Cargo Features

[dependencies]
launchd = { version = "0.3.0", default-features = false, features = ["io", "cron"] }
default = io

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

io default = plist, serde

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.

serde io
plist io
cron implicit feature

Enables cron ^0.12

cron:

A cron expression parser and schedule explorer