects different CPUs and will recompile certain packages for per-CPU optimizations?
    - How does this factor in with "pureness"?
- Custom pre-configured live ISO
- Unify standalone home manager module with NixOS home manager module
- Pre-commit checks with stuff like `nix flake check` and formatting checkers