OpenStack Compute (Nova)
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#!/usr/bin/env python
import argparse
import glob
import os
import subprocess
BASE = 'nova/db/sqlalchemy/migrate_repo/versions'.split('/')
API_BASE = 'nova/db/sqlalchemy/api_migrations/migrate_repo/versions'.split('/')
STUB = \
"""# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# This is a placeholder for backports.
# Do not use this number for new work. New work starts after
# all the placeholders.
#
# See this for more information:
# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
def upgrade(migrate_engine):
pass
"""
def get_last_migration(base):
path = os.path.join(*tuple(base + ['[0-9]*.py']))
migrations = sorted([os.path.split(fn)[-1] for fn in glob.glob(path)])
return int(migrations[-1].split('_')[0])
def reserve_migrations(base, number, git_add):
last = get_last_migration(base)
for i in range(last + 1, last + number + 1):
name = '%03i_placeholder.py' % i
path = os.path.join(*tuple(base + [name]))
with open(path, 'w') as f:
f.write(STUB)
print('Created %s' % path)
if git_add:
subprocess.call('git add %s' % path, shell=True)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-n', '--number', default=10,
type=int,
help='Number of migrations to reserve')
parser.add_argument('-g', '--git-add', action='store_const',
const=True, default=False,
help='Automatically git-add new migrations')
parser.add_argument('-a', '--api', action='store_const',
const=True, default=False,
help='Reserve migrations for the API database')
args = parser.parse_args()
if args.api:
base = API_BASE
else:
base = BASE
reserve_migrations(base, args.number, args.git_add)
if __name__ == '__main__':
main()