Function SaveImage

pkg/docker/dockerutil/dockerutil.go:266–357

(dclient *dockerapi.Client, imageRef, local string, extract, removeOrig bool)

}

func SaveImage(dclient *dockerapi.Client, imageRef, local string, extract, removeOrig bool) error {
	if local == "" {
		return ErrBadParam
	}

	var err error
	if dclient == nil {
		socketInfo, err := dockerclient.GetUnixSocketAddr()
		if err != nil {
			return err
		}

		if socketInfo == nil || socketInfo.Address == "" {
			return fmt.Errorf("no unix socket found")
		}

		dclient, err = dockerapi.NewClient(socketInfo.Address)
		if err != nil {
			log.Errorf("dockerutil.SaveImage: dockerapi.NewClient() error = %v", err)
			return err
		}
	}

	imageRef = CleanImageID(imageRef)

	//todo: 'pull' the image if it's not available locally yet
	//note: HasImage() doesn't work with image IDs

	dir := fsutil.FileDir(local)
	if !fsutil.DirExists(dir) {
		err := os.MkdirAll(dir, 0755)
		if err != nil {
			return err
		}
	}

	dfile, err := os.Create(local)
	if err != nil {
		return err
	}

	options := dockerapi.ExportImageOptions{
		Name:              imageRef,
		OutputStream:      dfile,
		InactivityTimeout: 20 * time.Second,
	}

	err = dclient.ExportImage(options)
	if err != nil {
		log.Errorf("dockerutil.SaveImage: dclient.ExportImage() error = %v", err)
		dfile.Close()
		return err
	}

	dfile.Close()

	if extract {
		dstDir := filepath.Dir(local)