mass-to-discs

#!/usr/bin/env bash

set -euo pipefail
set -x

EXIT_FAILURE=1
EXIT_SUCCESS=0

inputDir=mass

if [ ! -d "$inputDir" ]; then
    echo "$inputDir/ not found"
    exit $EXIT_FAILURE
fi

array=()
while IFS=  read -r -d $'\0'; do
    array+=("$REPLY")
done < <(find "$inputDir" -type f -print0 | sort -z)
sz=${#array[@]}
echo $sz

i=0
discNo=1
usedDiscSizeBytes=0
discSizeBytes=24689770416
discSizeBytes=4500000000
for (( i=0; i<$sz; i++ )); do
    originalPath="${array[$i]}"
    filename=$(basename ${array[$i]})
    fileSize=$(stat --printf="%s" "$originalPath")
    echo $fileSize
    usedDiscSizeBytes=$(expr $usedDiscSizeBytes + $fileSize)
    echo $usedDiscSizeBytes
    if [ $usedDiscSizeBytes -ge $discSizeBytes ]; then
        usedDiscSizeBytes=0
        discNo=$((discNo+1))
    fi

    mkdir -p "disc$discNo"
    cp -lv "$inputDir/$filename" "disc$discNo/$filename"
done

exit $EXIT_SUCCESS