smash_f5.sh

#!/bin/bash
# Throw an alert when a page's contents have changed
#
# Requires https://github.com/alloy/terminal-notifier

DELAY="30"
URL="https://ftp.gnu.org/gnu/bash/bash-3.2-patches/?C=M;O=D"
CHECKSUM="d1476050bb854ad1d33ce539cd5214fc5c9802d3"

while true; do
    if [[ `curl -s "${URL}" | shasum` == "${CHECKSUM}  -" ]]; then
        echo "`date` - checksum has not changed - sleeping..."
    else
        terminal-notifier -message "bash updates RELEASED @ ${URL}" -title 'Bash updates!'
        break
    fi
    sleep ${DELAY}
done