NixOS 18.03 (To get zsh working, `nixos-rebuild switch; cp /etc/zsh ~/.zshrc; remove first two lines of zshrc`)

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, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # VirtualBox
  virtualisation.virtualbox.guest.enable = true;
  boot.initrd.checkJournalingFS = false;

  # Use the GRUB 2 boot loader.
  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only

  networking.hostName = "kendrick-t460s"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Select internationalisation properties.
  i18n = {
    consoleFont = "Lat2-Terminus16";
    consoleKeyMap = "us";
    defaultLocale = "en_US.UTF-8";
  };

  # Set your time zone.
  time.timeZone = "Australia/Brisbane";

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment = {
    systemPackages = with pkgs; [
      curl
      wget
      dmenu
      firefox
      git
      gparted
      haskell.packages.ghc802.hdevtools
      haskell.packages.ghc802.hoogle
      htop
      lambda-mod-zsh-theme
      gnome3.gedit
      gnome3.nautilus
      neovim
      oh-my-zsh
      p7zip
      python36
      python36Packages.neovim
      termite
      telnet
      tmux
      unrar
      unzip
      wget
      xlibs.xmodmap
      xlibs.xbacklight
      zsh
    ];
  };

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.bash.enableCompletion = true;
  # programs.mtr.enable = true;
  # programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
  programs.zsh = {
    enable = true;
    shellAliases = {
      vim = "nvim";
    };
    enableCompletion = true;
    enableAutosuggestions = true;
    interactiveShellInit = ''
      # z - jump around
      source ${pkgs.fetchurl {url = "https://github.com/rupa/z/raw/2ebe419ae18316c5597dd5fb84b5d8595ff1dde9/z.sh"; sha256 = "0ywpgk3ksjq7g30bqbhl9znz3jh6jfg8lxnbdbaiipzgsy41vi10";}}

      export ZSH=${pkgs.oh-my-zsh}/share/oh-my-zsh
      export ZSH_THEME="lambda"

      plugins=(git)

      source $ZSH/oh-my-zsh.sh
    '';
    promptInit = "";
  };

  # List services that you want to enable:

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

  # Enable sound.
  # sound.enable = true;
  # hardware.pulseaudio.enable = true;

  # Enable the X11 windowing system.
  services.xserver = {
    enable = true;
    layout = "us";
    xkbOptions = "eurosign:e";
    windowManager.xmonad = {
      enable = true;
      enableContribAndExtras = true;
      extraPackages = haskellPackages: [
        haskellPackages.xmonad-contrib
	haskellPackages.xmonad-extras
	haskellPackages.xmonad
      ];
    };
    windowManager.default = "xmonad";
    displayManager.sessionCommands = with pkgs; lib.mkAfter
    ''
    # Swap caps lock and escape
    xmodmap -e "keycode 9 = Caps_Lock NoSymbol Caps_Lock"
    xmodmap -e "keycode 66 = Escape NoSymbol Escape"
    xmodmap -e "clear Lock"
    '';
  };

  fonts = {
    enableCoreFonts = true;
    enableFontDir = true;
    fonts = with pkgs; [
      corefonts		  # Microsoft free fonts
      fira	      	  # Monospace
      inconsolata     	  # Monospace
      powerline-fonts
      ubuntu_font_family
      unifont		  # International languages
    ];
  };

  # Enable touchpad support.
  # services.xserver.libinput.enable = true;

  # Enable the KDE Desktop Environment.
  # services.xserver.displayManager.sddm.enable = true;
  # services.xserver.desktopManager.plasma5.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  # users.extraUsers.guest = {
  #   isNormalUser = true;
  #   uid = 1000;
  # };

  users = {
    defaultUserShell = pkgs.zsh;
    extraUsers.kendrick = {
      isNormalUser = true;
      home = "/home/kendrick";
      description = "Kendrick Tan";
      extraGroups = [ "wheel" "networkmanager" ];
      shell = pkgs.zsh;
    };
  };

  # Allow unfree build
  nixpkgs.config = {
    allowUnfree = true;

    packageOverrides = pkgs: rec {
      neovim = (import ./vim.nix);
    };
  };

  # This value determines the NixOS release with which your system is to be
  # compatible, in order to avoid breaking some software such as database
  # servers. You should change this only after NixOS release notes say you
  # should.
  system.stateVersion = "18.03"; # Did you read the comment?
}

vim.nix

with import <nixpkgs> {};

pkgs.neovim.override {
  vimAlias = true;
  configure = {
    customRC = ''
      " Use Vim settings, rather than Vi Settings
      set nocompatible

      "************************************************
      "" Settings
      "************************************************

      " deoplete
      let g:deoplete#enable_at_startup = 1
      let g:deoplete#enable_smart_case = 1
      let b:deoplete_disable_auto_complete = 1 

      " airline
      let g:airline#extensions#tabline#enabled = 1

      " syntastic
      set statusline+=%#warningmsg#
      set statusline+=%{SyntasticStatuslineFlag()}
      set statusline+=%*

      let g:syntastic_always_populate_loc_list = 1
      let g:syntastic_auto_loc_list = 1
      let g:syntastic_check_on_open = 1
      let g:syntastic_check_on_wq = 1

      " haskell
      let g:haskellmode_completion_ghc = 0
      let g:haskell_classic_highlighting = 1
      au FileType haskell nnoremap <buffer> <F1> :HdevtoolsType<CR>
      au FileType haskell nnoremap <buffer> <silent> <F2> :HdevtoolsClear<CR>
      autocmd FileType haskell setlocal shiftwidth=2 softtabstop=2

      "************************************************
      "" Key mappings
      "************************************************

      " Leader Key is `,`
      let mapleader=','

      " Buffer navigation
      noremap <leader>q :bp<CR>
      noremap <leader>w :bn<CR>
      noremap <leader>c :bd<CR>
      noremap <leader>C :bd!<CR>

      " Clears highlighted search terms
      nnoremap <silent> <C-l> :nohl<CR><C-l

      " Opens terminal
      noremap <leader>t :term<CR>

      " Toggle terminal input
      tnoremap <F12> <C-\><C-n> 

      " AutoFormat
      noremap <F5> :Neoformat<CR>

      " Toggle paste
      set pastetoggle=<F10>

      " Open Nerdtree
      noremap <F3> :NERDTreeToggle<CR>

      " Tab to autocomplete
      inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ deoplete#mappings#manual_complete()
      function! s:check_back_space() abort "{{{
        let col = col('.') - 1
        return !col || getline('.')[col - 1]  =~ '\s'
      endfunction"}}}

      "************************************************
      "" Core
      "************************************************
      syntax on					" Syntax highlighting

      filetype plugin indent on			" File type detection + language dependent indenting

      let no_buffers_menu=1

      set backspace=indent,eol,start			" Backspace works as expected
      set relativenumber				" Relative line numbers
      set hidden					" Allows hidden buffers

      set cursorline					" Highlight current line

      " Fix terminal color scheme
      set t_Co=256
      " set termguicolors
      let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
      let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
      set background=dark " Setting dark mode

      " Color scheme
      colorscheme deus

      let g:deus_termcolors=256
    '';
    vam.knownPlugins = pkgs.vimPlugins // {
      deus = pkgs.vimUtils.buildVimPlugin {
        name = "deus";
        src = pkgs.fetchFromGitHub {
          owner = "ajmwagar";
          repo = "vim-deus";
          rev = "bd29baa02917d926e68ca880217d17cbb317ac00";
          sha256 = "1sn62nvdjs8i4lvmqj19gyj5k9w588whaylk50xn4y2z57cyf7a7";
        };
      };
    };
    vam.pluginDictionaries = [
      {
        names = [
	  "airline"
          "deus"
          "deoplete-nvim"
	  "haskell-vim"
	  "nerdtree"
	  "neoformat"
          "syntastic"
	  "vim-polyglot"
          "vim-hdevtools"
	  "vim-multiple-cursors"
	];
      }
    ];
  };
}