Thoughts on a cargo-owned build script API

[epage]

The cargo team is considering an official build script API (rust-lang/cargo#12432). We are looking at adopting build-rs package, mostly because the author reached out to us.

I understand build-env isn't a full build-script API but seems to handle

• env variable tracking (seems really useful for a build script API)
• fallback handling for target-specific env variables (seems too specialized of policy for a general API owned by cargo)

We'd be interested in input on this

• Any concern over an official API and any particular package / package name being adopted
• Feedback on API design choices made?
• Thoughts on the role of cargo's crate and this crate moving forward (e.g. would you be interested in joining efforts and helping out with cargos?)

[codyps]

Thanks for pinging me, I've commented in linked issue: rust-lang/cargo#12432 (comment) . Getting what this crate does into something with better support is certainly something I'm interested in helping with