config/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’).

{ config, pkgs, ... }:

let ssh_pubkeys = {
    motiejus = "ssh-rsa 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";
    vno1_root = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMiWb7yeSeuFCMZWarKJD6ZSxIlpEHbU++MfpOIy/2kh";
}; in {
  imports =
    [
      /etc/nixos/hardware-configuration.nix /etc/nixos/zfs.nix
    ];

  boot.initrd.network.enable = true;
  boot.initrd.network.ssh = {
    enable = true;
    port = 22;
    authorizedKeys = builtins.attrValues ssh_pubkeys;
    hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
  };

  services.zfs.autoSnapshot = {
    enable = true;
    frequent = 0;
    hourly = 24;
    daily = 7;
    weekly = 0;
    monthly = 0;
  };

  services.zfs.autoScrub.enable = true;
  services.zfs.trim.enable = true;

  networking.hostName = "hel1-a";
  time.timeZone = "UTC";

  users.users.motiejus = {
    isNormalUser = true;
    extraGroups = [ "wheel" ];
  };
  users.users.motiejus.openssh.authorizedKeys.keys = [ ssh_pubkeys.motiejus ];
  users.mutableUsers = false;

  security.sudo.wheelNeedsPassword = false;
  security.sudo.execWheelOnly = true;

  environment.systemPackages = with pkgs; [
    jq
    vim
    git
    tmux
    tree
    wget
    lsof
    file
    htop
    ncdu
    sqlite
    ripgrep
    binutils
    pciutils
    headscale
    nixos-option
  ];

  programs.mtr.enable = true;

  services.openssh = {
    enable = true;
    passwordAuthentication = false;
    permitRootLogin = "no";
    extraConfig = ''
      AcceptEnv GIT_PROTOCOL
    '';
  };

  services.locate = {
    enable = true;
    locate = pkgs.plocate;
    localuser = null;
  };

  services.headscale = {
    enable = true;
    serverUrl = "https://vpn.jakstys.lt";
    openIdConnect = {
      issuer = "https://git.jakstys.lt/";
      clientId = "1c5fe796-452c-458d-b295-71a9967642fc";
      clientSecretFile = "/var/src/secrets/headscale/oidc_client_secret";
    };
    settings = {
      ip_prefixes = [ "100.89.176.0/20" ];
      dns_config = {
        nameservers = [ "1.1.1.1" "8.8.4.4" ];
        magic_dns = true;
        base_domain = "jakst";
      };
    };
  };

  services.tailscale.enable = true;

  services.gitea = {
    enable = true;
    user = "git";
    database.user = "git";
    domain = "git.jakstys.lt";
    rootUrl = "https://git.jakstys.lt";
    httpAddress = "127.0.0.1";
    httpPort = 3000;
    settings = {
      admin.DISABLE_REGULAR_ORG_CREATION = true;
      api.ENABLE_SWAGGER = false;
      mirror.ENABLED = false;
      other.SHOW_FOOTER_VERSION = false;
      packages.ENABLED = false;
      repository.DEFAULT_REPO_UNITS = "repo.code,repo.releases";
      repository.DISABLE_MIGRATIONS = true;
      repository.DISABLE_STARS = true;
      repository.ENABLE_PUSH_CREATE_USER = true;
      server.ENABLE_GZIP = true;
      server.LANDING_PAGE = "/motiejus";
      service.DISABLE_REGISTRATION = true;
      service.ENABLE_TIMETRACKING = false;
      service.ENABLE_USER_HEATMAP = false;
      service.SHOW_MILESTONES_DASHBOARD_PAGE = false;
    };
    #service.explore.REQUIRE_SIGNIN_VIEW = true; does not work as of writing
    extraConfig = ''
      [service.explore]
      REQUIRE_SIGNIN_VIEW = true;
    '';
  };
  users.users.git = {
    description = "Gitea Service";
    home = "/var/lib/gitea";
    useDefaultShell = true;
    group = "gitea";
    isSystemUser = true;
  };

  services.caddy = {
    enable = true;
    email = "motiejus+acme@jakstys.lt";
    virtualHosts."vpn.jakstys.lt".extraConfig = ''
      reverse_proxy 127.0.0.1:8080
    '';
    virtualHosts."git.jakstys.lt".extraConfig = ''
      reverse_proxy 127.0.0.1:3000
    '';
  };

  programs.mosh.enable = true;
  networking.firewall.allowedTCPPorts = [ 80 443 ];
  networking.firewall.allowedUDPPorts = [ 443 ];

  system.copySystemConfiguration = true;

  system.autoUpgrade.enable = true;
  system.autoUpgrade = {
    allowReboot = true;
    rebootWindow = {
      lower = "00:00";
      upper = "00:30";
    };
  };

  # do not change
  system.stateVersion = "22.11"; # Did you read the comment?

}