[eduardomourar]

Centralizes the ~400 #[cfg_attr(wasi_runner, ignore = "...")] annotations across the integration tests behind #[uutests::wasi_ignore(ReasonKey)], a proc-macro attribute defined in a new tests/uutests_procs crate.

Context: As per PR 14884 and PR 13687 flagged wasi_runner as a noisy, ad hoc cfg. It can't be replaced with target_os, since the tests always compile for the host (WASI can't spawn the child process they launch) — wasi_runner is the only signal a run is driving a wasm32-wasip1/wasm32-wasip2 binary via wasmtime. This doesn't remove the cfg, just the string-literal duplication around it: every reason is now defined once, alphabetically, in tests/uutests_procs/src/lib.rs 42 keys, down from an initial 57 after merging duplicates), including several that previously had no explanation at all.

#[uutests::wasi_ignore(Reason)] can also be applied to a mod { ... } block instead of one #[test] fn at a time; it recurses into nested modules and attaches the reason to every test inside. tee's linux_only module (21 tests) and truncate's fifo module (3 tests) use this instead of repeating the same key on every test.

Not touched: structural gates that aren't ignore-reasons (feat_diagnostics module gating, #[cfg(wasi_runner)] branches selecting alternate passing assertions).

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/id/setgid. tests/id/setgid is passing on 'main'. Maybe you have to rebase?

[codspeed]

Merging this PR will not alter performance

1 warning, 1 note

⚠️ 118 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

ℹ️ 1 benchmark has no flamegraph

The flamegraph wasn't generated: most of the time was spent in runtime internals, which would leave nothing useful to analyze.

See affected benchmarks

✅ 401 untouched benchmarks
⏩ 70 skipped benchmarks¹

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_{Comparing eduardomourar:refactor/wasi-ignore-reasons (aebb327) with main (366c18c)²}

Footnotes

1. 70 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (6f5138a) during the generation of this report, so 366c18c was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[eduardomourar]

Maybe we can remove this whole file and add those as comments in tests/uutests_procs/src/lib.rs