utils.js

var path = require('path');
var exec = require('child_process').exec;

// use git rev-parse to find the .git directory
exports.findGitRoot = function (callback) {
  exec('git rev-parse --show-toplevel', function (err, stderr) {
    if (err) return callback(err);
    callback(null, stderr.trim());
  });
};

// traverse from this module's directory upwards until you find
// the project root, which is the first directory whose parent is
// *not* named node_modules
exports.findProjectRoot = function (base) {
  base = base || __dirname;
  var dir = path.resolve(base, '..');
  if (path.basename(dir) !== 'node_modules') {
    return dir;
  }
  return exports.findProjectRoot(dir);
};

exports.findPackageJson = function () {
  var dir = exports.findProjectRoot();
  return path.join(dir, 'package.json');
};