code: def _update_system_file(system_file, name, new_kvs):
      
      if os.path.exists(system_file):
          bak_file = system_file + ".bak%s" % datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
          shutil.copyfile(system_file, bak_file)
          with open(system_file) as in_handle:
              config = yaml.safe_load(in_handle)
      else:
          utils.safe_makedir(os.path.dirname(system_file))
          config = {}
      new_rs = {}
      added = False
      for rname, r_kvs in config.get("resources", {}).items():
          if rname == name:
              for k, v in new_kvs.items():
                  r_kvs[k] = v
              added = True
          new_rs[rname] = r_kvs
      if not added:
          new_rs[name] = new_kvs
      config["resources"] = new_rs
      with open(system_file, "w") as out_handle:
          yaml.safe_dump(config, out_handle, default_flow_style=False, allow_unicode=False)
docs: Update the bcbio_system.yaml file with new resource information.