Run install in package-json-file's directory

[haines]

Fixes #17

Summary by CodeRabbit

• Bug Fixes
  • pnpm install now runs from the directory containing the configured package manifest, improving installation reliability for projects with nonstandard layouts.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 2c7b3779-2399-4f1f-b166-d82269594463

📥 Commits

Reviewing files that changed from the base of the PR and between 84cb39b and 0d2ec8e.

⛔ Files ignored due to path filters (1)

• dist/index.js is excluded by !**/dist/**

📒 Files selected for processing (1)

• src/pnpm-install/index.ts

📜 Recent review details

🧰 Additional context used

🧠 Learnings (1)

📚 Learning: 2026-05-11T16:19:49.450Z

Learnt from: zkochan
Repo: pnpm/setup PR: 1
File: src/cache-restore/run.ts:35-35
Timestamp: 2026-05-11T16:19:49.450Z
Learning: When using `actions/exec` (`getExecOutput` / `exec`), it is valid for the `commandLine` option to include both the command and its arguments in a single string (e.g., `getExecOutput('pnpm store path --silent')`). The library tokenizes `commandLine` internally (via `argStringToArray()`), so this behaves like passing an equivalent command + args array (e.g., `getExecOutput('pnpm', ['store','path','--silent'])`). In code reviews, do not flag this as incorrect—this matches documented behavior and a production-tested pattern.

Applied to files:

• src/pnpm-install/index.ts

🔇 Additional comments (1)

src/pnpm-install/index.ts (1)

37-37: LGTM!

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📝 Walkthrough

Walkthrough

runPnpmInstall now runs pnpm install from the directory containing the configured package manifest. Existing error and nonzero-status handling remains unchanged.

Changes

pnpm installation

Layer / File(s)	Summary
Use the manifest directory for installation src/pnpm-install/index.ts	The pnpm install subprocess now uses the manifest’s parent directory as its working directory instead of GITHUB_WORKSPACE.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• pnpm/setup#1: Changes the same installation working-directory behavior.
• pnpm/setup#11: Changes related runPnpmInstall installation arguments.

Suggested reviewers: zkochan

Poem

A rabbit hops where packages grow,
Into the manifest folder below.
pnpm install now starts in the right place,
While errors keep their familiar face.
Monorepo paths can rest easy tonight.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: running installation in the directory that contains package-json-file.
Linked Issues check	✅ Passed	The code runs pnpm install from the package manifest directory, which directly satisfies issue #17 for nested package.json files.
Out of Scope Changes check	✅ Passed	The one-line change is directly related to the linked issue and introduces no unrelated code changes.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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