--- /dev/null
+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)
+}