Docs.rs builds failed

[jamwaffles]

The 0.5.1 and 0.5.2 docs builds are failing with an error about not being able to build for thumbv7m-none-eabi. Example log here. 0.5.0 is fine.

I attempted a fix locally by adding default-target to Cargo.toml:

  [package.metadata.docs.rs]
  features = ["stm32f103", "rt", "stm32-usbd"]
+ default-target = "thumbv7m-none-eabi"

then following the docs.rs instructions and running

docker-compose run -v "$(realpath ~/Repositories/stm32f1xx-hal)":/build web build crate --local /build

But I get the same error as the log on docs.rs:

2019/12/17 18:30:06 [INFO] rustwide::cmd: running `"docker" "start" "-a" "0fc8e7382b5a4976d92d59f972cd57b6c50dfdcfaacccc41044654148e92838d"`
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling typenum v1.10.0
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling semver-parser v0.7.0
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling proc-macro2 v0.4.30
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling unicode-xid v0.1.0
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]     Checking stable_deref_trait v1.1.1
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling cortex-m v0.6.1
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]     Checking vcell v0.1.2
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling syn v0.15.34
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling rand_core v0.4.0
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling cortex-m v0.5.10
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]    Compiling cortex-m-rt v0.6.11
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]     Checking r0 v0.2.2
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error[E0463]: can't find crate for `core`
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   |
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   = note: the `thumbv7m-none-eabi` target may not be installed
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error[E0463]: can't find crate for `core`
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   |
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   = note: the `thumbv7m-none-eabi` target may not be installed
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: aborting due to previous error
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: aborting due to previous error
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] For more information about this error, try `rustc --explain E0463`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] For more information about this error, try `rustc --explain E0463`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error[E0463]: can't find crate for `core`
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   |
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]   = note: the `thumbv7m-none-eabi` target may not be installed
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: aborting due to previous error
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr]
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: could not compile `vcell`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] warning: build failed, waiting for other jobs to finish...
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] For more information about this error, try `rustc --explain E0463`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: could not compile `r0`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] warning: build failed, waiting for other jobs to finish...
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] error: could not compile `stable_deref_trait`.
2019/12/17 18:30:06 [INFO] rustwide::cmd: [stderr] warning: build failed, waiting for other jobs to finish...
2019/12/17 18:30:07 [INFO] rustwide::cmd: [stderr] error: build failed

This might be more relevant to the docs.rs repo, but I thought I'd open it here in case it's a fixable problem on the stm32-rs side of things.

[TheZoq2]

I noticed that as well but forgot to deal with it. I'm not sure how to fix it outside of reporting it to docs.rs

[jamwaffles]

That's fair. I'll open an issue on the docs.rs repo when I have a minute.

[dfrankland]

We're having the same issue over on stm32f3xx-hal. Until thumbv7m-none-eabi is added to doc.rs, are there any issues with making default-target = "x86_64-unknown-linux-gnu"?

[TheZoq2]

That would be a solution, is there a way to do that for just the docs build?

[dfrankland]

That's what I am proposing to do, but I am not sure if it works yet though. I assume something like this should:

  [package.metadata.docs.rs]
  features = ["stm32f103", "rt", "stm32-usbd"]
+ default-target = "x86_64-unknown-linux-gnu"