Talk:Rust

How to integrate with intellij-rust?

Latest comment: 5 September 20211 comment1 person in discussion

Intellij Idea and Rust, launching from terminal.

I seem to be having success by using nix develop, flakes and launching Intellij from the terminal. Launching this way lets me capture the environment variables of my development environment. I used to get errors when doing this but I found the key is to export an XDG environment variable in the shellHook. I also use a shellAlias to launch idea with the command "@idea". This requires a .XDG folder be added to the development environment for the XDG_DATA_HOME. There are three other XDG variables that may need to be similarly exported too and folders created. But this one is the only one I have identified that is definitely problematic.

 environment.shellAliases = { 
   "@idea" = "idea-community </dev/null &>/dev/null &; echo 'Launching Intellij idea-community'"; # launch idea from the command line. This let's it access the environment variables in the 'nix develop' shell environment.
   };

I combine that with:

allows one to automatically enter nix develop shell:

 direnv = {
   enable = true;
   nix-direnv.enable = true;
 };

a .envrc file with the following two lines:

 strict_env
 use flake

I then modify the basic rust-overlay flake found here: https://github.com/oxalica/rust-overlay#use-in-devshell-for-nix-develop

The key is to add:

 shellHook = ''
   export XDG_DATA_HOME="$PWD/.XDG/share"
 '';

The XDG_DATA_HOME variable export avoids the following error message from Intellij Idea:

 /nix/store/hl5v6vjsf3yhi9a2fyf5vnq06w6c257r-rust-default-1.64.0/bin/cargo check --message-format json --workspace --all-targets -Z unstable-options --keep-going
 error: failed to run `rustc` to learn about target-specific information
 error: failed to run `rustc` to learn about target-specific information
 Caused by:
 could not execute process `/home/username/.local/share/JetBrains/IdeaIC2023.1/intellij-rust/bin/linux/x86-64/intellij-rust-native-helper /nix/store/hl5v6vjsf3yhi9a2fyf5vnq06w6c257r-rust-default-1.64.0/bin/rustc - --crate-name ___ --print=file-names --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (never executed)
 Caused by:
  No such file or directory (os error 2)

My unredacted flake.nix that seems to be working with Intellij is here: https://gist.github.com/cessationoftime/e4e988059727ba664f8f105bd5526c0c

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