Cargo Features

[dependencies]
data-source = { version = "0.1.0", default-features = false, features = ["reqwest", "tar"] }
default = reqwest, tar

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

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.

reqwest default

Affects data-source::HttpSource

tar default

Affects data-source::get_file_from_tar