add split boot partiton support

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

cmd/d2vm/build.go

@@ -107,6 +107,8 @@ var (
 				d2vm.WithCmdLineExtra(cmdLineExtra),
 				d2vm.WithNetworkManager(d2vm.NetworkManager(networkManager)),
 				d2vm.WithRaw(raw),
+				d2vm.WithSplitBoot(splitBoot),
+				d2vm.WithBootSize(bootSize),
 			); err != nil {
 				return err
 			}

cmd/d2vm/convert.go

@@ -95,6 +95,8 @@ var (
 				d2vm.WithCmdLineExtra(cmdLineExtra),
 				d2vm.WithNetworkManager(d2vm.NetworkManager(networkManager)),
 				d2vm.WithRaw(raw),
+				d2vm.WithSplitBoot(splitBoot),
+				d2vm.WithBootSize(bootSize),
 			); err != nil {
 				return err
 			}
@@ -109,12 +111,12 @@ var (
 	}
 )
 
-func parseSize(s string) (int64, error) {
+func parseSize(s string) (uint64, error) {
 	var v datasize.ByteSize
 	if err := v.UnmarshalText([]byte(s)); err != nil {
 		return 0, err
 	}
-	return int64(v), nil
+	return uint64(v), nil
 }
 
 func init() {

cmd/d2vm/flags.go

@@ -33,6 +33,8 @@ var (
 	containerDiskTag = ""
 	push             bool
 	networkManager   string
+	splitBoot        bool
+	bootSize         uint64
 )
 
 func buildFlags() *pflag.FlagSet {
@@ -46,5 +48,7 @@ func buildFlags() *pflag.FlagSet {
 	flags.BoolVar(&raw, "raw", false, "Just convert the container to virtual machine image without installing anything more")
 	flags.StringVarP(&containerDiskTag, "tag", "t", "", "Container disk Docker image tag")
 	flags.BoolVar(&push, "push", false, "Push the container disk image to the registry")
+	flags.BoolVar(&splitBoot, "split-boot", false, "Split the boot partition from the root partition")
+	flags.Uint64Var(&bootSize, "boot-size", 100, "Size of the boot partition in MB")
 	return flags
 }