Add --vm flag for users who want to autoselect only VM's

cmd/minikube/cmd/start.go

@@ -194,6 +194,7 @@ func initDriverFlags() {
 	startCmd.Flags().String("driver", "", fmt.Sprintf("Driver is one of: %v (defaults to auto-detect)", driver.DisplaySupportedDrivers()))
 	startCmd.Flags().String("vm-driver", "", "DEPRECATED, use `driver` instead.")
 	startCmd.Flags().Bool(disableDriverMounts, false, "Disables the filesystem mounts provided by the hypervisors")
+	startCmd.Flags().Bool("vm", false, "Filter to use only VM Drivers")
 
 	// kvm2
 	startCmd.Flags().String(kvmNetwork, "default", "The KVM network name. (kvm2 driver only)")
@@ -465,7 +466,7 @@ func selectDriver(existing *config.ClusterConfig) registry.DriverState {
 		return ds
 	}
 
-	pick, alts := driver.Suggest(driver.Choices())
+	pick, alts := driver.Suggest(driver.Choices(viper.GetBool("vm")))
 	if pick.Name == "" {
 		exit.WithCodeT(exit.Config, "Unable to determine a default driver to use. Try specifying --driver, or see https://minikube.sigs.k8s.io/docs/start/")
 	}

pkg/minikube/driver/driver.go

@@ -164,14 +164,27 @@ func FlagDefaults(name string) FlagHints {
 }
 
 // Choices returns a list of drivers which are possible on this system
-func Choices() []registry.DriverState {
+func Choices(vm bool) []registry.DriverState {
 	options := registry.Available()
-
-	// Descending priority for predictability and appearance
-	sort.Slice(options, func(i, j int) bool {
-		return options[i].Priority > options[j].Priority
-	})
-	return options
+	if vm {
+		var vmOptions []registry.DriverState 
+		for _, ds := range options {
+			if IsVM(ds.Name) {
+				vmOptions = append(vmOptions,ds)
+			}
+		}
+		// Descending priority for predictability and appearance
+                sort.Slice(vmOptions, func(i, j int) bool {
+                        return vmOptions[i].Priority > vmOptions[j].Priority
+		})
+		return vmOptions
+	}else {
+		// Descending priority for predictability and appearance
+		sort.Slice(options, func(i, j int) bool {
+			return options[i].Priority > options[j].Priority
+		})
+		return options
+	}
 }
 
 // Suggest returns a suggested driver from a set of options

pkg/minikube/driver/driver_test.go

@@ -162,7 +162,7 @@ func TestSuggest(t *testing.T) {
 				}
 			}
 
-			got := Choices()
+			got := Choices(false)
 			gotNames := []string{}
 			for _, c := range got {
 				gotNames = append(gotNames, c.Name)

pkg/minikube/registry/global.go

@@ -1,12 +1,9 @@
 /*
 Copyright 2018 The Kubernetes Authors All rights reserved.
-
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
-
     http://www.apache.org/licenses/LICENSE-2.0
-
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.