nixos-config/home-manager/roles/mail2rss.nix

{
  lib,
  pkgs,
  config,
  ...
}: let
  mail2rss = pkgs.writeHaskellScript
  {
    name = "mail2rss";
    bins = [pkgs.notmuch pkgs.mblaze pkgs.isync pkgs.logfeed];
    imports = ["System.Environment (setEnv)"];
  } ''
    main = do
       setEnv "NOTMUCH_CONFIG" "${
      config.home.sessionVariables.NOTMUCH_CONFIG or ""
    }"
       mbsync "-a"
       notmuch "new" "--quiet"
       mail2rss "${config.accounts.email.maildirBasePath}" "hera/Move/readlater" &> Truncate "/var/www/rss/mails2.xml"
       files <- notmuch "search" "--output" "files" "folder:hera/Move/readlater" |> capture
       writeOutput files |> mrefile "${config.accounts.email.maildirBasePath}/hera/Archiv/unsortiert"
       mbsync "-a"
       notmuch "new" "--quiet"
  '';
in {
  systemd.user = {
    timers.mail2rss = {
      Timer.OnCalendar = "19:58";
      Install.WantedBy = ["timers.target"];
    };
    services = {
      mail2rss = {
        Unit.Description = "Mail to rss exporter";
        Service = {
          ExecStart = "${mail2rss}/bin/mail2rss";
          Type = "oneshot";
        };
      };
    };
  };
}