PortValhalla/scripts/Common/Scripts/choose-disk.sh

#!/bin/bash
function chooseDisk() {
    local -n result="$1";
    local message="$2";
    local choice;
    local disk;
    local -a disks;
    local i;
    disks=();

    while read disk
    do
        local -a diskInfo;
        diskInfo=($disk);

        if [ "${diskInfo[2]}" == "TYPE" ] || [ "${diskInfo[2]}" == "disk" ]
        then
            disks+=("$disk");
        fi;
    done < <(lsblk -do NAME,SIZE,TYPE);

    diskCount="$(expr "${#disks[@]}" - 1)";
    padding="${#diskCount}";

    if [ "$diskCount" -gt 0 ]
    then
        while true
        do
            echo "$message";

            for i in $(seq 0 "$(expr "$diskCount")")
            do
                local index;
                if [ "$i" -eq 0 ]
                then
                    index="";
                else
                    index="$i:";
                fi;

                printf "%$(expr "${diskCount}" + 1)s ${disks[$i]}" "$index";
                echo "";
            done;

            read -p "Your choice: " choice;

            if [ "$choice" -ge 1 ] && [ "$choice" -le "$diskCount" ]
            then
                disk=(${disks[$choice]});
                result="/dev/${disk[0]}";
                return;
            else
                >&2 echo "The specified choice \"$choice\" is invalid!";
            fi;
        done;
    else
        >&2 echo "No valid disk found!";
    fi;
}