# nixConfig
This is a modular, flake-based Nix configuration repository for managing all personal machines and environments in one place. It supports:
- Full system configuration for NixOS laptop.
- Home Manager user environments on all machines (NixOS, Ubuntu, WSL, servers).
- Reusable modules for programs and services.
- Declarative configuration and reproducible builds.

## Repository Structure

```shell
nixConfig/
├── flake.nix               # Flake entry point with all system and user configs
├── flake.lock              # Input versions for reproducibility
├── hosts/                  # Per-host system-level configs
│   ├── t440p               # NixOS system config for laptop
│   │    ├── configuration.nix             # NixOS system config
│   │    └── hardware-configuration.nix    # Hardware config generated by NixOS
│   ├── steamdeck           # NixOS system running on Valve Steamdeck
│   ├── xaorus              # home-manager on Ubuntu 
│   └── vps04_08            # services running on Ubuntu VPS
├── home/                   # Home Manager configs (user environments)
│   └── home.nix            # Shared user config for 'wieerwill'
├── modules/                # Shared program/service modules
│   └── ...
```

## Usage
### Rebuild the system
use the systems name at the end. Example:
```bash
sudo nixos-rebuild switch --flake ~/nixConfig#t440p
```

### Rebuild Home Manager only (e.g. on non-NixOS systems)
```bash
home-manager switch --flake ~/nixConfig#<username>@<hostname>
```

### Update flake inputs
```bash
nix flake update
```
or use the scripts in `/scripts`. The script is build for on-system execution and will clean up afterwards:
```bash
chmod +x ./scripts/nix-maintain.sh
./scripts/nix-maintain.sh
```

## Setup

* `/etc/nixos` is a symlink to `~/nixConfig` so NixOS can find configuration files (`sudo ln -s /home/$USER/nixConfig /etc/nixos`).
* Uses matching Home Manager and Nixpkgs versions (`release-25.05`) to avoid compatibility warnings.
* Home Manager is integrated via NixOS modules for system-wide user config.

## Modules

The `home/` and `modules/` directory will contain reusable modules such as:
* `neovim.nix` – editor configuration
* `firefox.nix` – browser preferences
* `git.nix` – shared Git settings
* `traefik.nix` – server services

These modules will be selectively included in each host config or enabled conditionally.

## Secrets & Private Data

Do **not** store secrets or passwords in this repository!
SOPS with age is provided in the configuration as secure method for secrets management.