nix/nixos/configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ pkgs, ... }:

let
  sourcehut-fqdn = "sourcehut.nixos.local";
in
{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "nixos"; # Define your hostname.
  networking.extraHosts = ''
    127.0.0.1 sourcehut.nixos.local
    127.0.0.1 meta.sourcehut.nixos.local
    127.0.0.1 man.sourcehut.nixos.local
    127.0.0.1 git.sourcehut.nixos.local
  '';
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Enable networking
  networking.networkmanager.enable = true;

  # setup magicdns for tailscale
  networking.nameservers = [ "100.100.100.100" "1.1.1.1" "8.8.8.8" ];
  networking.search = [ "hummingbird-stork.ts.net" ];

  # Set your time zone.
  time.timeZone = "Europe/Paris";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "fr_FR.UTF-8";
    LC_IDENTIFICATION = "fr_FR.UTF-8";
    LC_MEASUREMENT = "fr_FR.UTF-8";
    LC_MONETARY = "fr_FR.UTF-8";
    LC_NAME = "fr_FR.UTF-8";
    LC_NUMERIC = "fr_FR.UTF-8";
    LC_PAPER = "fr_FR.UTF-8";
    LC_TELEPHONE = "fr_FR.UTF-8";
    LC_TIME = "fr_FR.UTF-8";
  };

  # Enable the X11 windowing system.
  # You can disable this if you're only using the Wayland session.
  services.xserver.enable = true;

  # Enable the KDE Plasma Desktop Environment.
  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;

  # does this add river to sddm menu?
  programs.river.enable = true;

  # Configure keymap in X11
  services.xserver = {
    layout = "fr";
    xkbVariant = "";
  };

  # Configure console keymap
  console.keyMap = "fr";

  # Enable CUPS to print documents.
  services.printing.enable = true;

  # Enable sound with pipewire.
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    # If you want to use JACK applications, uncomment this
    #jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.xserver.libinput.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.khais = {
    isNormalUser = true;
    description = "Khaïs COLIN";
    extraGroups = [ "networkmanager" "wheel" "podman" ];
    shell = pkgs.zsh;
  };

  users.users.guest = {
    isNormalUser = true;
    description = "Guest Account";
    extraGroups = [ "networkmanager" ];
    shell = pkgs.zsh;
    packages = with pkgs; [
      mpv
      vlc
    ];
  };

  # Install firefox.
  programs.firefox.enable = true;

  # chroot jail
  programs.firejail.enable = true;

  # shell
  programs.zsh.enable = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;
  # configure overlays
  nixpkgs.overlays = [
    #(import ./overlays/cacert.nix)
  ];

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    neovim
    home-manager
    git
    gnumake
    cifs-utils
    tailscale
    wluma
    # man pages
    man-pages man-pages-posix
    # kde
    kdePackages.kate kdePackages.plasma-workspace kdePackages.dolphin
    # fix kde apps having no icons
    kdePackages.qtsvg
  ];

  # set global environment variables
  environment.sessionVariables = {
    # I don't know what this does, but it is needed for wluma to work correctly.
    # It will also slightly increase cpu usage (on wayland compositors), but shouldn't be too bad.
    WLR_DRM_NO_MODIFIERS = 1;
    # fix dolphin file associations not working
    XDG_MENU_PREFIX = "plasma-";
  };

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  # automount smb music share
  fileSystems."/home/khais/Music" = {
    device = "//void/Music";
    fsType = "cifs";
    options = let 
      # prevent hanging when network is not reachable
      automount_opts = "x-systemd.automount,noauto,x-systemd.idle-timeout=60,x-systemd.device-timeout=5s,x-systemd.mount-timeout=5s";
    in [ "${automount_opts},credentials=/etc/nixos/secrets/music.smb" ];
  };

  fileSystems."/home/khais/Books" = {
    device = "//void/Books";
    fsType = "cifs";
    options = let 
      # prevent hanging when network is not reachable
      automount_opts = "x-systemd.automount,noauto,x-systemd.idle-timeout=60,x-systemd.device-timeout=5s,x-systemd.mount-timeout=5s";
    in [ "${automount_opts},credentials=/etc/nixos/secrets/books.smb" ];
  };

  # font configuration
  fonts = {
    packages = with pkgs; [
      nerdfonts
      ibm-plex
      cm_unicode
    ];
    fontconfig = {
      defaultFonts = {
        monospace = [ "VictorMono NF Medium" ];
        sansSerif = [ "IBM Plex Sans" ];
        serif = [ "CMU Serif" ];
      };
    };
  };

  # fingerprint sensor setup
  services.open-fprintd.enable = true;
  services.python-validity.enable = true;

  # List services that you want to enable:

  services.tailscale = {
    enable = true;
    useRoutingFeatures = "both";
    extraUpFlags = [ "--ssh" ];
  };

  # enable wluma for automatic brightness adjustment
  systemd.user.services.wluma = {
    enable = true;
    description = "Adjusting screen brightness based on screen contents and amount of ambient light";
    after = [ "graphical-session.target" ];
    partOf = [ "graphical-session.target" ];
    serviceConfig = {
      ExecStart = "${pkgs.wluma}/bin/wluma";
      Restart = "always";
    };
    wantedBy = [ "graphical-session.target" ];
  };

  # enable selfhosted sourcehut instance
  services.sourcehut = {
    enable = true;
    meta = {
      enable = true;
      gunicorn.extraArgs = [
        "--timeout 120"
        "--workers 1"
        "--log-level=info"
        "--bind [::1]:5000"
      ];
    };
    git = {
      enable = true;
      gunicorn.extraArgs = [
        "--timeout 120"
        "--workers 1"
        "--log-level=info"
        "--bind [::1]:5001"
      ];
    };
    man = {
      enable = true;
      gunicorn.extraArgs = [
        "--timeout 120"
        "--workers 1"
        "--log-level=info"
        "--bind [::1]:5004"
      ];
    };
    nginx.enable = true;
    postgresql.enable = true;
    redis.enable = true;
    settings = {
      "sr.ht" = {
        environment = "production";
        global-domain = "${sourcehut-fqdn}";
        origin = "http://${sourcehut-fqdn}";
        network-key = "/etc/nixos/secrets/sourcehut/network.key";
        service-key = "/etc/nixos/secrets/sourcehut/service.key";
      };
      "git.sr.ht" = {
        oauth-client-id = "7f2819091157584f";
        oauth-client-secret = "/etc/nixos/secrets/sourcehut/git.oauth";
        origin = "http://git.${sourcehut-fqdn}";
      };
      "man.sr.ht" = {
        oauth-client-id = "man.sr.ht";
        oauth-client-secret = "/etc/nixos/secrets/sourcehut/man.oauth";
        origin = "http://man.${sourcehut-fqdn}";
      };
      "meta.sr.ht" = {
        origin = "http://meta.${sourcehut-fqdn}";
        onboarding-redirect = "http://meta.${sourcehut-fqdn}";
      };
      mail = {
        pgp-key-id = "/etc/nixos/secrets/sourcehut/mail.key.id";
        pgp-privkey = "/etc/nixos/secrets/sourcehut/mail.key";
        pgp-pubkey = "/etc/nixos/secrets/sourcehut/mail.key.pub";
        smtp-from = "mail@${sourcehut-fqdn}";
      };
      webhooks.private-key = "/etc/nixos/secrets/sourcehut/webhook.key";
    };
  };

  # security.acme = {
  #   certs."${sourcehut-fqdn}".extraDomainNames = [
  #     "meta.${sourcehut-fqdn}"
  #     "man.${sourcehut-fqdn}"
  #     "git.${sourcehut-fqdn}"
  #   ];
  #   acceptTerms = true;
  #   defaults.email = "khais.colin+letsencrypt@gmail.com";
  # };

  security.pki.certificateFiles = [
    /etc/nixos/secrets/certs/myCA.pem
  ];

  services.nginx = {
    enable = true;
    recommendedTlsSettings = false;
    recommendedOptimisation = true;
    recommendedGzipSettings = true;
    recommendedProxySettings = true;
    virtualHosts = {
      "${sourcehut-fqdn}" = {
        sslCertificate = "/etc/nixos/secrets/certs/sourcehut.nixos.local.crt";
        sslCertificateKey = "/etc/nixos/secrets/certs/sourcehut.nixos.local.key";
      };
      "meta.${sourcehut-fqdn}" = {
        sslCertificate = "/etc/nixos/secrets/certs/sourcehut.nixos.local.crt";
        sslCertificateKey = "/etc/nixos/secrets/certs/sourcehut.nixos.local.key";
      };
      "man.${sourcehut-fqdn}" = {
        sslCertificate = "/etc/nixos/secrets/certs/sourcehut.nixos.local.crt";
        sslCertificateKey = "/etc/nixos/secrets/certs/sourcehut.nixos.local.key";
      };
      "git.${sourcehut-fqdn}" = {
        sslCertificate = "/etc/nixos/secrets/certs/sourcehut.nixos.local.crt";
        sslCertificateKey = "/etc/nixos/secrets/certs/sourcehut.nixos.local.key";
      };
    };
  };

  services.postgresql.enable = true;

  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # enable manpages documentation
  documentation = {
    man = {
      enable = true;
      generateCaches = true;
    };
    info.enable = true;
    dev.enable = true; # linux man-pages project, dev documenation
  };

  # enable docker virtualization
  virtualisation.podman = {
    enable = true;
    # create alias mapping docker to podman
    dockerCompat = true;
    dockerSocket.enable = true;
  };

  # configure ssh
  programs.ssh = {
    enable = true;
    # ensure remote nix build can acces nix environment
    # https://wiki.nixos.org/wiki/Distributed_build
    matchBlocks.void.setEnv.PATH = "/nix/var/nix/profiles/default/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin";
  };

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "24.05"; # Did you read the comment?

  # flakes
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # automatically collect garbage
  nix.gc = {
    automatic = true;
    dates = "weekly";
    options = "--delete-older-than 60d";
  };
}