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docs(path): explain the Bun Rust resolver choice #325

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Merged
steipete merged 1 commit into from
Sep 13, 2026
Merged

docs(path): explain the Bun Rust resolver choice #325

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5 changes: 4 additions & 1 deletion src/realpath.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@ function resolve(input: string, native: boolean): string {
if (bunPosix) {
// Bun 1.4.2 normalizes native path components and opens the leaf for reads.
// The Rust OS resolver preserves permissions, locks and physical spelling.
// Reuse our N-API addon so this also works with JIT disabled; Bun's FFI
// bridge requires JIT and would duplicate native loading and memory handling.
// Remove this routing once the Bun baseline includes oven-sh/bun#42374.
if (input.includes("\0")) {
throw Object.assign(new TypeError("realpath input must not contain null bytes"), {
Expand All @@ -32,7 +34,8 @@ function resolve(input: string, native: boolean): string {
if (getFsSafeNativeConfig().mode === "require") {
throw new FsSafeError("helper-unavailable", "native fs-safe canonicalization is unavailable");
}
// Honor off/missing-addon policy. These modes retain Bun's runtime limits.
// The workaround belongs to the same optional addon, so "off" disables it
// too. With off or a missing addon in auto, Bun's upstream limits still apply.
}
return native ? fs.realpathSync.native(input) : fs.realpathSync(input);
}
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