{ config, pkgs, ... }:

{
  systemd.services.yate = {
    enable = true;
    description = "Yate telehony engine";
    unitConfig = {
      Type = "simple";
      After="network.target";
    };
    serviceConfig = {
      ExecStart = "${pkgs.yate}/bin/yate -c /etc/yate -e /etc/yate/share -Do";
      Type="simple";
      Restart="always";
      Group="yate-config";
      StateDirectory = "yate";
      StateDirectoryMode = "0775";
      # ...
    };
    wantedBy = [ "default.target" ];
    requiredBy = [ "network.target" ]; 
    preStart = "if ! [ -d \"/var/lib/yate/.git\" ]
                then
                ${pkgs.git}/bin/git init /var/lib/yate
                ${pkgs.git}/bin/git -C /var/lib/yate remote add origin forgejo@git.hamburg.ccc.de:echtnurich/yate-config.git
                ${pkgs.git}/bin/git -C /var/lib/yate pull -f --set-upstream
                echo \"New repo set up.\"
                fi
                ${pkgs.git}/bin/git -C /var/lib/yate fetch --all
                ${pkgs.git}/bin/git -C /var/lib/yate checkout --track -f origin/master";
    # ...
  };
}