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fs: fix fs.promises.realpath for long paths on Windows
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Unlike other fs functions that work with paths, realpath isn't
using pathModule.toNamespacedPath prior to calling libuv function. This
is causing issues on windows.

Windows long path test is also improved to cover the mentioned issue.

Fixes: #51031
PR-URL: #51032
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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sapphi-red authored and RafaelGSS committed Jan 2, 2024
1 parent 652af45 commit 091098f
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Showing 2 changed files with 4 additions and 1 deletion.
2 changes: 1 addition & 1 deletion lib/internal/fs/promises.js
Original file line number Diff line number Diff line change
Expand Up @@ -1160,7 +1160,7 @@ async function realpath(path, options) {
options = getOptions(options);
path = getValidatedPath(path);
return await PromisePrototypeThen(
binding.realpath(path, options.encoding, kUsePromises),
binding.realpath(pathModule.toNamespacedPath(path), options.encoding, kUsePromises),
undefined,
handleErrorFromBinding,
);
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3 changes: 3 additions & 0 deletions test/parallel/test-fs-long-path.js
Original file line number Diff line number Diff line change
Expand Up @@ -46,4 +46,7 @@ fs.writeFile(fullPath, 'ok', common.mustSucceed(() => {

// Tests https://github.com/nodejs/node/issues/39721
fs.realpath.native(fullPath, common.mustSucceed());

// Tests https://github.com/nodejs/node/issues/51031
fs.promises.realpath(fullPath).then(common.mustCall(), common.mustNotCall());
}));

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