"""Backend package facade: native Periscope + inherited PinScope.

``periscope/src/backend`` and ``periscope/dependency/backend`` are merged via
pkgutil path extension. Do not put application modules in this directory.
"""
from __future__ import annotations

import sys
from pathlib import Path
from pkgutil import extend_path

_REPO = Path(__file__).resolve().parents[1]
for _p in (_REPO / "periscope" / "src", _REPO / "periscope" / "dependency"):
    _s = str(_p)
    if _p.is_dir() and _s not in sys.path:
        sys.path.insert(0, _s)

__path__ = list(extend_path(__path__, __name__))