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"""Provide Router for db migrations."""
import os
from contextlib import suppress
from peewee_migrate import Router as PeeweeRouter
from peewee_migrate.router import void
__all__ = ["Router"]
class Router(PeeweeRouter):
"""Like peewee_migrate.Router but supports multiple migrations dirs."""
# this is a slightly edited version from peewee_migrate.router.Router
def __init__(self, database, migrations_dirs, **kwargs):
super().__init__(database, migrate_dir=migrations_dirs[0], **kwargs)
self.migrations_dirs = migrations_dirs
@property
def todo(self):
"""Scan migrations in file system."""
for migrate_dir in self.migrations_dirs:
if not os.path.exists(migrate_dir):
self.logger.warn(
"Migration directory: %s does not exist.", migrate_dir
)
os.makedirs(migrate_dir)
migration_names = []
for migrate_dir in self.migrations_dirs:
migration_names += sorted(
f[: -len(".py")]
for f in os.listdir(migrate_dir)
if self.filemask.match(f)
)
return migration_names
def read(self, name):
"""Read migration from file."""
scope = {}
for migrate_dir in self.migrations_dirs:
with suppress(FileNotFoundError):
with open(os.path.join(migrate_dir, name + ".py")) as f:
code = compile(
f.read(), "<string>", "exec", dont_inherit=True
)
exec(code, scope)
return scope.get("migrate", void), scope.get("rollback", void)
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