fix(setup): handle native Windows paths in pn/pnpx/pnx and the pnpm placeholder by Ayush442842q · Pull Request #14901 · pnpm/pnpm

Ayush442842q · 2026-09-14T17:47:29Z

Summary

The POSIX scripts pn, pnpx, pnx (in pnpm/npm/pnpm/) and the pnpm placeholder walk $0 to find the file beside them. The walk treats only / as a separator, so a native Windows $0 such as C:\Users\me\node_modules\pnpm\pn is taken for a bare name, prefixed with ./, and rerooted on the working directory. The alias then either fails its regular-file guard or reaches a different pnpm.

This PR applies the same drive-letter / UNC-prefix gate that the pnpm setup writers already use (as of #14797) to all four files. The same fix is also applied to the @pnpm/exe counterparts under pnpm11/pnpm/artifacts/exe/ (the committed pn, pnpx, pnx scripts and the prepare.js generator).

Fixes #14884

Squash Commit Body

Apply the same drive-letter and UNC-prefix gate that the setup
writers already use to the four published sh scripts that were
left out of pnpm/pnpm#14797: pn, pnpx, pnx, and the pnpm
placeholder in pnpm/npm/pnpm.

The gate converts backslash separators to forward slashes only
when the path starts with a drive letter or a UNC prefix,
leaving Unix paths that contain a literal backslash unchanged.
The conversion uses shell parameter expansion rather than echo
or sed to avoid dash mangling backslash escapes.

Also applies the same fix to prepare.js and the committed pn,
pnpx, pnx scripts under pnpm11/pnpm/artifacts/exe, which
generate the same walk for the `@pnpm/exe` package.

Fixes pnpm/pnpm#14884

Checklist

I checked the referenced issue and verified that none of the PRs
already linked to it solves it.
New features are implemented only in the Rust pnpm v12 CLI. Bug fixes
are implemented in every affected version.
Added a changeset (pnpm changeset) if this PR changes any published
package. Keep it short and written for pnpm users — it becomes a release note.
Added or updated tests.
Updated the documentation if needed.

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}

Summary by CodeRabbit

Bug Fixes
- Fixed Windows path handling when launching pnpm and related commands through Git Bash, MSYS2, or Cygwin.
- Commands now correctly resolve drive-letter and UNC paths, improving startup and execution reliability in these environments.
- Unix-style paths continue to work as before.

…laceholder Apply the same drive-letter and UNC-prefix gate that the setup writers already use to the four published sh scripts that were left out of pnpm#14797: pn, pnpx, pnx, and the pnpm placeholder in pnpm/npm/pnpm. The gate converts backslash separators to forward slashes only when the path starts with a drive letter or a UNC prefix, leaving Unix paths that contain a literal backslash unchanged. The conversion uses shell parameter expansion rather than echo or sed to avoid dash mangling backslash escapes. Also applies the same fix to prepare.js and the committed pn, pnpx, pnx scripts under pnpm11/pnpm/artifacts/exe, which generate the same walk for the `@pnpm/exe` package. Fixes pnpm#14884

qodo-code-review · 2026-09-14T17:47:35Z

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coderabbitai · 2026-09-14T17:47:59Z

📝 Walkthrough

Walkthrough

The shell aliases now detect native Windows drive-letter and UNC paths in $0, convert backslashes to forward slashes, and then run the existing symlink resolution. The generated aliases use the same logic. A changeset declares patch releases.

Changes

Windows path alias handling

Layer / File(s)	Summary
Published alias script normalization `pnpm/npm/pnpm/pn`, `pnpm/npm/pnpm/pnpx`, `pnpm/npm/pnpm/pnx`, `pnpm/npm/pnpm/pnpm`	Drive-letter and UNC paths are normalized before directory extraction and symlink resolution. Other paths remain unchanged.
Generated executable alias normalization `pnpm11/pnpm/artifacts/exe/*`, `.changeset/fix-windows-path-alias-bins.md`	The generated aliases and launcher template use the same normalization. The changeset declares patch releases for `@pnpm/exe`, `pnpm`, and `pacquet`.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Assessment against linked issues

Objective	Addressed	Explanation
Normalize native Windows `$0` values for the published aliases and the `pnpm` placeholder [`#14884`]	✅
Apply the same handling to aliases generated by `@pnpm/exe` [`#14884`]	✅

Suggested labels: product: pnpm@11, product: pacquet

Merge Risk: 🔵 Low · up to e97be

Some POSIX installations can resolve an alias to the wrong executable when its valid pathname starts with a Windows-like prefix. Guard the conversion and add the platform-path regression cases before merging.

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greptile-apps · 2026-09-14T17:50:20Z

Confidence Score: 4/5

The implementation appears behaviorally sound, but the explicit repository requirement for equivalent v11/v12 regression coverage must be satisfied before merging.

_{Reviews (1) · Last reviewed commit: "fix(setup): handle native Windows paths ..."}

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Actionable comments posted: 3

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Inline comments:
In `@pnpm/npm/pnpm/pn`:
- Line 18: Guard Windows-path separator conversion so it runs only when the
runtime identifies MSYS or Cygwin, preserving literal backslashes on POSIX.
Apply this consistently to all four published scripts, unixScript in prepare.js,
the generated pn, pnpx, and pnx aliases, and their corresponding setup
templates.
- Around line 12-26: Add published alias tests covering drive-letter and UNC $0
path conversion, plus a POSIX path containing a literal backslash, for pn, pnpx,
pnx, and placeholder launchers. Preserve the existing Unix invocation and
symlink-resolution coverage while verifying each launcher handles these path
forms correctly.

In `@pnpm11/pnpm/artifacts/exe/prepare.js`:
- Around line 51-52: Add regression cases in the setup test covering the
generated alias path normalization branch around the shell case pattern:
drive-letter $0, UNC $0, and Unix $0 values containing literal backslashes. Keep
the existing ordinary Unix path coverage and assert the expected normalized
alias output for each new path class.

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review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr.

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between a8ade49 and e97be90.

📒 Files selected for processing (9)

.changeset/fix-windows-path-alias-bins.md
pnpm/npm/pnpm/pn
pnpm/npm/pnpm/pnpm
pnpm/npm/pnpm/pnpx
pnpm/npm/pnpm/pnx
pnpm11/pnpm/artifacts/exe/pn
pnpm11/pnpm/artifacts/exe/pnpx
pnpm11/pnpm/artifacts/exe/pnx
pnpm11/pnpm/artifacts/exe/prepare.js

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Ayush442842q requested a review from zkochan as a code owner September 14, 2026 17:47

coderabbitai Bot added product: pacquet product: pnpm@11 labels Sep 14, 2026

greptile-apps Bot reviewed Sep 14, 2026

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coderabbitai Bot requested changes Sep 14, 2026

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Comment thread pnpm/npm/pnpm/pn

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coderabbitai Bot approved these changes Sep 14, 2026

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fix(setup): handle native Windows paths in pn/pnpx/pnx and the pnpm placeholder - #14901

fix(setup): handle native Windows paths in pn/pnpx/pnx and the pnpm placeholder#14901
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Ayush442842q:fix-pnpm-issue-14884

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