Sync crontab using pastebin service

crontab-sync.sh

#!/usr/bin/env bash
# Sync crontab using pastebin service
# Victor Oliveira <[email protected]>


CRONFILE="/tmp/crontab.old"
CRONFILENEW="/tmp/crontab.new"
PBURL="https://pastebin.com/raw/YOUR_PASTE"


# Download crontab from pastebin
curl -s "${PBURL}" > "${CRONFILENEW}" || {
    echo "Failed to download crontab file"
    exit 1
}

# Convert ISO8859 to UTF8
dos2unix -q "${CRONFILENEW}"

# Check for changes
crontab -l > "${CRONFILE}"
diff -q "${CRONFILE}" "${CRONFILENEW}" &> /dev/null && {
    rm -rf "${CRONFILE}" "${CRONFILENEW}"
    exit 0
}

# Ensure crontab sync
grep "\*/5 \* \* \* \* ./scripts/crontab-sync.sh" "${CRONFILENEW}" &> /dev/null || {
    echo >> "${CRONFILENEW}"
    echo "# Crontab Sync" >> "${CRONFILENEW}"
    echo "*/5 * * * * ./scripts/crontab-sync.sh" >> "${CRONFILENEW}"
}

# Install new crontab
cat "${CRONFILENEW}" | crontab

# Clean temp files
rm -rf "${CRONFILE}" "${CRONFILENEW}"