Add json output for profile list

cmd/minikube/cmd/config/profile_list.go

@@ -17,9 +17,11 @@ limitations under the License.
 package config
 
 import (
+	"encoding/json"
 	"fmt"
 	"os"
 	"strconv"
+	"strings"
 
 	"k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/exit"
@@ -29,48 +31,101 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var (
+	output string
+)
+
 var profileListCmd = &cobra.Command{
 	Use:   "list",
 	Short: "Lists all minikube profiles.",
 	Long:  "Lists all valid minikube profiles and detects all possible invalid profiles.",
 	Run: func(cmd *cobra.Command, args []string) {
 
-		var validData [][]string
-
-		table := tablewriter.NewWriter(os.Stdout)
-		table.SetHeader([]string{"Profile", "VM Driver", "NodeIP", "Node Port", "Kubernetes Version"})
-		table.SetAutoFormatHeaders(false)
-		table.SetBorders(tablewriter.Border{Left: true, Top: true, Right: true, Bottom: true})
-		table.SetCenterSeparator("|")
-		validProfiles, invalidProfiles, err := config.ListProfiles()
-
-		if len(validProfiles) == 0 || err != nil {
-			exit.UsageT("No minikube profile was found. You can create one using `minikube start`.")
-		}
-		for _, p := range validProfiles {
-			validData = append(validData, []string{p.Name, p.Config.MachineConfig.VMDriver, p.Config.KubernetesConfig.NodeIP, strconv.Itoa(p.Config.KubernetesConfig.NodePort), p.Config.KubernetesConfig.KubernetesVersion})
+		switch strings.ToLower(output) {
+		case "json":
+			PrintProfilesJSON()
+		case "table":
+			PrintProfilesTable()
+		default:
+			exit.WithCodeT(exit.BadUsage, fmt.Sprintf("invalid output format: %s. Valid values: 'table', 'json'", output))
 		}
 
-		table.AppendBulk(validData)
-		table.Render()
-
-		if invalidProfiles != nil {
-			out.T(out.WarningType, "Found {{.number}} invalid profile(s) ! ", out.V{"number": len(invalidProfiles)})
-			for _, p := range invalidProfiles {
-				out.T(out.Empty, "\t "+p.Name)
-			}
-			out.T(out.Tip, "You can delete them using the following command(s): ")
-			for _, p := range invalidProfiles {
-				out.String(fmt.Sprintf("\t $ minikube delete -p %s \n", p.Name))
-			}
-
-		}
-		if err != nil {
-			exit.WithCodeT(exit.Config, fmt.Sprintf("error loading profiles: %v", err))
-		}
 	},
 }
 
+func PrintProfilesTable() {
+
+	var validData [][]string
+
+	table := tablewriter.NewWriter(os.Stdout)
+	table.SetHeader([]string{"Profile", "VM Driver", "NodeIP", "Node Port", "Kubernetes Version"})
+	table.SetAutoFormatHeaders(false)
+	table.SetBorders(tablewriter.Border{Left: true, Top: true, Right: true, Bottom: true})
+	table.SetCenterSeparator("|")
+	validProfiles, invalidProfiles, err := config.ListProfiles()
+
+	if len(validProfiles) == 0 || err != nil {
+		exit.UsageT("No minikube profile was found. You can create one using `minikube start`.")
+	}
+	for _, p := range validProfiles {
+		validData = append(validData, []string{p.Name, p.Config.MachineConfig.VMDriver, p.Config.KubernetesConfig.NodeIP, strconv.Itoa(p.Config.KubernetesConfig.NodePort), p.Config.KubernetesConfig.KubernetesVersion})
+	}
+
+	table.AppendBulk(validData)
+	table.Render()
+
+	if invalidProfiles != nil {
+		out.T(out.WarningType, "Found {{.number}} invalid profile(s) ! ", out.V{"number": len(invalidProfiles)})
+		for _, p := range invalidProfiles {
+			out.T(out.Empty, "\t "+p.Name)
+		}
+		out.T(out.Tip, "You can delete them using the following command(s): ")
+		for _, p := range invalidProfiles {
+			out.String(fmt.Sprintf("\t $ minikube delete -p %s \n", p.Name))
+		}
+
+	}
+
+	if err != nil {
+		exit.WithCodeT(exit.Config, fmt.Sprintf("error loading profiles: %v", err))
+	}
+
+}
+
+func PrintProfilesJSON() {
+	validProfiles, invalidProfiles, err := config.ListProfiles()
+
+	var valid []*config.Profile
+	var invalid []*config.Profile
+
+	if validProfiles != nil {
+		valid = validProfiles
+	} else {
+		valid = []*config.Profile{}
+	}
+
+	if invalidProfiles != nil {
+		invalid = invalidProfiles
+	} else {
+		invalid = []*config.Profile{}
+	}
+
+	var body = map[string]interface{}{}
+
+	if err == nil {
+		body["valid"] = valid
+		body["invalid"] = invalid
+		jsonString, _ := json.Marshal(body)
+		out.String(string(jsonString))
+	} else {
+		body["error"] = err
+		jsonString, _ := json.Marshal(body)
+		out.String(string(jsonString))
+		os.Exit(exit.Failure)
+	}
+}
+
 func init() {
+	profileListCmd.Flags().StringVarP(&output, "output", "o", "table", "The output format. One of 'json', 'table'")
 	ProfileCmd.AddCommand(profileListCmd)
 }