CLI for publishing a message to a Pub/Sub topic

$ go install github.com/torkelrogstad/pub@latest

$ pub topic data

The 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.