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fix(save): replace files atomically

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Replace native engine saves and engine/MCP exports atomically, preserving private permissions during staging and cleaning up failed writes. Add regressions for long filenames and caught writer unwinding.

Fixes #436.

Co-authored-by: aiongg <aiongtaigi@gmail.com>
Co-authored-by: skylar taylor-barrick <hi@skylar.cc>
This commit is contained in:
aiongg
2026-10-12 09:19:36 -06:00
committed by GitHub
co-authored by aiongg skylar taylor-barrick
parent 3624f48819
commit 5cdcac4ace
13 changed files with 417 additions and 19 deletions
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crates/engine/src/cmd/library.rs
+1 -1
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@@ -29,7 +29,7 @@ impl Library {
#[cfg(not(target_arch = "wasm32"))]
if let Some(p) = &self.path {
let bytes = serde_json::to_vec_pretty(self).map_err(|e| crate::EngineError::Other(e.to_string()))?;
std::fs::write(p, bytes).map_err(|e| crate::EngineError::Other(format!("{p}: {e}")))?;
crate::atomic::write_file(p, &bytes)?;
}
Ok(())
}