1 files changed, 72 insertions, 0 deletions

diff --git a/src/mailman/database/alembic/env.py b/src/mailman/database/alembic/env.py
new file mode 100644
index 000000000..8c5e0b342
--- /dev/null
+++ b/src/mailman/database/alembic/env.py
@@ -0,0 +1,72 @@
+from __future__ import with_statement
+from alembic import context
+from sqlalchemy import create_engine, pool
+from logging.config import fileConfig
+
+from mailman.config import config
+from mailman.utilities.string import expand
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+alembic_config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(alembic_config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = None
+
+# 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 = expand(config.database.url, config.paths)
+    context.configure(url=url, target_metadata=target_metadata)
+
+    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.
+
+    """
+    url = expand(config.database.url, config.paths)
+    engine = create_engine(url)
+    connection = engine.connect()
+    context.configure(
+        connection=connection,
+        target_metadata=target_metadata
+    )
+
+    try:
+        with context.begin_transaction():
+            context.run_migrations()
+    finally:
+        connection.close()
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()