#!/bin/bash

# wipe all disks and delete all efi boot entries

read -p "wipe all disks? (y|n)" -n 1 -r
echo ""

if [[ $REPLY =~ ^[Yy]$ ]]
then
    sudo apt update
    sudo apt install -y gdisk efibootmgr jq

    echo ""

    for disk in /sys/block/*; do
        dev=$(basename "$disk")
        if [[ $dev == loop* || $dev == ram* || $dev == sr* ]]; then
            continue
        fi
        disk="/dev/$dev"

        partitions=$(lsblk $disk --json | jq -r '.blockdevices[].children[]?.name')

        for partition in $partitions; do
            echo "wiping $disk/$partition"
            sudo wipefs -af "$disk/$partition"
        done

        echo "wiping $disk"
        sudo wipefs -af $disk
        sudo blkdiscard -f $disk
        sudo sgdisk --zap-all $disk
        echo ""
    done
fi

efibootmgr | grep debian | grep -oP "(?<=Boot)[0-9a-fA-F]+" | xargs -I% efibootmgr -b % --delete-bootnum