Move CalculateDiskSizeInMB to utils to use in kvm

Makefile

@@ -275,3 +275,16 @@ $(ISO_BUILD_IMAGE): deploy/iso/minikube-iso/Dockerfile
 release-iso: minikube_iso checksum
 	gsutil cp out/minikube.iso gs://$(ISO_BUCKET)/minikube-$(ISO_VERSION).iso
 	gsutil cp out/minikube.iso.sha256 gs://$(ISO_BUCKET)/minikube-$(ISO_VERSION).iso.sha256
+
+out/docker-machine-driver-kvm: $(KVM_DRIVER_FILES)
+	go build 																		\
+		-installsuffix "static" 													\
+		-ldflags "-X k8s.io/minikube/pkg/drivers/kvm/version.VERSION=$(VERSION)" 	\
+		-tags libvirt.1.2.2 														\
+		-o $(BUILD_DIR)/docker-machine-driver-kvm 									\
+		k8s.io/minikube/cmd/drivers/kvm
+	chmod +X $@
+
+.PHONY: install-kvm
+install-kvm: out/docker-machine-driver-kvm
+	cp out/docker-machine-driver-kvm $(GOBIN)/docker-machine-driver-kvm

cmd/minikube/cmd/start.go

@@ -28,7 +28,6 @@ import (
 	"time"
 
 	"github.com/blang/semver"
-	units "github.com/docker/go-units"
 	"github.com/docker/machine/libmachine/host"
 	"github.com/golang/glog"
 	"github.com/spf13/cobra"
@@ -93,7 +92,7 @@ func runStart(cmd *cobra.Command, args []string) {
 	defer api.Close()
 
 	diskSize := viper.GetString(humanReadableDiskSize)
-	diskSizeMB := calculateDiskSizeInMB(diskSize)
+	diskSizeMB := util.CalculateDiskSizeInMB(diskSize)
 
 	if diskSizeMB < constants.MinimumDiskSizeMB {
 		err := fmt.Errorf("Disk Size %dMB (%s) is too small, the minimum disk size is %dMB", diskSizeMB, diskSize, constants.MinimumDiskSizeMB)
@@ -317,14 +316,6 @@ func validateK8sVersion(version string) {
 	}
 }
 
-func calculateDiskSizeInMB(humanReadableDiskSize string) int {
-	diskSize, err := units.FromHumanSize(humanReadableDiskSize)
-	if err != nil {
-		glog.Errorf("Invalid disk size: %s", err)
-	}
-	return int(diskSize / units.MB)
-}
-
 func init() {
 	startCmd.Flags().Bool(keepContext, constants.DefaultKeepContext, "This will keep the existing kubectl context and will create a minikube context.")
 	startCmd.Flags().Bool(createMount, false, "This will start the mount daemon and automatically mount files into minikube")

pkg/util/utils.go

@@ -30,6 +30,8 @@ import (
 	"time"
 
 	"github.com/blang/semver"
+	units "github.com/docker/go-units"
+	"github.com/golang/glog"
 	"github.com/pkg/errors"
 	"k8s.io/minikube/pkg/minikube/constants"
 	"k8s.io/minikube/pkg/minikube/kubernetes_versions"
@@ -42,6 +44,14 @@ type RetriableError struct {
 
 func (r RetriableError) Error() string { return "Temporary Error: " + r.Err.Error() }
 
+func CalculateDiskSizeInMB(humanReadableDiskSize string) int {
+	diskSize, err := units.FromHumanSize(humanReadableDiskSize)
+	if err != nil {
+		glog.Errorf("Invalid disk size: %s", err)
+	}
+	return int(diskSize / units.MB)
+}
+
 // Until endlessly loops the provided function until a message is received on the done channel.
 // The function will wait the duration provided in sleep between function calls. Errors will be sent on provider Writer.
 func Until(fn func() error, w io.Writer, name string, sleep time.Duration, done <-chan struct{}) {