Know if we are running in REPL mode in click methods

[davetapley]

Is there a way to know if we are running in REPL mode in the click methods?

Ideally, I'd also like to know whether this is repl being invoked the first time, or we are in the REPL loop.

For context:
My CLI prints out some debug info on startup, which works great in normal CLI mode, but in REPL it prints out on every command, which is too much.