referring to control plane revisions for sidecar injection.

With revision tags, rather than relabeling a namespace from "istio.io/rev=revision-a" to "istio.io/rev=revision-b" to
change which control plane revision handles injection, it's possible to create a revision tag "prod" and label our
namespace "istio.io/rev=prod". The "prod" revision tag could point to "1-7-6" initially and then be changed to point to "1-8-1"
at some later point.

10.10.10.11 istiod-rev-1.istio-system.svc...

				"--internalIP", testCases[dir.Name()]["internalIP"],
				"--ingressIP", testCases[dir.Name()]["ingressIP"],
				"--clusterID", constants.DefaultClusterName,
				"--revision", "rev-1",
				"-o", testdir,
			}
			if _, err := runTestCmd(t, createClientFunc, "rev-1", cmdWithClusterID); err != nil {
				t.Fatal(err)
			}

			cmdNoClusterID := []string{
				"entry", "configure",

fd00:10:96::2 istiod-rev-1.istio-system.svc...

        val rootProjectDir: DirectoryProperty
        val rootProjectBuildDir: DirectoryProperty
    }

    @get:Inject
    abstract val providers: ProviderFactory

    val gitCommitId = git("rev-parse", "HEAD")
    val gitBranch = git("rev-parse", "--abbrev-ref", "HEAD")

    @Suppress("UnstableApiUsage")
    private
    fun git(vararg args: String): Provider<String> {
        val projectDir = parameters.rootProjectDir.asFile.get()

					}
				}()
			}
			var valuesConfig string
			var sidecarTemplate inject.RawTemplates
			var meshConfig *meshconfig.MeshConfig
			rev := opts.Revision
			// if the revision is "default", render templates with an empty revision
			if rev == util.DefaultRevisionName {
				rev = ""
			}
			injectorAddress := centralOpts.Xds
			index := strings.IndexByte(injectorAddress, ':')
			if index != -1 {

NAMESPACE     NAME                   REVISION     PROGRAMMED
bookinfo      bookinfo-rev           rev1         True
bookinfo      bookinfo-valid         default      True
default       bookinfo               default      False
default       no-name-convention     default      True

func tagWebhookConfigFromCanonicalWebhook(wh admitv1.MutatingWebhookConfiguration, tagName, istioNS string) (*tagWebhookConfig, error) {
	rev, err := GetWebhookRevision(wh)
	if err != nil {
		return nil, err
	}
	// if the revision is "default", render templates with an empty revision
	if rev == DefaultRevisionName {
		rev = ""
	}

	var injectionURL, caBundle, path string
	found := false
	for _, w := range wh.Webhooks {

defaultConfig:
  discoveryAddress: istiod-rev-1.istio-system.svc:15012
  proxyMetadata:
    CANONICAL_REVISION: latest
    CANONICAL_SERVICE: foo
    CLUSTER_MESH_CONFIG_VALUE: foo
    ISTIO_META_CLUSTER_ID: Kubernetes
    ISTIO_META_DNS_CAPTURE: "true"
    ISTIO_META_MESH_ID: ""
    ISTIO_META_NETWORK: ""
    ISTIO_META_WORKLOAD_NAME: foo
    ISTIO_METAJSON_LABELS: '{"service.istio.io/canonical-name":"foo","service.istio.io/canonical-revision":"latest"}'

defaultConfig:
  discoveryAddress: istiod-rev-1.istio-system.svc:15012
  proxyMetadata:
    CANONICAL_REVISION: latest
    CANONICAL_SERVICE: foo
    CLUSTER_MESH_CONFIG_VALUE: foo
    ISTIO_META_CLUSTER_ID: Kubernetes
    ISTIO_META_DNS_CAPTURE: "true"
    ISTIO_META_MESH_ID: ""
    ISTIO_META_NETWORK: ""
    ISTIO_META_WORKLOAD_NAME: foo
    ISTIO_METAJSON_LABELS: '{"service.istio.io/canonical-name":"foo","service.istio.io/canonical-revision":"latest"}'