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# 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, lib, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hel/hw.nix
      ./hel/boot.nix
      ./users.nix
      ./custom/zsh.nix
      ./custom/tinc/def.nix
      ./custom/uucp.nix
    ];

  system.stateVersion = "16.09";

  networking = {
    hostName = "hel";
    wireless = {
      enable = true;
      userControlled = {
        enable = true;
        group = "network";
      };
    };

    firewall = {
      enable = true;
      allowedTCPPorts = [ 22 # ssh
                        ];
    };
  };

  powerManagement.enable = true;

  i18n = {
    consoleFont = "lat9w-16";
    consoleKeyMap = "dvp";
    defaultLocale = "en_US.UTF-8";
  };

  boot.kernelPackages = pkgs.linuxPackages_latest;

  environment.systemPackages = with pkgs; [
    git
    slock
    shadow
    (callPackage ./custom/thinklight.nix { thinklight = "kbd_backlight"; })
    (callPackage ./utils/nix/rebuild-system.nix {})
  ];

  services = {
    logind.extraConfig = ''
      HandleLidSwitch=suspend
    '';

    openssh.enable = true;

    xserver = {
      enable = true;
      
      layout = "us";
      xkbVariant = "dvp";
      xkbOptions = "compose:caps";
      
      displayManager.slim = {
        enable = true;
        defaultUser = "gkleen";
      };

      desktopManager = {
        default = "none";
        xterm.enable = false;
      };

      windowManager = {
        default = "xmonad";
        xmonad = {
          enable = true;
          enableContribAndExtras = true;
          extraPackages = haskellPackages: (with haskellPackages; [ hostname ]);
        };
      };

      wacom.enable = true;
      multitouch.enable = true;

      dpi = 210;
    };

    ntp.enable = false;
    timesyncd.enable = true;

    customTinc.networks = ((import ./custom/tinc/yggdrasil.nix) {
      inherit (pkgs) stdenv nettools openresolv;
      connect = true;
      name = "hel";
      ipConf = {
        ip4 = [ { address = "10.141.2.3"; prefixLength = 16; } ];
      };
    });
    uucp = {
      enable = true;
      nodeName = "hel";
      remoteNodes = ["isaac" "ymir"]; # legacy name for odin
      sshUser = {
        openssh.authorizedKeys.keys = [ ''no-port-forwarding,no-X11-forwarding,no-agent-forwarding,command="/var/setuid-wrappers/uucico" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEgtDHA7oDIaRwggGGznNaKZF68rFTziqefSCn1t9ZKe uucp@odin''
	                                ''no-port-forwarding,no-X11-forwarding,no-agent-forwarding,command="/var/setuid-wrappers/uucico" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFH1QWdgoC03nzW5GBuCl2pqASHeIXIYtE9IInHdaKcO uucp@ymir''
                                      ];
      };
      sshConfig = ''
        Host isaac
          Hostname odin.asgard.yggdrasil
          IdentityFile ~/.ssh/odin
	Host ymir
	  Hostname ymir.niflheim.yggdrasil
	  IdentityFile ~/.ssh/ymir
      '';
      commandPath = [];
      defaultCommands = [];
    };
  };

  users = {
    mutableUsers = false;
  
    extraUsers.root = { inherit (import ./users/gkleen.nix) shell hashedPassword; };

    extraGroups = {
      network = {};
      media = {
        members = [ "gkleen" "uucp" ];
      };
    };
  };

  security = {
    sudo.extraConfig = ''
      Cmnd_Alias  SYSCTRL = /run/current-system/sw/sbin/shutdown, /run/current-system/sw/sbin/reboot, /run/current-system/sw/sbin/halt, /run/current-system/sw/bin/systemctl
      %wheel ALL=(ALL) NOPASSWD: SYSCTRL
    '';

    setuidPrograms = ["slock" "mount" "mount.nfs" "umount" "newgrp" "thinklight"];
  };

  time.timeZone = "Europe/Berlin";

  hardware.pulseaudio = {
    enable = true;
  };

  sound.enable = true;

  nix.gc = {
    automatic = true;
    dates = "daily";
    options = "--delete-older-than 30d";
  };

  environment.etc."X11/xorg.conf.d/50-wacom.conf".source = lib.mkForce ./hel/wacom.conf;
}