Add machine-readable output for broker

CHANGELOG.adoc

@@ -27,6 +27,11 @@
 | https://github.com/knative/client/pull/1118[#1118]
 |===
 
+| 🎁
+| Add machine readable output (-o flag) to kn broker describe
+| https://github.com/knative/client/pull/1124[#1124]
+|===
+
 ### v0.19.0 (2020-11-11)
 [cols="1,10,3", options="header", width="100%"]
 |===

docs/cmd/kn_broker_describe.md

@@ -20,6 +20,9 @@ kn broker describe NAME
   # Describe broker 'mybroker' in the 'myproject' namespace
   kn broker describe mybroker --namespace myproject
 
+  # Describe broker 'mybroker' in YAML format
+  kn broker describe mybroker -o yaml
+
   # Print only broker URL
   kn broker describe mybroker -o url
 ```

pkg/eventing/v1beta1/client.go

@@ -225,11 +225,15 @@ func (c *knEventingClient) CreateBroker(broker *v1beta1.Broker) error {
 
 // GetBroker is used to get an instance of broker
 func (c *knEventingClient) GetBroker(name string) (*v1beta1.Broker, error) {
-	trigger, err := c.client.Brokers(c.namespace).Get(context.TODO(), name, apis_v1.GetOptions{})
+	broker, err := c.client.Brokers(c.namespace).Get(context.TODO(), name, apis_v1.GetOptions{})
 	if err != nil {
 		return nil, kn_errors.GetError(err)
 	}
-	return trigger, nil
+	err = updateEventingGVK(broker)
+	if err != nil {
+		return nil, err
+	}
+	return broker, nil
 }
 
 // WatchBroker is used to create watcher object

pkg/kn/commands/broker/describe.go

@@ -39,6 +39,9 @@ var describeExample = `
   # Describe broker 'mybroker' in the 'myproject' namespace
   kn broker describe mybroker --namespace myproject
 
+  # Describe broker 'mybroker' in YAML format
+  kn broker describe mybroker -o yaml
+
   # Print only broker URL
   kn broker describe mybroker -o url`
 

pkg/kn/commands/broker/describe_test.go

@@ -86,9 +86,25 @@ func TestBrokerDescribeURL(t *testing.T) {
 	recorder.Validate()
 }
 
+func TestTriggerDescribeMachineReadable(t *testing.T) {
+	client := clientv1beta1.NewMockKnEventingClient(t, "mynamespace")
+
+	recorder := client.Recorder()
+	recorder.GetBroker("foo", getBroker(), nil)
+
+	out, err := executeBrokerCommand(client, "describe", "foo", "-o", "yaml")
+	assert.NilError(t, err)
+	assert.Assert(t, util.ContainsAll(out, "kind: Broker", "spec:", "status:", "metadata:"))
+
+	recorder.Validate()
+
+}
 func getBroker() *v1beta1.Broker {
 	return &v1beta1.Broker{
-		TypeMeta: v1.TypeMeta{},
+		TypeMeta: v1.TypeMeta{
+			Kind:       "Broker",
+			APIVersion: "eventing.knative.dev/v1beta1",
+		},
 		ObjectMeta: metav1.ObjectMeta{
 			Name:      "foo",
 			Namespace: "default",