make a .tar.gz snapshot of a specific minecraft world, and copy to dropbox dir

make_minecraft_snapshot.sh

#!/bin/bash

save_dir="$HOME/Library/Application Support/minecraft/saves"
dropbox_dir="$HOME/Dropbox/minecraft/world1_backups/"
dest_file=$( date '+%Y%m%d_%H%M%S.tar.gz' )

world=$1
test -z "$world" && world=World1

cd "$save_dir"
target_size=$(du -sb "$world" | awk '{print $1}')
( tar -cf - "$world" | pv -N $dest_file -s $target_size | gzip ) > /tmp/$dest_file
mv -v /tmp/$dest_file "$dropbox_dir/"