Add ability to get json for "minikube service list"

cmd/minikube/cmd/service_list.go

@@ -17,6 +17,7 @@ limitations under the License.
 package cmd
 
 import (
+	"encoding/json"
 	"os"
 	"runtime"
 	"strings"
@@ -32,6 +33,7 @@ import (
 )
 
 var serviceListNamespace string
+var profileOutput string
 
 // serviceListCmd represents the service list command
 var serviceListCmd = &cobra.Command{
@@ -40,6 +42,7 @@ var serviceListCmd = &cobra.Command{
 	Long:  `Lists the URLs for the services in your local cluster`,
 	Run: func(cmd *cobra.Command, args []string) {
 		co := mustload.Healthy(ClusterFlagValue())
+		output := strings.ToLower(profileOutput)
 
 		serviceURLs, err := service.GetServiceURLs(co.API, co.Config.Name, serviceListNamespace, serviceURLTemplate)
 		if err != nil {
@@ -48,28 +51,43 @@ var serviceListCmd = &cobra.Command{
 			os.Exit(reason.ExSvcUnavailable)
 		}
 
-		var data [][]string
-		for _, serviceURL := range serviceURLs {
-			if len(serviceURL.URLs) == 0 {
-				data = append(data, []string{serviceURL.Namespace, serviceURL.Name, "No node port"})
-			} else {
-				servicePortNames := strings.Join(serviceURL.PortNames, "\n")
-				serviceURLs := strings.Join(serviceURL.URLs, "\n")
+		switch output {
+		case "table":
+			printServicesTable(serviceURLs, co)
+		case "json":
+			printServicesJSON(serviceURLs)
+		}
+	},
+}
 
-				// if we are running Docker on OSX we empty the internal service URLs
-				if runtime.GOOS == "darwin" && co.Config.Driver == oci.Docker {
-					serviceURLs = ""
-				}
+func printServicesTable(serviceURLs service.URLs, co mustload.ClusterController) {
+	var data [][]string
+	for _, serviceURL := range serviceURLs {
+		if len(serviceURL.URLs) == 0 {
+			data = append(data, []string{serviceURL.Namespace, serviceURL.Name, "No node port"})
+		} else {
+			servicePortNames := strings.Join(serviceURL.PortNames, "\n")
+			serviceURLs := strings.Join(serviceURL.URLs, "\n")
 
-				data = append(data, []string{serviceURL.Namespace, serviceURL.Name, servicePortNames, serviceURLs})
+			// if we are running Docker on OSX we empty the internal service URLs
+			if runtime.GOOS == "darwin" && co.Config.Driver == oci.Docker {
+				serviceURLs = ""
 			}
+
+			data = append(data, []string{serviceURL.Namespace, serviceURL.Name, servicePortNames, serviceURLs})
 		}
+	}
 
-		service.PrintServiceList(os.Stdout, data)
-	},
+	service.PrintServiceList(os.Stdout, data)
+}
+
+func printServicesJSON(serviceURLs service.URLs) {
+	jsonString, _ := json.Marshal(serviceURLs)
+	os.Stdout.Write(jsonString)
 }
 
 func init() {
+	serviceListCmd.Flags().StringVarP(&profileOutput, "output", "o", "table", "The output format. One of 'json', 'table'")
 	serviceListCmd.Flags().StringVarP(&serviceListNamespace, "namespace", "n", core.NamespaceAll, "The services namespace")
 	serviceCmd.AddCommand(serviceListCmd)
 }