anti
f2b3393669
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends `SPDX-License-Identifier: AGPL-3.0-or-later` to every source file across decnet/, decnet_web/, tests/, scripts/, and tools/. Rationale: closes the GPLv3 ASP loophole so any party operating a modified DECNET as a network service must offer their modified source. Personal copyright (Samuel Paschuan) + inbound=outbound contributions make a future unilateral relicense infeasible. - LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt) - COPYRIGHT: project copyright notice - tools/add_spdx_headers.py: idempotent header injector (shebang- and PEP 263-aware) Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh). No behavior change; comments only.
75 lines
2.9 KiB
Python
75 lines
2.9 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Vectorstore factory — selects a :class:`BaseVectorStore` implementation.
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Dispatch keys:
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* ``DECNET_VECTORSTORE_ENABLED`` — ``"false"`` short-circuits to
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:class:`~decnet.vectorstore.fake.NullVectorStore`. Default ``"true"``.
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* ``DECNET_VECTORSTORE_TYPE`` — ``"sqlite_vec"`` (default) or
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``"fake"``.
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* ``DECNET_VECTORSTORE_PATH`` — sqlite file path. Defaults to
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``/var/lib/decnet/vectors.sqlite`` if writable, else
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``~/.decnet/vectors.sqlite``.
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Mirrors :mod:`decnet.bus.factory` and :mod:`decnet.web.db.factory`:
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lazy imports inside each branch, env-driven dispatch, callers MUST go
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through :func:`get_vectorstore` rather than instantiating backends.
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If ``sqlite_vec`` is requested but the extension is unavailable on
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this host, the factory logs a warning and returns the fake backend
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instead — the caller's code path stays valid (``insert`` no-ops, etc.)
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without crashing the worker on a missing optional dependency.
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"""
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from __future__ import annotations
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import logging
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import os
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from typing import Any
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from decnet.vectorstore.base import BaseVectorStore
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LOG = logging.getLogger(__name__)
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def get_vectorstore(**kwargs: Any) -> BaseVectorStore:
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if os.environ.get("DECNET_VECTORSTORE_ENABLED", "true").lower() == "false":
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from decnet.vectorstore.fake import NullVectorStore
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return NullVectorStore()
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backend = os.environ.get("DECNET_VECTORSTORE_TYPE", "sqlite_vec").lower()
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if backend == "fake":
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from decnet.vectorstore.fake import FakeVectorStore
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return FakeVectorStore()
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if backend == "sqlite_vec":
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# Probe extension availability up front so the factory can fall
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# back cleanly. Construction is cheap, but the extension load
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# only happens in initialize(); without this probe the caller
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# sees the failure too late to substitute a backend.
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try:
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import sqlite_vec # noqa: F401
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except ImportError as e:
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LOG.warning(
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"sqlite_vec not installed (%s); falling back to FakeVectorStore. "
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"Install the sqlite-vec package or set "
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"DECNET_VECTORSTORE_TYPE=fake to silence this warning.", e,
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)
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from decnet.vectorstore.fake import FakeVectorStore
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return FakeVectorStore()
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from decnet.vectorstore.sqlite_vec import SqliteVecVectorStore
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db_path = kwargs.pop("db_path", None) or _default_db_path()
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return SqliteVecVectorStore(db_path=db_path)
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raise ValueError(f"Unsupported vectorstore type: {backend}")
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def _default_db_path() -> str:
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explicit = os.environ.get("DECNET_VECTORSTORE_PATH")
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if explicit:
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return explicit
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runtime_dir = "/var/lib/decnet"
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if os.path.isdir(runtime_dir) and os.access(runtime_dir, os.W_OK):
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return f"{runtime_dir}/vectors.sqlite"
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return os.path.expanduser("~/.decnet/vectors.sqlite")
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