#!/bin/bash

orig_iso='/mini.iso'
iso_mnt='/mnt/iso'
new_files='/mnt/iso_new'
new_iso='/debian-12-my-preseed-amd64.iso'
mbr_template='/mnt/iso_new/isohdpfx.bin'


wget https://deb.debian.org/debian/dists/bookworm/main/installer-amd64/current/images/netboot/mini.iso -O /mini.iso

mkdir $iso_mnt
mkdir $new_files

mount -o loop /mini.iso $iso_mnt
cp -vRTa $iso_mnt $new_files
umount $iso_mnt

sed 's/\/linux vga=788 --- quiet/\/linux vga=788 ipv6.disable=1 auto=true netcfg\/dhcp_timeout=30 priority=critical locale=en_US preseed\/url=http:\/\/aassdd.ru\/.my-preseed\/debian\/preseed.cfg ---/' -i $new_files/boot/grub/grub.cfg
sed 's/append vga=788 initrd=initrd.gz --- quiet/append vga=788 initrd=initrd.gz ipv6.disable=1 auto=true netcfg\/dhcp_timeout=30 priority=critical locale=en_US preseed\/url=http:\/\/aassdd.ru\/.my-preseed\/debian\/preseed.cfg ---/' -i $new_files/txt.cfg

# ************************
# ************************

# Extract MBR template file to disk
dd if="$orig_iso" bs=1 count=432 of="$mbr_template"

# Create the new ISO image
xorriso -as mkisofs \
-r -V 'Debian my preseed amd64 n' \
-o "$new_iso" \
-J -J -joliet-long -cache-inodes \
-isohybrid-mbr "$mbr_template" \
-b isolinux.bin \
-c boot.cat \
-boot-load-size 4 -boot-info-table -no-emul-boot \
-eltorito-alt-boot \
-e boot/grub/efi.img \
-no-emul-boot -isohybrid-gpt-basdat -isohybrid-apm-hfsplus \
"$new_files"
# ************************
# ************************

rm -fr $orig_iso
rm -fr $iso_mnt
rm -fr $new_files