# mapped to network1. The gateway for this network example is specified by its public IP
    # address and port.
    # The second network, `network2`, in this example is defined differently with all endpoints
    # retrieved through the specified Multi-Cluster registry being mapped to network2. The
    # gateway is also defined differently with the name of the gateway service on the remote

    # not an official release or release candidate, so get the commit sha
    SHA=$(echo "${SHA}" | awk -F '-' '{ print $NF }')
  fi
fi

if [ -z "${SHA}" ]; then
  fail "Unable to retrieve the commit SHA of istio/api from go.mod file. Not updating the CRD file. Please make sure istio/api exists in the Go module.";
fi

git clone  "https://${REPO}" "${API_TMP}" && cd "${API_TMP}"
git checkout "${SHA}"

    # mapped to network1. The gateway for this network example is specified by its public IP
    # address and port.
    # The second network, `network2`, in this example is defined differently with all endpoints
    # retrieved through the specified Multi-Cluster registry being mapped to network2. The
    # gateway is also defined differently with the name of the gateway service on the remote

	common := new(commonFlags)
	cmd := &cobra.Command{
		Use:   "certificate",
		Short: "Retrieves certificate for the specified Ztunnel pod.",
		Long:  `Retrieve information about certificates for the Ztunnel instance.`,
		Example: `  # Retrieve summary about workload configuration for a randomly chosen ztunnel.
  istioctl x ztunnel-config certificates

  # Retrieve full certificate dump of workloads for a given Ztunnel instance.

}

func registerEnvironment[T env.Parseable](name string, defaultValue T, usage string) {
	envName := strings.Replace(strings.ToUpper(name), "-", "_", -1)
	// Note: we do not rely on istio env package to retrieve configuration. We relies on viper.
	// This is just to make sure the reference doc tool can generate doc with these vars as env variable at istio.io.
	env.Register(envName, defaultValue, usage)
	bindViper(name)
}