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I started working on this project in order to address a common issue that people had when they were using another one of my Python projects, dbt-duckdb: when a long-running Python process is operating on a DuckDB database, you cannot connect to the DuckDB file using the CLI or with a database query tool like DBeaver to examine the state of the database, because each DuckDB file may only be open by a single process at a time. The Buena Vista library makes it possible to work with a DuckDB database from multiple different processes over the Postgres wire protocol, and the library makes it simple enough to run an example that illustrates the idea locally:
in order to start a Postgres server on localhost:5433 backed by the DuckDB database file that you passed in at the command line (or by an in-memory DuckDB database if you do not specify an argument.) You should be able to query the database via psql in another window by running psql -h localhost -p 5433 (no database/username/password arguments required) or by using the DBeaver Postgres client connection.
By default, SQLMesh config will be pulled from ./sqlmesh, a sample SQLMesh project with some basic (contrived) metric definitions.
