feat: delete managed fields

pkg/artifacts/artifacts.go

@@ -3,6 +3,7 @@ package artifacts
 import (
 	"github.com/aquasecurity/trivy-kubernetes/pkg/k8s"
 	"github.com/aquasecurity/trivy-kubernetes/pkg/k8s/docker"
+	"github.com/aquasecurity/trivy-kubernetes/utils"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 )
 
@@ -41,6 +42,12 @@ func FromResource(resource unstructured.Unstructured, serverAuths map[string]doc
 		}
 	}
 
+	// delete managed fields from the resource
+	err := utils.DeleteManagedFields(&resource)
+	if err != nil {
+		return nil, err
+	}
+
 	// we don't check found here, if the name is not found it will be an empty string
 	name, _, err := unstructured.NestedString(resource.Object, "metadata", "name")
 	if err != nil {

utils/managed_fields.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+)
+
+func DeleteManagedFields(resource *unstructured.Unstructured) error {
+	// Check if the "metadata" field exists
+
+	metadata, metadataExists, err := unstructured.NestedMap(resource.Object, "metadata")
+	if err != nil {
+		return err
+	}
+
+	// If the "metadata" field exists, check if the "managedFields" field exists
+
+	if metadataExists {
+		_, managedFieldsExists, err := unstructured.NestedSlice(metadata, "managedFields")
+		if err != nil {
+			return err
+		}
+
+		// If the "managedFields" field exists, delete it
+		if managedFieldsExists {
+			delete(metadata, "managedFields")
+
+			// Update the "metadata" field in the original object
+			err = unstructured.SetNestedMap(resource.Object, metadata, "metadata")
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}