text: # Copyright 2016, 2017 IBM Corp.
  #
  # 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 file is generated by alembic init automatically, therefore we keep it
  as-is without modifying it for coding guidelines.
  """
  
  # pylint: disable=all
  from __future__ import with_statement
  from alembic import context
  from sqlalchemy import engine_from_config, pool
  from logging.config import fileConfig
  
  # this is the Alembic Config object, which provides
  # access to the values within the .ini file in use.
  config = context.config
  
  # Interpret the config file for Python logging.
  # This line sets up loggers basically.
  fileConfig(config.config_file_name)
  
  # add your model's MetaData object here
  # for 'autogenerate' support
  # from myapp import mymodel
  # target_metadata = mymodel.Base.metadata
  from tessia.server.db.models import BASE
  target_metadata = BASE.metadata
  
  # other values from the config, defined by the needs of env.py,
  # can be acquired:
  # my_important_option = config.get_main_option("my_important_option")
  # ... etc.
  
  
  def run_migrations_offline():
      """Run migrations in 'offline' mode.
  
      This configures the context with just a URL
      and not an Engine, though an Engine is acceptable
      here as well.  By skipping the Engine creation
      we don't even need a DBAPI to be available.
  
      Calls to context.execute() here emit the given string to the
      script output.
  
      """
      url = config.get_main_option("sqlalchemy.url")
      context.configure(
          url=url, target_metadata=target_metadata, literal_binds=True)
  
      with context.begin_transaction():
          context.run_migrations()
  
  
  def run_migrations_online():
      """Run migrations in 'online' mode.
  
      In this scenario we need to create an Engine
      and associate a connection with the context.
  
      """
      connectable = engine_from_config(
          config.get_section(config.config_ini_section),
          prefix='sqlalchemy.',
          poolclass=pool.NullPool)
  
      with connectable.connect() as connection:
          context.configure(
              connection=connection,
              target_metadata=target_metadata
          )
  
          with context.begin_transaction():
              context.run_migrations()
  
  if context.is_offline_mode():
      run_migrations_offline()
  else:
      run_migrations_online()
  