Support `rustdoc::` lints

[emilk]

Currently if I put "rustdoc::missing_crate_level_docs" in warn in Cranky.toml it does nothing.

…though honestly I don't understand the rustdoc lints. cargo clippy -- -D rustdoc::missing_crate_level_docs runs without warnings when there are missing crate level docs.

[Nemo157]

Tool lints are checked by their respective tools. You need to use cargo rustdoc -- -D rustdoc::missing_crate_level_docs.

That shows a reason why cargo-lints took a tool as the first argument, it would have been possible to expand it to cargo lints rustdoc to support multiple tools (and maybe some cargo lints --all option to rebuild with all the different tools).

Maybe cargo-cranky should run both clippy and rustdoc by default? (EDIT: or based on detecting lint names from the config?) Unfortunately running rustdoc right now will generate docs if it is successful. There is an unstable --check option that allows only running the lints.

[emilk]

There is also the problem that cargo rustdoc cannot be run in a workspace:

cargo rustdoc -- -D rustdoc::missing_crate_level_docs

❯ cargo rustdoc -- -D rustdoc::missing_crate_level_docs
error: manifest path egui/Cargo.toml` is a virtual manifest, but this command requires running against an actual package in this workspace

cargo doc is supposed to be used for workspaces, but then you cannot supply any lints:

❯ cargo doc -- -D rustdoc::missing_crate_level_docs -D rustdoc::unsafe_op_in_unsafe_fn
error: Found argument '-D' which wasn't expected, or isn't valid in this context

[Nemo157]

You can do something like RUSTDOCFLAGS=-Drustdoc::... cargo doc --workspace --no-deps

Another reason it'd be great to have all the intricacies handled by a tool like this 😁

[emilk]

Thanks @Nemo157, that works!