check cloud provider cli whether installed on local env

pkg/cmd/aws.go

@@ -16,6 +16,8 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -31,7 +33,10 @@ func NewAwsCmd(targetReader TargetReader) *cobra.Command {
 			if !CheckShootIsTargeted(target) {
 				return errors.New("no shoot targeted")
 			}
-
+			if !CheckToolInstalled("aws") {
+				fmt.Println("Please go to https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html for how to install aws cli")
+				os.Exit(2)
+			}
 			arguments := "aws " + strings.Join(args[:], " ")
 			operate("aws", arguments)
 

pkg/cmd/az.go

@@ -16,6 +16,8 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -31,7 +33,10 @@ func NewAzCmd(targetReader TargetReader) *cobra.Command {
 			if !CheckShootIsTargeted(target) {
 				return errors.New("no shoot targeted")
 			}
-
+			if !CheckToolInstalled("az") {
+				fmt.Println("Please go to https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest for how to install az cli")
+				os.Exit(2)
+			}
 			arguments := "az " + strings.Join(args[:], " ")
 			operate("az", arguments)
 

pkg/cmd/gcloud.go

@@ -16,6 +16,8 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -31,6 +33,10 @@ func NewGcloudCmd(targetReader TargetReader) *cobra.Command {
 			if !CheckShootIsTargeted(target) {
 				return errors.New("no shoot targeted")
 			}
+			if !CheckToolInstalled("gcloud") {
+				fmt.Println("Please go to https://cloud.google.com/sdk/install for how to install gcloud")
+				os.Exit(2)
+			}
 
 			arguments := "gcloud " + strings.Join(args[:], " ")
 			operate("gcp", arguments)

pkg/cmd/openstack.go

@@ -16,6 +16,8 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -31,7 +33,10 @@ func NewOpenstackCmd(targetReader TargetReader) *cobra.Command {
 			if !CheckShootIsTargeted(target) {
 				return errors.New("no shoot targeted")
 			}
-
+			if !CheckToolInstalled("openstack") {
+				fmt.Println("Please go to https://docs.openstack.org/newton/user-guide/common/cli-install-openstack-command-line-clients.html for how to install openstack cli")
+				os.Exit(2)
+			}
 			arguments := "openstack " + strings.Join(args[:], " ")
 			operate("openstack", arguments)
 

pkg/cmd/utils.go

@@ -254,3 +254,13 @@ func GardenctlInfoLog(logMsg string) {
 	var logger = gardenerlogger.NewLogger("info")
 	logger.Infof(logMsg)
 }
+
+//CheckToolInstalled checks whether cliName is installed on local machine
+func CheckToolInstalled(cliName string) bool {
+	_, err := exec.LookPath(cliName)
+	if err != nil {
+		fmt.Println(cliName + " is not installed on your system")
+		return false
+	}
+	return true
+}