Imagine that you have something like:
[dependencies.clap] version = "2" optional = true [build-dependencies.clap] version = "2" default-features = false optional = true
Then you reference clap dependency from one of your features, which one would be referenced? Both?
clap
P.S. this is not entirely theoretical case, see https://pagure.io/fedora-rust/rust2rpm/pull-request/60#comment-67442
Features are currently conflated across dependencies / dev-dependencies / build-dependencies. There are a few issues about this in the Cargo issue tracker – see rust-lang/cargo#4361, rust-lang/cargo#4664, rust-lang/cargo#5730. So:
[features] x = ["clap/..."]
would affect both.
This may change in the future.
IIUC, that technically it is merged, Right?
So if one has default-features=false and other doesn’t, cargo will always make sure that clap always have default-features enabled. Right?
You could try it to make sure, but yes that is my understanding.
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