linuxlab.nix/machines/nfs/wol.nix

{ pkgs, lib, ... }:

with lib;

let
  awol = pkgs.writers.writeBashBin "awol" ''
    set -o errexit
    set -o nounset
    set -o pipefail
    
    ${concatMapStringsSep "\n\n"
      ({ name, value }: ''
        echo "Waking up client ${name}"
        ${pkgs.wakelan}/bin/wakelan \
          -b 10.32.44.255 \
          -m '${value.wol}'
      '')
      (attrsToList (import ../../clients.nix))}
  '';
in
{
  users.users."root".packages = [
    awol
  ];

  systemd.services."awol" = {
    description = "Prevent nodes from going AWOL";

    wants = [ "network.target" ];
    after = [ "network.target" ];

    script = "exec ${awol}/bin/awol";

    startAt = "minutely";
  };
}