from argparse import ArgumentTypeError
import os
import subprocess

def get_full_path(relative_path):
    if not os.path.isabs(relative_path):
        current_dir = os.getcwd()
        full_path = os.path.join(current_dir, relative_path)
    else:
        full_path = relative_path
    
    return full_path

def dir_arg_type(path):
    full_path = get_full_path(path) 
    if os.path.isdir(full_path):
        return full_path
    else:
        raise ArgumentTypeError(f"{path} nor {full_path} are not a valid path")
    
def file_arg_type(path):
    full_path = get_full_path(path)
    if not os.path.isfile(full_path):
        raise ArgumentTypeError(f"{path} nor {full_path} are not a valid file")
    return full_path

def find_git_base_dir(starting_path=None):
    if starting_path is None:
        starting_path = os.getcwd()  
    try:
        base_dir = subprocess.check_output(
            ['git', 'rev-parse', '--show-toplevel'],
            cwd=starting_path,
            text=True
        ).strip()
        return base_dir
    except subprocess.CalledProcessError:
        return None