Adds support for package map generation#7184
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Does this mean in the future custom .pnp loader will not be necessary? I guess the only missing bit would be loading files from zip archives |
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Yes, that's what I want to reach. Archived packages are an issue, but we could have a mode where Yarn installs packages in a global store on disk (unpacked). It would have some drawbacks, but the compatibility would still go way up. |
This was referenced Jun 15, 2026
arcanis
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Counterpart of yarnpkg/berry#7184 for the Rust implementation. <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Medium Risk** > Touches install linking, generated artifacts, and `NODE_OPTIONS` for all scripts; behavior changes module resolution when package maps are enabled, though defaults keep the feature off. > > **Overview** > Adds **Node.js experimental package map** support for `nodeLinker: node-modules` and `nodeLinker: pnpm` (Rust zpm counterpart to Berry #7184). > > New settings **`nodeExperimentalPackageMap`** (inject `--experimental-package-map=…` into `NODE_OPTIONS` when enabled) and **`nodePackageMapType`** (`standard` vs `loose` dependency edges). During link, the **node-modules** and **pnpm** linkers build and write **`node_modules/.package-map.json`** (per-workspace for node-modules islands), tracking installed layout and declared vs hoisted dependencies. **`script` environments** refresh/strip package-map flags alongside PnP loaders, using island-aware map paths when cwd is in a node-modules island. > > Supporting changes: new **`linker/package_map`** module, **`Project::package_map_path`**, PnP linker cleanup removes stale maps, **`Path::without_trailing_separators`**, and acceptance tests for maps, loose mode, and island injection. > > <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit 889778e. Bugbot is set up for automated code reviews on this repo. Configure [here](https://www.cursor.com/dashboard/bugbot).</sup> <!-- /CURSOR_SUMMARY --> --------- Co-authored-by: Cursor Agent <cursoragent@cursor.com>
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This PR implements support for generating package maps.
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