,ignore

#!/usr/bin/env python3

"""Adds a file to a `.gitignore` file."""

import argparse
import os
import sys
import subprocess
from pathlib import Path
from textwrap import dedent

parser = argparse.ArgumentParser()
parser.add_argument('file',
                    help='The file to add to the .gitignore file')
args = parser.parse_args()

file = args.file

def main():
    # create a .gitignore if it does not already exist
    cwd = os.getcwd()
    cwd = Path(cwd)
    files = set(x.name for x in cwd.iterdir() if x.is_file())
    if '.gitignore' not in files:
        prompt = dedent(f"""
        A .gitignore file was not found in this location.
        Create one? (y/n): 
        """)
        while True:
            response = input(prompt).strip().lower()
            if response not in ('y', 'n'):
                continue
            elif response == 'n':
                sys.exit('No changes were made. Goodbye!')
            else:
                break
        create_gitignore(file)

    with open('.gitignore', 'a', encoding='utf-8') as f:
        print(f'Adding `{file}` to .gitignore')
        subprocess.run(['echo', file], stdout=f, text=True)
        print('Done!')


def create_gitignore(file):
    print('Creating `.gitignore` file...')
    subprocess.run(['touch', '.gitignore'])


def append_to_ignore(file):
    pass


if __name__ == '__main__':
    main()