113 lines
3.8 KiB
Python
113 lines
3.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import distutils.version as dist_version
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import os
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import sys
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from heat.db.sqlalchemy.session import get_engine
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import sqlalchemy
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import migrate
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from migrate.versioning import util as migrate_util
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_REPOSITORY = None
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@migrate_util.decorator
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def patched_with_engine(f, *a, **kw):
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url = a[0]
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engine = migrate_util.construct_engine(url, **kw)
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try:
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kw['engine'] = engine
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return f(*a, **kw)
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finally:
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if isinstance(engine, migrate_util.Engine) and engine is not url:
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migrate_util.log.debug('Disposing SQLAlchemy engine %s', engine)
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engine.dispose()
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# TODO(jkoelker) When migrate 0.7.3 is released and nova depends
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# on that version or higher, this can be removed
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MIN_PKG_VERSION = dist_version.StrictVersion('0.7.3')
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if (not hasattr(migrate, '__version__') or
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dist_version.StrictVersion(migrate.__version__) < MIN_PKG_VERSION):
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migrate_util.with_engine = patched_with_engine
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# NOTE(jkoelker) Delay importing migrate until we are patched
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from migrate.versioning import api as versioning_api
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from migrate.versioning.repository import Repository
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try:
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from migrate.versioning import exceptions as versioning_exceptions
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except ImportError:
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try:
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from migrate import exceptions as versioning_exceptions
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except ImportError:
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sys.exit(_("python-migrate is not installed. Exiting."))
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#_REPOSITORY = None
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def db_sync(version=None):
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if version is not None:
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try:
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version = int(version)
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except ValueError:
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raise exception.Error(_("version should be an integer"))
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current_version = db_version()
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repository = _find_migrate_repo()
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if version is None or version > current_version:
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return versioning_api.upgrade(get_engine(), repository, version)
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else:
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return versioning_api.downgrade(get_engine(), repository,
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version)
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def db_version():
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repository = _find_migrate_repo()
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try:
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return versioning_api.db_version(get_engine(), repository)
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except versioning_exceptions.DatabaseNotControlledError:
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# If we aren't version controlled we may already have the database
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# in the state from before we started version control, check for that
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# and set up version_control appropriately
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meta = sqlalchemy.MetaData()
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engine = get_engine()
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meta.reflect(bind=engine)
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try:
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for table in ('stack', 'resource', 'event',
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'parsed_template', 'raw_template'):
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assert table in meta.tables
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return db_version_control(1)
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except AssertionError:
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return db_version_control(0)
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def db_version_control(version=None):
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repository = _find_migrate_repo()
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versioning_api.version_control(get_engine(), repository, version)
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return version
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def _find_migrate_repo():
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"""Get the path for the migrate repository."""
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path = os.path.join(os.path.abspath(os.path.dirname(__file__)),
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'migrate_repo')
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assert os.path.exists(path)
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global _REPOSITORY
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if _REPOSITORY is None:
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_REPOSITORY = Repository(path)
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return _REPOSITORY
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