Snippet for self updatable go binaries

updatable-go-binary-snippet5.go

// Code snippet: To extract executable
func getExecutableFromAsset(assetId AssetId, format AssetFormat) ([]byte, error) {
	buff, err := downloadAssetFromID(assetId)

	if format == Zip {
		zipReader, err := zip.NewReader(bytes.NewReader(buff.Bytes()), int64(buff.Len()))

		// Zip reader logic
	} else if format == Tar {
		gzipReader, err := gzip.NewReader(buff)

		tarReader := tar.NewReader(gzipReader)
	}
	return nil, fmt.Errorf("executable not found in archive")
}