Print generate output cli (#11634)

* refactor: Configure the policy processor to print generated resources

Refactor printMutatedOutput to printOutput which prints mutate or generate resources to a file or standard output
Introduce processGenerateResponse which extracts generated resources from the policy response and passes them to printOutput

Signed-off-by: aerosouund <aerosound161@gmail.com>

* chore: Update flag description to specify mutated and generated resources

Signed-off-by: aerosouund <aerosound161@gmail.com>

* chore: Run codegen

Signed-off-by: aerosouund <aerosound161@gmail.com>

---------

Signed-off-by: aerosouund <aerosound161@gmail.com>

cmd/cli/kubectl-kyverno/commands/apply/command.go

@@ -135,7 +135,7 @@ func Command() *cobra.Command {
 	cmd.Flags().StringSliceVarP(&applyCommandConfig.ResourcePaths, "resource", "r", []string{}, "Path to resource files")
 	cmd.Flags().StringSliceVarP(&applyCommandConfig.ResourcePaths, "resources", "", []string{}, "Path to resource files")
 	cmd.Flags().BoolVarP(&applyCommandConfig.Cluster, "cluster", "c", false, "Checks if policies should be applied to cluster in the current context")
-	cmd.Flags().StringVarP(&applyCommandConfig.MutateLogPath, "output", "o", "", "Prints the mutated resources in provided file/directory")
+	cmd.Flags().StringVarP(&applyCommandConfig.MutateLogPath, "output", "o", "", "Prints the mutated/generated resources in provided file/directory")
 	// currently `set` flag supports variable for single policy applied on single resource
 	cmd.Flags().StringVarP(&applyCommandConfig.UserInfoPath, "userinfo", "u", "", "Admission Info including Roles, Cluster Roles and Subjects")
 	cmd.Flags().StringSliceVarP(&applyCommandConfig.Variables, "set", "s", nil, "Variables that are required")

cmd/cli/kubectl-kyverno/processor/policy_processor.go

@@ -203,6 +203,9 @@ func (p *PolicyProcessor) ApplyPoliciesOnResource() ([]engineapi.EngineResponse,
 				} else {
 					generateResponse.PolicyResponse.Rules = newRuleResponse
 				}
+				if err := p.processGenerateResponse(generateResponse, resPath); err != nil {
+					return responses, err
+				}
 				responses = append(responses, generateResponse)
 			}
 			p.Rc.addGenerateResponse(generateResponse)
@@ -342,37 +345,61 @@ func (p *PolicyProcessor) makePolicyContext(
 	return policyContext, nil
 }
 
-func (p *PolicyProcessor) processMutateEngineResponse(response engineapi.EngineResponse, resourcePath string) error {
-	printMutatedRes := p.Rc.addMutateResponse(response)
-	if printMutatedRes && p.PrintPatchResource {
-		yamlEncodedResource, err := yamlv2.Marshal(response.PatchedResource.Object)
+func (p *PolicyProcessor) processGenerateResponse(response engineapi.EngineResponse, resourcePath string) error {
+	generatedResources := []*unstructured.Unstructured{}
+	for _, rule := range response.PolicyResponse.Rules {
+		gen := rule.GeneratedResources()
+		generatedResources = append(generatedResources, gen...)
+	}
+	for _, r := range generatedResources {
+		err := p.printOutput(r.Object, response, resourcePath, true)
 		if err != nil {
-			return fmt.Errorf("failed to marshal (%w)", err)
-		}
-
-		if p.MutateLogPath == "" {
-			mutatedResource := string(yamlEncodedResource) + string("\n---")
-			if len(strings.TrimSpace(mutatedResource)) > 0 {
-				if !p.Stdin {
-					fmt.Fprintf(p.Out, "\nmutate policy %s applied to %s:", response.Policy().GetName(), resourcePath)
-				}
-				fmt.Fprintf(p.Out, "\n"+mutatedResource+"\n") //nolint:govet
-			}
-		} else {
-			err := p.printMutatedOutput(string(yamlEncodedResource))
-			if err != nil {
-				return fmt.Errorf("failed to print mutated result (%w)", err)
-			}
-			fmt.Fprintf(p.Out, "\n\nMutation:\nMutation has been applied successfully. Check the files.")
+			return fmt.Errorf("failed to print generate result (%w)", err)
 		}
+		fmt.Fprintf(p.Out, "\n\nGenerate:\nGeneration completed successfully.")
 	}
 	return nil
 }
 
-func (p *PolicyProcessor) printMutatedOutput(yaml string) error {
+func (p *PolicyProcessor) processMutateEngineResponse(response engineapi.EngineResponse, resourcePath string) error {
+	p.Rc.addMutateResponse(response)
+	err := p.printOutput(response.PatchedResource.Object, response, resourcePath, false)
+	if err != nil {
+		return fmt.Errorf("failed to print mutated result (%w)", err)
+	}
+	fmt.Fprintf(p.Out, "\n\nMutation:\nMutation has been applied successfully.")
+	return nil
+}
+
+func (p *PolicyProcessor) printOutput(resource interface{}, response engineapi.EngineResponse, resourcePath string, isGenerate bool) error {
+	yamlEncodedResource, err := yamlv2.Marshal(resource)
+	if err != nil {
+		return fmt.Errorf("failed to marshal (%w)", err)
+	}
+
+	if p.MutateLogPath == "" {
+		resource := string(yamlEncodedResource) + string("\n---")
+		if len(strings.TrimSpace(resource)) > 0 {
+			if !p.Stdin {
+				fmt.Fprintf(p.Out, "\npolicy %s applied to %s:", response.Policy().GetName(), resourcePath)
+			}
+			fmt.Fprintf(p.Out, "\n"+resource+"\n") //nolint:govet
+		}
+		return nil
+	}
+
 	var file *os.File
 	mutateLogPath := filepath.Clean(p.MutateLogPath)
 	filename := p.Resource.GetName() + "-mutated"
+	if isGenerate {
+		filename = response.Policy().GetName() + "-generated"
+	}
+
+	file, err = os.OpenFile(filepath.Join(mutateLogPath, filename+".yaml"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o600) // #nosec G304
+	if err != nil {
+		return err
+	}
+
 	if !p.MutateLogPathIsDir {
 		// truncation for the case when mutateLogPath is a file (not a directory) is handled under pkg/kyverno/apply/test_command.go
 		f, err := os.OpenFile(mutateLogPath, os.O_APPEND|os.O_WRONLY, 0o600) // #nosec G304
@@ -380,14 +407,8 @@ func (p *PolicyProcessor) printMutatedOutput(yaml string) error {
 			return err
 		}
 		file = f
-	} else {
-		f, err := os.OpenFile(filepath.Join(mutateLogPath, filename+".yaml"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o600) // #nosec G304
-		if err != nil {
-			return err
-		}
-		file = f
 	}
-	if _, err := file.Write([]byte(yaml + "\n---\n\n")); err != nil {
+	if _, err := file.Write([]byte(string(yamlEncodedResource) + "\n---\n\n")); err != nil {
 		if err := file.Close(); err != nil {
 			log.Log.Error(err, "failed to close file")
 		}

docs/user/cli/commands/kyverno_apply.md

@@ -51,7 +51,7 @@ kyverno apply [flags]
   -h, --help                               help for apply
       --kubeconfig string                  path to kubeconfig file with authorization and master location information
   -n, --namespace string                   Optional Policy parameter passed with cluster flag
-  -o, --output string                      Prints the mutated resources in provided file/directory
+  -o, --output string                      Prints the mutated/generated resources in provided file/directory
   -p, --policy-report                      Generates policy report when passed (default policyviolation)
       --registry                           If set to true, access the image registry using local docker credentials to populate external data
       --remove-color                       Remove any color from output