rust-analyzer doesn't work fully for rust files which not in src folder

[BruceChen2017]

For example, you open git repo rustlings. Then in the rustings/src directory, rust-analyzer works well. But in rustlings/exercises/some_topic/some_rust_file, rust-analyzer does not work except that it gives syntax error message if you have. I also test official rust extension independently, rls works in rustlings/exercises/some_topic/some_rust_file.

Note: When using rust-analyzer, I have disabled official rust extension.

[flodiebold]

This is a problem with the rustlings project structure, which does some special things that don't work with IDEs. See rust-lang/rustlings#443. On RA side, this is mostly a duplicate of #6388, which would make most features work in the exercise files.

[jackos]

A fix specifically for rustlings: https://gist.github.com/jackos/7332fa8ab0b67a87f382fd566696f412

[flodiebold]

@jackos great! Maybe rustlings could generate this file automatically? 🤔

[jackos]

@flodiebold I opened a pull request to do that: rust-lang/rustlings#911

[jackos]

@flodiebold also I add this crate: https://crates.io/crates/rustlings-fix

Just go into rustlings folder and do:

cargo install rustlings-fix
rustlings-fix

And it'll generate the file