builder/virtualbox: export to ovf or ova (default ovf)

builder/virtualbox/builder.go

@@ -48,6 +48,7 @@ type config struct {
 	VBoxVersionFile      string     `mapstructure:"virtualbox_version_file"`
 	VBoxManage           [][]string `mapstructure:"vboxmanage"`
 	VMName               string     `mapstructure:"vm_name"`
+	Format         	     string     `mapstructure:"format"`
 
 	RawBootWait        string `mapstructure:"boot_wait"`
 	RawSingleISOUrl    string `mapstructure:"iso_url"`
@@ -131,6 +132,10 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		b.config.VMName = fmt.Sprintf("packer-%s", b.config.PackerBuildName)
 	}
 
+	if b.config.Format == "" {
+		b.config.Format = "ovf"
+	}
+
 	// Errors
 	templates := map[string]*string{
 		"guest_additions_sha256":  &b.config.GuestAdditionsSHA256,
@@ -145,6 +150,7 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		"ssh_username":            &b.config.SSHUser,
 		"virtualbox_version_file": &b.config.VBoxVersionFile,
 		"vm_name":                 &b.config.VMName,
+		"format":                  &b.config.Format,
 		"boot_wait":               &b.config.RawBootWait,
 		"shutdown_timeout":        &b.config.RawShutdownTimeout,
 		"ssh_wait_timeout":        &b.config.RawSSHWaitTimeout,
@@ -197,6 +203,11 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		}
 	}
 
+	if !(b.config.Format == "ovf" || b.config.Format == "ova") {
+		errs = packer.MultiErrorAppend(
+			errs, errors.New("invalid format, only 'ovf' or 'ova' are allowed"))
+	}
+
 	if b.config.HTTPPortMin > b.config.HTTPPortMax {
 		errs = packer.MultiErrorAppend(
 			errs, errors.New("http_port_min must be less than http_port_max"))

builder/virtualbox/builder_test.go

@@ -58,6 +58,10 @@ func TestBuilderPrepare_Defaults(t *testing.T) {
 	if b.config.VMName != "packer-foo" {
 		t.Errorf("bad vm name: %s", b.config.VMName)
 	}
+
+	if b.config.Format != "ovf" {
+		t.Errorf("bad format: %s", b.config.Format)
+	}
 }
 
 func TestBuilderPrepare_BootWait(t *testing.T) {
@@ -248,6 +252,34 @@ func TestBuilderPrepare_HTTPPort(t *testing.T) {
 	}
 }
 
+func TestBuilderPrepare_Format(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Bad
+	config["format"] = "illegal value"
+	err := b.Prepare(config)
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Good
+	config["format"] = "ova"
+	b = Builder{}
+	err = b.Prepare(config)
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	// Good
+	config["format"] = "ovf"
+	b = Builder{}
+	err = b.Prepare(config)
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+}
+
 func TestBuilderPrepare_InvalidKey(t *testing.T) {
 	var b Builder
 	config := testConfig()

builder/virtualbox/step_export.go

@@ -50,7 +50,7 @@ func (s *stepExport) Run(state map[string]interface{}) multistep.StepAction {
 	}
 
 	// Export the VM to an OVF
-	outputPath := filepath.Join(config.OutputDir, "packer.ovf")
+	outputPath := filepath.Join(config.OutputDir, "packer." + config.Format)
 
 	command = []string{
 		"export",