Show all revisions when run service describe -v (#790)

* The `kn service describe -v` command shows repetitive revisions, because
  the revision would be covered by next one.

CHANGELOG.adoc

@@ -18,6 +18,10 @@
 |===
 | | Description | PR
 
+| 🐛
+| Service describe command shows repetitive revisions
+| https://github.com/knative/client/pull/790[#790]
+
 | 🎁
 | Add concurrency-utilization option for `service create` and `service update` (`--concurrency-utilization`)
 | https://github.com/knative/client/pull/788[#788]

pkg/kn/commands/service/describe.go

@@ -267,7 +267,7 @@ func getRevisionDescriptions(client clientservingv1.KnServingClient, service *se
 			return nil, fmt.Errorf("cannot extract revision from service %s: %v", service.Name, err)
 		}
 		revisionsSeen.Insert(revision.Name)
-		desc, err := newRevisionDesc(revision, &target, service)
+		desc, err := newRevisionDesc(*revision, &target, service)
 		if err != nil {
 			return nil, err
 		}
@@ -302,7 +302,7 @@ func completeWithLatestRevisions(client clientservingv1.KnServingClient, service
 		if err != nil {
 			return nil, err
 		}
-		newDesc, err := newRevisionDesc(rev, nil, service)
+		newDesc, err := newRevisionDesc(*rev, nil, service)
 		if err != nil {
 			return nil, err
 		}
@@ -321,7 +321,7 @@ func completeWithUntargetedRevisions(client clientservingv1.KnServingClient, ser
 			continue
 		}
 		revisionsSeen.Insert(revision.Name)
-		newDesc, err := newRevisionDesc(&revision, nil, service)
+		newDesc, err := newRevisionDesc(revision, nil, service)
 		if err != nil {
 			return nil, err
 		}
@@ -331,13 +331,13 @@ func completeWithUntargetedRevisions(client clientservingv1.KnServingClient, ser
 	return descs, nil
 }
 
-func newRevisionDesc(revision *servingv1.Revision, target *servingv1.TrafficTarget, service *servingv1.Service) (*revisionDesc, error) {
+func newRevisionDesc(revision servingv1.Revision, target *servingv1.TrafficTarget, service *servingv1.Service) (*revisionDesc, error) {
 	generation, err := strconv.ParseInt(revision.Labels[serving.ConfigurationGenerationLabelKey], 0, 0)
 	if err != nil {
 		return nil, fmt.Errorf("cannot extract configuration generation for revision %s: %v", revision.Name, err)
 	}
 	revisionDesc := revisionDesc{
-		revision:                revision,
+		revision:                &revision,
 		configurationGeneration: int(generation),
 		latestCreated:           revision.Name == service.Status.LatestCreatedRevisionName,
 		latestReady:             revision.Name == service.Status.LatestReadyRevisionName,

pkg/kn/commands/service/describe_test.go

@@ -432,28 +432,31 @@ func TestServiceDescribeVerbose(t *testing.T) {
 	r := client.Recorder()
 
 	// Prepare service
-	expectedService := createTestService("foo", []string{"rev1", "rev2"}, goodConditions())
+	expectedService := createTestService("foo", []string{"rev1", "rev2", "rev3"}, goodConditions())
+	expectedService.Status.Traffic = expectedService.Status.Traffic[2:]
+	expectedService.Status.Traffic[0].LatestRevision = ptr.Bool(true)
+	expectedService.Status.Traffic[0].Percent = ptr.Int64(int64(100))
 	r.GetService("foo", &expectedService, nil)
 
 	rev1 := createTestRevision("rev1", 1)
 	rev2 := createTestRevision("rev2", 2)
+	rev3 := createTestRevision("rev3", 3)
 
 	revList := servingv1.RevisionList{
 		TypeMeta: metav1.TypeMeta{
 			Kind:       "RevisionList",
 			APIVersion: "serving.knative.dev/v1",
 		},
 		Items: []servingv1.Revision{
-			rev1, rev2,
+			rev1, rev2, rev3,
 		},
 	}
 
 	// Return the list of all revisions
 	r.ListRevisions(knclient.HasLabelSelector(api_serving.ServiceLabelKey, "foo"), &revList, nil)
 
 	// Fetch the revisions
-	r.GetRevision("rev1", &rev1, nil)
-	r.GetRevision("rev2", &rev2, nil)
+	r.GetRevision("rev3", &rev3, nil)
 
 	// Testing:
 	output, err := executeServiceCommand(client, "describe", "foo", "--verbose")
@@ -462,12 +465,16 @@ func TestServiceDescribeVerbose(t *testing.T) {
 	validateServiceOutput(t, "foo", output)
 
 	assert.Assert(t, cmp.Regexp("Cluster:\\s+https://foo.default.svc.cluster.local", output))
-	assert.Assert(t, util.ContainsAll(output, "Image", "Name", "gcr.io/test/image (at 123456)", "50%", "(0s)"))
+	assert.Assert(t, util.ContainsAll(output, "Image", "Name", "gcr.io/test/image (at 123456)", "100%", "(0s)"))
 	assert.Assert(t, util.ContainsAll(output, "Env:", "env1=eval1\n", "env2=eval2\n"))
 	assert.Assert(t, util.ContainsAll(output, "EnvFrom:", "cm:test1\n", "cm:test2\n"))
 	assert.Assert(t, util.ContainsAll(output, "Annotations:", "anno1=aval1\n", "anno2=aval2\n"))
 	assert.Assert(t, util.ContainsAll(output, "Labels:", "label1=lval1\n", "label2=lval2\n"))
 	assert.Assert(t, util.ContainsAll(output, "[1]", "[2]"))
+	assert.Assert(t, util.ContainsAll(output, "rev1", "rev2", "rev3"))
+	assert.Equal(t, strings.Count(output, "rev3"), 1)
+	assert.Equal(t, strings.Count(output, "rev2"), 1)
+	assert.Equal(t, strings.Count(output, "rev1"), 1)
 
 	// Validate that all recorded API methods have been called
 	r.Validate()