Create the target directory tree structure based on an indent-aligned text file.

mktree.py

#!/usr/bin/env python3
"""Create the target directory tree structure based on an indent-aligned text file.

Usage
-----
    python mktree.py tree[.txt]

Test demo
-----------------
    $ cat tree
    ---------------------------------
    # This is a comment line
    parent
        children  # Ha, I'm a comment
            test1
            test2
        another-one
            test3
            test4
        file.py
    test5
    ---------------------------------

    $ [python] ./mktree.py tree

Notes
-----
    The default accepted indent width is four spaces or a tab.
"""
from pathlib import Path
import re
import sys


def mktree(file):
    tree = []
    depth_upperbound = -1
    lines = open(file, 'r').readlines()
    for line in lines:
        matched = re.search('^ *', line)
        num_spaces = len(matched.group(0))
        depth = int(num_spaces // 4)
        basename = line.strip()
        if depth == depth_upperbound + 1:
            tree.append([])
            depth_upperbound = depth
        # Handle the comment line case
        basename = basename.split('#')[0]
        if basename:  # Ignore if it's a comment line
            basename = Path(basename.strip())
            tree[depth].append(basename)
            while depth:
                basename = Path(f'{tree[depth - 1][-1]}/{basename}')
                depth -= 1
            print(basename)
            if basename.suffix:
                basename.touch()
            else:
                basename.mkdir(exist_ok=True)

        print(tree)


if __name__ == '__main__':
    file = sys.argv[1]
    mktree(file)