func writeDirectoryMetadata(file io.Writer,
directoryMetadata image.DirectoryMetadata) error {
w := bufio.NewWriter(file)
writer := fsutil.NewChecksumWriter(w)
if err := gob.NewEncoder(writer).Encode(directoryMetadata); err != nil {
return err
}
if err := writer.WriteChecksum(); err != nil {
return err
}
return w.Flush()
}
func (imdb *ImageDataBase) addImage(image *image.Image, name string,
username *string) error {
if err := image.Verify(); err != nil {
return err
}
imdb.Lock()
defer imdb.Unlock()
if imdb.scheduleExpiration(image, name) {
imdb.logger.Printf("Ignoring already expired image: %s\n", name)
return nil
}
if _, ok := imdb.imageMap[name]; ok {
return errors.New("image: " + name + " already exists")
} else {
err := imdb.checkDirectoryPermissions(path.Dir(name), username)
if err != nil {
return err
}
filename := path.Join(imdb.baseDir, name)
file, err := os.OpenFile(filename, os.O_CREATE|os.O_EXCL|os.O_RDWR,
filePerms)
if err != nil {
if os.IsExist(err) {
return errors.New("cannot add a previously deleted image")
}
return err
}
defer file.Close()
w := bufio.NewWriter(file)
defer w.Flush()
writer := fsutil.NewChecksumWriter(w)
defer writer.WriteChecksum()
encoder := gob.NewEncoder(writer)
encoder.Encode(image)
imdb.imageMap[name] = image
imdb.addNotifiers.sendPlain(name, "add", imdb.logger)
return nil
}
}