# Alembic migration environment (configuration).

import logging

from logging.config import fileConfig

from alembic import context

from sqlalchemy import engine_from_config, pool

from kallithea.model import db

# The alembic.config.Config object, which wraps the current .ini file.

config = context.config

# Default to use the main Kallithea database string in [app:main].

# For advanced uses, this can be overridden by specifying an explicit

# [alembic] sqlalchemy.url.

database_url = (

    config.get_main_option('sqlalchemy.url') or

    config.get_section_option('app:main', 'sqlalchemy.db1.url')

)

# Configure default logging for Alembic. (This can be overriden by the

# config file, but usually isn't.)

# Setup Python loggers based on the config file provided to the alembic

# command. If we're being invoked via the Alembic API (presumably for

# stamping during "paster setup-db"), config_file_name is not available,

# and loggers are assumed to already have been configured.

if config.config_file_name:

    fileConfig(config.config_file_name, disable_existing_loggers=False)

def include_in_autogeneration(object, name, type, reflected, compare_to):

    """Filter changes subject to autogeneration of migrations. """

    # Don't include changes to sqlite_sequence.

    if type == 'table' and name == 'sqlite_sequence':

        return False

    return True

def run_migrations_offline():

    """Run migrations in 'offline' (--sql) mode.

    This produces an SQL script instead of directly applying the changes.

    Some migrations may not run in offline mode.