Blame alembic/env.py

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from __future__ import with_statement
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import os
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from alembic import context
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from sqlalchemy import create_engine, pool
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from logging.config import fileConfig
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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fileConfig(config.config_file_name)
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if 'PAGURE_CONFIG' not in os.environ \
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        and os.path.exists('/etc/pagure/pagure.cfg'):
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    print 'Using configuration file `/etc/pagure/pagure.cfg`'
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    os.environ['PAGURE_CONFIG'] = '/etc/pagure/pagure.cfg'
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try:
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    import pagure
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    import pagure.lib.model
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except ImportError:
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    import sys
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    sys.path.insert(0, '.')
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    import pagure
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    import pagure.lib.model
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# add your model's MetaData object here
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# for 'autogenerate' support
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target_metadata = pagure.lib.model.BASE.metadata
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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DBURL = config.get_main_option("sqlalchemy.url")
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if not DBURL:
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    DBURL = pagure.APP.config['DB_URL']
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def run_migrations_offline():
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    """Run migrations in 'offline' mode.
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    This configures the context with just a URL
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    and not an Engine, though an Engine is acceptable
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    here as well.  By skipping the Engine creation
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    we don't even need a DBAPI to be available.
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    Calls to context.execute() here emit the given string to the
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    script output.
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    """
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    context.configure(url=DBURL, target_metadata=target_metadata)
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    with context.begin_transaction():
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        context.run_migrations()
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def run_migrations_online():
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    """Run migrations in 'online' mode.
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    In this scenario we need to create an Engine
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    and associate a connection with the context.
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    """
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    connectable = create_engine(DBURL, poolclass=pool.NullPool)
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    with connectable.connect() as connection:
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        context.configure(
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            connection=connection,
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            target_metadata=target_metadata
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        )
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        with context.begin_transaction():
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            context.run_migrations()
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if context.is_offline_mode():
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    run_migrations_offline()
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else:
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    run_migrations_online()
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