Backup script for external hard drives

bkexternal.sh

bkexternal () {
    HOST=$(hostname -s)

    EXT_DRIVE_PATH="/Volumes/RsyncBackupDrive"
    if [[ ! -e "$EXT_DRIVE_PATH" ]]; then
        echo "Drive path not found: $EXT_DRIVE_PATH"
        return 1
    fi

    # Helpful cheat sheet: https://devhints.io/rsync
    rsync -avz --delete --delete-excluded \
        --exclude 'Applications' \
        --exclude '.DS_Store' \
        --exclude '.Trash' \
        --exclude 'Library' \
        "$HOME/" \
        "$EXT_DRIVE_PATH/backup-$HOST"

    local return_code=$?
    if [[ $return_code -ne 0 ]]; then
        return 1
    fi

    date > "$EXT_DRIVE_PATH/backup-$HOST-last-backup.txt"
}