Does rust-analyzer support cargo check?

[hiro-o918]

I found that rust-analyzer based on Bazel does not show cargo check result on VSCode, e.g. when setting up rust analyzer for this example.

I'd like to ask whether this should be a problem because of my environment, or current rules_rust does not support cargo check.

For my understanding, rust-analyzer rules generates rust-project.json to just capture dependences of third parties or project structures.
So we should add another VSCode task to run cargo check with Bazel to show the result of cagro check.

[tkrause]

We have the same issue. rust-analyzer does not call cargo check anymore if rust-project.json is specified. Because you may not be using cargo which we aren't we're using bazel.

Instead you need to specify rust-analyzer.checkOnSave.overrideCommand as per https://rust-analyzer.github.io/manual.html#non-cargo-based-projects. However, I'm not sure what that would be in rules_rust.

Just a basic build does not work because the output has to be JSON for rust-analyzer to pick it up.

[googleson78]

See this comment on a similar issue.

[QuentinPerez]

Would be awesome, this is the main reason why I do have to maintain 2 build systems :)