func (s *stepDownloadGuestAdditions) Run(state map[string]interface{}) multistep.StepAction {
var action multistep.StepAction
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)
return multistep.ActionHalt
}
if newVersion, ok := additionsVersionMap[version]; ok {
log.Printf("Rewriting guest additions version: %s to %s", version, newVersion)
version = newVersion
}
additionsName := fmt.Sprintf("VBoxGuestAdditions_%s.iso", version)
// Use provided version or get it from virtualbox.org
var checksum string
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 {
state["error"] = fmt.Errorf("Couldn't decode checksum into bytes: %s", checksum)
return multistep.ActionHalt
}
// 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{
Url: url,
TargetPath: cachePath,
Hash: sha256.New(),
Checksum: checksumBytes,
}
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
}
func (s stepDownloadISO) Run(state map[string]interface{}) multistep.StepAction {
cache := state["cache"].(packer.Cache)
config := state["config"].(*config)
ui := state["ui"].(packer.Ui)
checksum, err := hex.DecodeString(config.ISOChecksum)
if err != nil {
state["error"] = fmt.Errorf("Error parsing checksum: %s", err)
return multistep.ActionHalt
}
log.Printf("Acquiring lock to download the ISO.")
cachePath := cache.Lock(config.ISOUrl)
defer cache.Unlock(config.ISOUrl)
downloadConfig := &common.DownloadConfig{
Url: config.ISOUrl,
TargetPath: cachePath,
CopyFile: false,
Hash: common.HashForType(config.ISOChecksumType),
Checksum: checksum,
}
download := common.NewDownloadClient(downloadConfig)
downloadCompleteCh := make(chan error, 1)
go func() {
ui.Say("Copying or downloading ISO. Progress will be reported periodically.")
cachePath, err = download.Get()
downloadCompleteCh <- err
}()
progressTicker := time.NewTicker(5 * time.Second)
defer progressTicker.Stop()
DownloadWaitLoop:
for {
select {
case err := <-downloadCompleteCh:
if err != nil {
err := fmt.Errorf("Error downloading ISO: %s", err)
state["error"] = err
ui.Error(err.Error())
return multistep.ActionHalt
}
break DownloadWaitLoop
case <-progressTicker.C:
ui.Message(fmt.Sprintf("Download progress: %d%%", download.PercentProgress()))
case <-time.After(1 * time.Second):
if _, ok := state[multistep.StateCancelled]; ok {
ui.Say("Interrupt received. Cancelling download...")
return multistep.ActionHalt
}
}
}
log.Printf("Path to ISO on disk: %s", cachePath)
state["iso_path"] = cachePath
return 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
}
defer os.Remove(checksumsFile.Name())
checksumsFile.Close()
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
}