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@Urgau Urgau commented Jun 10, 2025

When remapping, bootstrap sets CFG_VIRTUAL_RUST_SOURCE_BASE_DIR to indicate what the base build dir (/ of this repo) was remapped to, ie. /rustc/....

It is therefore impossible when stripping /rustc/... from a remapped path to be inside the our library/ directory, nevertheless we have code that assumed it was possible and helpfully tried to correct it. I don't why this was done, but it's not necessary.

The normalization in compiletest of $SRC_DIR_REAL was also slightly wrong, it ate the library part for no reason. EDIT: there is a reason, it affects too much tests otherwise

r? @jieyouxu

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rustbot commented Jun 10, 2025

jieyouxu is not on the review rotation at the moment.
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@rustbot rustbot added A-compiletest Area: The compiletest test runner A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jun 10, 2025
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rustbot commented Jun 10, 2025

Some changes occurred in src/tools/compiletest

cc @jieyouxu

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@Urgau Urgau force-pushed the cleanup-rust-src-remap branch from 3679077 to 1861535 Compare June 11, 2025 05:33
@Urgau Urgau force-pushed the cleanup-rust-src-remap branch from 1861535 to 208f2e4 Compare June 11, 2025 05:43
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Hm yeah, that seems reasonable. Thanks

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@bors r+ rollup

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bors commented Jun 11, 2025

📌 Commit 208f2e4 has been approved by jieyouxu

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 Jun 11, 2025
@jieyouxu jieyouxu added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. A-path-remapping Area: path remapping, --remap-path-prefix, --remap-cwd-prefix, --remap-diagnostics-scope etc. 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-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. A-compiletest Area: The compiletest test runner labels Jun 11, 2025
bors added a commit that referenced this pull request Jun 12, 2025
Rollup of 10 pull requests

Successful merges:

 - #141307 (Add method to retrieve body of closure in stable-mir)
 - #142040 (transmutability: shift abstraction boundary)
 - #142066 (More simple 2015 edition test decoupling)
 - #142157 (rustc_resolve: Improve `resolve_const_param_in_non_trivial_anon_const` wording)
 - #142217 (`tests/ui`: A New Order [10/N])
 - #142219 (`tests/ui`: A New Order [11/N])
 - #142261 (use correct edition when warning for unsafe attributes)
 - #142303 (Assorted bootstrap cleanups (step 1))
 - #142318 (Cleanup `rust-src` remapping and real dir)
 - #142352 (compiler: Make `c_int_width` an integer)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 78d8395 into rust-lang:master Jun 12, 2025
10 checks passed
@rustbot rustbot added this to the 1.89.0 milestone Jun 12, 2025
rust-timer added a commit that referenced this pull request Jun 12, 2025
Rollup merge of #142318 - Urgau:cleanup-rust-src-remap, r=jieyouxu

Cleanup `rust-src` remapping and real dir

When remapping, `bootstrap` sets `CFG_VIRTUAL_RUST_SOURCE_BASE_DIR` to indicate what the base build dir (`/` of this repo) was remapped to, ie. `/rustc/...`.

It is therefore impossible when stripping `/rustc/...` from a remapped path to be inside the our `library/` directory, nevertheless we have code that assumed it was possible and helpfully tried to correct it. I don't why this was done, but it's not necessary.

~~The normalization in compiletest of `$SRC_DIR_REAL` was also slightly wrong, it ate the `library` part for no reason.~~ EDIT: there is a reason, it affects too much tests otherwise

r? `@jieyouxu`
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A-path-remapping Area: path remapping, --remap-path-prefix, --remap-cwd-prefix, --remap-diagnostics-scope etc. A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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5 participants