Cilppy 'invalid metadata' errors

[szg251]

I installed clippy in my project, but I'm having an issue that I could not solve. This is how I added clippy:

      devShells."dev-${crateName}-rust" = config.nci.outputs.${crateName}.devShell.overrideAttrs (old: {
        packages = (old.packages or [ ]) ++ [ pkgs.rust-analyzer pkgs.clippy ];
      });

And this is the error I get:

error[E0786]: found invalid metadata files for crate `serde`
   --> src/json.rs:100:30
    |
100 |                     _ => Err(serde::ser::Error::custom(format!(
    |                              ^^^^^
    |
    = note: invalid metadata version found: /my/lovely/project/target/debug/deps/libserde-b13d990448a515c7.rmeta

For more information about this error, try `rustc --explain E0786`.

I'm still investigating the issue, but it seems like I'm using the wrong rustc version for clipppy. I tried the cleaning the target directory and applying rust-overlay following "nci/rust-overlay", but no success. Do you have any ideas?

Also, I think it would be a great idea, to expose some configuration to add these tools easily.

[yusdacra]

Instead of using the nixpkgs version of these tools you should use the perSystem.nci.toolchainConfig option to add these tools. Like here:

{
    nci.toolchainConfig = {
        channel = "stable";
        components = ["rust-analyzer" "rust-src" "clippy" "rustfmt"];
    };
}

(note that if you use a rust-toolchain.toml file nci will automatically use that)

[szg251]

Oh, nice that sloved my problem!

[szg251]

I have a followup question: my main environment was fixed, but I'm also using pre-commit hooks. I can supply custom tools to these, is there way to get these from nci? I was trying to get it with config.nci.toolchains.shell, but I had no luck yet..

[yusdacra]

config.nci.toolchains.shell is a derivation with all the components, so you should be able to do something like "${config.nci.toolchains.shell}/bin/cargo (or other binaries).