macOS: Watches the content of the clipboard every 0.5 seconds and print it out to the general output.

clipboard_watcher.sh

#!/bin/bash

LAST_TEXT=

while :
do
    CURRENT_TEXT=`pbpaste`
    if [ "$LAST_TEXT" != "$CURRENT_TEXT" ]
    then
        echo $CURRENT_TEXT
        echo ""
        LAST_TEXT=$CURRENT_TEXT
    fi
    sleep 0.5
done