cargo runs from the wrong directory

[dsvensson]

(cargo-process--project-root) returns the directory of Cargo.toml, but cargo is not run from that directory, which messes up cargo clippy for example:

src> cargo clippy
thread 'main' panicked at 'could not find matching package', /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/libcore/option.rs:715
note: Run with `RUST_BACKTRACE=1` for a backtrace.

[wjlroe]

Until this mode gets updated/changed in any way, you can get the bahaviour you need using the following elisp in your config:

  (defun my-set-default-dir-cargo-run (orig-fun &rest args)
    (let* ((project-root (cargo-process--project-root))
           (default-directory (if project-root
                                  project-root
                                default-directory)))
      (apply orig-fun args)))

  (advice-add 'cargo-process--start :around #'my-set-default-dir-cargo-run)

That snippet will run any cargo command in a scope that includes default-directory set to the project root (if that can be resolved).

[kwrooijen]

I've applied the change here: 1565746

I've tested it and it seems to be running the command from the root directory now. If you're having any more issues please open a new ticket.