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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import six
from alembic import command
from sqlalchemy.orm import sessionmaker
from mediagoblin.db.open import setup_connection_and_db_from_config
from mediagoblin.db.migration_tools import (
MigrationManager, build_alembic_config)
from mediagoblin.init import setup_global_and_app_config
from mediagoblin.tools.common import import_component
_log = logging.getLogger(__name__)
logging.basicConfig()
## Let's not set the level as debug by default to avoid confusing users :)
# _log.setLevel(logging.DEBUG)
def dbupdate_parse_setup(subparser):
pass
class DatabaseData(object):
def __init__(self, name, models, foundations, migrations):
self.name = name
self.models = models
self.foundations = foundations
self.migrations = migrations
def make_migration_manager(self, session):
return MigrationManager(
self.name, self.models, self.foundations, self.migrations, session)
def gather_database_data(plugins):
"""
Gather all database data relevant to the extensions installed.
Gather all database data relevant to the extensions we have
installed so we can do migrations and table initialization.
Returns a list of DatabaseData objects.
"""
managed_dbdata = []
# Add main first
from mediagoblin.db.models import MODELS as MAIN_MODELS
from mediagoblin.db.migrations import MIGRATIONS as MAIN_MIGRATIONS
from mediagoblin.db.models import FOUNDATIONS as MAIN_FOUNDATIONS
managed_dbdata.append(
DatabaseData(
u'__main__', MAIN_MODELS, MAIN_FOUNDATIONS, MAIN_MIGRATIONS))
for plugin in plugins:
try:
models = import_component('{0}.models:MODELS'.format(plugin))
except ImportError as exc:
_log.debug('No models found for {0}: {1}'.format(
plugin,
exc))
models = []
except AttributeError as exc:
_log.warning('Could not find MODELS in {0}.models, have you '
'forgotten to add it? ({1})'.format(plugin, exc))
models = []
try:
migrations = import_component('{0}.migrations:MIGRATIONS'.format(
plugin))
except ImportError as exc:
_log.debug('No migrations found for {0}: {1}'.format(
plugin,
exc))
migrations = {}
except AttributeError as exc:
_log.debug('Could not find MIGRATIONS in {0}.migrations, have you'
'forgotten to add it? ({1})'.format(plugin, exc))
migrations = {}
try:
foundations = import_component(
'{0}.models:FOUNDATIONS'.format(plugin))
except ImportError as exc:
foundations = {}
except AttributeError as exc:
foundations = {}
if models:
managed_dbdata.append(
DatabaseData(plugin, models, foundations, migrations))
return managed_dbdata
def run_alembic_migrations(db, app_config, global_config):
"""Initialize a database and runs all Alembic migrations."""
Session = sessionmaker(bind=db.engine)
session = Session()
cfg = build_alembic_config(global_config, None, session)
# XXX: we need to call this method when we ditch
# sqlalchemy-migrate entirely
# if self.get_current_revision() is None:
# self.init_tables()
return command.upgrade(cfg, 'heads')
def run_dbupdate(app_config, global_config):
"""
Initialize or migrate the database as specified by the config file.
Will also initialize or migrate all extensions (media types, and
in the future, plugins)
"""
# Set up the database
db = setup_connection_and_db_from_config(app_config, migrations=True)
# Run the migrations
# TODO: rename to run_legacy_migrations
run_all_migrations(db, app_config, global_config)
# TODO: Make this happen regardless of python 2 or 3 once ensured
# to be "safe"!
run_alembic_migrations(db, app_config, global_config)
def run_all_migrations(db, app_config, global_config):
"""Initialize or migrates a database.
Initializes or migrates a database that already has a
connection setup and also initializes or migrates all
extensions based on the config files.
It can be used to initialize an in-memory database for
testing.
"""
# Gather information from all media managers / projects
dbdatas = gather_database_data(
list(global_config.get('plugins', {}).keys()))
Session = sessionmaker(bind=db.engine)
# Setup media managers for all dbdata, run init/migrate and print info
# For each component, create/migrate tables
for dbdata in dbdatas:
migration_manager = dbdata.make_migration_manager(Session())
migration_manager.init_or_migrate()
def dbupdate(args):
global_config, app_config = setup_global_and_app_config(args.conf_file)
run_dbupdate(app_config, global_config)
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