Cargo Features

[dependencies]
cmdtree = { version = "0.10.1", default-features = false, features = ["runnable"] }
default = runnable

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

runnable default = linefeed

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.

linefeed runnable