When are new Rust releases published to Github?

random_user · November 13, 2024, 4:13am

I see that Github releases on GitHub - rust-lang/rust: Empowering everyone to build reliable and efficient software. follow exactly the releases on https://releases.rs/. I'd like to use them for automating toolchain upgrades as Github releases are a very convenient datasource. But I have a question.

Is it guaranteed that the rust release associated with a given Github release is available immediately when the github release is published? That is, is the Github release published after or simultaneously with the release being made available on releases.rs and rustup?

kpreid · November 13, 2024, 5:29am

I don't know the answer to your question, but the release process documentation might be a good place to start figuring it out.

steffahn · November 13, 2024, 8:23am

FYI, releases.rs itself is an unofficial website, not part of the Rust project, and unrelated to the actual release process. Of course, it’s a very useful website a community member kindly created on GitHub, which helps to get a good overview about release notes of former releases, and ongoing work on future releases; but if they don’t want to keep it up anymore, it might disappear or fall out of date.

The question of the order of publishing of the Rust release available through rustup vs. tags and/or release-notes appearing on GitHub is a different one, and I don’t know the exact answer to that one.

steffahn · November 13, 2024, 8:34am

It looks like I’ve found the relevant part of the release script

here seem to be the uploads for rustup etc, so the release actually exists and is usable afterwards:

github.com

rust-lang/promote-release/blob/110ad45f13ac5f0aa660acc218c090c6b24f14c8/src/main.rs#L246-L248


      
          self.publish_archive()?;
          self.publish_docs()?;
          self.publish_release()?;

And then only afterwards, here it creates the blog post and the tag on GitHub

github.com

rust-lang/promote-release/blob/110ad45f13ac5f0aa660acc218c090c6b24f14c8/src/main.rs#L256-L263


      
          // This takes care of announcing stable releases (whether dev-static or not) on the blog
          // and internals.
          self.blog_and_discourse()?;
          
          // We do this last, since it triggers triagebot posting the GitHub
          // release announcement (and since this is not actually really
          // important).
          self.tag_release(&rev, &mut signer)?;

so it looks like the answer to your question is: yes^[1] it’s guaranteed that the tag, and subsequently also the Release on GitHub only happens after the release is actually available.

at least at the moment

I don’t see however any good reason why this should ever change in the future – who would want to publish release announcements before the release is usable? E.g., what if the release publishing fails, but it’s already announced? ↩︎

random_user · November 13, 2024, 3:45pm

Thanks for digging! And thanks for the note about releases.rs. A little more digging pointed me to the default distribution server, https://static.rust-lang.org

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When are new Rust releases published to Github?

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