NixOS Configuration

My personal NixOS configuration for all of my machines.

Note

This configuration is split into two parts:

This repo, the public stuff;
And a private repo, with agenix-encrypted secrets that I don't want to be public.

As a result, you can't just clone this configuration and run it.

You're welcome to use it as a reference for your own configuration, however I can't guarantee this is a perfect example.

There are several related repositories that contain additional customisations:

Checkout the repo on the new machine.
Run the following to switch the machine config to the minimal install and generate SSH host keys:
```
sudo nixos-rebuild switch --flake '.#_install'
```
Backup the generated SSH host keys at /etc/ssh/ssh_host_*.
Run the following and copy the ssh-ed25519 value it outputs. This is the public key for the host:
```
ssh-keyscan localhost
```
Add the public key to the private repository's secrets.nix file, add the system to the appropriate system groupings, and run the following:
```
agenix --rekey
```
Add a new entry to flake.nix with the new machine's name.
Create a new directory under hosts with the same name as you used in the step above.
Run nixos-generate-config --show-hardware-config > hardware-configuration.nix and put hardware-configuration.nix in that directory.
In that directory, create a default.nix and configure it as necessary.
Run the following, where <NEW_HOSTNAME> is the new machine's name. After you've done it the first time, Nix will automatically use that hostname on subsequent rebuilds:
```
sudo nixos-rebuild switch --flake '.#<NEW_HOSTNAME>'
```