This script takes a json object from stdin and turns it into a directory tree of files.

json-to-directory.py

#!/usr/bin/env python3
# by: Cody Kochmann
# created: 2023-10-01
# license: MIT

'''
  This script takes a json object from stdin and turns it into a directory tree of files.
'''

import sys, json, os, contextlib

@contextlib.contextmanager
def pushd(dir):
	assert isinstance(dir, str), dir
	assert os.path.isdir(dir), dir
	current_directory = os.getcwd()
	try:
		print(f'{current_directory} -> {dir}', file=sys.stderr)
		os.chdir(dir)
		yield
	finally:
		print(f'{current_directory} <- {dir}', file=sys.stderr)
		os.chdir(current_directory)

def is_collection(o):
	return isinstance(o, (list, dict))

def write_to_file(obj, key):
	assert isinstance(obj, str), obj
	assert isinstance(key, str), key
	print(f'writing {obj} to {key}', file=sys.stderr)
	with open(key, 'w') as f:
		f.write(obj)

def materialize_str(obj, key):
	assert isinstance(obj, str), obj
	assert isinstance(key, str), key
	return write_to_file(obj, key)

def materialize_int(obj, key):
	assert isinstance(obj, int), obj
	assert isinstance(key, str), key
	return write_to_file(str(obj), key)

def materialize_float(obj, key):
	assert isinstance(obj, float), obj
	assert isinstance(key, str), key
	return write_to_file(str(obj), key)

def materialize_bool(obj, key):
	assert isinstance(obj, bool), obj
	assert isinstance(key, str), key
	return write_to_file(str(obj), key)

def materialize_none(obj, key):
	assert isinstance(obj, type(None)), obj
	assert isinstance(key, str), key
	return write_to_file(str(obj), key)

def materialize_list(obj):
	assert isinstance(obj, list), obj
	for i, v in enumerate(obj):
		if is_collection(v):
			os.mkdir(str(i))
			with pushd(str(i)):
				materialize(v)
		else:
			materialize(v, str(i))


def materialize_dict(obj):
	assert isinstance(obj, dict), obj
	for i, v in obj.items():
		if is_collection(v):
			os.mkdir(str(i))
			with pushd(str(i)):
				materialize(v)
		else:
			materialize(v, str(i))

def materialize(o, *key):
	assert isinstance(o, (list,dict,int,str,bool,float,type(None))), o
	materializer = {
		list: materialize_list,
		dict: materialize_dict,
		int: materialize_int,
		float: materialize_float,
		str: materialize_str,
		bool: materialize_bool,
		type(None): materialize_none
	}[type(o)]
	if len(key) == 0:
		return materializer(o)
	else:
		assert len(key) == 1, key
		return materializer(o, *key)

def main():
	data = json.loads(sys.stdin.read())
	return materialize(data)

if __name__ == '__main__':
	main()