func unpackZip()

in internal/platform/embed.go [125:182]
49 lines of code
13 McCabe index (conditional complexity)

func unpackZip(archivePath string, destPath string) (error, bool) {
	zipReader, err := zip.OpenReader(archivePath)
	if err != nil {
		return err, true
	}
	defer func(zipReader *zip.ReadCloser) {
		err = zipReader.Close()
		if err != nil {
			log.Fatal(err)
		}
	}(zipReader)

	for _, f := range zipReader.File {
		fpath := filepath.Join(destPath, f.Name)

		// Check for Path Traversal
		if !strings.HasPrefix(fpath, filepath.Clean(destPath)+string(os.PathSeparator)) {
			return fmt.Errorf("%s: illegal file path", fpath), true
		}

		if f.FileInfo().IsDir() {
			err = os.MkdirAll(fpath, os.ModePerm)
			if err != nil {
				return err, true
			}
			continue
		}

		if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); err != nil {
			return err, true
		}

		dst, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
		if err != nil {
			return err, true
		}

		src, err := f.Open()
		if err != nil {
			return err, true
		}

		_, err = io.Copy(dst, src)
		if err != nil {
			return err, true
		}

		err = dst.Close()
		if err != nil {
			return err, true
		}
		err = src.Close()
		if err != nil {
			return err, true
		}
	}
	return nil, false
}