golang wit https://github.com/fabric8-services/fabric8-wit/blob/master/search/search_repository.go

search.go

func RegisterAsKnownURL(name, urlRegex string) {
	compiledRegex := regexp.MustCompile(urlRegex)
	groupNames := compiledRegex.SubexpNames()
	knownURLLock.Lock()
	defer knownURLLock.Unlock()
	knownURLs[name] = KnownURL{
		URLRegex:          urlRegex,
		compiledRegex:     regexp.MustCompile(urlRegex),
		groupNamesInRegex: groupNames,
	}
}