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provision.py

# dialects/sqlite/provision.py
# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
# mypy: ignore-errors

import os
import re

from ... import exc
from ...engine import url as sa_url
from ...testing.provision import create_db
from ...testing.provision import drop_db
from ...testing.provision import follower_url_from_main
from ...testing.provision import generate_driver_url
from ...testing.provision import log
from ...testing.provision import post_configure_engine
from ...testing.provision import run_reap_dbs
from ...testing.provision import stop_test_class_outside_fixtures
from ...testing.provision import temp_table_keyword_args
from ...testing.provision import upsert

# TODO: I can't get this to build dynamically with pytest-xdist procs
_drivernames = {
    "pysqlite",
    "aiosqlite",
    "pysqlcipher",
    "pysqlite_numeric",
    "pysqlite_dollar",
}

def _format_url(url, driver, ident):
    """given a sqlite url + desired driver + ident, make a canonical
    URL out of it

"""
    url = sa_url.make_url(url)

if driver is None:
        driver = url.get_driver_name()

filename = url.database

needs_enc = driver == "pysqlcipher"
    name_token = None

if filename and filename != ":memory:":
        assert "test_schema" not in filename
        tokens = re.split(r"[_\.]", filename)

new_filename = f"{driver}"

for token in tokens:
            if token in _drivernames:
                if driver is None:
                    driver = token
                continue
            elif token in ("db", "enc"):
                continue
            elif name_token is None:
                name_token = token.strip("_")

assert name_token, f"sqlite filename has no name token: {url.database}"

new_filename = f"{name_token}_{driver}"
        if ident:
            new_filename += f"_{ident}"
        new_filename += ".db"
        if needs_enc:
            new_filename += ".enc"
        url = url.set(database=new_filename)

if needs_enc:
        url = url.set(password="test")

url = url.set(drivername="sqlite+%s" % (driver,))

return url

@generate_driver_url.for_db("sqlite")
def generate_driver_url(url, driver, query_str):
    url = _format_url(url, driver, None)

try:
        url.get_dialect()
    except exc.NoSuchModuleError:
        return None
    else:
        return url

@follower_url_from_main.for_db("sqlite")
def _sqlite_follower_url_from_main(url, ident):
    return _format_url(url, None, ident)

@post_configure_engine.for_db("sqlite")
def _sqlite_post_configure_engine(url, engine, follower_ident):
    from sqlalchemy import event

if follower_ident:
        attach_path = f"{follower_ident}_{engine.driver}_test_schema.db"
    else:
        attach_path = f"{engine.driver}_test_schema.db"

@event.listens_for(engine, "connect")
    def connect(dbapi_connection, connection_record):
        # use file DBs in all cases, memory acts kind of strangely
        # as an attached

# NOTE!  this has to be done *per connection*.  New sqlite connection,
        # as we get with say, QueuePool, the attaches are gone.
        # so schemes to delete those attached files have to be done at the
        # filesystem level and not rely upon what attachments are in a
        # particular SQLite connection
        dbapi_connection.execute(
            f'ATTACH DATABASE "{attach_path}" AS test_schema'
        )

@event.listens_for(engine, "engine_disposed")
    def dispose(engine):
        """most databases should be dropped using
        stop_test_class_outside_fixtures

however a few tests like AttachedDBTest might not get triggered on
        that main hook

"""

if os.path.exists(attach_path):
            os.remove(attach_path)

filename = engine.url.database

if filename and filename != ":memory:" and os.path.exists(filename):
            os.remove(filename)

@create_db.for_db("sqlite")
def _sqlite_create_db(cfg, eng, ident):
    pass

@drop_db.for_db("sqlite")
def _sqlite_drop_db(cfg, eng, ident):
    _drop_dbs_w_ident(eng.url.database, eng.driver, ident)

def _drop_dbs_w_ident(databasename, driver, ident):
    for path in os.listdir("."):
        fname, ext = os.path.split(path)
        if ident in fname and ext in [".db", ".db.enc"]:
            log.info("deleting SQLite database file: %s", path)
            os.remove(path)

@stop_test_class_outside_fixtures.for_db("sqlite")
def stop_test_class_outside_fixtures(config, db, cls):
    db.dispose()

@temp_table_keyword_args.for_db("sqlite")
def _sqlite_temp_table_keyword_args(cfg, eng):
    return {"prefixes": ["TEMPORARY"]}

@run_reap_dbs.for_db("sqlite")
def _reap_sqlite_dbs(url, idents):
    log.info("db reaper connecting to %r", url)
    log.info("identifiers in file: %s", ", ".join(idents))
    url = sa_url.make_url(url)
    for ident in idents:
        for drivername in _drivernames:
            _drop_dbs_w_ident(url.database, drivername, ident)

@upsert.for_db("sqlite")
def _upsert(
    cfg, table, returning, *, set_lambda=None, sort_by_parameter_order=False
):
    from sqlalchemy.dialects.sqlite import insert

stmt = insert(table)

if set_lambda:
        stmt = stmt.on_conflict_do_update(set_=set_lambda(stmt.excluded))
    else:
        stmt = stmt.on_conflict_do_nothing()

stmt = stmt.returning(
        *returning, sort_by_parameter_order=sort_by_parameter_order
    )
    return stmt

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-04-04 08:08:36
..	dir	-	root/root	0755	2025-04-04 08:08:36
__pycache__	dir	-	root/root	0755	2025-04-04 08:08:36
__init__.py	text/x-script.python	1.15 KB	root/root	0644	2025-04-04 08:08:36
aiosqlite.py	text/x-script.python	12.88 KB	root/root	0644	2025-04-04 08:08:36
base.py	text/x-script.python	96.08 KB	root/root	0644	2025-04-04 08:08:36
dml.py	text/x-script.python	8.92 KB	root/root	0644	2025-04-04 08:08:36
json.py	text/x-script.python	2.71 KB	root/root	0644	2025-04-04 08:08:36
provision.py	text/x-script.python	5.5 KB	root/root	0644	2025-04-04 08:08:36
pysqlcipher.py	text/x-script.python	5.25 KB	root/root	0644	2025-04-04 08:08:36
pysqlite.py	text/x-script.python	27.43 KB	root/root	0644	2025-04-04 08:08:36

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