require -k flag to target kubernetes for annotate command (#1016)

Signed-off-by: Joni Collinge <jonathancollinge@live.com>

Co-authored-by: Mukundan Sundararajan <65565396+mukundansundar@users.noreply.github.com>

README.md

@@ -630,38 +630,40 @@ The default is `false`.
 
 For more details, please run the command and check the examples to apply to your shell.
 
-### Annotate a Kubernetes manifest
+### Apply Dapr annotations
 
-To add or modify dapr annotations on an existing Kubernetes manifest, use the  `dapr annotate` command:
+To add or modify dapr annotations on an existing Kubernetes manifest, use the `dapr annotate` command:
 
 ```bash
 dapr annotate [flags] mydeployment.yaml
 ```
 
 This will add the `dapr.io/enabled` and the `dapr.io/app-id` annotations. The dapr app id will be genereated using the format `<namespace>-<kind>-<name>` where the values are taken from the existing Kubernetes object metadata.
 
+> NOTE: The annotate command currently only supports annotating Kubernetes manifests. You must provide the `-k` flag to target Kubernetes.
+
 To provide your own dapr app id, provide the flag `--app-id`.
 
 All dapr annotations are available to set if a value is provided for the appropriate flag on the `dapr annotate` command.
 
 You can also provide the Kubernetes manifest via stdin:
 
 ```bash
-kubectl get deploy mydeploy -o yaml | dapr annotate - | kubectl apply -f -
+kubectl get deploy mydeploy -o yaml | dapr annotate -k - | kubectl apply -f -
 ```
 
 Or you can provide the Kubernetes manifest via a URL:
 
 ```bash
-dapr annotate --log-level debug https://raw.githubusercontent.com/dapr/quickstarts/master/tutorials/hello-kubernetes/deploy/node.yaml | kubectl apply -f -
+dapr annotate -k --log-level debug https://raw.githubusercontent.com/dapr/quickstarts/master/tutorials/hello-kubernetes/deploy/node.yaml | kubectl apply -f -
 ```
 
 If the input contains multiple manifests then the command will search for the first appropriate one to apply the annotations. If you'd rather it applied to a specific manifest then you can provide the `--resource` flag with the value set to the name of the object you'd like to apply the annotations to. If you have a conflict between namespaces you can also provide the namespace via the `--namespace` flag to isolate the manifest you wish to target.
 
 If you want to annotate multiple manifests, you can chain together the `dapr annotate` commands with each applying the annotation to a specific manifest.
 
 ```bash
-kubectl get deploy -o yaml | dapr annotate -r nodeapp --log-level debug - | dapr annotate --log-level debug -r pythonapp - | kubectl apply -f -
+kubectl get deploy -o yaml | dapr annotate -k -r nodeapp --log-level debug - | dapr annotate -k --log-level debug -r pythonapp - | kubectl apply -f -
 ```
 
 ## Reference for the Dapr CLI

cmd/annotate.go

@@ -71,24 +71,29 @@ var AnnotateCmd = &cobra.Command{
 	Short: "Add dapr annotations to a Kubernetes configuration. Supported platforms: Kubernetes",
 	Example: `
 # Annotate the first deployment found in the input
-kubectl get deploy -l app=node -o yaml | dapr annotate - | kubectl apply -f -
+kubectl get deploy -l app=node -o yaml | dapr annotate -k - | kubectl apply -f -
 
 # Annotate multiple deployments by name in a chain
-kubectl get deploy -o yaml | dapr annotate -r nodeapp - | dapr annotate -r pythonapp - | kubectl apply -f -
+kubectl get deploy -o yaml | dapr annotate -k -r nodeapp - | dapr annotate -k -r pythonapp - | kubectl apply -f -
 
 # Annotate deployment in a specific namespace from file or directory by name
-dapr annotate -r nodeapp -n namespace mydeploy.yaml | kubectl apply -f -
+dapr annotate -k -r nodeapp -n namespace mydeploy.yaml | kubectl apply -f -
 
 # Annotate deployment from url by name
-dapr annotate -r nodeapp --log-level debug https://raw.githubusercontent.com/dapr/quickstarts/master/tutorials/hello-kubernetes/deploy/node.yaml | kubectl apply -f -
+dapr annotate -k -r nodeapp --log-level debug https://raw.githubusercontent.com/dapr/quickstarts/master/tutorials/hello-kubernetes/deploy/node.yaml | kubectl apply -f -
 
 --------------------------------------------------------------------------------
 WARNING: If an app id is not provided, we will generate one using the format '<namespace>-<kind>-<name>'.
 --------------------------------------------------------------------------------
 `,
 	Run: func(cmd *cobra.Command, args []string) {
+		if !kubernetesMode {
+			print.FailureStatusEvent(os.Stderr, "annotate command is only supported for Kubernetes, please provide the -k flag")
+			os.Exit(1)
+		}
+
 		if len(args) < 1 {
-			print.FailureStatusEvent(os.Stderr, "please specify a kubernetes resource file")
+			print.FailureStatusEvent(os.Stderr, "please specify a Kubernetes resource file")
 			os.Exit(1)
 		}
 
@@ -321,6 +326,7 @@ func getOptionsFromFlags() kubernetes.AnnotateOptions {
 }
 
 func init() {
+	AnnotateCmd.Flags().BoolVarP(&kubernetesMode, "kubernetes", "k", false, "Apply annotations to Kubernetes resources")
 	AnnotateCmd.Flags().StringVarP(&annotateTargetResource, "resource", "r", "", "The resource to target to annotate")
 	AnnotateCmd.Flags().StringVarP(&annotateTargetNamespace, "namespace", "n", "", "The namespace the resource target is in (can only be set if --resource is also set)")
 	AnnotateCmd.Flags().StringVarP(&annotateAppID, "app-id", "a", "", "The app id to annotate")