imageproc docs fail to build

[theotherphil]

https://docs.rs/crate/imageproc/0.19.1/builds/185422

The docs build fails while attempting to document the sdl2-sys dependency https://github.com/Rust-SDL2/rust-sdl2/blob/master/sdl2-sys/build.rs#L50

This isn't an issue with docs.rs per se, but I was hoping there would be a known workaround for dependencies that docs.rs cannot build. This dependency is only required if a feature is enabled, so I'll disable that feature in package.metadata.docs.rs for now to get some documentation.

[pietroalbini]

I'll take a look on Monday if nobody else from the team beats me to it.

[pietroalbini]

I'm sorry but you'll have to disable that feature. One of your dependencies is trying to download with curl something from the internet in its build script.

While it's technically possible for me to fix that build failure (looks like the curl CLI is missing?) an upcoming docs.rs change is going to remove all network access from builds. That's going to break your crate anyway, so there is no point in hacking a fix right now.

[theotherphil]

Ok, thanks for looking. Disabling network access sounds pretty sensible!