Cargo Features

[dependencies]
tav = { version = "1.1.0", default-features = false, features = ["cli", "required-features"] }
default = cli

The cli feature is set by default whenever tav is added without default-features = false somewhere in the dependency tree.

cli default required-features? = clap

list optionals here:

required-features = cli

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.

clap cli