}
	return fut.pkg, fut.err
}

// firstComment returns the contents of the first non-empty comment in
// the given file, "skip", or the empty string. No matter the present
// comments, if any of them contains a build tag, the result is always
// "skip". Only comments before the "package" token and within the first
// 4K of the file are considered.
func firstComment(filename string) string {
	f, err := os.Open(filename)

	}
	return fut.pkg, fut.err
}

// firstComment returns the contents of the first non-empty comment in
// the given file, "skip", or the empty string. No matter the present
// comments, if any of them contains a build tag, the result is always
// "skip". Only comments within the first 4K of the file are considered.
// TODO(gri) should only read until we see "package" token.
func firstComment(filename string) (first string) {