Check version of a Github project and email (using cron)

check_version.sh

#!/bin/bash
  
# check_version.sh - check github project for latest release version from cron & email

url="https://github.com/USER/REPO/releases/latest"
txt="/tmp/release.txt"
prj="$(echo $url | awk -F "/" '{print $4 "/" $5}')"
cmd="$(curl -sL -o /dev/null -w "%{url_effective}" ${url} | awk -F "/" '{print $NF}')"

if [ ! -f "$txt" ]; then
    echo -n "Latest release: "
    echo "$cmd" | tee "$txt"
else
    if ! [[ "$cmd" =~ $(cat $txt) ]]; then
        # TODO: add send email command
        echo -n "Different versions send email! Repo $prj new version: "
        echo "$cmd" | tee "$txt"
    fi
fi

#EOF