node_modules/npm/lib/utils/read-local-package.js

exports = module.exports = readLocalPkg

var npm = require("../npm.js")
  , readJson = require("read-package-json")

function readLocalPkg (cb) {
  if (npm.config.get("global")) return cb()
  var path = require("path")
  readJson(path.resolve(npm.prefix, "package.json"), function (er, d) {
    return cb(er, d && d.name)
  })
}