Cargo Features

urlshortener-cli = { version = "1.2.0", default-features = false, features = ["notifications"] }
default = notifications

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

notifications default = notify-rust

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.

notify-rust notifications