#!/usr/bin/env python3
"""
Remove extra whitespace from a text file.

When I copy/paste text from the web into Obsidian, it's often inserted
with a lot of additional whitespace, e.g. text like

    hello\n\nworld

becomes

    hello\n\n  \n\nworld

This script cleans up some of this extraneous whitespace for me.
"""

import re
import sys


if __name__ == '__main__':
    try:
        path = sys.argv[1]
    except IndexError:
        sys.exit(f"Usage: {__file__} <path>")

    with open(path, "r") as infile:
        text = infile.read()

    text = re.sub(r"\n\n\s*\n\n", "\n\n", text)

    with open(path, "w") as outfile:
        outfile.write(text)