How do I watch a file for changes?

Question

I have a log file being written by another process which I want to watch for changes. Each time a change occurs I\'d like to read the new data in to do some processing on it

Answer 1

Seems that no one has posted fswatch. It is a cross-platform file system watcher. Just install it, run it and follow the prompts.

I've used it with python and golang programs and it just works.