// - Exact: match a request only if it exactly matches a specified rule.
  // For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,
  // a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the webhook.
  //

  // - Exact: match a request only if it exactly matches a specified rule.
  // For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,
  // a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the webhook.
  //

		grep -Pv '^k8s.io/(utils|klog|apimachinery)/' |\
		grep -Pv 'envoy/type/|envoy/annotations|envoy/config/core/' |\
		grep -Pv 'envoy/extensions/transport_sockets/tls/' |\
		grep -Pv 'envoy/service/discovery/v3' |\
		grep -Pv 'envoy/extensions/wasm/' |\
		grep -Pv 'envoy/extensions/filters/(http|network)/wasm/' |\
		grep -Pv 'istio\.io/api/(annotation|label|mcp|mesh|networking|security/v1alpha1|type)' |\

    - injects the CNI plugin config to the CNI config file
        - CNI installer will try to look for the config file under the mounted CNI net dir based on file name extensions (`.conf`, `.conflist`)
        - the file name can be explicitly set by `CNI_CONF_NAME` env var
        - the program inserts `CNI_NETWORK_CONFIG` into the `plugins` list in `/etc/cni/net.d/${CNI_CONF_NAME}`

  // the selector.  Failure to pick a unique label may cause this
  // and other jobs to not function correctly.  However, You may see
  // `manualSelector=true` in jobs that were created with the old `extensions/v1beta1`
  // API.
  // More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/#specifying-your-own-pod-selector
  // +optional
  optional bool manualSelector = 5;

			if err != nil {
				return nil, err
			}
			readers = append(readers, dirReaders...)
		} else {
			if !isValidFile(f) {
				fmt.Fprintf(cmd.ErrOrStderr(), "Skipping file %v, recognized file extensions are: %v\n", f, fileExtensions)
				continue
			}
			rs, err := gatherFile(f)
			if err != nil {
				return nil, err
			}
			readers = append(readers, rs)
		}
	}
	return readers, nil
}

  //  2. Permitted subjects: and behavior when a disallowed subject is requested.
  //  3. Required, permitted, or forbidden x509 extensions in the request (including whether subjectAltNames are allowed, which types, restrictions on allowed values) and behavior when a disallowed extension is requested.
  //  4. Required, permitted, or forbidden key usages / extended key usages.

		Use:     "ecds [<type>/]<name>[.<namespace>]",
		Aliases: []string{"ec"},
		Short:   "Retrieves typed extension configuration for the Envoy in the specified pod",
		Long:    `Retrieve information about typed extension configuration for the Envoy instance in the specified pod.`,
		Example: `  # Retrieve full typed extension configuration for a given pod from Envoy.
  istioctl proxy-config ecds <pod-name[.namespace]>

  // single TLS port, 443. If multiple members of this list specify different hosts,
  // they will be multiplexed on the same port according to the hostname specified
  // through the SNI TLS extension, if the ingress controller fulfilling the
  // ingress supports SNI.
  // +optional
  repeated IngressTLS tls = 2;

  // rules is a list of host rules used to configure the Ingress. If unspecified, or

  // single TLS port, 443. If multiple members of this list specify different hosts,
  // they will be multiplexed on the same port according to the hostname specified
  // through the SNI TLS extension, if the ingress controller fulfilling the
  // ingress supports SNI.
  // +listType=atomic
  // +optional
  repeated IngressTLS tls = 2;