`nannou` crate build failed

[mitchmindtree]

Crate name: nannou
Build failure link: https://docs.rs/crate/nannou/0.12.0/builds/196525

Additional details:
The build seems to fail on the xcb dependency version 0.8.2, however this build has succeeded in the past and is currently available on docs.rs. This leads me to wonder if the cause is a bug in the latest rustdoc nightly. Is it possible to get the documentation re-built with stable?

[jyn514]

Related: #229, #228

[jyn514]

Your build error doesn't seem to be related to the version of rust, though. cc @pietroalbini, do you intentionally make /opt/rustwide/cargo-home read-only?

[jyn514]

It looks like xcb is a new dependency in nannou 0.12, I wonder if it's trying to write to part of the filesystem it's not supposed to. I know we changed the sandboxing pretty significantly about a month ago in the switch to rustwide: #407, xcb hasn't been rebuilt since 2018: https://docs.rs/crate/xcb/0.8.2/builds/87332

[pietroalbini]

Your build error doesn't seem to be related to the version of rust, though. cc @pietroalbini, do you intentionally make /opt/rustwide/cargo-home read-only?

Yeah, otherwise a malicious crate could've messed up the state for other crates.

[alberdingk-thijm]

It looks like xcb is a new dependency in nannou 0.12, I wonder if it's trying to write to part of the filesystem it's not supposed to. I know we changed the sandboxing pretty significantly about a month ago in the switch to rustwide: #407, xcb hasn't been rebuilt since 2018: https://docs.rs/crate/xcb/0.8.2/builds/87332

I just tried building xcb 0.8.2 myself using docker-compose run web build crate xcb 0.8.2, and this appears to be what caused the problem.
The crate has a python script rs_client.py which it uses to create some FFI files. The exact line it fails at is rs_client.py:114.

The good news is, xcb 0.9.0 works fine, so I think if x11-clipboard (the dependency of copypasta, the dependency of conrod_core, the dependency of nannou) upgrades to 0.9.0, this should be fixed.

[jyn514]

Looks like this isn't a bug in docs.rs, going to close this.

[mitchmindtree]

Thanks for digging into this @alberdingk-thijm!

[alberdingk-thijm]

Looks like this isn't a bug in docs.rs, going to close this.

@jyn514, do you happen to know when docs.rs will try to build nannou (and the other crates related to this error in xcb) again?

[jyn514]

Rebuilding automagically is #464 . Currently someone has to schedule a manual build.

[jyn514]

This particular crate won't be helped by rebuilding however because it tries to write to a read only filesystem.