Cargo check

I am looking for an alternative to `cargo check --message-format=json` but cannot find it anywhere.

I have tried `bazel run @rules_rust//tools/upstream_wrapper:cargo check` but this expects a Cargo.toml file which I don't have.

How can I feed the right data to Rust Analyzer to check on save?

Minimal breaking example:
https://github.com/otiv-willem-vanhulle/bazel-rust-check