A naive script to walk the current directory looking for Standard Notes txt files and renaming them to be either md or html files with cleaned up names

rename.py

# Copyright (c) 2020 Wyatt Childers.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
import re

def detect_extension(file_path):
    with open(file_path) as f:
        while True:
            c = f.read(1)
            if c.isspace():
                continue
            
            if c == '<':
                return '.html'
            else:
                return '.md'

file_match_regex = re.compile("(.*)(-[a-z0-9]+.txt)$")
for dirpath, dirnames, filenames in os.walk('.'):
    for filename in filenames:
        match = file_match_regex.search(filename)
        if not match:
            continue

    
        file_path = os.path.join(dirpath, filename)

        true_file_ext = detect_extension(file_path)
        base_file_name = match.group(1)
        
        
        new_file_path = os.path.join(dirpath, base_file_name + true_file_ext)
        
        os.rename(file_path, new_file_path)