builder/parallels: Disable default cdrom0 device and then enable it on cleanup

This is needed to make 'cdrom0' device unavailable during the ISO installation process.
It is required for some guest OS types, such as FreeBSD and OmniOS.

builder/parallels/iso/step_attach_iso.go

@@ -38,6 +38,7 @@ func (s *stepAttachISO) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
+	// Set new boot order
 	ui.Say("Setting the boot order...")
 	command := []string{
 		"set", vmName,
@@ -51,6 +52,20 @@ func (s *stepAttachISO) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
+	// Disable 'cdrom0' device
+	ui.Say("Disabling default CD/DVD drive...")
+	command = []string{
+		"set", vmName,
+		"--device-set", "cdrom0", "--disable",
+	}
+
+	if err := driver.Prlctl(command...); err != nil {
+		err := fmt.Errorf("Error disabling default CD/DVD drive: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
 	// Track the device name so that we can can delete later
 	s.cdromDevice = cdrom
 
@@ -58,17 +73,28 @@ func (s *stepAttachISO) Run(state multistep.StateBag) multistep.StepAction {
 }
 
 func (s *stepAttachISO) Cleanup(state multistep.StateBag) {
-	if s.cdromDevice == "" {
-		return
-	}
-
 	driver := state.Get("driver").(parallelscommon.Driver)
 	ui := state.Get("ui").(packer.Ui)
 	vmName := state.Get("vmName").(string)
 
-	log.Println("Detaching ISO...")
-
+	// Enable 'cdrom0' device back
+	log.Println("Enabling default CD/DVD drive...")
 	command := []string{
+		"set", vmName,
+		"--device-set", "cdrom0", "--enable",
+	}
+
+	if err := driver.Prlctl(command...); err != nil {
+		ui.Error(fmt.Sprintf("Error enabling default CD/DVD drive: %s", err))
+	}
+
+	// Detach ISO
+	if s.cdromDevice == "" {
+		return
+	}
+
+	log.Println("Detaching ISO...")
+	command = []string{
 		"set", vmName,
 		"--device-del", s.cdromDevice,
 	}