How can I always generate a single migration file, with `drizzle-kit`?

I've got a use case where, instead of using `drizzle-kit push` to directly update the database,. I instead want to generate a sql file from the schema and store that in the migrations folder.

So in my case, I always want to have a single source of truth for the schema in a SQL file.

I want to do it like this way, because I will then create more migration files on my own for other SQL statements that drizzle doesn't support yet. i.e. postgres policies, postgres functions, etc.