#!/usr/bin/env python3
"""Walk up the directory tree to find the first directory containing .git/config."""
import argparse
import logging
import os
import traceback
from typing import Tuple
from oats.log import cl
log = cl("find_git_config")
[docs]
def walk_up_dir_path_to_find_git_config(dir_path: str) -> Tuple[bool, str]:
"""Walk up the directory tree from *dir_path* to find the Git repository root.
Starting at the given directory, checks each ancestor for a ``.git/config``
file. Stops at the filesystem root if no Git repo is found.
Args:
dir_path: The directory to start the search from.
Returns:
``(True, repo_dir)`` with the absolute path to the repo root on success,
or ``(False, "")`` if no Git repository is found.
"""
try:
current = os.path.abspath(dir_path)
while True:
git_config = os.path.join(current, ".git", "config")
if os.path.isfile(git_config):
return True, current
parent = os.path.dirname(current)
if parent == current: # reached the filesystem root
return False, ""
current = parent
except Exception:
log.error(
f"### Sorry!! git/walk_up_dir_path_to_find_git_config.py "
f"Failed to find git repo config dir: {dir_path} with error:\n"
f"```\n{traceback.format_exc()}\n```\n"
)
return False, ""
[docs]
def main() -> None:
"""CLI entry point — walk up from the target directory and print the git repo root."""
parser = argparse.ArgumentParser(description="Walk up the directory tree to find the git repo root.")
parser.add_argument("-d", "--target_dir", default=".", help="Target directory to start walking up from (default: .)")
args = parser.parse_args()
success, repo_dir = walk_up_dir_path_to_find_git_config(args.target_dir)
if success:
print(repo_dir)
else:
print("", end="")
if __name__ == "__main__":
main()