1695828 - Please update the Rust Update Policy document

Status: RESOLVED FIXED

(Firefox Build System :: Toolchains, task)

Description

[Markus Stange [:mstange]]

https://wiki.mozilla.org/Rust_Update_Policy_for_Firefox

The policy currently says:

We require a new stable Rust starting 2 weeks after it is released.

glandium tells me that that's not the case any more.

Please update the document.

Comment 1

[Markus Stange [:mstange]]

The imported policy document at https://firefox-source-docs.mozilla.org/writing-rust-code/update-policy.html still has the same problem.

Comment 2

[Henri Sivonen (:hsivonen)]

I think it would be good to have an explanation for why we're maintaining a 1.47.0 MSRV to the point of adding hacks that offend the Rust community.

(Someone on HN discovered https://searchfox.org/mozilla-central/source/third_party/rust/xmldecl/build.rs , which exists due to the 1.47.0 MSRV and not due to SIMD issues. This time, the high-level bad experience that was, on HN, Lobsters, and Reddit, initially blamed on Firefox's use of RUSTC_BOOTSTRAP turned out to be something different, though. )

Comment 3

[Mike Hommey [:glandium]]

(In reply to Henri Sivonen (:hsivonen) from comment #2)

I think it would be good to have an explanation for why we're maintaining a 1.47.0 MSRV to the point of adding hacks that offend the Rust community.

We aren't, see bug 1715282.

Comment 4

[Henri Sivonen (:hsivonen)]

It would really clear up confusion (mine at least) to say in the policy doc what we are doing (that's neither requiring a new stable Rust starting 2 weeks after it is released nor maintaining a particular MSRV).

Comment 5

[Mike Hommey [:glandium]]

Attachment: Bug 1695828 - Update the Rust Update Policy to reflect the current practices.

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d358e5080b29
Update the Rust Update Policy to reflect the current practices. r=bholley

Comment 7

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/d358e5080b29