Machine-readable version of "Last available"?

[RalfJung]

For use-cases like running nightly Clippy or Miri on CI, it would be very useful to be able to determine the last version of rustc that had that component included. This site has all the necessary information for that, but it is not available in a machine-readable way. Do you think that would be a reasonable extension?

I could imagine either a JSON file (so a script could use jq), or maybe just one file per component containing the latest date (so plain curl is enough -- jq IIRC is not available on macOS with Travis).

[mexus]

Yeah it's quite a nice idea, and I'd say we can actually have both a single json that contains all the info and a set of files with dates.
Let's see what I can do about it :)

[mexus]

So what I came up with so far is generating a file tree like the following

... with all the files containing the latest available date (like 2019-12-20), and "no file" means "no info" for the meantime (the "meantime" is currently 29 days back in time).

So the data will be fetchable via a link like http://rust-lang.github.io/rustup-components-history/last-available/x86_64-unknown-linux-gnu/rust-analysis. @RalfJung did I miss anything?

[RalfJung]

That sounds pretty awesome! So I can just do nightly-$(curl http://rust-lang.github.io/rustup-components-history/last-available/x86_64-unknown-linux-gnu/miri) to figure out the last nightly with miri?

[mexus]

Yep! No json with all the info gathered in one place yet, but I hope I'll come up with a viable solution in the next few days for that matter as well

…

On Sun, Jun 9, 2019, 12:05 AM Ralf Jung ***@***.***> wrote: That sounds pretty awesome! So I can just do nightly-$(curl http://rust-lang.github.io/rustup-components-history/last-available/x86_64-unknown-linux-gnu/miri ) to figure out the last nightly with miri? — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#5?email_source=notifications&email_token=AA3RGDJCKSRJHC7SWIM5KTTPZQNKNA5CNFSM4HS3JMU2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODXH6IXY#issuecomment-500163679>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA3RGDN3VSZZZF3VQKXXZV3PZQNKNANCNFSM4HS3JMUQ> .

[RalfJung]

Well this is already enough for my usecase, but there are probably others. :)

[mexus]

$ echo nightly-$(curl -s https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/miri)
nightly-2019-06-08

🎉

[mexus]

I think I'll put on ice making a combined json file and close the issue for now :)

[RalfJung]

Awesome, thank you so much. :)

I'll play around with this later.