Watch for file changes and do something

watch.sh

#!/bin/bash

# This script requires [entr](http://entrproject.org): `brew install entr`
# Tested on macOS Mojave

while true; do
    # Watch for files changes or new files in the current directory, except in ./dist, ./vendor and ./.git, and execute ./do-something.sh
    find . \( -path "./dist" -o -path "./vendor" -o -path "./.git" \) -prune -o -print | entr -d ./do-something.sh
done