See rust-lang/cargo#6664 (comment) for some context.

Currently cargo clippy is a thin wrapper script around Cargo that invokes cargo check with a RUSTC_WRAPPER: https://github.com/rust-lang/rust-clippy/blob/8dfabdf11c6cdaffd7c6e6552a6ead8d52c49b10/src/main.rs

It does some additional hacks to support the clippy dogfood test and passing down arguments.

We should move this into cargo proper, like rustc: Ideally it's just a copy of cargo check that sets a different rustc executable (temporarily can be done by overriding RUSTC_WRAPPER, but the better solution probably involves modifying config.rustc() https://github.com/rust-lang/cargo/blob/716b02cb4c7b75ce435eb06defa25bc2d725909c/src/cargo/util/config.rs#L194-L215

Steps:

• Add cargo clippy-preview to cargo Cargo clippy cargo#6759
• Make it work with dogfood tests Update dogfood tests to use cargo clippy-preview #4050
• Improve cargo integration, especially with cargo fix call clippy-driver directly rather than as a rustc_wrapper cargo#7006
• add better help Better help support in clippy-driver #4173
• Make cargo-clippy shell out to clippy-preview?
• Perhaps make -Wlintname work as a shortcut for -Wclippy::lintname
• rename and stabilize cargo clippy-preview