helper application to subscribe to a pubsub and write incoming messages to time rolled files.
source pubsub should output non-multipart, chunked data where each message is newline terminated.
--pubsub-url=<str> source pubsub url in the form of
http://domain.com:port/path
--filename-format=<str> output filename format (strftime compatible)
/var/log/pubsub.%%Y-%%m-%%d_%%H.log
--version