mio-ops/roles/host_common.nix

# Configuration common to all my servers

{ config, pkgs, lib, ... }:

{

  imports = [
    ./tmux.nix
  ];

  # Common boot settings
  boot = {
    cleanTmpDir = true;   # Clean /tmp on reboot
  };

  # Select internationalisation properties.
  i18n = {
    defaultLocale = "en_AU.UTF-8";   # Set the default locale
  };

  # Set the defaul console properties
  console = {
    keyMap = "us";                    # Set the default console key map
    font   = "ter-powerline-v16Rv";   # Set the default console font
  };

  time.timeZone = "Australia/Brisbane"; # Set your preferred timezone:

  # Set security options:
  security.sudo.enable = true;
  security.sudo.wheelNeedsPassword = false;

  # Configure and install required fonts
  fonts.enableDefaultFonts = true;
  fonts.enableFontDir = true;
  fonts.fonts = with pkgs; [
    powerline-fonts   # Required for Powerline prompts
  ];
  fonts.fontconfig.includeUserConf = false;

  # Adapted from gchristensen and clever
  nix = {
    nixPath = [
      # Ruin the config so we don't accidentally run
      # nixos-rebuild switch on the host
      (let
        cfg = pkgs.writeText "configuration.nix"
          ''
            assert builtins.trace "This system is managed by NixOps." false;
            {}
          '';
      in "nixos-config=${cfg}")

      # Copy the channel version from the deploy host to the target
      "nixpkgs=/run/current-system/nixpkgs"
    ];
    gc = {
      automatic = true;   # Enable Nix garbage collection:
      dates = "weekly";
      options = "--delete-older-than 90d";
    };
    autoOptimiseStore = true;
    extraOptions = ''
      show-trace = true   # Enable --show-trace by default for nix
    '';
  };

  system.extraSystemBuilderCmds = ''
    ln -sv ${pkgs.path} $out/nixpkgs
  '';
  environment.etc.host-nix-channel.source = pkgs.path;

  # Set the system-wide environment
  environment = {
    systemPackages = with pkgs; [
      byobu             # text-based window manager and terminal multiplexer.
      direnv            # A shell extension that manages your environment
      dnsutils          # Bind DNS utilities
      (if config.services.xserver.enable then gitAndTools.gitFull else git) # Distributed version control system
      htop              # interactive process viewer
      hwinfo            # Hardware detection tool
      killall           # kill processes by name
      lshw              # Detailed information on the hardware configuration
      lsof              # list open files
      mosh              # Mobile shell (ssh replacement)
      ncdu              # Disk usage analyzer with an ncurses interface
      nix-index         # A files database for nixpkgs
      #openssl           # A cryptographic library that implements the SSL and TLS protocols
      ripgrep           # Utility that provides usability of The Silver Searcher with the raw speed of grep
      (
        import ../roles/vim.nix
      )
    ];
    variables = {
      EDITOR = [ "vim"];   # Set the default editor
    };
  };

  # Program defaults for all hosts
  programs.zsh = {
    enable = true;
    autosuggestions = {
      enable = true;
    };
    interactiveShellInit = ''
      export TERM="xterm-256color"
      eval "$(direnv hook zsh)"
      test -r ~/.dir_colors && eval $(dircolors ~/.dir_colors)
      export GPG_TTY="$(tty)"
      export SSH_AUTH_SOCK=$(gpgconf --list-dirs agent-ssh-socket)
      gpgconf --launch gpg-agent
    '';
    ohMyZsh = {
      enable = true;
      plugins = [ "git" ];
    };
    promptInit = "source ${pkgs.zsh-powerlevel9k}/share/zsh-powerlevel9k/powerlevel9k.zsh-theme";
  };

  users.defaultUserShell = pkgs.zsh;   # Set the default shell for all users

  # Users common across MIO Ops:
  users.mutableUsers = false;        # Remove any users not defined in here

}