Custom Cargo Command to Show Only Errors (Avoid Setting RustFLAGS Every Time)

There is an unstable config for it, but it doesn't appear to have a command line parameter.

doc.rust-lang.org

warnings - Unstable Features - The Cargo Book

Experimental Cargo features are only available on the nightly channel. You are encouraged to experiment with these features to see if they meet your needs, and if there are any issues or problems. Check the linked tracking issues listed below for...