CLI for publishing a message to a Pub/Sub topic
$ go install github.com/torkelrogstad/pub@latest$ pub topic dataThe Google Cloud project to operate in is determined either through the
-project flag, or through inspecting the output of
gcloud config list --format 'value(core.project)'.
If the data argument is a valid base64 byte slice, we decode it and send that data. Otherwise, the string itself is sent.