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# Copyright (C) 2006-2007 Jelmer Vernooij <jelmer@samba.org>
# This program 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.
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Subversion cache directory access."""
import bzrlib
from bzrlib import debug
from bzrlib.config import config_dir, ensure_config_dir_exists
from bzrlib.trace import mutter, warning
from bzrlib.plugins.svn import version_info
import os
def create_cache_dir():
"""Create the top-level bzr-svn cache directory.
:return: Path to cache directory.
"""
ensure_config_dir_exists()
if version_info[3] == 'exp':
name = 'svn-cache-exp'
extra = "This is the directory used by the experimental version of bzr-svn.\n"
else:
name = 'svn-cache'
extra = ""
cache_dir = os.path.join(config_dir(), name)
if not os.path.exists(cache_dir):
os.mkdir(cache_dir)
open(os.path.join(cache_dir, "README"), 'w').write(
"""This directory contains information cached by the bzr-svn plugin.
It is used for performance reasons only and can be removed
without losing data.
See http://bazaar-vcs.org/BzrForeignBranches/Subversion for details.
""" + extra)
return cache_dir
def check_pysqlite_version(sqlite3):
"""Check that sqlite library is compatible.
"""
if (sqlite3.sqlite_version_info[0] < 3 or
(sqlite3.sqlite_version_info[0] == 3 and
sqlite3.sqlite_version_info[1] < 3)):
warning('Needs at least sqlite 3.3.x')
raise bzrlib.errors.BzrError("incompatible sqlite library")
try:
try:
import sqlite3
check_pysqlite_version(sqlite3)
except (ImportError, bzrlib.errors.BzrError), e:
from pysqlite2 import dbapi2 as sqlite3
check_pysqlite_version(sqlite3)
except:
warning('Needs at least Python2.5 or Python2.4 with the pysqlite2 '
'module')
raise bzrlib.errors.BzrError("missing sqlite library")
class CacheTable(object):
"""Simple base class for SQLite-based caches."""
def __init__(self, cache_db=None):
if cache_db is None:
self.cachedb = sqlite3.connect(":memory:")
else:
self.cachedb = cache_db
self._create_table()
self.cachedb.commit()
def _create_table(self):
pass
def mutter(self, text, *args):
if "cache" in debug.debug_flags:
mutter(text, *args)
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