Locally Downloading All Reverse Dependencies with Apt-Get

#!/bin/bash
export MAXPARAMETERS=255

function array_contains_find_index() {
    local n=$#
    local i=0
    local value=${!n}

    for (( i=1; i < n; i++ )) {
    if [ "${!i}" == "${value}" ]; then
        echo "REMOVING $i: ${!i} = ${value}"
        return $i
    fi
    }
    return $MAXPARAMETERS
}

function Pause() {
    if [[ -z $1 ]]; then
        read -n1 -r -p "continue..."
    else
        read -n1 -r -p "$1"
    fi
}

export IFS=$'\n'
# Store all reverse dependencies in an indexed array and output them to STDOUT & a log file
# for easy checking later
LIST=( $( apt-rdepends $1 | grep -v "^ " ) )
echo ${LIST[*]}
echo ${LIST[*]} > getdepends.log.results
Pause "... Packages that will be downloaded (Continue or CTRL+C) ..."

# Try to download the dependencies
RESULTS=( $( apt-get download ${LIST[*]} |& cut -d' ' -f 8 ) )

# If RESULTS contains any items that means we have packages that are
# problematic that need to be removed from LIST. (note: `|&` is shortform for `2>&1 |`)

LISTLEN=${#LIST[@]}                 #Array elements aren't removed so the size is constant

while [ ${#RESULTS[@]} -gt 0 ]; do
    for (( i=0; i < $LISTLEN; i++ )); do
        array_contains_find_index ${RESULTS[@]} ${LIST[$i]}
        ret=$?

        if (( $ret != $MAXPARAMETERS )); then
            unset LIST[$i]
        fi
    done

    FULLRESULTS=$( apt-get download ${LIST[*]} 2>&1  )
    RESULTS=( $( echo $FULLRESULTS |& cut -d' ' -f 11 | sed -r "s/'(.*?):(.*$)/\1/g" ) )

    echo ${LIST[*]} > getdepends.list                   #Log of downloaded packages
    echo ${FULLRESULTS[*]} >> getdepends.fullresults    #Verbose log of skipped packages
    echo ${RESULTS[*]} >> getdepends.results            #Just the name of skipped packages
done

apt-get download ${LIST[*]}