Used on my system to run a command on any change in a file in the current directory

roc.bash

#!/bin/bash

# RUN ON CHANGE

if [[ "$unamestr" == 'Linux' ]]; then
   while [ 1 ]; do
	clear\
	&& echo "[Running \"$@\" on files changes in $(pwd) at $(date +'%r')]"\
	&& echo ""\
	&& echo "$@" > /home/seve/Desktop/lastroc.sh\
	&& bash /home/seve/Desktop/lastroc.sh \
	&& sleep .3;
	inotifywait -r -q -e modify,move,create .;
   done
elif [[ "$unamestr" == 'Darwin' ]]; then
   while [ 1 ]
   do
      clear \
      && echo "[Running \"$@\" on files changes in $(pwd) at $(date +'%r')]"\
      && echo ""\
      && $@\
      && sleep .3;
      fswatch -r --one-event .;
   done
fi