python script using pyfshfs to dump a hfs disk image that macos could not mount

export-hfs.py

# used this on an ubuntu docker image with `apt install python3-libfshfs`

import pyfshfs
import os

def export_file(entry, dest):
    print(f'export {dest}')
    dir = os.path.dirname(dest)
    if not os.path.exists(dir):
        os.makedirs(dir)
    with open(dest, "wb") as file:
        file.write(entry.read())

def export_dir(entry, dest):
    print(f'export dir {dest} (id {entry.identifier:X}, file_mode {entry.file_mode & 0xf000:X})')
    dirs = []
    for i in range(entry.get_number_of_sub_file_entries()):
        child = entry.get_sub_file_entry(i)
        if child.file_mode & 0x4000:
            export_dir(child, f'{dest}/{child.name}')
        elif child.file_mode & 0x8000:
            export_file(child, f'{dest}/{child.name}')
        else:
            print(f'error: unsupported file type {dest}: {entry.file_mode}')


volume = pyfshfs.open("/data/store.img")
root = volume.get_root_directory()

export_dir(root, "/data/store-export")