Recommended LSP independent API?

Hello folks, I'm looking for a way to access Rust Analyzer without LSP.

AFAIK, RA is designed to be independent from LSP. IMO, the intended "native" API is ra_ide::AnalysisHost. And it seems I have to perform all file I/O and dependency discovery myself. GlobalState in rust_analyzer crate seems doing the jobs, but it is coupled with LSP.

This makes me somewhat confused. Is that AnalysisHost a correct place to start? Or is there something else?

Yes, AnalysisHost is the right place. The fact that it doesn’t do IO is a feature :-). You can use project_model crate to do dependency discovery (see how stuff in cli module works).

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Thanks. I think separated I/O is a very good design. I'll take a look of project_model.

Got to the bigger screen :slight_smile:

So this is an example code which creates AnalysisHost directly, without going via GlobalState:

https://github.com/rust-analyzer/rust-analyzer/blob/5a8124273dd663f7f1ed43b53defc4a2c52dbc12/crates/rust-analyzer/src/cli/analysis_bench.rs

The bulk of work happens here:

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