rust-overlay: meta pkg "rust" doesn't provide a (combined) source directory about nixpkgs-mozilla

[bkchr]

Hi, here is my default.nix for rust with rust-src:

with import <nixpkgs> {}; 

let 
  myrust = (rustChannels.stable.rust.override { extensions = [ "rust-src" ]; });
in
stdenv.mkDerivation {
  name = "rust-dev";
  buildInputs = [ myrust rustracer ];
  RUST_SRC_PATH= "${myrust}/lib/rustlib/src";
}

And at least in emacs racer works with this path :)

[steveej]

@bkchr
Your expression almost works for me. I need to use RUST_SRC_PATH= "${myrust}/lib/rustlib/src/rust/src";. Otherwise racer doesn't find the sources, tested with $ racer complete "std::process". I'm wondering how it works for you, as I also can't find a recursive option or something alike on racer.

However, all there is to do is to document the extension attribute somehwere obvious 🤓

[bkchr]

Yeah you are right, the path was wrong :/
Thx for that^^

Yeah, that should be documented ^^

[steveej]

@garbas @nbp Please assign this issue to me. I'll file a documentation PR eventually.

[nbp]

@steveej Thanks for your help.

[fzakaria]

I'm still using this PR as documentation :)

[steveej]

I'm still using this PR as documentation :)

@fzakaria I never came back to issue but now that I'm reminded of it I'm happy to follow up. What's the exact information in here that's helping you?

[fzakaria]

How to add RUST_SRC_PATH since my IDE was asking for the path.

I saw another pull request that the source was also added to every channel automatically without needing to specify the extension.

The two together would be a really good documentation addition.