feat: support skipping api version

Readme.md

@@ -122,7 +122,7 @@ Usage: ./bin/kubeconform [OPTION]... [FILE OR FOLDER]...
   -schema-location value
         override schemas location search path (can be specified multiple times)
   -skip string
-        comma-separated list of kinds or GVKs to ignore
+        comma-separated list of kinds, api versions or GVKs to ignore
   -strict
         disallow additional properties not in schema or duplicated keys
   -summary

pkg/validator/validator.go

@@ -48,7 +48,7 @@ type Opts struct {
 	SkipKinds            map[string]struct{} // List of resource Kinds to ignore
 	RejectKinds          map[string]struct{} // List of resource Kinds to reject
 	KubernetesVersion    string              // Kubernetes Version - has to match one in https://github.com/instrumenta/kubernetes-json-schema
-	Strict               bool                // thros an error if resources contain undocumented fields
+	Strict               bool                // throws an error if resources contain undocumented fields
 	IgnoreMissingSchemas bool                // skip a resource if no schema for that resource can be found
 }
 
@@ -104,6 +104,9 @@ func (val *v) ValidateResource(res resource.Resource) Result {
 	// for skipping/rejecting resources) and the raw Kind.
 
 	skip := func(signature resource.Signature) bool {
+		if _, ok := val.opts.SkipKinds[signature.Version]; ok {
+			return ok
+		}
 		if _, ok := val.opts.SkipKinds[signature.GroupVersionKind()]; ok {
 			return ok
 		}

pkg/validator/validator_test.go

@@ -379,3 +379,37 @@ lastName: bar
 		}
 	}
 }
+
+func TestValidateSkip(t *testing.T) {
+	resource := resource.Resource{Bytes: []byte(`
+apiVersion: random.vendor/v1alpha3
+kind: SomeKind
+firstName: foo
+lastName: bar`)}
+
+	for _, testCase := range []struct {
+		name       string
+		skipOption string
+	}{
+		{"skip kind", "SomeKind"},
+		{"skip version/kind", "random.vendor/v1alpha3/SomeKind"},
+		{"skip apiVersion", "random.vendor/v1alpha3"},
+	} {
+
+		validator := v{
+			opts: Opts{
+				SkipKinds: map[string]struct{}{testCase.skipOption: {}},
+			},
+			schemaDownload: downloadSchema,
+		}
+
+		result := validator.ValidateResource(resource)
+		if result.Status != Skipped {
+			if result.Err != nil {
+				t.Errorf("Test '%s' - expected %d, got %d: %s", testCase.name, Skipped, result.Status, result.Err.Error())
+			} else {
+				t.Errorf("Test '%s' - expected %d, got %d", testCase.name, Skipped, result.Status)
+			}
+		}
+	}
+}