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{
  config,
  lib,
  pkgs,
  inputs,
  ...
}:
with lib; let
  cfg = config.nixfiles.modules.nmap;
in {
  options.nixfiles.modules.nmap.enable = mkEnableOption "Nmap";

  config = mkIf cfg.enable {
    hm = {
      home = {
        file = {
          ".nmap/scripts/vulners/vulners.nse".source = "${inputs.nmap-vulners}/vulners.nse";
          ".nmap/scripts/vulscan/vulscan.nse".source = "${inputs.nmap-vulscan}/vulscan.nse";
        };

        packages = with pkgs; [nmap nmap-formatter];

        activation.regenerateNmapScripts = with pkgs; ''
          ${nmap}/bin/nmap --script-updatedb
        '';
      };

      programs.bash = {
        shellAliases = let
          base = "${pkgs.nmap}/bin/nmap -sV";
        in {
          nmap-vulners = "${base} --script=vulners/vulners.nse";
          nmap-vulscan = "${base} --script=vulscan/vulscan.nse";
        };
        initExtra = mkAfter ''
          _complete_alias nmap-vulners _nmap nmap
          _complete_alias nmap-vulscan _nmap nmap
        '';
      };

      systemd.user = {
        services.update-nmap-vulscan-lists = {
          Service = {
            ExecStart = let
              pkg = with pkgs;
                writeShellApplication {
                  name = "update-nmap-vulscan-lists";
                  runtimeInputs = [curl];
                  text = ''
                    declare -a vulscandbs=(
                      "cve"
                      "exploitdb"
                      "openvas"
                      "osvdb"
                      "scipvuldb"
                      "securityfocus"
                      "securitytracker"
                      "xforce"
                    )
                    for i in "''${vulscandbs[@]}"; do
                      ${curl}/bin/curl \
                        -o "${config.my.home}/.nmap/scripts/vulscan/$i.csv" \
                        "https://www.computec.ch/projekte/vulscan/download/$i.csv"
                    done
                  '';
                };
            in "${pkg}/bin/update-nmap-vulscan-lists";
          };
        };

        timers.update-nmap-vulscan-lists = {
          # TODO Figure out how to check for network-online.target for user
          # timers.
          Timer = {
            OnCalendar = "daily";
            Persistent = true;
            Unit = "update-nmap-vulscan-lists.service";
          };
          Install.WantedBy = ["timers.target"];
        };
      };
    };
  };
}