#!/bin/bash

set -eux

if [ -d /media/8097-54BA ]
then
    dest_dir=/media/8097-54BA/Music
elif [ -d /media/dstromberg/8097-54BA ]
then
    dest_dir=/media/dstromberg/8097-54BA/Music
elif [ -d /media/dstromberg/7E7D-8C05 ]
then
    dest_dir=/media/dstromberg/7E7D-8C05/Music
elif [ -d /media/7E7D-8C05/Music ]
then
    dest_dir=/media/7E7D-8C05/Music
elif [ -d "/media/HP USB FD" ]
then
    dest_dir="/media/HP USB FD/Music/"
elif [ -d "/mnt/Car/Music" ]
then
    dest_dir="/mnt/Car/Music/"
else
    echo "$0: No car drive found" 1>&2
    exit 1
fi

cd ~/sound || exit 1

source_dir=~/sound/avconv-Music

case 3 in
    1)
        # this never really worked that well (lots of things retransferred unnecessarily), and gprog gives better progress info
        # I've not yet tried it with this large --modify-window though.
        #
        # A modify window of 1 was too short, but 5 seems to work well.
        cd "$source_dir" && \
            rsync \
                -rtuv \
                '--omit-dir-times' \
                --size-only \
                --delete \
                '--modify-window'=5 \
                --progress \
                --stats \
                . "$dest_dir"
        ;;
    2)
        rm -rf "$dest_dir"
        mkdir "$dest_dir"
        (cd "$source_dir" && 'gprog-du-tar' --directories * ) | \
                (cd "$dest_dir" && tar xvfp -)
        ;;
    3)
        # Sort the files to get decent directory order, to facilitate "doing studio discographies".
        set -x
        rm -rf "$dest_dir"
        mkdir "$dest_dir"
        size_in_kilobytes=$(du -sk Minimal-Car-Music | awk ' { print $1 }')
        size_in_bytes=$(($size_in_kilobytes*1024))
        #(cd "$source_dir" && find . -name '*.mp3' -print0 | sort -z | tar --create --null --files-from -) | \
        (cd Minimal-Car-Music && find . -name '*.mp3' -print0 | sort -z | tar --create --null --files-from -) | \
                gprog --size-estimate "$size_in_bytes" | \
                (cd "$dest_dir" && tar xvf -)
        ;;
esac