Module persistence 

Safely create, reopen, and reuse a database.

Persistence and reopening

Store::open accepts bare and ordinary Git repositories. It creates a bare repository only when the path is missing or an existing directory is empty. A nonempty directory that is not a repository is rejected without changing it.

use git_vdb::{open, Point};

fn main() -> git_vdb::Result<()> {
    let path = "./vectors.git";
    open(path)?.collection("docs").upsert([
        Point::new("stable-id", [1.0, 0.0]),
    ])?;

    let reopened = open(path)?.collection("docs");
    assert_eq!(reopened.count()?, 1);
    Ok(())
}

Collection handles are inexpensive and can be cloned. Reads never create a missing collection. The first nonempty upsert creates it and infers its dimension; explicitly configured empty collections remain available through Database::create_collection.