Feature Request: Add interface to roll up all changes into a single change

[kylebamos]

Given a project that grows and evolves forever, migrations files become prolific in project repos and new/test setups take longer and longer to migrate/fixturize.

Is there a way to roll up all migrations to a certain point and execute them as a minimal number of steps with sqitch? Similar to "flattening" in django or "truncating history" in alembic/sqlalchemy?

Since migrations are just raw SQL here, I'm somewhat anticipating that there's not a great solution to this other than migrating to a specific point, dumping the schema and making that the new initial state and what not all manually, but I figured I'd ask here anyway.

[theory]

There is not a feature to automatically flatten things in Sqitch, but you can more or less do the equivalent by following the instructions to start with an existing database.

Will make this a feature request.