# npm-cache-filename Given a cache folder and url, return the appropriate cache folder. ## USAGE ```javascript var cf = require('npm-cache-filename'); console.log(cf('/tmp/cache', 'https://registry.npmjs.org:1234/foo/bar')); // outputs: /tmp/cache/registry.npmjs.org_1234/foo/bar ``` As a bonus, you can also bind it to a specific root path: ```javascript var cf = require('npm-cache-filename'); var getFile = cf('/tmp/cache'); console.log(getFile('https://registry.npmjs.org:1234/foo/bar')); // outputs: /tmp/cache/registry.npmjs.org_1234/foo/bar ```