convert_tag_format.py

"""
Fixes tags that were converted to links during Obsidian import.

Specifically, it is the first 3 line and the line contains "tags:", convert all [[tag name]] to #tag-name
"""
import os
import re
from pathlib import Path

DIR = '/Users/eugeneya/obsidian-vault/'
double_square = re.compile("\[\[(.*?)\]\]")

for file_i, path in enumerate(Path(DIR).glob('*.md')):
    file_name = str(path).split("/")[-1]

    file_handler = open(path)
    for line_i, line in enumerate(file_handler):
        if line_i < 2 and ('tags:' in line or 'tag:' in line):
            tag_line = line

            tags = double_square.findall(line)
            if tags:
                print(f'file {file_i}: {file_name}')

            new_tag_line = '- tags:: '
            for tag in tags:
                new_tag_line += f'#{tag.replace(" ", "-")} '
            new_tag_line += '\n'
            print(new_tag_line)

            # Save Markdown file with new local file link as a temp file
            # If there is already a temp version of a file, open that.
            temp_file_path = DIR + '/temp_' + file_name
            if os.path.exists(temp_file_path):
                full_read = open(temp_file_path, errors='ignore')
            else:
                full_read = open(path, errors='ignore')
            data = full_read.read()
            data = data.replace(tag_line, new_tag_line)
            with open(temp_file_path, 'wt') as temp_file:
                temp_file.write(data)
            if os.path.exists(temp_file_path):
                os.replace(temp_file_path, path)
            full_read.close()

        if line_i >= 2:
            break

    file_handler.close()