Function tarGzipFile

acceptance/kubernetes/kind/image.go:422–462

Tar and gzip a file. Used with trusted artifacts.

(source, target string)

// Tar and gzip a file. Used with trusted artifacts.
func tarGzipFile(source, target string) error {
	srcFile, err := os.Open(source)
	if err != nil {
		return fmt.Errorf("opening source file: %w", err)
	}
	defer srcFile.Close()

	outFile, err := os.Create(target)
	if err != nil {
		return fmt.Errorf("creating target file: %w", err)
	}
	defer outFile.Close()

	gzw := gzip.NewWriter(outFile)
	defer gzw.Close()

	tw := tar.NewWriter(gzw)
	defer tw.Close()

	info, err := srcFile.Stat()
	if err != nil {
		return fmt.Errorf("getting source file info: %w", err)
	}

	header := &tar.Header{
		Name:    filepath.Base(source),
		Mode:    int64(info.Mode()),
		Size:    info.Size(),
		ModTime: info.ModTime(),
	}

	if err := tw.WriteHeader(header); err != nil {
		return fmt.Errorf("writing tar header: %w", err)
	}

	if _, err := io.Copy(tw, srcFile); err != nil {
		return fmt.Errorf("copying file content into tar: %w", err)
	}

	return nil
}