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Avoid panicking on missing fallback #101952

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merged 1 commit into from Sep 22, 2022

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Mark-Simulacrum
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This just prints a message but continues on if a fallback is missing, which can happen when we're building a partial set of builders and producing a dev-static build from it (e.g., when no Apple builder runs at all).

Probably the more extensive fix is to allow the build-manifest invoker to specify the expected set of targets & hosts, but that's a far more extensive change. The main risk from this is that we accidentally start falling back to linux docs across all platforms without noticing. I'm not sure that we can do much about that though at this time.

cc @ehuss since IIRC you participated in adding this system

This comes up when building a test nightly from a try build, e.g., #101855 (comment). For now I'm going to manually cherry pick this onto that PR for testing purposes.

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@Mark-Simulacrum: no appropriate reviewer found, use r? to override

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Sep 17, 2022
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Yea, it's a bit unfortunate to lose the assurance that the fallbacks are working. However, it was a pretty weak assurance since there aren't any checks on the final artifacts. People will just need to be extra careful when modifying DOCS_FALLBACK.

src/tools/build-manifest/src/main.rs Outdated Show resolved Hide resolved
This just prints a message but continues on if a fallback is missing,
which can happen when we're building a partial set of builders and
producing a dev-static build from it (e.g., when no Apple builder runs
at all).

Probably the more extensive fix is to allow the build-manifest invoker
to specify the expected set of targets & hosts, but that's a far more
extensive change. The main risk from this is that we accidentally start
falling back to linux docs across all platforms without noticing. I'm
not sure that we can do much about that though at this time.
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ehuss commented Sep 21, 2022

@bors r+ rollup

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bors commented Sep 21, 2022

📌 Commit 84fb168 has been approved by ehuss

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Sep 21, 2022
bors added a commit to rust-lang-ci/rust that referenced this pull request Sep 22, 2022
Rollup of 12 pull requests

Successful merges:

 - rust-lang#101952 (Avoid panicking on missing fallback)
 - rust-lang#102030 (Don't crate-locally reexport walk functions in tidy)
 - rust-lang#102032 (Adding ignore fuchsia tests for signal interpretation cases)
 - rust-lang#102033 (Adding needs-unwind to nicer-assert-messages compiler ui tests)
 - rust-lang#102054 (Unify "all items" page's sidebar with other pages)
 - rust-lang#102071 (Adding needs-unwind for tests testing memory size of Futures/Closures)
 - rust-lang#102073 (Adding ignore fuchsia tests for execvp)
 - rust-lang#102075 (rustdoc: remove no-op CSS `.content > .methods > .method`)
 - rust-lang#102079 (Update books)
 - rust-lang#102084 (Adding needs-unwind for test using panic::catch_unwind)
 - rust-lang#102100 (Prevent usage of .stab elements to create scrollable areas in doc blocks)
 - rust-lang#102102 (Add doc aliases on Sized trait)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit b08c8cb into rust-lang:master Sep 22, 2022
@rustbot rustbot added this to the 1.66.0 milestone Sep 22, 2022
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6 participants