NixOS/miniserver/configuration.org

#+TITLE: JawZ NixOS server configuration
#+AUTHOR: Danilo Reyes
#+PROPERTY: header-args :tangle configuration.nix
#+auto_tangle: t

* TODO [0/6]
- [ ] System configurations [0/8]
  - [ ] fail2ban
- [ ] Misc [0/3]
  - [ ] Figure out how to get rid of xterm


* DECLARATION
Here I will declare the dependencies and variables that I call multiple times
through the config file, such as the current version of NixOS, repositories and
even some scripts that I reuse on systemd configurations.

- version: used by both NixOS and home-manager to dictate the state repository
  from which to pull configurations, modules and packages.
- myEmail myName: used by git and acme
- cpuArchitecture: used by NixOS to optimize the compiled binaries to my current
  CPU specifications.
- home-manager: the channel containing the packages matching the NixOS state
  version, with a commented out to the unstable master.
- unstable: a sort of overlay that allows to prepend "unstable" to a package,
  to pull from the unstable channel rather than precompiled binaries on a case
  by case use.
- jawz*: scripts that will reuse multiple times through the config, such as
  on systemd, and as such this feels like a safe way to compile them only once.

#+begin_src nix
{ config, pkgs, lib, ... }:
let
  version = "23.11";
  myEmail = "CaptainJawZ@outlook.com";
  myName = "Danilo Reyes";
  cpuArchitecture = "alderlake";
  home-manager = builtins.fetchTarball
    # "https://github.com/nix-community/home-manager/archive/master.tar.gz";
    "https://github.com/nix-community/home-manager/archive/release-${version}.tar.gz";
  unstable = import
    (builtins.fetchTarball "https://github.com/nixos/nixpkgs/tarball/master") {
    config = config.nixpkgs.config;
  };
  jawzManageLibrary = pkgs.writeScriptBin
    "manage-library" (builtins.readFile ../scripts/manage-library.sh);
  jawzTasks = pkgs.writeScriptBin
    "tasks" (builtins.readFile ../scripts/tasks.sh);
  jawzSubs = pkgs.writeScriptBin
    "sub-sync" (builtins.readFile ../scripts/sub-sync.sh);
  jawzStream = pkgs.writeScriptBin
    "stream-dl" (builtins.readFile ../scripts/stream-dl.sh);
in
{ # Remember to close this bracket at the end of the document
#+end_src

These are files and modules which get loaded onto the configuration file, in the
future I may segment this file into different modules once it becomes too
cluttered, for example, I may create a module for systemd units.

- agenix: an encryption system which cleans up the nix-configuration files from
passwords and other secrets.

#+begin_src nix
imports = [
  ./fstab.nix
  ./servers.nix
  ./docker.nix
  # ./mail.nix
  # ./openldap.nix
  # <agenix/modules/age.nix>
  (import "${home-manager}/nixos")
];
#+end_src

* SYSTEM CONFIGURATION
** NETWORKING
Sets sensible networking options, such as setting up a hostname, and creating a
hosts file with the static IP and hostname of other devices on my network.

Also open ports on the firewall for LAN connectivity, and well keeping commented
what each port does, I declared the firwewall ports with variables, because I
don't care to figure out whether I need TCP or UDP so let's open both, and
repetition is maddening.

#+begin_src nix
powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
networking = {
  useDHCP = lib.mkDefault true;
  enableIPv6 = false;
  hostName = "miniserver";
  networkmanager.enable = true;
  extraHosts = ''
               192.168.1.64 workstation
               192.168.1.69 server
               '';
  firewall = let
    open_firewall_ports = [
      51413 # torrent sedding
      9091 # qbittorrent
      2049 # nfs
    ];
    open_firewall_port_ranges = [ ];
  in
    {
      enable = true;
      allowPing = true;
      allowedTCPPorts = open_firewall_ports;
      allowedUDPPorts = open_firewall_ports;
      allowedTCPPortRanges = open_firewall_port_ranges;
      allowedUDPPortRanges = open_firewall_port_ranges;
    };
};
#+end_src

** TIMEZONE & LOCALE
For some reason, useXkbConfig throws an error when building the system, either
way it is an unnecessary setting as my keyboards are the default en_US, only
locale set to Canadian out because I prefer how it displays the date.
LC_MONETARY, it's also a personal preference.

#+begin_src nix
time.timeZone = "America/Mexico_City";
i18n = {
  defaultLocale = "en_CA.UTF-8";
  extraLocaleSettings = {
    LC_MONETARY = "es_MX.UTF-8";
  };
};
console = {
  font = "Lat2-Terminus16";
  keyMap = "us";
  #  useXkbConfig = true; # use xkbOptions in tty.
};
#+end_src

** SYSTEM/NIX CONFIGURATIONS
The first setting creates a copy the NixOS configuration file and link it from
the resulting system (/run/current-system/configuration.nix).  This is useful in
case you accidentally delete configuration.nix.

The version value determines the NixOS release from which the default settings for
stateful data, like file locations and database versions on your system.
It‘s perfectly fine and recommended to leave this value at the release version
of the first install of this system.

Lastly I configure in here cachix repositories, which is a website that keeps a
cache of nixbuilds for easy quick deployments without having to compile
everything from scratch.

- gc: automatically garbage-collects.
- auto-optimise-store: hard-links binaries whenever possible.
- system-features: features present on compiling time.

#+begin_src nix
system = {
  copySystemConfiguration = true;
  stateVersion = "${version}";
};
nix = let featuresList = [
      "nixos-test"
      "benchmark"
      "big-parallel"
      "kvm"
      "gccarch-${cpuArchitecture}"
      "gccarch-znver3"
    ];
      in
        {
  gc = {
    automatic = true;
    dates = "weekly";
  };
  buildMachines = [ {
      hostName = "workstation";
      system = "x86_64-linux";
      sshUser = "nixremote";
      maxJobs = 14;
      speedFactor = 1;
      supportedFeatures = featuresList;
  } ];
  distributedBuilds = true;
  settings = {
    cores = 3;
    auto-optimise-store = true;
    trusted-users = [ "nixremote" ];
    system-features = featuresList;
    substituters = [
      "https://nix-gaming.cachix.org"
      "https://nixpkgs-python.cachix.org"
      "https://devenv.cachix.org"
      "https://cuda-maintainers.cachix.org"
    ];
    trusted-public-keys = [
      "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
      "nixpkgs-python.cachix.org-1:hxjI7pFxTyuTHn2NkvWCrAUcNZLNS3ZAvfYNuYifcEU="
      "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
      "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
    ];
  };
};
#+end_src

* SECURITY
Disabled password in sudo for commodity, but this is obviously not recommended,
regarding rkit, that setting enables pipewire to run with real-time
capabilities.  And lastly, the acme settings are for signing certificates.

The pam limits exists so NixOS can compile the entire system without running
into "Too many files open" errors.

#+begin_src nix
security = {
  acme = {
    acceptTerms = true;
    defaults.email = myEmail;
  };
  rtkit.enable = true;
  sudo = {
    enable = true;
    wheelNeedsPassword = false;
  };
  pam.loginLimits = [{
    domain = "*";
    type = "soft";
    item = "nofile";
    value = "8192";
  }];
};
#+end_src

* NIXPKGS SETTINGS
Allow non-free, sadly is a requirement for some of my drivers, besides that,
here is a good place to declare some package overrides as well as permit unsafe
packages.

localSystem allows me to compile the entire operating system optimized to my CPU
architecture and other build flags.

=note= if using gcc.arch flags, comment out hostPlatform and viceversa.

#+begin_src nix
nixpkgs = {
  hostPlatform = lib.mkDefault "x86_64-linux";
  config = {
    allowUnfree = true;
    permittedInsecurePackages = [
      "openssl-1.1.1w"
    ];
  };
  # localSystem = {
  #   gcc.arch = cpuArchitecture;
  #   gcc.tune = cpuArchitecture;
  #   system = "x86_64-linux";
  # };
};
#+end_src

* NORMAL USERS
Being part of the "wheel" group, means that the user has root privileges.  The
piracy.gid is so I have read/write access permissions on all the hard drives
split among my multiple systems, the rest of the groups are self explanatory.

- nixremote: is a low-privilege user set exclusively with the intention to be a
  proxy to build the nix-store remotely.

#+begin_src nix
users = {
  groups.nixremote = {
    name = "nixremote";
    gid = 555;
  };
  users.nixremote = {
    isNormalUser = true;
    createHome = true;
    group = "nixremote";
    home = "/var/nixremote/";
    openssh.authorizedKeys.keys = [
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICiyTwryzw8CblPldplDpVUkXD9C1fXVgO8LeXdE5cuR root@workstation"
      ""
    ];
  };
};
users.users.jawz = {
  isNormalUser = true;
  extraGroups = [ "wheel" "networkmanager" "docker"
                  "scanner" "lp" "piracy" "kavita"
                  "render" "video"
                ];
  initialPassword = "password";
  openssh = {
    authorizedKeys.keys = [
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB5GaQM4N+yGAByibOFQOBVMV/6TjOfaGIP+NunMiK76 gpodeacero\cdreyes@100CDREYES"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMkpeIV9G26W2/e9PsjBx3sNwPGoicJ807ExRGh4KjhW jawz@server"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH2wtsaMvfEUm//2YnFHyrc16o+TOXXBfIGPJ9nL8RMp jawz@workstation"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINBEblxSDhWPEo33crSjooeUg4W02ruENxHLmmBqCuIo jawz@galaxy"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN6HsajaTL+nTJtSIu00M5WJwgt/7fyU59gBr2R7tbnv root@server"
    ];
  };
#+end_src

This section of the document categorizes and organizes all he packages that I
want installed, attempting to group them as dependencies of others when
necessary.

* USER PACKAGES
This section of the document categorizes and organizes all he packages that I
want installed, attempting to group them as dependencies of others when
necessary.

Begin the block to install user packages.

#+begin_src nix
packages = (with pkgs; [
#+end_src

cli and tui packages, which on their own right are as or more powerful than the
packages on the previous section.

** HUNSPELL
These dictionaries work with Firefox, Doom Emacs and LibreOffice.

#+begin_src nix
hunspell
hunspellDicts.it_IT
hunspellDicts.es_MX
hunspellDicts.en_CA
#+end_src

** CUSTOMIZATION PACKAGES
Themes and other customization, making my DE look the way I want is one of the
main draws of Linux for me.

#+begin_src nix
symbola
#+end_src

** COMMAND-LINE PACKAGES

#+begin_src nix
unstable.yt-dlp # downloads videos from most video websites
unstable.gallery-dl # similar to yt-dlp but for most image gallery websites

fd # modern find, faster searches
fzf # fuzzy finder! super cool and useful
gdu # disk-space utility, somewhat useful
du-dust # rusty du
trash-cli # oop! didn't meant to delete that
eza # like ls but with colors
rmlint # probably my favourite app, amazing dupe finder that integrates well with BTRFS
smartmontools # check hard drie health
#+end_src

** MY SCRIPTS
Here I compile my own scripts into binaries

#+begin_src nix
jawzManageLibrary
jawzTasks
jawzSubs
jawzStream
(writeScriptBin "ffmpeg4discord" (builtins.readFile ../scripts/ffmpeg4discord.py))
(writeScriptBin "ffmpreg" (builtins.readFile ../scripts/ffmpreg.sh))
(writeScriptBin "split-dir" (builtins.readFile ../scripts/split-dir.sh))
(writeScriptBin "pika-list" (builtins.readFile ../scripts/pika-list.sh))
(writeScriptBin "run" (builtins.readFile ../scripts/run.sh))
(writeScriptBin "find-dup-episodes" (builtins.readFile ../scripts/find-dup-episodes.sh))
#+end_src

** DEVELOPMENT PACKAGES
Assorted development packages and libraries, categorized by languages.

#+begin_src nix
tldr # man for retards

# SH
bats # testing system, required by Exercism
bashdb # autocomplete
shellcheck # linting
shfmt # a shell parser and formatter

# NIX
expect # keep color when nom'ing
nix-output-monitor # autistic nix builds
nixfmt # linting
cachix # why spend time compiling?

# PYTHON.
(python3.withPackages (ps: with ps; [
    flake8 # wraper for pyflakes, pycodestyle and mccabe
    isort # sort Python imports
    nose # testing and running python scripts
    pyflakes # checks source code for errors
    pytest # framework for writing tests
    speedtest-cli # check internet speed from the comand line
    editorconfig # follow rules of contributin
    black # Python code formatter
    pylint # bug and style checker for python
])) # base language
#+end_src

** CUSTOM PYTHON SCRIPTS
Libraries & apps not found on the nix-store and scripts made by me.

#+begin_src nix
]) ++ (with pkgs.python3Packages; [
(buildPythonApplication rec {
    pname = "download";
    version = "1.5";
    src = ../scripts/download/.;
    doCheck = false;
    buildInputs = [ setuptools ];
    propagatedBuildInputs =
    [ pyyaml types-pyyaml ];
})
(buildPythonApplication rec {
    pname = "ffpb";
    version = "0.4.1";
    src = fetchPypi {
    inherit pname version;
    sha256 = "sha256-7eVqbLpMHS1sBw2vYS4cTtyVdnnknGtEI8190VlXflk=";
    };
    doCheck = false;
    buildInputs = [ setuptools ];
    propagatedBuildInputs =
    [ tqdm ];
})
# (buildPythonApplication rec {
#   pname = "qbit_manage";
#   version = "4.0.3";
#   src = fetchPypi {
#     inherit pname version;
#     sha256 = "sha256-7eVqbLpMHS1sBw2vYS4cTtyVdnnknGtEI8190VlXflk=";
#   };
#   doCheck = true;
#   buildInputs = [ setuptools ];
#   propagatedBuildInputs =
#     [ gitpython requests retrying ruamel-yaml schedule unstable.qbittorrent-api ];
# })
#+end_src

** NODEJS PACKAGES
Language servers and linters.

#+begin_src nix
]) ++ (with pkgs.nodePackages; [
  # Language servers
  dockerfile-language-server-nodejs
  yaml-language-server
  bash-language-server
  vscode-json-languageserver
  pyright

  markdownlint-cli # Linter
  prettier # Linter
  pnpm # Package manager
#+end_src

** CLOSING USER PACKAGES

#+begin_src nix
]); }; # <--- end of package list
#+end_src

* HOME-MANAGER
** HOME-MANAGER SETTINGS
These make it so packages install to '/etc' rather than the user home directory,
also allow for upgrades when rebuilding the system.

#+begin_src nix
home-manager = {
  useUserPackages = true;
  useGlobalPkgs = true;
  users.jawz = { config, pkgs, ... }:{
    home.stateVersion = "${version}";
#+end_src

** DOTFILES
I opted out of using home-manager to declare my package environment, and instead
I use it exclusively for setting up my dotfiles.

*** BASH
Declares my .bashrc file, and sets up some environment and functions.

#+begin_src nix
programs.bash = {
  enable = true;
  historyFile = "\${XDG_STATE_HOME}/bash/history";
  historyControl = [ "erasedups" "ignorespace" ];
  shellAliases = {
    hh = "hstr";
    ls = "eza --icons --group-directories-first";
    edit = "emacsclient -t";
    comic = "download -u jawz -i \"$(cat $LC | fzf --multi --exact -i)\"";
    gallery = "download -u jawz -i \"$(cat $LW | fzf --multi --exact -i)\"";
    cp = "cp -i";
    mv = "mv -i";
    mkcd = "mkdir -pv \"$1\" && cd \"$1\" || exit";
    mkdir = "mkdir -p";
    rm = "trash";
    ".." = "cd ..";
    "..." = "cd ../..";
    ".3" = "cd ../../..";
    ".4" = "cd ../../../..";
    ".5" = "cd ../../../../..";
    dl = "download -u jawz -i";
    e = "edit";
    c = "cat";
    f = "fzf --multi --exact -i";
    sc = "systemctl --user";
    jc = "journalctl --user -xefu";
    open-gallery = "cd /mnt/pool/scrapping/JawZ/gallery-dl &&
                 xdg-open $(fd . ./ Husbands -tdirectory -d 1 | fzf -i)\"";
    unique-extensions = "fd -tf | rev | cut -d. -f1 | rev  |
                      tr '[:upper:]' '[:lower:]' | sort |
                      uniq --count | sort -rn";
  };
  enableVteIntegration = true;
  initExtra = ''
    $HOME/.local/bin/pokemon-colorscripts -r --no-title
    # Lists
    list_root="${config.xdg.configHome}"/jawz/lists/jawz
    export LW=$list_root/watch.txt
    export LI=$list_root/instant.txt
    export LC=$list_root/comic.txt
    export command_timeout=30

    if command -v fzf-share >/dev/null; then
    source "$(fzf-share)/key-bindings.bash"
    source "$(fzf-share)/completion.bash"
    fi

    nixos-reload () {
        nixfmt /home/jawz/Development/NixOS/miniserver/*.nix
        sudo unbuffer nixos-rebuild switch -I nixos-config=/home/jawz/Development/NixOS/miniserver/configuration.nix |& nom
    }
  '';
};
#+end_src

*** XDG
Configurations for XDG directories, as well as installing dotfiles from the
sub-directory on this repository.

#+begin_src nix
xdg = {
  enable = true;
  userDirs = {
    enable = true;
    createDirectories = false;
    desktop = "${config.home.homeDirectory}";
    documents = "${config.home.homeDirectory}/Documents";
    download = "${config.home.homeDirectory}/Downloads";
    music = "${config.home.homeDirectory}/Music";
    pictures = "${config.home.homeDirectory}/Pictures";
    templates = "${config.xdg.dataHome}/Templates";
    videos = "${config.home.homeDirectory}/Videos";
  };
  configFile = {
    "wgetrc".source = ../dotfiles/wget/wgetrc;
    "configstore/update-notifier-npm-check.json".source = ../dotfiles/npm/update-notifier-npm-check.json;
    "npm/npmrc".source = ../dotfiles/npm/npmrc;
    "gallery-dl/config.json".source = ../dotfiles/gallery-dl/config.json;
    "htop/htoprc".source = ../dotfiles/htop/htoprc;
    "python/pythonrc".source = ../dotfiles/pythonrc;
    "unpackerr.conf".source = ../dotfiles/unpackerr.conf;
  };
};
#+end_src

** HOME-MANAGER PROGRAMS
Program declarations that are exclusive to home-manager, declaring packages this
way allows for extra configuration and integration beyond installing the
packages on the user environment, it's the only exception I make to installing
packages through home-manager.

#+begin_src nix
programs = {
  helix = {
    enable = true;
  };
  hstr.enable = true;
  emacs.enable = true;
  direnv = {
    enable = true;
    enableBashIntegration = true;
    nix-direnv.enable = true;
  };
  bat = {
    enable = true;
    config = {
      pager = "less -FR";
      theme = "base16";
    };
    extraPackages = with pkgs.bat-extras; [
      batman # man pages
      batpipe # piping
      batgrep # ripgrep
      batdiff # this is getting crazy!
      batwatch # probably my next best friend
      prettybat # trans your sourcecode!
    ];
  };
  git = {
    enable = true;
    userName  = "${myName}";
    userEmail = "${myEmail}";
  };
  htop = {
    enable = true;
    package = pkgs.htop-vim;
  };
};
#+end_src

** HOME-MANAGER USER-SERVICES
Lorri helps optimize emacs compilations, and the declaring emacs as a service
through home-manager fixes the bug where emacs loads so quickly that can not
connect to a graphic environment unless restarting the systemd service.

#+begin_src nix
services = {
  lorri.enable = true;
  emacs = {
    enable = true;
    defaultEditor = true;
    package = pkgs.emacs;
    startWithUserSession = "graphical";
  };
};
#+end_src

** CLOSING HOME-MANAGER

#+begin_src nix
}; };
#+end_src

* ENVIRONMENT
These are a MUST to ensure the optimal function of nix, without these, recovery
may be challenging.

The environment.etc block allows for bluetooth devices to control volume, pause,
and other things through the headset controls.

Declare environment variables whose function is mostly to clear-up the $HOME
directory from as much bloat as possible, as well as some minor graphical tweaks
some applications use.

#+begin_src nix
environment = {
  systemPackages = with pkgs; [
    wget
    jellyfin-ffmpeg # coolest video converter!
    mediainfo
    dlib
    fd
    ripgrep
  ];
  variables = rec {
    # PATH
    XDG_CACHE_HOME  = "\${HOME}/.cache";
    XDG_CONFIG_HOME = "\${HOME}/.config";
    XDG_BIN_HOME    = "\${HOME}/.local/bin";
    XDG_DATA_HOME   = "\${HOME}/.local/share";
    XDG_STATE_HOME  = "\${HOME}/.local/state";

    # DEV PATH
    CABAL_DIR = "${XDG_CACHE_HOME}/cabal";
    CARGO_HOME = "${XDG_DATA_HOME}/cargo";
    GEM_HOME = "${XDG_DATA_HOME}/ruby/gems";
    GEM_PATH = "${XDG_DATA_HOME}/ruby/gems";
    GEM_SPEC_CACHE = "${XDG_DATA_HOME}/ruby/specs";
    GOPATH = "${XDG_DATA_HOME}/go";
    NPM_CONFIG_USERCONFIG = "${XDG_CONFIG_HOME}/npm/npmrc";
    PNPM_HOME = "${XDG_DATA_HOME}/pnpm";
    PSQL_HISTORY="${XDG_DATA_HOME}/psql_history";
    REDISCLI_HISTFILE="${XDG_DATA_HOME}/redis/rediscli_history";
    WINEPREFIX="${XDG_DATA_HOME}/wine";
    PYTHONSTARTUP="${XDG_CONFIG_HOME}/python/pythonrc";
    STACK_ROOT="${XDG_DATA_HOME}/stack";

    # OPTIONS
    HISTFILE = "${XDG_STATE_HOME}/bash/history";
    LESSHISTFILE = "-";
    GHCUP_USE_XDG_DIRS = "true";
    RIPGREP_CONFIG_PATH = "${XDG_CONFIG_HOME}/ripgrep/ripgreprc";
    ELECTRUMDIR = "${XDG_DATA_HOME}/electrum";
    VISUAL = "emacsclient -ca emacs";
    WGETRC = "${XDG_CONFIG_HOME}/wgetrc";
    XCOMPOSECACHE = "${XDG_CACHE_HOME}/X11/xcompose";
    "_JAVA_OPTIONS" = "-Djava.util.prefs.userRoot=${XDG_CONFIG_HOME}/java";
    DOCKER_CONFIG="${XDG_CONFIG_HOME}/docker";

    # NVIDIA
    CUDA_CACHE_PATH = "${XDG_CACHE_HOME}/nv";

    # Themes
    # WEBKIT_DISABLE_COMPOSITING_MODE = "1";
    CALIBRE_USE_SYSTEM_THEME = "1";

    PATH = [
      "\${HOME}/.local/bin"
      "${XDG_CONFIG_HOME}/emacs/bin"
      "${XDG_DATA_HOME}/npm/bin"
      "${XDG_DATA_HOME}/pnpm"
    ];

    # needed for tensorflow
    # CUDA_PATH = "${pkgs.cudatoolkit}";
    # # LD_LIBRARY_PATH = "${pkgs.linuxPackages.nvidia_x11}/lib:${pkgs.ncurses5}/lib";
    # EXTRA_LDFLAGS = "-L/lib -L${pkgs.linuxPackages.nvidia_x11}/lib";
    # EXTRA_CCFLAGS = "-I/usr/include";
  };
};
#+end_src

* PROGRAMS
Some programs get enabled and installed through here, as well as the activation
of some services.

#+begin_src nix
programs = {
  starship.enable = true;
  tmux.enable = true;
  fzf.fuzzyCompletion = true;
  neovim = {
    enable = true;
    vimAlias = true;
  };
  gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };
};
#+end_src

* SERVICES
Miscellaneous services, managed by systemd.

- minidlna: allows me to watch my media on my TV.
- avahi: allows to discover/connect to devices through their hostname on the
  same network.
- fstrim/btrfs: file-system services.

#+begin_src nix
services = {
  # minidlna = {
  #   enable = true;
  #   openFirewall = true;
  #   settings = {
  #     inotify = "yes";
  #     media_dir = [
  #       "/mnt/pool/glue"
  #     ];
  #   };
  # };
  avahi = {
    enable = true;
    nssmdns = true;
  };
  fstrim.enable = true;
  smartd.enable = true;
  btrfs.autoScrub = {
    enable = true;
    fileSystems = [
      "/"
      "/mnt/pool"
    ];
  };
  openssh = {
    enable = true;
    openFirewall = true;
    startWhenNeeded = true;
    settings = {
      PasswordAuthentication = false;
      KbdInteractiveAuthentication = false;
    };
  };
};
#+end_src

* SYSTEMD
Home-manager, is not as flushed out when it comes to creating systemd units, so
the best way to define them for now, is using nix.

#+begin_src nix
systemd = {
  packages = let
    pkgs = import (builtins.fetchTarball {
        url = "https://github.com/NixOS/nixpkgs/archive/9957cd48326fe8dbd52fdc50dd2502307f188b0d.tar.gz";
    }) {};

    myPkg = pkgs.qbittorrent-nox;
in [ myPkg ];
  services = {
    "qbittorrent-nox@jawz" = {
      enable = true;
      overrideStrategy = "asDropin";
      wantedBy = [ "multi-user.target" ];
    };
  };
  timers = {
  };
  user = {
    services = {
      "stream@" = {
        description = "monitors a stream channel for online streams.";
 restartIfChanged = true;
        wantedBy = [ "default.target" ];
        path = [
          pkgs.nix
          jawzStream
        ];
        serviceConfig = {
          Restart = "on-failure";
          RestartSec = 30;
          ExecStart = "${jawzStream}/bin/stream-dl %I";
        };
      };
      # unpackerr = {
      #   enable = true;
      #   restartIfChanged = true;
      #   description = "Run unpackerr";
      #   wantedBy = [ "default.target" ];
      #   serviceConfig = {
      #     Restart = "on-failure";
      #     RestartSec = 30;
      #     ExecStart = "${pkgs.unpackerr}/bin/unpackerr -c /home/jawz/.config/unpackerr.conf";
      #   };
      # };
      manage-library = {
        enable = true;
        restartIfChanged = true;
        description = "Run the manage library bash script";
        wantedBy = [ "default.target" ];
        path = [
          pkgs.nix
          jawzManageLibrary
        ];
        serviceConfig = {
          Restart = "on-failure";
          RestartSec = 30;
          ExecStart = "${jawzManageLibrary}/bin/manage-library";
        };
      };
      tasks = {
        restartIfChanged = true;
        description = "Run a tasks script which keeps a lot of things organized";
        wantedBy = [ "default.target" ];
        path = [
          pkgs.nix
          jawzTasks
        ];
        serviceConfig = {
          Restart = "on-failure";
          RestartSec = 30;
          ExecStart = "${jawzTasks}/bin/tasks";
        };
      };
      qbit_manage = let qbit_dir = "/home/jawz/Development/Git/qbit_manage"; in {
        restartIfChanged = true;
        description = "Tidy up my torrents";
        wantedBy = [ "default.target" ];
        path = [
          pkgs.python3
          pkgs.pipenv
        ];
        serviceConfig = {
          Restart = "on-failure";
          RestartSec = 30;
          ExecStart = "${qbit_dir}/venv/bin/python3 ${qbit_dir}/qbit_manage.py -r -c ${qbit_dir}/config.yml";
        };
      };
    };
    timers = let
      streamTimer = {
        enable = true;
        description = "monitors a stream channel for online streams.";
        wantedBy = [ "timers.target" ];
        timerConfig = {
          OnBootSec = "5min";
          OnUnitActiveSec = "65min";
          RandomizedDelaySec = 30;
        };
      };
    in {
      "stream@johnneal911" = streamTimer // { };
      "stream@uk2011boy" = streamTimer // { };
      "stream@tommy9x6" = streamTimer // { };
      "stream@brocollirob" = streamTimer // { };
      "stream@tomayto\\x20picarto" = streamTimer // { };
      tasks = {
        enable = true;
        description = "Run a tasks script which keeps a lot of things organized";
        wantedBy = [ "timers.target" ];
        timerConfig = {
          OnCalendar = "*:0/10";
        };
      };
      manage-library = {
        enable = true;
        description = "Run the manage library bash script";
        wantedBy = [ "timers.target" ];
        timerConfig = {
          OnCalendar = "00:30";
        };
      };
      qbit_manage = {
        enable = true;
        description = "Tidy up my torrents";
        wantedBy = [ "timers.target" ];
        timerConfig = {
          OnCalendar = "*:0/10";
        };
      };
    };
  };
};
#+end_src

* FONTCONFIG
If enabled, a Fontconfig configuration file will point to a set of default
fonts.  If you don not care about running X11 applications or any other program
that uses Fontconfig, you can turn this option off and prevent a dependency on
all those fonts.
=tip= once that Wayland is ready for deployment, I probably can remove this
setting.

#+begin_src nix
fonts.fontconfig.enable = true;
#+end_src

* HARDWARE
Computer-specific hardware settings.  The power management settings default to
"performance".

- nvidia: GPU drivers.
- cpu.intel: microcode patches.

#+begin_src nix
hardware = {
  cpu.intel.updateMicrocode = lib.mkDefault true;
  opengl = {
    enable = true;
    driSupport = true;
    driSupport32Bit = true;
  };
};
#+end_src

* CLOSE SYSTEM
#+begin_src nix
}
#+end_src