Update to 1.26.1 fails on ARM due to missing docs artifact

[blackus2]

I cannot update to rust version 1.26.1 (nor 1.26.0) on arm-unknown-linux-gnuabihf. Rustup fails with:

RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable
info: syncing channel updates for 'stable-arm-unknown-linux-gnueabihf'
info: latest update on 2018-05-25, rust version 1.26.1 (827013a31 2018-05-25)
error: component 'rust-docs' for 'arm-unknown-linux-gnueabihf' is unavailable for download

My rustup is on the newest version:

$ rustup self update
info: checking for self-updates
$ rustup --version
rustup 1.11.0 (e751ff9f8 2018-02-13)

According to a post on reddit it seems to be working on armv7-unknown-linux-gnueabihf.

edit: CC @pietroalbini

[Mark-Simulacrum]

Cc @alexcrichton

[Mark-Simulacrum]

RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup install stable-arm-unknown-linux-gnueabihf works for me and makes no attempt to install rust-docs component. I'm not sure what the cause of the error you see could be, since I can't reproduce... is there a chance you could also paste output for RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup -v install stable-arm-unknown-linux-gnueabihf? It might be that you need to run rustup install stable instead of rustup update stable...

[pietroalbini]

Tested this locally, the bug only appears when running update instead of install on an existing toolchain. Steps to reproduce:

rustup toolchain install 1.24.0-arm-unknown-linux-gnueabihf
mv ~/.rustup/toolchains/{1.24.0,stable}-arm-unknown-linux-gnueabihf
mv ~/.rustup/update-hashes/{1.24.0,stable}-arm-unknown-linux-gnueabihf
RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable-arm-unknown-linux-gnueabihf

[Mark-Simulacrum]

I've added a note about using install instead of update to the blog post, hopefully that should be sufficient.

[pietroalbini]

Can we get a rustup release that ignores a component if it's missing from the new manifest before releasing 1.26.1 though? I can try working on a PR tomorrow.

[blackus2]

@Mark-Simulacrum: Sure thing. Even though it may no longer be interesting (due to the whole install vs update thing) here's the output you requested:

$ RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup -v install stable-arm-unknown-linux-gnueabihf
verbose: read metadata version: '12'
verbose: updating existing install for 'stable-arm-unknown-linux-gnueabihf'
verbose: toolchain directory: '/home/pi/.rustup/toolchains/stable-arm-unknown-linux-gnueabihf'
info: syncing channel updates for 'stable-arm-unknown-linux-gnueabihf'
verbose: creating temp file: /home/pi/.rustup/tmp/q2dx0efbqg186xqa_file
verbose: downloading file from: 'https://dev-static.rust-lang.org/dist/channel-rust-stable.toml.sha256'
verbose: downloading with curl
verbose: deleted temp file: /home/pi/.rustup/tmp/q2dx0efbqg186xqa_file
verbose: creating temp file: /home/pi/.rustup/tmp/13n69k_jkpqpbzvj_file.toml
verbose: downloading file from: 'https://dev-static.rust-lang.org/dist/channel-rust-stable.toml'
verbose: downloading with curl
verbose: checksum passed
verbose: deleted temp file: /home/pi/.rustup/tmp/13n69k_jkpqpbzvj_file.toml
info: latest update on 2018-05-25, rust version 1.26.1 (827013a31 2018-05-25)
error: component 'rust-docs' for 'arm-unknown-linux-gnueabihf' is unavailable for download

Ignoring certain components if they are missing seems like a valid option. As long as it is not strictly necessary (in this case docs) I think a warning instead of an error should be enough.

[pietroalbini]

OK, the PR fixing rustup is merged, it would be nice to have a new rustup release out before 1.26.1.

[pietroalbini]

This can be considered as fixed now.