h.cf

bundle agent main
{

  methods:
    "init" usebundle => init;

    "test" usebundle => test;
}

bundle agent init
{
  files:
    "$(this.promise_dirname)/seadragon-4.28.0-service.zip"
      create => "true";
}

bundle agent test
{
  vars:
    "standalone_directory_listing"
      slist => lsdir("$(this.promise_dirname)","seadragon.*","false");

    "standalone_directory_string"
      string => nth(standalone_directory_listing, 0);

    "new_SD_version"
      data => data_regextract("seadragon-(?<capture>.*)-service.zip", $(standalone_directory_string) );

  reports:
    "Note how new_SD_version iterates:";
    "$(new_SD_version)";

    "If you only want the named capture: $(new_SD_version[capture])";
}