Licenses: "Apache 2.0 and MIT", or "Apache 2.0 or MIT"

[mgeisler]

Hi @asomers,

I'm working on importing mockall and mockall_derive to AOSP. Our tooling flagged the license file: is the crate licensed under "Apache 2.0 or MIT" (as is usual in Rust), or is it licensed with both licenses applying at the same time?

The license field in Cargo.toml currently says

[package]
license = "MIT/Apache-2.0"

and I believe it might have been intended to let it say

[package]
license = "MIT OR Apache-2.0"

as per the Cargo reference.

We pick the Apache 2.0 license when given the choice (random example), but here our tooling got confused.

[asomers]

Good question. I'm sure I just copied it from some place. A quick grep of my checked out Rust projects shows 60 that use "MIT/Apache-2.0", including one that's within rust-lang/rust itself. Is there any official guidance on this issue?

[mgeisler]

Is there any official guidance on this issue?

Not sure, I don't know more than what the Cargo book says.

Looking around the SPDX site, I found this page which shows the OR syntax also shown in the Cargo reference.

It turns out that this is not blocking the import so it's probably not a big deal.

[asomers]

Thanks for that reference, @mgeisler. Would you please review the linked PR?

[mgeisler]

Thanks for that reference, @mgeisler. Would you please review the linked PR?

Certainly, it looks good from what I can tell!