locate the path of an installed node module
$ npm install @lite-js/module-path [-g]
const modulePath = require('@lite-js/module-path')
// global module
console.log(modulePath('zfinder'))
// => /Users/liangwensen/.nvm/versions/node/v4.2.2/lib/node_modules/.zfinder_npminstall/zfinder/0.2.9/zfinder/lib/index.js
// local module
console.log(modulePath('mocha'))
// => /Users/liangwensen/repo/leungwensen/module-path/node_modules/.npminstall/mocha/3.4.2/mocha/index.js
// core module
console.log(modulePath('path'))
// => path
$ npm install @lite-js/module-path -g
$ module-path zfinder
# /Users/liangwensen/.nvm/versions/node/v4.2.2/lib/node_modules/.zfinder_npminstall/zfinder/0.2.9/zfinder/lib/index.js
$ module-path npm
# /Users/liangwensen/.nvm/versions/node/v4.2.2/lib/node_modules/npm/lib/npm.js