nixos/common.nix

{ config, lib, pkgs, ... }:
{
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  system.stateVersion = "26.05";
  time.timeZone = "Asia/Chita";
  i18n.defaultLocale = "ru_RU.UTF-8";
  console = {
    keyMap = "ruwin_alt_sh-UTF-8";
    font = "cyr-sun16";
  };
  fileSystems = {
    "/" = { options = [ "noatime" ]; };
    "/boot" = { options = [ "noatime" ]; };
  };
  swapDevices = [ { device = "/var/swapfile"; } ];
  boot = {
    kernelModules = [ "amneziawg" ];
    kernelPackages = pkgs.linuxPackages_latest;
    extraModulePackages = [ config.boot.kernelPackages.amneziawg ];
    loader.limine = {
      enable = true;
      secureBoot.enable = true;
      panicOnChecksumMismatch = true;
    };
  };
  users.users.root.hashedPasswordFile = "/secrets/user/root-pw";
  networking = {
    firewall = {
      allowedTCPPorts = [ 53 80 2049 ];
      allowedUDPPorts = [ 53 67 69 547 ];
    };
    nat = {
      enable = true;
      enableIPv6 = true;
      internalInterfaces = [ "enp1s0" ];
    };
    wg-quick.interfaces.awg0 = {
      type = "amneziawg";
      peers = [ {
        endpoint = "bogaledev.ru";
        allowedIPs = [ "::/0" "0.0.0.0/0" ];
      } ];
    };
    networkmanager = {
      enable = true;
      ensureProfiles = {
        environmentFiles = [ "/secrets/wifi.env" ];
        profiles = {
          ethernet = {
            ipv6 = {
              method = "manual";
              addresses = "fc02::1/64";
            };
            ipv4 = {
              method = "manual";
              addresses = "10.2.0.1/16";
            };
            connection = {
              id = "ethernet";
              type = "802-3-ethernet";
            };
          };
          wifi = {
            wifi-security.key-mgmt = "sae";
            ipv6 = {
              method = "manual";
              gateway = "fc01::1";
            };
            ipv4 = {
              method = "manual";
              gateway = "10.1.0.1";
            };
            connection = {
              id = "wifi";
              type = "802-11-wireless";
            };
          };
        };
      };
    };
  };
  environment.systemPackages = with pkgs; [
    jq
    _7zz
    sbctl
    dracut
    openssl
    grub2_efi
  ];
  services = {
    logind.settings.Login.HandleLidSwitch = "ignore";
    openssh = {
      enable = true;
      settings.PasswordAuthentication = false;
    };
    nginx = {
      enable = true;
      recommendedTlsSettings = true;
      recommendedGzipSettings = true;
      recommendedOptimisation = true;
      recommendedProxySettings = true;
      recommendedBrotliSettings = true;
    };
    nfs.server = {
      enable = true;
      exports = let
        clients."10.2.0.0/16" = [ "mp" "rw" "no_root_squash" ];
      in {
        "/srv/nfs/arch/root" = clients;
        "/srv/nfs/fedora/root" = clients;
      };
    };
    dnsmasq = {
      enable = true;
      settings = {
        enable-ra = true;
        no-resolv = true;
        cache-size = 4096;
        bogus-priv = true;
        enable-tftp = true;
        interface = "enp1s0";
        domain-needed = true;
        tftp-root = "/srv/tftp";
        dhcp-boot = "grubx64.efi";
        dhcp-range = [ "10.2.0.2,10.2.255.254,12h"
        "fc02::2,fc02::ffff:ffff:ffff:ffff,12h" ];
        server = [ "1.1.1.2" "2606:4700:4700::1112"
        "1.0.0.2" "2606:4700:4700::1002" ];
      };
    };
  };
  systemd.services.pxeboot = {
    serviceConfig.Type = "oneshot";
    wantedBy = [ "multi-user.target" ];
    path = with pkgs; [ xz dracut grub2_efi util-linux ];
    script = let
      grubCfg = pkgs.writeText "grub.cfg" ''
        set timeout=10
        set path=(http,$net_default_server)/local/boot/pxe
        set nfs="rw ifname=ens0:$net_default_mac ip=$net_default_ip::$net_default_server:255.255.0.0::ens0:none root=nfs4:$net_default_server:/srv/nfs"
        menuentry Arch {
          linux $path/arch/linux $nfs/arch/root
          initrd $path/arch/initramfs
        }
        menuentry Fedora {
          linux $path/fedora/linux $nfs/fedora/root selinux=0
          initrd $path/fedora/initramfs
        }
      '';
    in ''
      if [ ! -e /srv/tftp/grubx64.efi ]; then
        echo "Building grub"
        grub-mkstandalone -O x86_64-efi --compress=xz --modules=efinet -o /srv/tftp/grubx64.efi /boot/grub/grub.cfg=${grubCfg}
      fi
      for distro in arch:arch/x86_64/airootfs.sfs fedora:LiveOS/squashfs.img; do
        rootfs=''${distro#*:}
        distro=''${distro%%:*}
        cd /srv/nfs/$distro
        mkdir -p loop lower upper work root
        mountpoint -q loop || mount $distro.iso loop
        mountpoint -q lower || mount loop/$rootfs lower
        mountpoint -q root || mount -t overlay overlay -o lowerdir=lower,upperdir=upper,workdir=work,nfs_export=on root
        cd /srv/http/local/boot/pxe
        if [ ! -e $distro ]; then
          mkdir $distro
          modsDir=$OLDPWD/lower/usr/lib/modules/*
          cp $modsDir/vmlinuz $distro/linux
          dracut -Nvm "network-manager nfs" --zstd --kver $(basename $modsDir) -k $modsDir $distro/initramfs
          chmod -R 640 $distro
          chgrp -R php $distro
          chmod ug+x $distro
        fi
      done
    '';
  };
}