def identify_hosting_service(repo_url, hosting_services=HOSTING_SERVICES):
repo_url = unicode(repo_url)<EOL>for service in hosting_services:<EOL><INDENT>if service in repo_url:<EOL><INDENT>return service<EOL><DEDENT><DEDENT>raise UnknownHostingService<EOL>
Determines the hosting service of `repo_url`.
:param repo_url: Repo URL of unknown type.
:returns: Hosting service or raises UnknownHostingService exception.