Support providing k8s native resource through --objects flag in kanctl (

#638)

* Support providing k8s native resource through
--objects flag in kanctl command, while creating
actionset.
For ex
```
kanctl create actionset \
--action backup \
--namespace kanister \
--blueprint etcd-blueprint \
--objects /v1/pods/kube-system/etcd-minikube \
--profile kube-system/s3-profile-xhgl9
```

* Use format v1/resources/namespace/name to provide resources from core api group

* Add test for parseGenericObjectRef

* Fix golint

Co-authored-by: Pavan Navarathna <pavan@kasten.io>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/kanctl/actionset.go

@@ -430,10 +430,10 @@ func parseGenericObjects(objs []string) ([]crv1alpha1.ObjectReference, error) {
 
 func parseGenericObjectReference(s string) (crv1alpha1.ObjectReference, error) {
 	// Looking for group/version/resource/namespace/name
-	reg := regexp.MustCompile(`([\w-.]+)/([\w-.]+)/([\w-.]+)/([\w-.]+)/([\w-.]+)`)
+	reg := regexp.MustCompile(`([\w-.]*/)*([\w-.]+)/([\w-.]+)/([\w-.]+)/([\w-.]+)`)
 	m := reg.FindStringSubmatch(s)
-	if len(m) != 6 {
-		return crv1alpha1.ObjectReference{}, errors.Errorf("Expected group/version/resource/namespace/name. Got %s %d", s, len(m))
+	if len(m) != 6 && len(m) != 5 {
+		return crv1alpha1.ObjectReference{}, errors.Errorf("Expected group/version/resource/namespace/name or in the case of core group's resources version/resource/namespace/name . Got %s %d", s, len(m))
 	}
 	return crv1alpha1.ObjectReference{
 		Group:      m[1],

pkg/kanctl/actionset_test.go

@@ -0,0 +1,78 @@
+// Copyright 2020 The Kanister Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package kanctl
+
+import (
+	"testing"
+
+	. "gopkg.in/check.v1"
+
+	crv1alpha1 "github.com/kanisterio/kanister/pkg/apis/cr/v1alpha1"
+)
+
+type KanctlTestSuite struct{}
+
+var _ = Suite(&KanctlTestSuite{})
+
+func Test(t *testing.T) { TestingT(t) }
+
+func (k *KanctlTestSuite) TestParseGenericObjectReference(c *C) {
+	for _, tc := range []struct {
+		objectFlag string
+		expected   crv1alpha1.ObjectReference
+		err        Checker
+	}{
+		// not core group
+		{
+			objectFlag: "apps/v1/deployments/namespace/name",
+			expected: crv1alpha1.ObjectReference{
+				APIVersion: "v1",
+				Group:      "apps/",
+				Resource:   "deployments",
+				Name:       "name",
+				Namespace:  "namespace",
+			},
+			err: IsNil,
+		},
+		// core group
+		{
+			objectFlag: "v1/pods/kube-system/etcd-minikube ",
+			expected: crv1alpha1.ObjectReference{
+				APIVersion: "v1",
+				Group:      "",
+				Resource:   "pods",
+				Name:       "etcd-minikube",
+				Namespace:  "kube-system",
+			},
+			err: IsNil,
+		},
+		// CRs
+		{
+			objectFlag: "cr.kanister.io/v1alpha1/profiles/kanister/s3-profile-5fx9w",
+			expected: crv1alpha1.ObjectReference{
+				APIVersion: "v1alpha1",
+				Group:      "cr.kanister.io/",
+				Resource:   "profiles",
+				Name:       "s3-profile-5fx9w",
+				Namespace:  "kanister",
+			},
+			err: IsNil,
+		},
+	} {
+		a, err := parseGenericObjectReference(tc.objectFlag)
+		c.Check(err, tc.err)
+		c.Assert(a, DeepEquals, tc.expected)
+	}
+}