The semver parser for node (the one npm uses)

tar for node

Walk through a folder and figure out what goes in an npm package

normalizes package metadata, typically found in package.json file.

Add callbacks to requests in flight to avoid async duplication

The logger that npm uses

Run this in a node package, and it'll tell you which things in node_modules are bundledDependencies, or transitive dependencies of bundled dependencies.

Turn any flavor of allowable package.json bin into a normalized object

Advanced FS Streaming for Node