Save express routes to file (express-list-endpoints)

index.js

const listEndpoints = require('express-list-endpoints')

var app = express();

//express setup

//then list them
// This is quick and dirty (no error probably cannot be run more than once correctly)
fs.mkdir(__dirname + "/tmp/", { recursive: true }, (err) => {

  fs.writeFile(__dirname + "/tmp/routes.json", JSON.stringify(listEndpoints(app), null, 2), { flag: 'wx' }, function(err) {
    if(err) {
      return console.log(err);
    }

    console.log("The file was saved!");
  }); 
});