Add option to skip export of installed VM for Virtualbox ISO & OVF builders

Closes #4131

builder/virtualbox/common/step_export.go

@@ -21,6 +21,7 @@ type StepExport struct {
 	OutputDir      string
 	ExportOpts     []string
 	SkipNatMapping bool
+	SkipExport     bool
 }
 
 func (s *StepExport) Run(state multistep.StateBag) multistep.StepAction {
@@ -28,6 +29,12 @@ func (s *StepExport) Run(state multistep.StateBag) multistep.StepAction {
 	ui := state.Get("ui").(packer.Ui)
 	vmName := state.Get("vmName").(string)
 
+	// Skip export if requested
+	if s.SkipExport {
+		ui.Say("Skipping export of virtual machine...")
+		return multistep.ActionContinue
+	}
+
 	// Wait a second to ensure VM is really shutdown.
 	log.Println("1 second timeout to ensure VM is really shutdown")
 	time.Sleep(1 * time.Second)

builder/virtualbox/iso/builder.go

@@ -39,16 +39,17 @@ type Config struct {
 
 	BootCommand            []string `mapstructure:"boot_command"`
 	DiskSize               uint     `mapstructure:"disk_size"`
-	KeepRegistered         bool     `mapstructure:"keep_registered"`
 	GuestAdditionsMode     string   `mapstructure:"guest_additions_mode"`
 	GuestAdditionsPath     string   `mapstructure:"guest_additions_path"`
-	GuestAdditionsURL      string   `mapstructure:"guest_additions_url"`
 	GuestAdditionsSHA256   string   `mapstructure:"guest_additions_sha256"`
+	GuestAdditionsURL      string   `mapstructure:"guest_additions_url"`
 	GuestOSType            string   `mapstructure:"guest_os_type"`
+	HardDriveDiscard       bool     `mapstructure:"hard_drive_discard"`
 	HardDriveInterface     string   `mapstructure:"hard_drive_interface"`
 	HardDriveNonrotational bool     `mapstructure:"hard_drive_nonrotational"`
-	HardDriveDiscard       bool     `mapstructure:"hard_drive_discard"`
 	ISOInterface           string   `mapstructure:"iso_interface"`
+	KeepRegistered         bool     `mapstructure:"keep_registered"`
+	SkipExport             bool     `mapstructure:"skip_export"`
 	VMName                 string   `mapstructure:"vm_name"`
 
 	ctx interpolate.Context
@@ -268,6 +269,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 			OutputDir:      b.config.OutputDir,
 			ExportOpts:     b.config.ExportOpts.ExportOpts,
 			SkipNatMapping: b.config.SSHSkipNatMapping,
+			SkipExport:     b.config.SkipExport,
 		},
 	}
 

builder/virtualbox/ovf/builder.go

@@ -142,6 +142,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 			OutputDir:      b.config.OutputDir,
 			ExportOpts:     b.config.ExportOpts.ExportOpts,
 			SkipNatMapping: b.config.SSHSkipNatMapping,
+			SkipExport:     b.config.SkipExport,
 		},
 	}
 

builder/virtualbox/ovf/config.go

@@ -27,17 +27,18 @@ type Config struct {
 	vboxcommon.VBoxVersionConfig    `mapstructure:",squash"`
 
 	BootCommand          []string `mapstructure:"boot_command"`
-	SourcePath           string   `mapstructure:"source_path"`
 	Checksum             string   `mapstructure:"checksum"`
 	ChecksumType         string   `mapstructure:"checksum_type"`
-	TargetPath           string   `mapstructure:"target_path"`
 	GuestAdditionsMode   string   `mapstructure:"guest_additions_mode"`
 	GuestAdditionsPath   string   `mapstructure:"guest_additions_path"`
-	GuestAdditionsURL    string   `mapstructure:"guest_additions_url"`
 	GuestAdditionsSHA256 string   `mapstructure:"guest_additions_sha256"`
-	VMName               string   `mapstructure:"vm_name"`
+	GuestAdditionsURL    string   `mapstructure:"guest_additions_url"`
-	ImportOpts           string   `mapstructure:"import_opts"`
 	ImportFlags          []string `mapstructure:"import_flags"`
+	ImportOpts           string   `mapstructure:"import_opts"`
+	SourcePath           string   `mapstructure:"source_path"`
+	TargetPath           string   `mapstructure:"target_path"`
+	VMName               string   `mapstructure:"vm_name"`
+	SkipExport           bool     `mapstructure:"skip_export"`
 
 	ctx interpolate.Context
 }

website/source/docs/builders/virtualbox-iso.html.md

@@ -268,6 +268,10 @@ builder.
     doesn't shut down in this time, it is an error. By default, the timeout is
     `5m`, or five minutes.
 
+-   `skip_export` (boolean) - Defaults to `false`. When enabled Packer will
+    skip export of the installed virtual machine. Only useful for some edge
+    use cases.
+
 -   `ssh_host_port_min` and `ssh_host_port_max` (integer) - The minimum and
     maximum port to use for the SSH port on the host machine which is forwarded
     to the SSH port on the guest machine. Because Packer often runs in parallel,

website/source/docs/builders/virtualbox-ovf.html.md

@@ -229,6 +229,10 @@ builder.
     doesn't shut down in this time, it is an error. By default, the timeout is
     "5m", or five minutes.
 
+-   `skip_export` (boolean) - Defaults to `false`. When enabled Packer will
+    skip export of the installed virtual machine. Only useful for some edge
+    use cases.
+
 -   `ssh_host_port_min` and `ssh_host_port_max` (integer) - The minimum and
     maximum port to use for the SSH port on the host machine which is forwarded
     to the SSH port on the guest machine. Because Packer often runs in parallel,