Function Save

pkg/chart/v2/util/save.go:108–155

Save creates an archived chart to the given directory. This takes an existing chart and a destination directory. If the directory is /foo, and the chart is named bar, with version 1.0.0, this will generate /foo/bar-1.0.0.tgz. This returns the absolute path to the chart archive file.

(c *chart.Chart, outDir string)

//
// This returns the absolute path to the chart archive file.
func Save(c *chart.Chart, outDir string) (string, error) {
	if err := c.Validate(); err != nil {
		return "", fmt.Errorf("chart validation: %w", err)
	}

	filename := fmt.Sprintf("%s-%s.tgz", c.Name(), c.Metadata.Version)
	filename = filepath.Join(outDir, filename)
	dir := filepath.Dir(filename)
	if stat, err := os.Stat(dir); err != nil {
		if errors.Is(err, fs.ErrNotExist) {
			if err2 := os.MkdirAll(dir, 0755); err2 != nil {
				return "", err2
			}
		} else {
			return "", fmt.Errorf("stat %s: %w", dir, err)
		}
	} else if !stat.IsDir() {
		return "", fmt.Errorf("is not a directory: %s", dir)
	}

	f, err := os.Create(filename)
	if err != nil {
		return "", err
	}

	// Wrap in gzip writer
	zipper := gzip.NewWriter(f)
	zipper.Extra = headerBytes
	zipper.Comment = "Helm"

	// Wrap in tar writer
	twriter := tar.NewWriter(zipper)
	rollback := false
	defer func() {
		twriter.Close()
		zipper.Close()
		f.Close()
		if rollback {
			os.Remove(filename)
		}
	}()

	if err := writeTarContents(twriter, c, ""); err != nil {
		rollback = true
		return filename, err
	}
	return filename, nil
}

func writeTarContents(out *tar.Writer, c *chart.Chart, prefix string) error {
	err := validateName(c.Name())