Cargo Features

[dependencies]
humblegen = { version = "0.4.0", default-features = false, features = ["which-rustfmt"] }
default = which-rustfmt

The which-rustfmt feature is set by default whenever humblegen is added without default-features = false somewhere in the dependency tree.

which-rustfmt default = which

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

which which-rustfmt

Enables which ^3