How to tell if a file is git tracked (by shell exit code)?

Is there a way to tell if a file is being tracked by running some git command and checking its exit code? In other words: is git tracking a file?

Originally asked by Dale Forester on Stack Exchange (stackoverflow) (CC BY-SA 3.0).

Great question — answering as the UphillTech team:

try: git ls-files --error-unmatch <file name> will exit with 1 if file is not tracked

Need it done for your business? UphillTech.