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def do_alembic_command(config, cmd, *args, **kwargs):
try:
getattr(alembic_command, cmd)(config, *args, **kwargs)
except alembic_util.CommandError as e:
alembic_util.err(str(e))
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def do_check_migration(config, cmd):
do_alembic_command(config, 'branches')
validate_head_file(config)
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def do_upgrade_downgrade(config, cmd):
if not CONF.command.revision and not CONF.command.delta:
raise SystemExit(_('You must provide a revision or relative delta'))
revision = CONF.command.revision
if CONF.command.delta:
sign = '+' if CONF.command.name == 'upgrade' else '-'
revision = sign + str(CONF.command.delta)
else:
revision = CONF.command.revision
do_alembic_command(config, cmd, revision, sql=CONF.command.sql)
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def do_stamp(config, cmd):
do_alembic_command(config, cmd,
CONF.command.revision,
sql=CONF.command.sql)
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def do_revision(config, cmd):
do_alembic_command(config, cmd,
message=CONF.command.message,
autogenerate=CONF.command.autogenerate,
sql=CONF.command.sql)
update_head_file(config)
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def validate_head_file(config):
script = alembic_script.ScriptDirectory.from_config(config)
if len(script.get_heads()) > 1:
alembic_util.err(_('Timeline branches unable to generate timeline'))
head_path = os.path.join(script.versions, HEAD_FILENAME)
if (os.path.isfile(head_path) and
open(head_path).read().strip() == script.get_current_head()):
return
else:
alembic_util.err(_('HEAD file does not match migration timeline head'))
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def update_head_file(config):
script = alembic_script.ScriptDirectory.from_config(config)
if len(script.get_heads()) > 1:
alembic_util.err(_('Timeline branches unable to generate timeline'))
head_path = os.path.join(script.versions, HEAD_FILENAME)
with open(head_path, 'w+') as f:
f.write(script.get_current_head())
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def add_command_parsers(subparsers):
for name in ['current', 'history', 'branches']:
parser = subparsers.add_parser(name)
parser.set_defaults(func=do_alembic_command)
parser = subparsers.add_parser('check_migration')
parser.set_defaults(func=do_check_migration)
for name in ['upgrade', 'downgrade']:
parser = subparsers.add_parser(name)
parser.add_argument('--delta', type=int)
parser.add_argument('--sql', action='store_true')
parser.add_argument('revision', nargs='?')
parser.set_defaults(func=do_upgrade_downgrade)
parser = subparsers.add_parser('stamp')
parser.add_argument('--sql', action='store_true')
parser.add_argument('revision')
parser.set_defaults(func=do_stamp)
parser = subparsers.add_parser('revision')
parser.add_argument('-m', '--message')
parser.add_argument('--autogenerate', action='store_true')
parser.add_argument('--sql', action='store_true')
parser.set_defaults(func=do_revision)
command_opt = cfg.SubCommandOpt('command',
title='Command',
help=_('Available commands'),
handler=add_command_parsers)
CONF.register_cli_opt(command_opt)
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def main():
config = alembic_config.Config(
os.path.join(os.path.dirname(__file__), 'alembic.ini')
)
config.set_main_option('script_location',
'neutron.db.migration:alembic_migrations')
# attach the Neutron conf to the Alembic conf
config.neutron_config = CONF
CONF()
#TODO(gongysh) enable logging
legacy.modernize_quantum_config(CONF)
CONF.command.func(config, CONF.command.name)