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Build Directory Md

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#!/usr/bin/env python3

import os
from collections.abc import Iterator


def good_file_paths(top_dir: str = ".") -> Iterator[str]:
    for dir_path, dir_names, filenames in os.walk(top_dir):
        dir_names[:] = [d for d in dir_names if d != "scripts" and d[0] not in "._"]
        for filename in filenames:
            if filename == "__init__.py":
                continue
            if os.path.splitext(filename)[1] in (".py", ".ipynb"):
                yield os.path.join(dir_path, filename).lstrip("./")


def md_prefix(i):
    return f"{i * '  '}*" if i else "\n##"


def print_path(old_path: str, new_path: str) -> str:
    old_parts = old_path.split(os.sep)
    for i, new_part in enumerate(new_path.split(os.sep)):
        if i + 1 > len(old_parts) or old_parts[i] != new_part:
            if new_part:
                print(f"{md_prefix(i)} {new_part.replace('_', ' ').title()}")
    return new_path


def print_directory_md(top_dir: str = ".") -> None:
    old_path = ""
    for filepath in sorted(good_file_paths(top_dir)):
        filepath, filename = os.path.split(filepath)
        if filepath != old_path:
            old_path = print_path(old_path, filepath)
        indent = (filepath.count(os.sep) + 1) if filepath else 0
        url = "/".join((filepath, filename)).replace(" ", "%20")
        filename = os.path.splitext(filename.replace("_", " ").title())[0]
        print(f"{md_prefix(indent)} [{filename}]({url})")


if __name__ == "__main__":
    print_directory_md(".")