class Ideone {
    static void main(String[] args) {
		String fullRpmName = "pkg-name.0.15.0-6.x86_64.rpm"
		def matcher = fullRpmName =~ /^((.*?)\..*)\.x86_64\.rpm/
		if (matcher) {
		    println matcher.group(2) // pkg-name
		    println matcher.group(1) // pkg-name.0.15.0-6
		}
    }
}