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# Copyright (C) 2011-2012 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""SQLite database support."""
from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'SQLiteDatabase',
'make_temporary',
]
import os
import types
import shutil
import tempfile
from functools import partial
from urlparse import urlparse
from mailman.database.base import StormBaseDatabase
from mailman.testing.helpers import configuration
class SQLiteDatabase(StormBaseDatabase):
"""Database class for SQLite."""
TAG = 'sqlite'
def _database_exists(self, store):
"""See `BaseDatabase`."""
table_query = 'select tbl_name from sqlite_master;'
table_names = set(item[0] for item in
store.execute(table_query))
return 'version' in table_names
def _prepare(self, url):
parts = urlparse(url)
assert parts.scheme == 'sqlite', (
'Database url mismatch (expected sqlite prefix): {0}'.format(url))
path = os.path.normpath(parts.path)
fd = os.open(path, os.O_WRONLY | os.O_NONBLOCK | os.O_CREAT, 0666)
# Ignore errors
if fd > 0:
os.close(fd)
# Test suite adapter for ITemporaryDatabase.
def _cleanup(self, tempdir):
shutil.rmtree(tempdir)
def make_temporary(database):
"""Adapts by monkey patching an existing SQLite IDatabase."""
tempdir = tempfile.mkdtemp()
url = 'sqlite:///' + os.path.join(tempdir, 'mailman.db')
with configuration('database', url=url):
database.initialize()
database._cleanup = types.MethodType(
partial(_cleanup, tempdir=tempdir),
database)
# bool column values in SQLite must be integers.
database.FALSE = 0
database.TRUE = 1
return database
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