machfs/bin/DumpHFS

#!/usr/bin/env python3

import argparse
import os
import os.path as path
from machfs import Volume, Folder, File
import macresources

def any_exists(at_path):
	if path.exists(at_path): return True
	if path.exists(at_path + '.rdump'): return True
	if path.exists(at_path + '.idump'): return True
	return False

args = argparse.ArgumentParser()

args.add_argument('src', metavar='INPUT', nargs=1, help='Disk image')
args.add_argument('dir', metavar='OUTPUT', nargs=1, help='Destination folder')

args = args.parse_args()

with open(args.src[0], 'rb') as f:
	v = Volume()
	v.read(f.read())

written = []
for p, obj in v.iter_paths():
	nativepath = path.join(args.dir[0], *(comp.replace(path.sep, ':') for comp in p))

	if isinstance(obj, Folder):
		os.makedirs(nativepath, exist_ok=True)

	elif obj.mddate != obj.bkdate or not any_exists(nativepath):
		data = obj.data
		if obj.type == b'TEXT':
			data = data.decode('mac_roman').replace('\r', os.linesep).encode('utf8')

		rsrc = obj.rsrc
		if rsrc:
			rsrc = macresources.parse_file(rsrc)
			rsrc = macresources.make_rez_code(rsrc, ascii_clean=True)
		
		info = obj.type + obj.creator
		if info == b'????????': info = b''

		for thing, suffix in ((data, ''), (rsrc, '.rdump'), (info, '.idump')):
			wholepath = nativepath + suffix
			if thing or (suffix == '' and not rsrc):
				written.append(wholepath)
				with open(written[-1], 'wb') as f:
					f.write(thing)
			else:
				try:
					os.remove(wholepath)
				except FileNotFoundError:
					pass

if written:
	t = path.getmtime(written[-1])
	for f in written:
		os.utime(f, (t, t))