Cargo Features

[dependencies]
ratpack = { version = "0.1.4", default-features = false, features = ["logging", "tls", "trace", "unix"] }
default = logging

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

logging default = log
tls = tokio-rustls, webpki
trace = tracing
unix

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.

tokio-rustls tls?

Enables tokio-rustls ^0.23

webpki tls?
log logging
tracing trace?