Local mode for VBoxGuestAdditions. Provide local path and SHA256

builder/virtualbox/builder.go

@@ -25,29 +25,31 @@ type Builder struct {
 }
 
 type config struct {
-	BootCommand        []string      `mapstructure:"boot_command"`
-	BootWait           time.Duration ``
-	DiskSize           uint          `mapstructure:"disk_size"`
-	GuestAdditionsPath string        `mapstructure:"guest_additions_path"`
-	GuestOSType        string        `mapstructure:"guest_os_type"`
-	Headless           bool          `mapstructure:"headless"`
-	HTTPDir            string        `mapstructure:"http_directory"`
-	HTTPPortMin        uint          `mapstructure:"http_port_min"`
-	HTTPPortMax        uint          `mapstructure:"http_port_max"`
-	ISOMD5             string        `mapstructure:"iso_md5"`
-	ISOUrl             string        `mapstructure:"iso_url"`
-	OutputDir          string        `mapstructure:"output_directory"`
-	ShutdownCommand    string        `mapstructure:"shutdown_command"`
-	ShutdownTimeout    time.Duration ``
-	SSHHostPortMin     uint          `mapstructure:"ssh_host_port_min"`
-	SSHHostPortMax     uint          `mapstructure:"ssh_host_port_max"`
-	SSHPassword        string        `mapstructure:"ssh_password"`
-	SSHPort            uint          `mapstructure:"ssh_port"`
-	SSHUser            string        `mapstructure:"ssh_username"`
-	SSHWaitTimeout     time.Duration ``
-	VBoxVersionFile    string        `mapstructure:"virtualbox_version_file"`
-	VBoxManage         [][]string    `mapstructure:"vboxmanage"`
-	VMName             string        `mapstructure:"vm_name"`
+	BootCommand           []string      `mapstructure:"boot_command"`
+	BootWait              time.Duration ``
+	DiskSize              uint          `mapstructure:"disk_size"`
+	GuestAdditionsPath    string        `mapstructure:"guest_additions_path"`
+	GuestAdditionsURL     string        `mapstructure:"guest_additions_url"`
+	GuestAdditionsSHA256  string        `mapstructure:"guest_additions_sha256"`
+	GuestOSType           string        `mapstructure:"guest_os_type"`
+	Headless              bool          `mapstructure:"headless"`
+	HTTPDir               string        `mapstructure:"http_directory"`
+	HTTPPortMin           uint          `mapstructure:"http_port_min"`
+	HTTPPortMax           uint          `mapstructure:"http_port_max"`
+	ISOMD5                string        `mapstructure:"iso_md5"`
+	ISOUrl                string        `mapstructure:"iso_url"`
+	OutputDir             string        `mapstructure:"output_directory"`
+	ShutdownCommand       string        `mapstructure:"shutdown_command"`
+	ShutdownTimeout       time.Duration ``
+	SSHHostPortMin        uint          `mapstructure:"ssh_host_port_min"`
+	SSHHostPortMax        uint          `mapstructure:"ssh_host_port_max"`
+	SSHPassword           string        `mapstructure:"ssh_password"`
+	SSHPort               uint          `mapstructure:"ssh_port"`
+	SSHUser               string        `mapstructure:"ssh_username"`
+	SSHWaitTimeout        time.Duration ``
+	VBoxVersionFile       string        `mapstructure:"virtualbox_version_file"`
+	VBoxManage            [][]string    `mapstructure:"vboxmanage"`
+	VMName                string        `mapstructure:"vm_name"`
 
 	PackerBuildName string `mapstructure:"packer_build_name"`
 	PackerDebug     bool   `mapstructure:"packer_debug"`
@@ -170,6 +172,47 @@ func (b *Builder) Prepare(raws ...interface{}) error {
 		}
 	}
 
+	if b.config.GuestAdditionsSHA256 != "" {
+		b.config.GuestAdditionsSHA256 = strings.ToLower(b.config.GuestAdditionsSHA256)
+	}
+
+	if b.config.GuestAdditionsURL != "" {
+		url, err := url.Parse(b.config.GuestAdditionsURL)
+		if err != nil {
+			errs = append(errs, fmt.Errorf("guest_additions_url is not a valid URL: %s", err))
+		} else {
+			if url.Scheme == "" {
+				url.Scheme = "file"
+			}
+
+			if url.Scheme == "file" {
+				if _, err := os.Stat(url.Path); err != nil {
+					errs = append(errs, fmt.Errorf("guest_additions_url points to bad file: %s", err))
+				}
+			} else {
+				supportedSchemes := []string{"file", "http", "https"}
+				scheme := strings.ToLower(url.Scheme)
+
+				found := false
+				for _, supported := range supportedSchemes {
+					if scheme == supported {
+						found = true
+						break
+					}
+				}
+
+				if !found {
+					errs = append(errs, fmt.Errorf("Unsupported URL scheme in guest_additions_url: %s", scheme))
+				}
+			}
+		}
+
+		if len(errs) == 0 {
+			// Put the URL back together since we may have modified it
+			b.config.GuestAdditionsURL = url.String()
+		}
+	}
+
 	if _, err := os.Stat(b.config.OutputDir); err == nil {
 		errs = append(errs, errors.New("Output directory already exists. It must not exist."))
 	}

builder/virtualbox/step_download_guest_additions.go

@@ -33,7 +33,9 @@ func (s *stepDownloadGuestAdditions) Run(state map[string]interface{}) multistep
 	cache := state["cache"].(packer.Cache)
 	driver := state["driver"].(Driver)
 	ui := state["ui"].(packer.Ui)
+	config := state["config"].(*config)
 
+  // Get VBox version
 	version, err := driver.Version()
 	if err != nil {
 		state["error"] = fmt.Errorf("Error reading version for guest additions download: %s", err)
@@ -45,69 +47,19 @@ func (s *stepDownloadGuestAdditions) Run(state map[string]interface{}) multistep
 		version = newVersion
 	}
 
-	// First things first, we get the list of checksums for the files available
-	// for this version.
-	checksumsUrl := fmt.Sprintf("http://download.virtualbox.org/virtualbox/%s/SHA256SUMS", version)
-	checksumsFile, err := ioutil.TempFile("", "packer")
-	if err != nil {
-		state["error"] = fmt.Errorf(
-			"Failed creating temporary file to store guest addition checksums: %s",
-			err)
-		return multistep.ActionHalt
-	}
-	checksumsFile.Close()
-	defer os.Remove(checksumsFile.Name())
-
-	downloadConfig := &common.DownloadConfig{
-		Url:        checksumsUrl,
-		TargetPath: checksumsFile.Name(),
-		Hash:       nil,
-	}
-
-	log.Printf("Downloading guest addition checksums: %s", checksumsUrl)
-	download := common.NewDownloadClient(downloadConfig)
-	checksumsPath, action := s.progressDownload(download, state)
-	if action != multistep.ActionContinue {
-		return action
-	}
-
 	additionsName := fmt.Sprintf("VBoxGuestAdditions_%s.iso", version)
 
-	// Next, we find the checksum for the file we're looking to download.
-	// It is an error if the checksum cannot be found.
-	checksumsF, err := os.Open(checksumsPath)
-	if err != nil {
-		state["error"] = fmt.Errorf("Error opening guest addition checksums: %s", err)
-		return multistep.ActionHalt
-	}
-	defer checksumsF.Close()
-
-	// We copy the contents of the file into memory. In general this file
-	// is quite small so that is okay. In the future, we probably want to
-	// use bufio and iterate line by line.
-	var contents bytes.Buffer
-	io.Copy(&contents, checksumsF)
-
-	checksum := ""
-	for _, line := range strings.Split(contents.String(), "\n") {
-		parts := strings.Fields(line)
-		log.Printf("Checksum file parts: %#v", parts)
-		if len(parts) != 2 {
-			// Bogus line
-			continue
-		}
-
-		if strings.HasSuffix(parts[1], additionsName) {
-			checksum = parts[0]
-			log.Printf("Guest additions checksum: %s", checksum)
-			break
-		}
-	}
+  // Use provided version or get it from virtualbox.org
+  var checksum string
 
-	if checksum == "" {
-		state["error"] = fmt.Errorf("The checksum for the file '%s' could not be found.", additionsName)
-		return multistep.ActionHalt
-	}
+  if config.GuestAdditionsSHA256 != "" {
+    checksum = config.GuestAdditionsSHA256
+  } else {
+    checksum, action = s.downloadAdditionsSHA256(state, version, additionsName)
+    if action != multistep.ActionContinue {
+  		return action
+  	}
+  }
 
 	checksumBytes, err := hex.DecodeString(checksum)
 	if err != nil {
@@ -115,23 +67,29 @@ func (s *stepDownloadGuestAdditions) Run(state map[string]interface{}) multistep
 		return multistep.ActionHalt
 	}
 
-	url := fmt.Sprintf(
-		"http://download.virtualbox.org/virtualbox/%s/%s",
-		version, additionsName)
+  // Use the provided source (URL or file path) or generate it
+  url := config.GuestAdditionsURL
+  if url == "" {
+    url = fmt.Sprintf(
+		  "http://download.virtualbox.org/virtualbox/%s/%s",
+  		version,
+  		additionsName)
+  }
+
 	log.Printf("Guest additions URL: %s", url)
 
 	log.Printf("Acquiring lock to download the guest additions ISO.")
 	cachePath := cache.Lock(url)
 	defer cache.Unlock(url)
 
-	downloadConfig = &common.DownloadConfig{
+	downloadConfig := &common.DownloadConfig{
 		Url:        url,
 		TargetPath: cachePath,
 		Hash:       sha256.New(),
 		Checksum:   checksumBytes,
 	}
 
-	download = common.NewDownloadClient(downloadConfig)
+	download := common.NewDownloadClient(downloadConfig)
 	ui.Say("Downloading VirtualBox guest additions. Progress will be shown periodically.")
 	state["guest_additions_path"], action = s.progressDownload(download, state)
 	return action
@@ -179,3 +137,72 @@ DownloadWaitLoop:
 
 	return result, multistep.ActionContinue
 }
+
+func (s *stepDownloadGuestAdditions) downloadAdditionsSHA256 (state map[string]interface{}, additionsVersion string, additionsName string) (string, multistep.StepAction) {
+  // First things first, we get the list of checksums for the files available
+	// for this version.
+	checksumsUrl := fmt.Sprintf("http://download.virtualbox.org/virtualbox/%s/SHA256SUMS", additionsVersion)
+	checksumsFile, err := ioutil.TempFile("", "packer")
+	
+	if err != nil {
+		state["error"] = fmt.Errorf(
+			"Failed creating temporary file to store guest addition checksums: %s",
+			err)
+		return "", multistep.ActionHalt
+	}
+
+	checksumsFile.Close()
+	defer os.Remove(checksumsFile.Name())
+
+	downloadConfig := &common.DownloadConfig{
+		Url:        checksumsUrl,
+		TargetPath: checksumsFile.Name(),
+		Hash:       nil,
+	}
+
+	log.Printf("Downloading guest addition checksums: %s", checksumsUrl)
+	download := common.NewDownloadClient(downloadConfig)
+	checksumsPath, action := s.progressDownload(download, state)
+	if action != multistep.ActionContinue {
+		return "", action
+	}
+
+	// Next, we find the checksum for the file we're looking to download.
+	// It is an error if the checksum cannot be found.
+	checksumsF, err := os.Open(checksumsPath)
+	if err != nil {
+		state["error"] = fmt.Errorf("Error opening guest addition checksums: %s", err)
+		return "", multistep.ActionHalt
+	}
+	defer checksumsF.Close()
+
+	// We copy the contents of the file into memory. In general this file
+	// is quite small so that is okay. In the future, we probably want to
+	// use bufio and iterate line by line.
+	var contents bytes.Buffer
+	io.Copy(&contents, checksumsF)
+
+	checksum := ""
+	for _, line := range strings.Split(contents.String(), "\n") {
+		parts := strings.Fields(line)
+		log.Printf("Checksum file parts: %#v", parts)
+		if len(parts) != 2 {
+			// Bogus line
+			continue
+		}
+
+		if strings.HasSuffix(parts[1], additionsName) {
+			checksum = parts[0]
+			log.Printf("Guest additions checksum: %s", checksum)
+			break
+		}
+	}
+
+	if checksum == "" {
+		state["error"] = fmt.Errorf("The checksum for the file '%s' could not be found.", additionsName)
+		return "", multistep.ActionHalt
+	}
+
+  return checksum, multistep.ActionContinue
+
+}