Cargo Features

[dependencies]
grex = { version = "1.4.5", default-features = false, features = ["cli", "python"] }
default = cli

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

cli default = clap
python = pyo3

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 not wasm cli
pyo3 not wasm python?

Enables pyo3 ^0.20.3