Create folder or use existing

mkdirpSync.js

function mkdirpSync (dirpath) {
  var fs = require('fs');
  var parts = dirpath.split(path.sep);
  for( var i = 1; i <= parts.length; i++ ) {
    try {
      fs.mkdirSync(path.join.apply(null, parts.slice(0, i)));
    } catch(e) {
      if ( e.code != 'EEXIST' ) throw e;
    }
  }
}

mkdirpSync('apple/orange');
mkdirpSync('apple/orange/grape');
mkdirpSync('apple');

// Will create:
// apple
// | orange
//   | grape