Cargo Features

[dependencies]
filesystem = { version = "0.4.4", default-features = false, features = ["fake", "temp", "testing", "mock"] }
default = fake, temp

These default features are set whenever filesystem is added without default-features = false somewhere in the dependency tree.

fake default testing?
temp default = rand, tempdir

Affects filesystem::TempDir, filesystem::TempFileSystem, os::OsTempDir

testing = fake, mock
mock testing? = pseudo

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.

pseudo mock?

Enables pseudo ^0.1.0

rand temp

Enables rand ^0.4

tempdir temp