1.22.2.4

cached-package-root.js
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			var assert = require('assert')
			var resolve = require('path').resolve

			var npm = require('../npm.js')

			module.exports = getCacheRoot

			function getCacheRoot (data) {
			assert(data, 'must pass package metadata')
			assert(data.name, 'package metadata must include name')
			assert(data.version, 'package metadata must include version')

			return resolve(npm.cache, data.name, data.version)
			}