Script for finding dead urls used as images in notes, it also detects used web links (I prefer to use images as local copy in my notes)

mddeadimglinks.py

import argparse
import logging
import os
import re

logging.basicConfig(level=logging.INFO)

def note_files(path):
    for root, dirs, files in os.walk(path):
        for file in files:
            if file.endswith(".md"):
                yield os.path.join(root, file)

def find_dead_links(note: str, note_dir: str):
    p = re.compile(r"!\[.*?\]\((.*?)\)")
    matches = p.findall(note)
    
    results = []
    for link in matches:
        # complete path
        if link[0] == "/":
            p = link
            if not os.path.exists(p):
                results.append(p)
        
        # url
        elif str.startswith(link, "http"):
            results.append(link)
        
        # relative path
        else:
            p = os.path.join(os.path.dirname(note_dir), link)
            if not os.path.exists(p):
                results.append(p)
    
    # print all dead urls
    if len(results) > 0:
        logging.info(f"[+] Dead local urls OR web urls: {note_dir}\n" + "\n".join(results))


def scan_notes(path: str):
    for note in note_files(path):
        with open(note, 'r') as f:
            find_dead_links(f.read(), note)


def main():
    parser = argparse.ArgumentParser(description="Find deadlinks in markdown notes")
    parser.add_argument('DIR', help="Directory containing markdown notes")
    args = parser.parse_args()

    mdnotesdir = args.DIR
    if not os.path.exists(mdnotesdir):
        logging.error(f"Path: '{mdnotesdir}' doesn't exists")
    else:
        scan_notes(mdnotesdir)

if __name__ == "__main__":
    main()