try:

    from tgext.debugbar import enable_debugbar

    import kajiki # only to check its existence

    assert kajiki

except ImportError:

    pass

else:

    base_config['renderers'].append('kajiki')

    enable_debugbar(base_config)

def setup_configuration(app):

    config = app.config

    if not kallithea.lib.locale.current_locale_is_valid():

        log.error("Terminating ...")

        sys.exit(1)

    # Mercurial sets encoding at module import time, so we have to monkey patch it

    hgencoding = config.get('hgencoding')

    if hgencoding:

        mercurial.encoding.encoding = hgencoding

    if config.get('ignore_alembic_revision', False):

    else:

        dbconf = config['sqlalchemy.url']

        alembic_cfg = alembic.config.Config()

        alembic_cfg.set_main_option('script_location', 'kallithea:alembic')

        alembic_cfg.set_main_option('sqlalchemy.url', dbconf)

        script_dir = ScriptDirectory.from_config(alembic_cfg)

        available_heads = sorted(script_dir.get_heads())

        engine = create_engine(dbconf)

        with engine.connect() as conn:

            context = MigrationContext.configure(conn)

            current_heads = sorted(str(s) for s in context.get_current_heads())

        if current_heads != available_heads:

            log.error('Failed to run Kallithea:\n\n'

                      'The database version does not match the Kallithea version.\n'

                      'Please read the documentation on how to upgrade or downgrade the database.\n'

                      'Current database version id(s): %s\n'

                      'Expected database version id(s): %s\n'

                      'If you are a developer and you know what you are doing, you can add `ignore_alembic_revision = True` '

                      'to your .ini file to skip the check.\n' % (' '.join(current_heads), ' '.join(available_heads)))

            sys.exit(1)

    # store some globals into kallithea

    kallithea.DEFAULT_USER_ID = db.User.get_default_user().user_id