toaruos/util/update-extents.krk

#!/usr/bin/env kuroko
import fileio
from util import ISO, FAT

let image = ISO('image.iso')
let fat = image.root.find('FAT.IMG')
let fatfs = FAT(image, fat.extent_start_lsb * image.sector_size)

def process(fatfile, path):
    if fatfile.is_long():
        return
    if fatfile.readable_name() == '.':
        return
    if fatfile.readable_name() == '..':
        return
    if fatfile.is_dir():
        for i in fatfile.to_dir().list():
            process(i, path + fatfile.readable_name() + '/')
    else:
        let cdfile = image.get_file(path + fatfile.readable_name())
        if not cdfile:
            if fatfile.readable_name() != 'bootia32.efi' and fatfile.readable_name() != 'bootx64.efi':
                print("Warning:", fatfile.readable_name(), "not found in ISO")
        else:
            cdfile.extent_start_lsb = fatfile.get_offset() // 2048
            cdfile.extent_length_lsb = fatfile.filesize
            cdfile.write_extents()


for i in fatfs.root.list():
    process(i,'/')

with fileio.open('image.iso','wb') as f:
    f.write(bytes(image.data))