# src/codegraphcontext/utils/git_utils.py

"""Lightweight git helpers used across the indexing pipeline."""

from __future__ import annotations

import subprocess

from pathlib import Path

from typing import Optional

def get_repo_commit_hash(repo_path: Path) -> Optional[str]:

"""Return the full HEAD commit SHA for *repo_path*, or ``None`` if the path

is not inside a git working tree or the ``git`` binary is unavailable.

This function is intentionally silent — it never raises; callers that need

the hash for non-critical enrichment can safely ignore a ``None`` return.

"""

try:

sha = subprocess.check_output(

["git", "rev-parse", "HEAD"],

cwd=repo_path,

stderr=subprocess.DEVNULL,

).decode().strip()

return sha if sha else None

except (subprocess.CalledProcessError, FileNotFoundError, OSError):

return None