40 lines
1.6 KiB
Python
40 lines
1.6 KiB
Python
"""Canonical filesystem locations, resolved once from the repo root.
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Every path the backend needs (the climate cache, the accounts DB, logs, the
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bundled city data) is derived here from the repository root rather than from
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each module's own ``__file__``. That keeps the locations stable no matter how
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deep in the package tree a module lives, so moving a module never silently
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re-points the cache or the accounts DB.
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Callers that support an environment override (e.g. ``THERMOGRAPH_ACCOUNTS_DB``)
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keep doing so; these are only the defaults.
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"""
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import os
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_HERE = os.path.dirname(os.path.abspath(__file__))
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def _repo_root() -> str:
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"""Walk up from this file until a directory holds both ``backend/`` and
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``frontend/`` — the repository root, in every checkout (dev, prod, worktree)."""
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d = _HERE
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while True:
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if os.path.isdir(os.path.join(d, "backend")) and os.path.isdir(os.path.join(d, "frontend")):
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return d
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parent = os.path.dirname(d)
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if parent == d:
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raise RuntimeError(
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"cannot locate the repo root (no ancestor has sibling backend/ and frontend/)"
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)
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d = parent
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REPO_DIR = _repo_root()
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BACKEND_DIR = os.path.join(REPO_DIR, "backend")
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DATA_DIR = os.path.join(REPO_DIR, "data")
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LOGS_DIR = os.path.join(REPO_DIR, "logs")
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# Bundled reference data shipped alongside the code (generated by gen_cities /
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# gen_flavor), not runtime state — hence under backend/, not data/.
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CITIES_JSON = os.path.join(BACKEND_DIR, "cities.json")
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CITIES_FLAVOR_JSON = os.path.join(BACKEND_DIR, "cities_flavor.json")
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