builder/parallels: "guest_os_distribution" renamed to "guest_os_type".

"guest_os_distribution" become deprecated and is not required anymore.
But if it is defined (in outdated templates),then the value will be copied to "guest_os_type" and warning will be displayed.

builder/parallels/iso/builder.go

@@ -31,7 +31,7 @@ type config struct {
 
 	BootCommand        []string `mapstructure:"boot_command"`
 	DiskSize           uint     `mapstructure:"disk_size"`
-	GuestOSDistribution string   `mapstructure:"guest_os_distribution"`
+	GuestOSType        string   `mapstructure:"guest_os_type"`
 	HardDriveInterface string   `mapstructure:"hard_drive_interface"`
 	HostInterfaces     []string `mapstructure:"host_interfaces"`
 	HTTPDir            string   `mapstructure:"http_directory"`
@@ -45,7 +45,7 @@ type config struct {
 	RawSingleISOUrl string `mapstructure:"iso_url"`
 
 	// Deprecated parameters
-	GuestOSType            string `mapstructure:"guest_os_type"`
+	GuestOSDistribution    string `mapstructure:"guest_os_distribution"`
 	ParallelsToolsHostPath string `mapstructure:"parallels_tools_host_path"`
 
 	tpl *packer.ConfigTemplate
@@ -85,8 +85,18 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 		b.config.HardDriveInterface = "sata"
 	}
 
-	if b.config.GuestOSDistribution == "" {
-		b.config.GuestOSDistribution = "other"
+	if b.config.GuestOSType == "" {
+		b.config.GuestOSType = "other"
+	}
+
+	if b.config.GuestOSDistribution != "" {
+		// Compatibility with older templates:
+		// Use value of 'guest_os_distribution' if it is defined.
+		b.config.GuestOSType = b.config.GuestOSDistribution
+		warnings = append(warnings,
+			"A 'guest_os_distribution' has been completely replaced with 'guest_os_type'\n"+
+				"It is recommended to remove it and assign the previous value to 'guest_os_type'.\n"+
+				"Run it to see all available values: `prlctl create x -d list` ")
 	}
 
 	if b.config.HTTPPortMin == 0 {
@@ -108,7 +118,7 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 
 	// Errors
 	templates := map[string]*string{
-		"guest_os_distribution": &b.config.GuestOSDistribution,
+		"guest_os_type":        &b.config.GuestOSType,
 		"hard_drive_interface": &b.config.HardDriveInterface,
 		"http_directory":       &b.config.HTTPDir,
 		"iso_checksum":         &b.config.ISOChecksum,

builder/parallels/iso/builder_test.go

@@ -38,8 +38,8 @@ func TestBuilderPrepare_Defaults(t *testing.T) {
 		t.Fatalf("should not have error: %s", err)
 	}
 
-	if b.config.GuestOSDistribution != "other" {
-		t.Errorf("bad guest OS distribution: %s", b.config.GuestOSDistribution)
+	if b.config.GuestOSType != "other" {
+		t.Errorf("bad guest OS type: %s", b.config.GuestOSType)
 	}
 
 	if b.config.VMName != "packer-foo" {
@@ -79,6 +79,25 @@ func TestBuilderPrepare_DiskSize(t *testing.T) {
 	}
 }
 
+func TestBuilderPrepare_GuestOSType(t *testing.T) {
+	var b Builder
+	config := testConfig()
+	delete(config, "guest_os_distribution")
+
+	// Test deprecated parameter
+	config["guest_os_distribution"] = "bolgenos"
+	warns, err := b.Prepare(config)
+	if len(warns) == 0 {
+		t.Fatalf("should have warning")
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+	if b.config.GuestOSType != "bolgenos" {
+		t.Fatalf("bad: %s", b.config.GuestOSType)
+	}
+}
+
 func TestBuilderPrepare_HardDriveInterface(t *testing.T) {
 	var b Builder
 	config := testConfig()

builder/parallels/iso/step_create_vm.go

@@ -28,7 +28,7 @@ func (s *stepCreateVM) Run(state multistep.StateBag) multistep.StepAction {
 	commands := make([][]string, 8)
 	commands[0] = []string{
 		"create", name,
-		"--distribution", config.GuestOSDistribution,
+		"--distribution", config.GuestOSType,
 		"--dst", path,
 		"--vmtype", "vm",
 	}