31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
from __future__ import annotations
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from .common import assert_subpackage; assert_subpackage(__name__)
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from .common import PathIsh
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from .sqlite import sqlite_connect_immutable
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## sadly dataset doesn't have any type definitions
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from typing import Iterable, Iterator, Dict, Optional, Any, Protocol
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from contextlib import AbstractContextManager
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# NOTE: may not be true in general, but will be in the vast majority of cases
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row_type_T = Dict[str, Any]
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class TableT(Iterable, Protocol):
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def find(self, *, order_by: Optional[str]=None) -> Iterator[row_type_T]: ...
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class DatabaseT(AbstractContextManager['DatabaseT'], Protocol):
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def __getitem__(self, table: str) -> TableT: ...
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##
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# TODO wonder if also need to open without WAL.. test this on read-only directory/db file
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def connect_readonly(db: PathIsh) -> DatabaseT:
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import dataset # type: ignore
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# see https://github.com/pudo/dataset/issues/136#issuecomment-128693122
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# todo not sure if mode=ro has any benefit, but it doesn't work on read-only filesystems
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# maybe it should autodetect readonly filesystems and apply this? not sure
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creator = lambda: sqlite_connect_immutable(db)
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return dataset.connect('sqlite:///', engine_kwargs={'creator': creator})
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