# Nix Configuration

This repository is home to the nix code that builds my systems.

## Screenshots

![](./_img/screenshot_2023-05-07-21-21.webp)

## TODO

- enable disk encryption to enhance data security
- make fcitx5-rime work in vscode/chrome/telegram on wayland
- auto-unlock with `ssh-agent` after login
  - [People using ssh-agent, how do you unlock it on login? - reddit](https://www.reddit.com/r/NixOS/comments/lsbo9a/people_using_sshagent_how_do_you_unlock_it_on/)
- update scripts for i3wm, especially rofi & screenshot
- fix `xdg-open`: after set `firefox.desktop` as defaultApplication, NixOS returned error `no apps installed that can open "https://baidu.com"`
- `Xcursor.size` does not take effect in i3

## Why Nix?

Nix allows for easy-to-manage, collaborative, reproducible deployments. This means that once something is setup and configured once, it works forever. If someone else shares their configuration, anyone can make use of it.

**Want to know Nix in details? Looking for a beginner-friendly tutorial? Check out [NixOS & Nix Flakes - A Guide for Beginners](https://thiscute.world/en/posts/nixos-and-flake-basics/)!**

## Hosts

```shell
› tree hosts
hosts
├── harmonica  # my MacBook Pro 2020 13-inch, mainly for business.
└── idols
    ├── ai         # my main computer, with NixOS + I5-13600KF + RTX 4090 GPU, for gaming & daily use.
    ├── aquamarine # my NixOS virtual machine with R9-5900HX(8C16T), mainly for distributed building & testing.
    ├── kana       # yet another NixOS vm on another physical machine with R5-5625U(6C12T).
    └── ruby       # another NixOS vm on another physical machine with R7-5825U(8C16T).
```

## How to Deploy this Flake?

> Note: you should NOT deploy this flake directly on your machine, it contains my hardware information and personal information which is not suitable for you. You may use this repo as a reference to build your own configuration.

After installing NixOS with `nix-command` & `flake` enabled, follow the steps below to deploy this flake.

For NixOS, use the following commands:

```bash
# deploy one of the configuration based on the hostname
sudo nixos-rebuild switch --flake .

# we can also deploy using `make`, which is defined in Makefile
make deploy
```

For MacOS, use the following commands:

```bash
# deploy the darwin configuration(harmonicia)
make darwin

# deploy with details
make darwin-debug
```

## Install Apps from Flatpak

We can install apps from flathub, which has a lot of apps that are not supported well in nixpkgs.

```bash
# Add the Flathub repository
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

# install apps from flathub
flatpak install netease-cloud-music-gtk

# install 3d printer slicer - cura
flatpak install flathub com.ultimaker.cura

# or you can search apps from flathub
flatpak search <keyword>
# search on website is also supported: https://flathub.org/
```

## Run unmodified binaries on NixOS

> the `fhs` command is defined at [./modules/nixos/core-desktop.nix#L145](https://github.com/ryan4yin/nix-config/blob/v0.0.5/modules/nixos/core-desktop.nix#L145)

```shell
# Activating FHS drops me in a shell which looks like a "normal" Linux
$ fhs
(fhs) $ ls /usr/bin
(fhs) $ ./bin/code
```

for other methods, check out [Different methods to run a non-nixos executable on Nixos](https://unix.stackexchange.com/questions/522822/different-methods-to-run-a-non-nixos-executable-on-nixos).

## How to create & managage VM from this flake?

use `aquamarine` as an example, we can create a virtual machine with the following command:

```shell
# 1. generate a proxmox vma image file
nom build .#aquamarine  # `nom`(nix-output-monitor) can be replaced by the standard command `nix`

# 2. upload the genereated image to proxmox server's backup directory `/var/lib/vz/dump`
#    please replace the vma file name with the one you generated in step 1.
scp result/vzdump-qemu-aquamarine-nixos-23.11.20230603.dd49825.vma.zst root@192.168.5.174:/var/lib/vz/dump

# 3. the image we uploaded will be listed in proxmox web ui's this page: [storage 'local'] -> [backups], we can restore a vm from it via the web ui now.
```

Once the virtual machine `aquamarine` is created, we can deploy updates to it with the following commands:

```shell
# 1. add the ssh key to ssh-agent
ssh-add ~/.ssh/ai-idols

# 2. deploy the configuration to the remote host, using the ssh key we added in step 1
#    and the username defaults to `$USER`, it's `ryan` in my case.
nixos-rebuild --flake .#aquamarine --target-host aquamarine --build-host aquamarine switch --use-remote-sudo --verbose
```

The commands above will build & deploy the configuration to `aquamarine`, the build process will be executed on `aquamarine` too, and the `--use-remote-sudo` option indicates that we will use `sudo` on the remote host, because `nixos-rebuild switch` needs root permission to deploy the configuration.

## Other Interesting Dotfiles

Other dotfiles && docs that inspired me:

- [NixOS-CN/NixOS-CN-telegram](https://github.com/NixOS-CN/NixOS-CN-telegram)
- [Tips&Tricks for NixOS Desktop](https://discourse.nixos.org/t/tips-tricks-for-nixos-desktop/28488/2)
- [notwidow/hyprland](https://github.com/notwidow/hyprland): hyprland configuration
- [denisse-dev/dotfiles](https://github.com/denisse-dev/dotfiles)
- [notusknot/dotfiles-nix](https://github.com/notusknot/dotfiles-nix)
- [xddxdd/nixos-config](https://github.com/xddxdd/nixos-config)
- [bobbbay/dotfiles](https://github.com/bobbbay/dotfiles)
- [gytis-ivaskevicius/nixfiles](https://github.com/gytis-ivaskevicius/nixfiles)
- [fufexan/dotfiles](https://github.com/fufexan/dotfiles)
- [davidtwco/veritas](https://github.com/davidtwco/veritas)
- [gvolpe/nix-config](https://github.com/gvolpe/nix-config)