29064034ba
## Summary Apparently this is about ~18x faster (2.25s → 0.12s) for a single-file change, and ~2x faster (2.36s → 1.25s) for `prek run -a`.
30 lines
1015 B
Rust
30 lines
1015 B
Rust
//! Fuzzer harness which actively tries to find testcases that cause Ruff to introduce errors into
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//! the resulting file.
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#![no_main]
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use libfuzzer_sys::{Corpus, fuzz_target};
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use ruff_linter::settings::LinterSettings;
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use std::sync::OnceLock;
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static SETTINGS: OnceLock<LinterSettings> = OnceLock::new();
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fn do_fuzz(case: &[u8]) -> Corpus {
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// throw away inputs which aren't utf-8
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let Ok(code) = std::str::from_utf8(case) else {
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return Corpus::Reject;
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};
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// the settings are immutable to test_snippet, so we avoid re-initialising here
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let settings = SETTINGS.get_or_init(LinterSettings::default);
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ruff_linter::test::set_max_iterations(usize::MAX);
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// unlike in the test framework, where the number of iterations is well-defined, we are only
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// looking for situations where a fix is bad; thus, we set the iterations to "infinite"
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let _ = ruff_linter::test::test_snippet(code, settings);
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Corpus::Keep
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}
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fuzz_target!(|case: &[u8]| -> Corpus { do_fuzz(case) });
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